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    5,000 Java jobs found

    ...well-documented REST or GraphQL API so the mobile front-end remains fast and future-proof. • Include an admin panel (web or mobile) where I can onboard vendors, approve listings, run promotions, and review transactions. • Provide full source code, build instructions, and brief hand-off training. • Assist with Google Play submission and one round of post-launch bug fixes. Tech preferences Kotlin or Java for Android, backend in Node.js, Laravel, or similar—happy to hear alternatives if they speed development or improve maintainability. Acceptance criteria 1. All primary buyer and seller journeys work smoothly on physical Android devices running 10+. 2. UI passes standard accessibility checks and device-size responsiveness tests. 3. Codebase comp...

    $10 / hr Average bid
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    21 bids

    ...themes later if I choose. Gameplay has to feel smooth and professional. Fast, responsive touch controls are essential, and performance should remain solid even on older Android devices. Subtle animations are welcome as long as they never slow the game down. I will open the project in the latest stable version of Android Studio, so please target a recent Android SDK and use either Kotlin or modern Java along with best-practice patterns (MVVM or similar, sensible resource organization, and clear separation between UI and game logic). Comment the critical parts of the engine—move validation, game-state evaluation, and UI interactions—so another developer can follow the flow without guesswork. Deliverables • Release-ready APK for testing on real devices •...

    $444 Average bid
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    60 bids

    ...in memory footprint. What you’ll actually do • Profile the APK with Android Studio Profiler, Systrace, and (if you prefer) tools such as Firebase Performance or LeakCanary to isolate hot paths and leaks. • Review the API layer and suggest tweaks—batching, caching, pagination, or server-side query changes—so network latency no longer blocks the UI thread. • Refactor any inefficient Kotlin/Java code, bitmaps, or Rx/Coroutine chains that are driving up CPU or memory. • Produce a concise before-and-after report that includes launch time, frame time, and heap size metrics, backed by screenshots or log exports. Acceptance criteria 1. App cold-start drops below 2 s on a mid-range Android 11 device. 2. No visible jank when scrolling the...

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    ...matches the industrial design of the phone • Run smoothly on the latest AOSP release and remain compatible with upcoming versions • Include core screens (home, app drawer, notification shade, quick settings, settings menu) with fluid animations and Material-next styling • Support essential Google Mobile Services integration so standard apps behave normally Deliverables 1. Source code (Kotlin/Java with Android Studio or compatible build system) 2. Flashable image or instructions for integrating the UI into an AOSP build 3. Brief developer documentation covering architecture, theming guidelines, and how to extend or localise the interface I’m open to suggestions on additional enhancements—pre-installed apps or advanced security layers coul...

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    35 bids

    Our product team in Hyderabad is ready to onboard a fresh graduate who can take full-stack responsibility for completely new application development, combining Java + Spring Boot on the server side with React on the client side. Day-to-day you will design RESTful endpoints in Spring Boot, wire them to a clean React interface, write unit tests, and commit everything to Git with well-documented pull requests. Skills to bring: • Solid academic grounding in core Java concepts and object-oriented design • Hands-on familiarity with React. If you are a Hyderabad-based fresher excited about owning features end-to-end in a collaborative, small-team environment, I look forward to working together.

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    22 bids

    ...want the game to steer itself. Your task is to build and plug in smart logic that recognises each layout, decides the optimal route, and moves the miner to the exit without any manual input—then immediately starts over and does it again. The solver must cope with every maze the game can generate, not just a handful of preset stages. You are free to choose the most suitable language or framework (Java, Kotlin, C++—whichever lets you deliver the cleanest, fastest result and fits easily into the current Android build). Occasional voice calls are essential, so comfortable spoken English is a must let’s discuss how you plan to: • detect the maze reliably on each run, • compute the path in real time, and • drive in-game movement without lag ...

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    78 bids

    ...turned into a fully functional Android application. The idea is still at an early stage, so I’m looking for someone who can guide the entire mobile build-out—from defining a clean architecture to publishing a polished APK on Google Play. Your role will cover: • Designing an intuitive, modern UI that scales well across current Android OS versions • Writing maintainable, well-documented Kotlin or Java code (your call, just explain your choice) • Integrating any required APIs or back-end endpoints once the scope is clarified • Supplying a release-ready build plus full source code and concise setup instructions If you’ve shipped Android apps before, please share Play Store links or GitHub repos that highlight relevant experience. When y...

