Spring Security Developers For Hire
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Sponsored Freelancers
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Hire johibkhan
10+ years building software at Avaya, Pramati, CGI, Yash, GMS, Vcentric, Meta-io, CTI Services and MMTex. Core strengths: problem-solving, algorithms, system design and high-performance, low-latency systems for real-time AI workloads, spanning AI and autonomous agents, cybersecurity, cloud and edge computing, IoT and...10+ years building software at Avaya, Pramati, CGI, Yash, GMS, Vcentric, Meta-io, CTI Services and MMTex. Core strengths: problem-solving, algorithms, system design and high-performance, low-latency systems for real-time AI workloads, spanning AI and autonomous agents, cybersecurity, cloud and edge computing, IoT and crypto. For 8+ years I've led teams delivering trading, fintech, SaaS, Agentic AI, automation and IoT platforms, with a focus on event-driven, cloud-native and distributed architecture. AI & Agents: LLM agents, multi-agent workflows, MCP, RAG, vector DBs, fine-tuning, NLP/sentiment, reinforcement learning, predictive analytics. Python, PyTorch, TensorFlow, Scikit-Learn, LangChain/LangGraph. Algo Trading: AI signal generation, market regime detection, alt-data, backtesting, walk-forward optimization, risk-based position sizing, FIX, WebSockets, tick data, L2 order books, OMS/EMS, smart order routing, VWAP/TWAP execution, PnL/drawdown limits, kill switches. Crypto & Web3: CEX/DEX trading bots, DeFi, arbitrage, on-chain analytics, smart contract integration, Web3.js. Cyber: Zero-trust, VAPT, secure SDLC, API/network/cloud security, secrets management, threat monitoring. Mobile ✅ Real-time trading & fintech apps with charts and alerts ✅ Flutter, React Native, Swift, Kotlin ✅ Secure APIs, CI/CD, monitoring, App Store / Play Store releases IoT & Edge Computing ✅ IoT dashboards, telemetry, device monitoring, real-time tracking ✅ Edge AI inference (ONNX, TensorRT, Jetson), sensor data processing ✅ MQTT, WebSockets, REST, serial, CAN/RS485, hardware-to-cloud integration Frameworks ✅ Spring, Django, FastAPI, Laravel, ASP.Net, Nest.js, Next.js, Nuxt.js, React, Vue, Angular Backend ✅ Python, Java, Go, Rust, C++, Node.js, PHP, Ruby ✅ Async systems, Kafka, Redis, message queues, stream processing Frontend ✅ TypeScript, JavaScript, React/Redux, Vue, Angular, SCSS, Webpack, performance tuning Data ✅ PostgreSQL, MySQL, Oracle, SQL Server, Cassandra, CouchDB ✅ Time-series & tick data: TimescaleDB, ClickHouse, InfluxDB ✅ Supabase, Firebase, Firestore Cloud 3.0, DevOps & Infra ✅ AWS, GCP, Azure, OpenStack, serverless, GPU compute ✅ Docker, Kubernetes, Terraform, Git, CI/CD, SonarQube, JMeter, Selenium ✅ Linux, Nginx, Apache, Tomcat, SSL, observability ✅ High availability, failover, auto-scaling Architecture ✅ Microservices, Event-Driven, Distributed, SOA Portfolio & Live Applications (GitHub: johibkhan2) ✅ DX26 Data Studio, open-source BI & data visualization: https://github.com/dx26-io/ ✅ Suspicious Object Detection, computer vision AI: https://github.com/johibkhan2/cautious-fortnight ✅ Bid Automation: https://github.com/johibkhan2/freelancer-bids-automation ✅ Moneybox Fintech (Laravel): https://github.com/Money-Box-Dev/api.moneybox.au Live Applications https://www.moneybox.au https://appwise.net.au/ https://pordoinspect.com/ https://serbob.com/ less -
Hire ShahinurMithun
Great Software Starts with the Right Questions. Let's Start There. We've delivered more than 500 successful projects for clients across nearly every continent. But what we're proudest of isn't the number—it's that many of our clients return to us for their next project. I'm Shahinur, Founder & CEO of OrFactor. Our...Great Software Starts with the Right Questions. Let's Start There. We've delivered more than 500 successful projects for clients across nearly every continent. But what we're proudest of isn't the number—it's that many of our clients return to us for their next project. I'm Shahinur, Founder & CEO of OrFactor. Our team of 70+ engineers designs and builds custom software, SaaS platforms, mobile applications, AI-powered solutions, and cloud infrastructure for startups, growing businesses, and enterprises. We don't simply build what we're asked to build. We challenge assumptions, identify risks early, and recommend better solutions whenever we believe they'll lead to a stronger product. Once we commit, we deliver. What We Build – Product strategy & technical architecture – Modern UI/UX design – Full-stack web & mobile