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    Mobile app needed in java, android studio with AI work of Python from Pakistan or India new freealncer for some easy work

    $5 / hr Average bid
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    48 bids

    I need a polished, production-ready Android application focused entirely on e-commerce. The core requirement is a smooth buying journey—from browsing products, adding items to a cart, and completing a secure checkout, through to receiving order confirmations and basic status updates. The app must be native for Android (Kotlin or Java are both fine) and follow current Material Design guidelines so it feels at home on modern phones and tablets. I already have product data and imagery prepared; what I need is the technical build, an intuitive UI/UX, and connection to a payment gateway such as Stripe or Razorpay. Please include: • Clean, well-commented source code hosted in a private Git repository • A fully signed, Play-Store-ready APK or AAB • Simple a...

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    I’m enhancing an existing Java-based web application and need a junior-level developer located in India to focus purely on the front-end layer. Your day-to-day work will revolve around turning the current UI mock-ups and JSP templates into clean, responsive pages written in standard HTML, CSS and vanilla JavaScript, ensuring they plug smoothly into the already-built Java web stack. You will receive clear design files, access to the project’s Git repository, and a short onboarding call to walk you through our coding conventions. From there, I’ll expect: • Pixel-accurate screens rendered across modern browsers • Lightweight, well-commented CSS with mobile responsiveness baked in • JavaScript kept framework-free unless a use case demands ot...

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    69 bids

    I want an Android app that lets me jot down every Forex position I take during the day and instant...modern Material-style UI that looks native on recent Android versions. I’m not after heavy analytics or alerting systems yet; the priority is reliable trade logging and a clear per-trade profit/loss display. Data can sit locally in Room/SQLite for now, provided the code is structured so cloud sync could be added later. Deliverables • Full Android Studio project and well-commented Kotlin (or Java) source. • Signed release APK ready to install. • Brief README explaining how to build, run, and where trade data is stored. I’ll test by entering a handful of dummy trades and confirming the profit/loss math is accurate to two decimals and the list updates...

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    ...any browser I want to create or close rounds, adjust win ratios, credit or debit coins, view player histories, and export basic reports. Role management for additional operators would be a plus but is not mandatory at launch. Technical notes • Target device: Android (phones and tablets). • Platform: mobile app built with any stable stack you are comfortable with—Flutter, React Native, native Java/Kotlin, etc.—as long as the final APK performs smoothly. • Security: protect API endpoints, validate every transaction server-side, and obfuscate the client build. • Deliverables: full source code, APK ready for Play-Store submission, and hosted admin panel with setup guide. I will test by installing the APK, topping up demo coins, playing several ...

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    46 bids

    Hiring: Senior Java Backend Freelancer – Spring Boot | Microservices | Kafka | Travel Booking Domain Location - Bengaluru only Hi, I am looking for an experienced Java Backend Freelancer (who is available in Bengaluru only) to contribute to a Travel Booking Management project built on a microservices architecture. The technology stack includes Java, Spring Boot, Microservices, Kafka, Pub/Sub, orchestration, and service-to-service communication. Required Skills Java 8/17 Spring Boot Microservices Apache Kafka Pub/Sub Model Service-to-Service Communication Orchestration Patterns REST APIs Event-Driven Architecture The project consists of multiple services and complex workflows, so I am looking for someone who can quickly understand the overall architec...

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    ...non-negotiable. I am still weighing whether to let users create and share their own recipes, so I would like the codebase structured in a way that makes adding user-generated content straightforward in a later update (for example, keeping data models and cloud storage hooks modular). Deliverables • Production-ready APK and Play-Store-ready bundle • Clean, well-commented source code (Kotlin or Java inside Android Studio) pushed to a private Git repo • Basic Firebase or Room database setup for recipes, with grocery-list and timer data persisted locally • Brief hand-off document or walkthrough video so I can maintain and extend the app myself Acceptance criteria 1. All three headline features work smoothly on current Android versions down to API 2...