development – API & third-party integrations – Cloud infrastructure & DevOps – AI agents & intelligent automation How We Work With You – Dedicated Project Manager – Daily progress updates – Complete source code ownership – Post-launch support & long-term maintenance Technologies We Work With Frontend: React • Next.js • Angular • Vue.js • TypeScript • Tailwind CSS Backend: Node.js • Java (Spring Boot) • PHP (Laravel) • Python (Django) • .NET Core • Ruby on Rails • Perl Mobile: Flutter • React Native • Swift • Kotlin Databases: PostgreSQL • MySQL • MongoDB • Redis • Firebase Cloud & DevOps: AWS • Microsoft Azure • Google Cloud • Docker • Kubernetes AI & Intelligent Automation: OpenAI • Claude • OpenAI Agents SDK • LangGraph • CrewAI • TensorFlow Whether you're launching an MVP, modernizing a legacy platform, or building a large-scale enterprise solution, our focus is the same: delivering software that is reliable, scalable, and built to last. If you're looking for a development partner who values long-term success over short-term sales, we'd be happy to discuss your project—even if that means recommending a simpler solution than you expected. less -
Hire MohammadJuned27
At InnoForge Technologies, we turn early-stage ideas into working software — for startups, founders, and growing businesses. Our focus is building smart, connected systems: platforms that think, apps that scale, and processes that run themselves. We design and ship AI-integrated products, cross-platform mobile apps,...At InnoForge Technologies, we turn early-stage ideas into working software — for startups, founders, and growing businesses. Our focus is building smart, connected systems: platforms that think, apps that scale, and processes that run themselves. We design and ship AI-integrated products, cross-platform mobile apps, and web solutions — taking projects from first prototype to a stable, enterprise-ready release. What we bring to the table: Intelligent process design using n8n, OpenAI, and Gemini APIs Solid backend engineering with Spring Boot, Node.js, and REST APIs Cloud infrastructure - Docker, Google Cloud, Firebase, CI/CD Mobile builds in React Native, Flutter, for Android & iOS Web builds in React.js and Next.js Interface design in Figma & Canva We handle the full arc of a product - strategy, design, build, deployment, and the maintenance that keeps it running - so what you launch keeps working long after day one. less -
Hire iosifpeterfi
CompTIA Security+ and Microsoft MCSE/MCSA/MCITP certified, with 15+ years of experience, 100+ delivered projects, and a 4.9 Freelancer rating across 101 reviews. I help businesses build, improve, and maintain software and infrastructure they can rely on. Clients usually come to me when they need someone who can take...CompTIA Security+ and Microsoft MCSE/MCSA/MCITP certified, with 15+ years of experience, 100+ delivered projects, and a 4.9 Freelancer rating across 101 reviews. I help businesses build, improve, and maintain software and infrastructure they can rely on. Clients usually come to me when they need someone who can take ownership—not just complete isolated technical tasks. I help launch new platforms, modernize existing systems, improve reliability and performance, automate operations, and solve problems that are slowing the business down. My focus is always the outcome: stable systems, smoother operations, less downtime, easier maintenance, and a setup that can grow with the business. I'm based in Germany and communicate fluently in English (C2), German (C1), and Romanian (native). I also operate my own hosting infrastructure, which can be useful for development, staging, testing, and deployment when a project needs it. You can expect clear communication, realistic commitments, and dependable follow-through. I'm also available after delivery for ongoing development, maintenance, monitoring, improvements, and long-term technical support. If you need someone experienced who can take responsibility for the technical side and stay involved long-term, I'd be glad to help. less -
Hire adi30102000