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    Mobile app needed in java, android studio with AI work from Pakistan or India new freealncer for some easy work

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    I need a production-ready AES implementation that I can drop into our stack to protect data at rest. The focus is on clean, well-documented source code that supports 128, 192, and 256-bit keys, CBC and GCM modes, plus straightforward hooks for key rotation. My environment is a mix of Python micro-services and a Java back-end, so a portable C/C++ core wrapped for those languages—or native, equally secure versions—would work. What matters most is that the code passes standard NIST test vectors, includes unit tests, and ships with a concise integration guide. Deliverables: • Fully commented AES library (source + build instructions) • Test suite confirming compliance with FIPS/NIST vectors • Short README covering integration and key manageme...

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    Local
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    71 bids

    I have a fully-working Android Studio project (Java) that photographs urine test strips and reads the colours, but its interpretation layer is letting us down: colours are detected correctly, yet the final numbers it returns are wrong. I need someone to dig into the existing code, locate the flaw in the result-interpretation logic, and at the same time refine the overall algorithm so the readings become clinically reliable. Because I’m interested in both fixing the bug and improving the core method, you will be free to refactor, recalibrate, or even redesign parts of the analysis pipeline provided the camera capture and colour-extraction steps remain intact. OpenCV and native Android APIs are already integrated, so you will be working inside that framework. Key deliverables:...

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    ...Android mobile application that serves as a social media platform. The core task is to turn my concept into a fully functioning app—from setting up the project in Android Studio, through coding the main social features, to packaging a release-ready APK. At this stage I will provide the feature list, brand assets, and any required APIs; you’ll transform them into clean, well-documented Kotlin or Java code. Expect typical social elements such as user registration, profile pages, a scrolling feed, basic post interactions, and push notifications, but I’m open to your technical guidance on the best architecture and libraries. Deliverables • Full Android Studio project with readable, commented source code • Signed release APK and a debug build for testin...

    $10 / hr Average bid
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    79 bids

    ...connect everything to a reliable back-end (Firebase is fine, but I’m open to alternatives you can justify). Expect standard social features such as secure sign-up/login, profile creation, a real-time feed, messaging or comments, image upload, and push notifications. Performance, clean code, and thoughtful UX are priorities. Deliverables I’ll review for acceptance: • Complete, well-documented Kotlin/Java source code • Release-ready APK plus debug build for testing • Brief setup/installation guide and API keys list • Short walk-through video or call demonstrating core flows If you have launched social apps on Google Play, share them so I can see your style and code quality. Clear communication, adherence to agreed milestones, and responsivene...

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    ...one or more machine learning models and exposes them as a clean, versioned inference API. The gateway needs to handle request queuing under load, model version routing, response caching where appropriate, and consistent error handling when a model fails to return a result. This is a pure backend/API service — no UI work involved. Key requirements: • Strong backend/API development skills (Python, Java, or C#) • Experience serving ML models via API (e.g. FastAPI, TorchServe, Triton, or similar) • Comfortable working with request queuing and rate-limiting under load • Solid testing discipline for API and pipeline reliability Deliverables: • Working inference API endpoint(s) with versioned model routing • Request queuing/rate-limiting and error-h...

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    I'm seeking an experienced software developer to debug a Windows desktop application. The application is primarily used for data management and has encountered a glitch that needs to be resolved. Key Requirements: ...application. The application is primarily used for data management and has encountered a glitch that needs to be resolved. Key Requirements: - Expertise in Windows desktop application development - Strong debugging skills - Experience with data management software is a plus - Ability to deliver quick and efficient solutions Ideal Skills: - Proficiency in relevant programming languages (e.g., C#, Java, etc.) - Familiarity with Windows OS and its intricacies - Previous experience with similar projects Please provide a brief overview of your experience and approac...

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    I need a native Android application whose sole purpose is to help users work smarter and stay organised...believe will boost day-to-day efficiency). Clean Material-design styling, smooth performance on recent Android versions and sensible local data storage are non-negotiable. If you can architect the project so that future integrations—such as Google Workspace or Microsoft Office—can be added without rewriting major sections, that would be ideal. Deliverables • Full Android Studio project (Kotlin or Java) • Signed release-ready APK for testing • Read-me or short screencast showing build/run steps Once the first milestone build is approved I will iterate with you on refinements and UI polish, so the codebase must be well-structured and documented e...

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    I'm looking for an experienced Minecraft developer to create a custom plugin focused on server management tools. The plugin should include: - Player Ma...experienced Minecraft developer to create a custom plugin focused on server management tools. The plugin should include: - Player Management: Tools to manage players effectively, including banning, muting, and teleporting. - Performance Monitoring: Real-time metrics on server performance, such as TPS (ticks per second), memory usage, and active player count. Ideal Skills and Experience: - Proficiency in Java and Minecraft plugin development. - Experience with server management and performance monitoring tools. - Knowledge of Bukkit/Spigot API. Please provide examples of previous work and relevant experience. Looking forwar...

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    I am building a simple yet polished Android application that lets users book time with a “rental boyfriend” right from their phones. The first release is deliberately slim: the core flow should take a customer from selecting a package, through a secure checkout, to a confirmation screen—no social features or in-app chat at this stage. What I need from you is an Android-native build (Kotlin or Java) with fully tested payment integration. I am open to Stripe, Razorpay, PayPal, or another gateway you prefer, as long as it supports one-time charges and handles common payment errors gracefully. A clean, intuitive UI, basic booking logic, and a small admin settings area for toggling prices or availability will round out the MVP. To wrap things up smoothly, please p...

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    ...through server-side PSP/Bank APIs or authenticated callbacks. ### 7. Admin Dashboard A basic admin dashboard is required for: * Merchants/Tenants * Mandates * Payment Links * QR Payments * Transactions * Success/Failed/Pending transactions * Webhook logs * Search by Order ID / Transaction ID / Mandate ID * Basic transaction reports ### Preferred Technology Backend: * Node.js + TypeScript OR Java Spring Boot Database: * PostgreSQL Preferred: * Redis * Queue/Background Workers * Docker * React/ Admin Panel We are open to alternative technology recommendations if properly justified. ### Security Requirements This is a FinTech/payment project, therefore security and code quality are very important. Developer must implement: * Secure API authentication * API key managem...

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    52 bids

    ENUM Agile is Open for New Projects & Technology Partnerships Looking for a reliable technology partner to turn your idea into a scalable, production-ready solution? ENUM Agile helps startups, SMBs, and enterprises design, build, modernize, and scale digital products. What We Can Help You Build Web & Enterprise Applications • Java / Spring Boot • Node.js / Nest JS • Angular / React • REST APIs & Microservices AI & Intelligent Applications • Generative AI & LLM applications • AI Agents & AI Automation • RAG & Semantic Search • AI-powered SaaS platforms • AI Chatbots & Assistants Cloud & Backend Engineering • AWS / Azure / GCP • Microservices & Distributed Systems • Cloud-native a...

    $10 / hr Average bid
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    Fix Play Console Key Mismatch
    3 days left
    Verified

    ...regenerating a new upload key, migrating to a new key signature, or starting a Play support request—so expert guidance is essential. What I need from you 1. Diagnose the precise cause of the mismatch and confirm whether the current Play App Signing option allows an upload-key reset in my circumstance. 2. Lead me through (or carry out) the chosen remedy—be that generating a new upload key with keytool/Java Keystore, preparing the Google-issued “reset” request, or any other viable route. 3. Deliver a signed .aab or clear step-by-step instructions so I can submit the next build without further signature errors. If tools like keytool, jarsigner, or Play Console’s “Reset upload key” flow are required, please be comfortable using them. ...

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    Mobile app needed in java, android studio with AI work from Pakistan or India new freealncer for some easy work

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    ...Prediction Bot” into a fully working Android app. The concept is simple: feed the app either live video or pre-recorded movement data of chickens near a roadway and have it predict if, when, and where a bird will step onto the road. The platform is strictly mobile and Android is the only operating system I need supported. Here’s what I expect: • A lightweight Android application (Kotlin or Java) with a clean UI that shows a camera preview or data feed and overlays the real-time prediction. • An on-device model—TensorFlow Lite, PyTorch Mobile, or a comparable framework—that can run offline and outputs a confidence score plus an ETA for the crossing. • A simple stats panel logging every prediction with time-stamp so I can review accur...

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    175 bids

    I need a lightweight vehicle-management tool focused squarely on load handling. The core requirement is accurate, real-time load weight tracking for ev...authentication so only authorized staff can add or edit entries. • Clear installation guide and commented source code. Acceptance criteria 1. Weight entry must save in under two seconds on a standard office network. 2. Database can be backed up and restored without data loss. 3. CSV export opens correctly in Excel with no formatting issues. Tech stack is up to you—common choices like .NET, Java, or Python with a lightweight SQL database are all acceptable—as long as it remains maintainable and license-free for production use. Let me know your proposed stack, a brief outline of milestones, and any clarifyin...