I build and ship complete products: web app, mobile app, backend, admin panel, deployment. Recently delivered, all live and in use: • A multi-tenant contract and document management platform used by teams worldwide • A real-time social app for the UK market (live chat, presence, moderation) • A family...I build and ship complete products: web app, mobile app, backend, admin panel, deployment. Recently delivered, all live and in use: • A multi-tenant contract and document management platform used by teams worldwide • A real-time social app for the UK market (live chat, presence, moderation) • A family financial-planning platform for India with its own CRM and content system • An ongoing CRM, website and content-automation engagement for a construction company How I work • Clear scope and fixed milestones before any code • A working demo every week, not just status updates • You get full source code, a Git repository, setup docs and a handover walkthrough • 30 days of bug fixes after delivery Stack: Next.js, React, Spring Boot (Java), PostgreSQL, Redis, Flutter, Kotlin (Jetpack Compose). Tell me what you're building and your deadline. I'll reply with a scoped plan, not a template. less -
Hire nagarajut1
IT Professional Enterprise Solution Delivery Solution Architect-Design System-Development-Continuous IntegrationIT Professional Enterprise Solution Delivery Solution Architect-Design System-Development-Continuous Integration less -
Hire itsAhesan
I build production REST APIs in Java + Spring Boot every working day — and I bring the same standard to freelance work: reviewed code, tested endpoints, clean handover your next developer can read without a headache. I'm a Java backend developer at a software development center in Bangalore, with about 1.5 years of...I build production REST APIs in Java + Spring Boot every working day — and I bring the same standard to freelance work: reviewed code, tested endpoints, clean handover your next developer can read without a headache. I'm a Java backend developer at a software development center in Bangalore, with about 1.5 years of hands-on experience on real projects — Agile sprints, code reviews, real deployments. New to Freelancer, not new to shipping. WHAT I CAN BUILD FOR YOU • REST APIs with Spring Boot — layered architecture, request validation, proper error handling, documented and tested in Postman • Authentication done properly — Spring Security with JWT tokens and role-based access control • MySQL with JPA/Hibernate — schema design, plus fixing slow queries, N+1 problems, and missing indexes • AWS S3 integration — file upload/download so storage scales with your app • Clean Git workflow, Maven/Gradle builds, deployment support HOW I WORK • Every endpoint ships with a Postman collection, so you can verify it yourself before releasing a milestone • Clear daily updates in plain English — you always know where your project stands • Honest scoping — I only take projects I know I can deliver, quote realistic timelines, and tell you upfront if something is outside my depth My rate is deliberately low while I earn my first reviews here: day-job production quality at a newcomer price. Message me with what you're building — you'll get questions, a concrete plan, and a milestone breakdown the same day. less -
Hire emilesd617
Hello, I can start immediately and can dedicate to your project full-time, 40+ hrs/week during your working time. I've 8+ years of experiences and specialized in C#, VB, .Net, Devexpress, JavaScript, Node.js, React, Next.js, Mobx, GraphQL, Neo4j, Tailwind CSS, SCSS, GPT, TypeScript, API integration, etc. I'm an...Hello, I can start immediately and can dedicate to your project full-time, 40+ hrs/week during your working time. I've 8+ years of experiences and specialized in C#, VB, .Net, Devexpress, JavaScript, Node.js, React, Next.js, Mobx, GraphQL, Neo4j, Tailwind CSS, SCSS, GPT, TypeScript, API integration, etc. I'm an excellent English speaker/communicator with good collaboration experience. Looking forward to discussing more details. Best regards. Emile. less -
Hire giaphung2k1
🏆 TOP 10 WEB DEVELOPER IN VIETNAM | 1,000+ PROJECTS | 240+ FIVE-STAR REVIEWS Whether you are a new business looking to attract your very first customers, or an established brand with a slow, outdated site—I am here to help. I engineer high-converting, custom websites from scratch designed to drive growth and maximize...🏆 TOP 10 WEB DEVELOPER IN VIETNAM | 1,000+ PROJECTS | 240+ FIVE-STAR REVIEWS Whether you are a new business looking to attract your very first customers, or an established brand with a slow, outdated site—I am here to help. I engineer high-converting, custom websites from scratch designed to drive growth and maximize customer acquisition. What I deliver: • Startup & Enterprise Solutions: Built from scratch to launch & scale your business. • Custom Web Development (Laravel, React, Vue, WordPress) • Speed, SEO & UI/UX Optimization 📬 Ready to grow your customer base? Contact me now! less