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    I'm looking for an experienced developer to enhance my existing Java Spring Boot microservices application hosted on AWS. Key tasks include: - Adding new features like: - User authentication - API integrations - Improving security Ideal Skills: - Core Java & Spring Boot - AWS experience - Microservices architecture - Strong focus on security Please provide relevant experience in your bids.

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    ## Job Title Android Java Developer – Facial Recognition API Migration & Liveness Integration ## Project Overview We have an existing Android application written in Java that currently uses Microsoft Azure Face API for facial-recognition-based attendance and related functions. We are developing our own self-hosted facial recognition API in Python, using technologies such as InsightFace / ArcFace, ONNX Runtime, FastAPI, and project-specific face repositories. We need an experienced Android Java developer to review the existing application, understand the current Azure Face API integration, and modify the application so it can work reliably with our new Python facial-recognition API. The work will be completed in two phases. ## Phase 1 – Replace Az...

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    ...free to integrate Firebase Cloud Messaging if it speeds things up; I just need the service to scale and to handle basic fail-over scenarios. At this stage I am not asking for full real-time map tracking or a user-login module, but I would like the architecture left open so we can slot those features in later without a rewrite. Deliverables • Android Studio project with clean, commented Kotlin or Java code • Signed release APK plus a debuggable build for testing • Documentation showing how to connect to my endpoint, trigger sample status changes, and publish the app to Google Play • Brief hand-off call or video walkthrough once everything passes review Acceptance criteria • Notification arrives within 5 seconds of the status change hitting the A...

    $27 / hr Average bid
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    79 bids

    ...that travel with the account across all rooms • “SVIP” premium tier: higher room‐joining limits, priority mic access, and a distinctive badge • “Seller” role: ability for approved users to flag a room as paid or to list digital goods/services directly in their profile (payment gateway integration can be stubbed for now) Tech expectations Develop in Android Studio with Kotlin (preferred) or Java, using clean MVVM architecture, Firebase or a similarly scalable real-time backend, and WebRTC or Agora for low-latency voice. Please include all project source, documented APIs, and a short setup guide so my in-house team can compile and test. Acceptance criteria 1. App installs and runs without crashes on Android 10+. 2. Gmail login completes...

    $270 Average bid
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    57 bids

    I’m looking for a developer who can build a lean, production-ready Android shopping app that does one thing exceptionally well: move users from “Add to Cart” straight through a secure checkout and payment gateway. Scope • Native Android build (Java or Kotlin) that runs smoothly on the current OS versions. • Core screens: simple product view (fed by my existing API), cart summary, shipping details, payment screen, and order confirmation. • Integrated payment gateway—Stripe is preferred, but I’m open to your recommendation as long as it supports major cards and works worldwide. • Guest checkout only; no user sign-up or login flows. • Clear error handling, validation, and success/fail callbacks so I can track each order&...

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    I’m building a web application and need a seasoned Java full-stack developer to work alongside me from backend through to the React UI. The help I’m after is truly end-to-end: designing or extending Java REST APIs, wiring them into responsive React components, and keeping everything clean, tested, and well-documented. You’ll jump between backend logic (Java 17, Spring Boot, JPA/Hibernate, Maven) and the React frontend depending on the task at hand, always with an eye on performance, security, and code quality. Unit and integration tests, pull-request reviews, and occasional CI/CD tweaks in GitHub Actions and Docker are part of the routine. Acceptance criteria for anything we merge are straightforward: • All automated tests pass and new code mee...

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    ...accept or decline, and both parties get confirmation inside the app. Although real-time tracking and payment integration are off the critical path for this first version, the codebase should be clean and modular so those features can be bolted on later—or even ported to iOS or Web without a full rewrite. Deliverables • Production-ready Android app (APK + Play Store-ready bundle) • Full Kotlin/Java source code in a Git repo with README setup instructions • Simple backend (Firebase, Supabase, or similar) handling user auth, ride data, and push notifications • Brief technical document outlining architecture, key libraries, and where future modules (tracking, payments) will plug in • One walk-through session to hand over the project and answer...

    $18 / hr Average bid
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    I have a fully-built mobile app in FlutterFlow that I’m now ready to take native. Your job is to reproduce the entire experience in Swift for iOS and Java for Android, matching the original design pixel-for-pixel, duplicating every feature, and retaining the same smooth performance—or improving it where possible. The current build works, but being tied to FlutterFlow limits my control over custom code and optimisation. I’ll provide the existing FlutterFlow project, Figma screens, backend endpoints, and a brief test plan so you can see what “identical” really means. Key expectations • UI/Design fidelity: layouts, colours, typography, animations, and any custom widgets must look and feel exactly the same on both native platforms. • Feature...

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    We have active requirements for production-grade software codebases for acquisition/licensing. :small_blue_diamond: Required Technology Stacks COBOL, Fortran, RPG .NET Framework / Legacy C# VB6 Java 7 & Earlier C / C++ Go, Rust, Ruby Swift, Kotlin :small_blue_diamond: Legacy Codebases We are looking for long-lived enterprise software with real development history, business logic, maintenance, PRs/issues, and testing activity. Preferred: Private repositories Multi-year/decade development history Enterprise/business-critical applications Legacy migration projects Production/deployed systems :small_blue_diamond: Automotive / Vehicle Codebases We are also looking for production-grade projects in: ECU / Firmware Telematics / Connected Vehicles Vehicle Security / Immobilizer Vehicl...

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    1- Task is to visit a Location: RS Dr. Asmir DKIT (Rumah Sakit Tk. IV 04.07.03 dr. Asmir), Jl. DR. Muwardi No.50, Kutowinangun Kidul, Tingkir, Salatiga City, Central Java 50711, Indonesia. physically and take atleast 10-15 geotagged photos of the name board of the institutes captured from outside the building and preferably inside too. Download app for geotagged pics from the link: 2- Get the verification forms filled, signed and stamped by the HR or relevant authority of these locations. 3- Get the details of verifier that is their name, designation, Department and Contact. 4- In case of refusal to fill form, take the written refusal statement with stamp or sign as a proof. If they don't give written, ask them that you want to record them saying their reason and take

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    2 bids

    ...deadline and need a dedicated backend developer who can dive straight into an existing production code-base and elevate it without breaking what already works. The current system is live; I’ll share full repository access, architecture diagrams, and a short feature backlog as soon as we kick off. Stack flexibility is important to me—whether you are most comfortable in Node.js, Python/Django, or Java/Spring, the goal is to improve reliability, speed, and maintainability. Here’s what I need from you right away: • Rapid familiarisation with the current architecture, followed by a concise assessment of performance bottlenecks and fragile areas. • Implementation of new endpoints and business logic, keeping coding standards high and documentation clear....

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    ...leaderboards that update automatically after each rated match. Google, Facebook, or email sign-in are all fine as long as accounts sync the friends list and ranking data. For networking and real-time state sync I am happy with Firebase, Photon, or another stable solution; choose whichever you are most comfortable optimising. Deliverables • Android Studio project with clean, well-commented Kotlin or Java code • 3-D assets for pieces and board (original or properly licensed) • Backend configuration/scripts for multiplayer, chat, rankings, and friends • Brief build & deployment guide so I can reproduce the release from scratch Acceptance criteria 1. Two players on different devices can finish a full game with no desyncs. 2. Chat messages appear instantly (...

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    Scrum Master Resume Writer
    1 day left
    Verified

    ...development and project delivery, now pivoting fully into servant-leadership. • Multiple successful project completions that shipped on schedule and within scope—metrics and stories are available for you to weave in. • Written client testimonials praising my sprint planning, impediment removal, and stakeholder communication. • A strong toolkit across Agile methodologies, technical expertise (Java, AWS, CI/CD), and hands-on team management. Your task resume that- 1. Targets recruiters at top Indian IT/Software firms. 2. Places Agile leadership and technical depth side-by-side for instant credibility. 3. Highlights the achievements and testimonials I provide so they read as proof, not fluff. I want clear, action-driven language (Scrum, Sprint,...

    $17 Average bid
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    10 bids

    ...latency, and system reliability. Handle complete app store submission prep and production server deployment. Technical Requirements: * Proven track record as a Full Stack Developer (both Web and Mobile). * Hands-on experience with API syndication, ad networks, and secure payment/monetization flows. * Strong proficiency in Rust, Node.js, or Python for backend, alongside React Native, Flutter, or Java for mobile. * Deep knowledge of relational and non-relational database architecture. * Excellent English communication skills for technical documentation and regular progress updates. Application & Screening Questions: When submitting your proposal, please answer the following questions: * What tech stack (frameworks/languages) do you propose for the Backend, Frontend, and M...

    $808 Average bid
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    321 bids

    ...enrichment and discovery services - Design systems for multi-modal data - Improve system performance, reliability, scalability, and security - Build asynchronous processing and background workflows - Integrate external APIs and data sources - Help migrate existing services and data pipelines with minimal downtime - Monitor, debug, and operate services in production Preferred technology - Golang or Java/Kotlin - Python or TypeScript is also valuable - PostgreSQL / MySQL - REST APIs - gRPC - Microservices - Kafka or similar streaming technologies - Google Cloud Platform (GCP) - AWS/Azure experience is also acceptable - Docker and Kubernetes - LLMs, RAG, AI agents, or agentic workflows What I am looking for The ideal engineer has experience building complex enterprise-grade back...

    $31 / hr Average bid
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    233 bids

    ...Pdf Flie Please Review & Share Your Work Link Listing Market Place link Android App ink Key points I need covered: • Web portal: clean UI for adding, editing, and browsing listings, plus the usual order flow and reports an admin would expect. • Role management: separate logins and capabilities for Admin, Seller, and Buyer, all controllable from the admin panel. • Android app: native code (Java or Kotlin) that mirrors the core buyer experience, supports user profiles, and delivers real-time push notifications for orders, messages, and system updates. • Shared database: a single MySQL schema so data stays perfectly in sync between web and mobile. Deliverables 1. Source code for the PHP portal and the Android app, both ready to compile or deploy...

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    $462 Avg Bid
    124 bids

    Dear Partner, We have active requirements for production-grade software codebases for acquisition/licensing. :small_blue_diamond: Required Technology Stacks • COBOL, Fortran, RPG. • .NET Framework / Legacy C#. • VB6. • Java 7 & Earlier. • C / C++. • Go, Rust, Ruby. • Swift, Kotlin. :small_blue_diamond: Legacy Codebases We are looking for long-lived enterprise software with real development history, business logic, maintenance, PRs/issues, and testing activity. Preferred: • Private repositories. • Multi-year/decade development history. • Enterprise/business-critical applications. • Legacy migration projects. • Production/deployed systems. :small_blue_diamond: Automotive / Vehicle Codebases We are also looking for produ...

    $7294 Average bid
    $7294 Avg Bid
    20 bids

    ...logged, real-time push notifications must alert relevant team members so nothing slips through the cracks. Because this will be used exclusively by trained security staff, the interface has to be fast, uncluttered, and usable with one hand—think large buttons, offline caching in spotty coverage areas, and a minimal number of taps to completion. Deliverables • Android Studio project (Kotlin or Java) with clean, well-commented code • Signed APK ready for internal testing and deployment • Implementation of: – Incident reporting form – Photo & video upload – Real-time notifications (Firebase Cloud Messaging or similar) • Brief set-up guide covering build steps and configuration of the notification service Th...

    $19 / hr Average bid
    $19 / hr Avg Bid
    174 bids

    ...clutter-free; think a single address/search bar, slim toolbar, and nothing that distracts from the page content. Although the interface must stay minimalist, I still want users to be able to tweak it—simple theme or accent-color switches, the ability to move or hide the toolbar, and a setting to choose the default search engine will be enough. Please build on standard Android WebView (Kotlin or Java in Android Studio) and keep the codebase well-commented. I will need: • Release-ready APK • Full source code with build instructions • A short README outlining how the incognito implementation works and which UI elements are customizable I’ll test by installing the APK on Android 10-14 devices and checking that no browsing data persists betwee...

    $34 Average bid
    $34 Avg Bid
    23 bids

    ...PM. The work centres on a large-scale web application already in production. Your day-to-day focus will be split between building new modules that the business team has specced out and keeping the current codebase healthy—refactoring, fixing bugs and making incremental performance gains. We run a lean stack, so deep knowledge of core PHP and core Java is more valuable to us than framework expertise; if you can read, write and optimise plain PHP/Java, you’ll fit right in. A typical week will involve: • Scoping and coding new features from user stories supplied by the product owner • Reviewing legacy code, identifying hot spots and patching them before they escalate • Committing well-documented code to our Git repo and walking the QA engine...

    $721 Average bid
    $721 Avg Bid
    57 bids

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