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    421,721 back end developer jobs found, pricing in USD

    i am using porto theme n i need very small changes here in home page these are just basic thigs if u good n u can start pls bid.

    $10 - $31
    Sealed
    $10 - $31
    9 bids
    PHP Laravel Developer 6 days left
    VERIFIED

    need a functionality of Frame on an existing web, example attached pre designed image (2) will be added in Admin User can choose his/her own image from Gallery/Camera and Name will be captured from User profile. final image (3) can be downloaded / shared on Social Media (Facebook, Instagram, Twitter, Whatsapp etc) Multiple such Frames can be there on same page, different design. Delivery needed by Friday 10 December 2021.

    $119 (Avg Bid)
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    We are looking for a Full-Time (30 to 40+ hours a week) Front End Developer Freelancer with 2+ years of experience and strong knowledge of Ionic, Ionic Native, Angular, CSS, HTML, SCSS, JSON, CRUD. Developers have to follow workflow and project guidelines. We will be tracking updates through JIRA, Slack etc. Daily work/project updates will be required by end of the day.

    $1 - $5 / hr
    $1 - $5 / hr
    0 bids

    Only bid if you are the developer. We do not want to talk to any project managers. Add a paid transaction to wordpress site, https://losangelesjournal.com. Add Stripe transaction, Adjust the flows to: 1) Pay for post 2) Upload post, edit post, submit post 3) Approval for post by editor 4) Post shared Budget $30-200

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    I have a Laravel project

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    3 bids

    **Freelancers Only** We need a freelancer to join us urgently to jump on a project. We are working on a casino slots & card game. Our developer had to take a sudden leave of absence due to a family emergency and we need a developer to continue the work. The code already exist but it is messy and has bugs. Needs to be made into a tidy and good quality code and have annotations and user guide. Contact us for additional information. **You will be required to sign an NDA**

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    Only bid if you are a developer. Communication only with developer directly. Design is already provided. Upgrade the site to show well on mobile and desktop. Old website New website Milestones 1) Identify all current bugs. Improve load time. 10% 2) Make site mobile version works well 20% 3) Finish entire site map of webpages 30% 4) Replace old website with new website 50% If you do this project well, I may have other work for you too. Expected time to work on this, less than 1 week. On the first day we should see results. You will be given a sandbox URL to work on at first. Budget $30-150

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    We are looking for developer who can create a utility which post ads in multiple group and group member personally.

    $75 (Avg Bid)
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    6 bids

    Looking for a developer who can develop tool or utility which will download videos from a highly secured website can discuss details in chat.

    $178 (Avg Bid)
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    we are running spear parts for automotive and we are looking to find a developer who can help us set up our Shopify store with all channels and develop our Facebook account.

    $290 (Avg Bid)
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    18 bids

    We have an Excel spreadsheet that has a XML generator embeded in it. The XML file that is created is not being accepted when uploaded on the required portal.

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    We are seeking a Senior Java Developer to become an integral part of our client's team! You will be responsible for creating and modifying computer application software or specialized utility programs. You must be available to join in Chicago or Atlanta or New York (multiple roles). This is not a fully remote position as we will need you to be available onsite when required. Qualifications: Highly energetic candidate with 8+ years of work experience in IT industry. Able to work independently. Must have programming experience with Core Java 8, XML and Web Services. Strong hand on experience of Spring Framework & Spring Boot Application, Micro services, Spring Boot, Web services based on SOAP/REST Strong hand on experience on UI Angular 2+. Strong experience in SQL querie...

    $50 - $90 / hr
    $50 - $90 / hr
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    We are searching developers for mobile app, also Android and IOS. We are defining with internal team UI/UX design. We also have backend implementation. We only need for this project frontend development.

    $20 / hr (Avg Bid)
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    Django Developer 6 days left

    I am looking for django developer

    $216 (Avg Bid)
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    15 bids

    We are looking to hire an highly experience iOS developer to work on some of our ongoing and future projects and would like to get to know the developer and capabilities to assign the work. Here is what we are looking for in the iOS developer: • Must have experience with MVC code structure and maintain code quality. • Must have knowledge of swift programming language more than 4 years. • Should able to maintain all iPhone device design and iOS compatibility. • Must have knowledge of video/audio player integration which having forward-backward duration , subtitle , different resolution quality setting over connectivity , Lock Screen notification , PIP mode setting functionalities. • Must have knowledge of background processing , thread ma...

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    Build Website 6 days left

    ...players will fill out prior to tournament start, and also have optional betting aspect to it. (Not real money) but betting against spread for points. Player with most Bracket and Betting points Combined wins pool. Users will have choice to join a existing pool (if the have password) or Create their own pool. Will change a fee (tbd) to use the site/service. Website will need MySQL database on backend to run all pool and all administrative data. There will be limited pool options so pool admins can customize their pool to some degree. Some pools may just be traditional bracket only pools. Some will have betting option. Pool admins can customize points per round as well and max bet amount per round too (if they elect to use betting option) will also have optional lower seed bon...

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    Need SRE developer -- 3 6 days left
    VERIFIED

    Project info ======== As an SRE engineer, I want to develop a common standard logging framework, so that all applications will use this as part of application log standardization. Notes: A suggested method of this is to leverage Mapped Diagnostic Context (MDC). MDC provides a way to enrich log messages wit...can be integrated with log4j or slf4j. Acceptance Criteria A framework is available that includes all required common logging fields in all log messages generated by applications. The fields include trace Id and span Id The log messages should be written out using structured log format, JSON Log messages must be easily integrated with Datadog ============= Need a developer who can deliver this. Please bid only when you can deliver this. Don...

    $25 - $50 / hr
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    we need a Proffessional Wordpress Developer to Joint our team for a very gib project freelancer must be able to done custom cossing , we don't install and use plugins for functioanly , also he must be professional on php , css and js and wordpress codding

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    Problem: Node.js server with an API that can compute the top N most frequent (not case sensitive) words in a text file. The API must meet the following specifications: Inputs: The API must be able to accept a (potentially large) text file and an arbitrary integer N. The inputs will have the following constraints: * file content will be at maximum 1gb of text content - we will be testing your solution with large files up to this limit * file content will always be utf8 * n can be any positive integer in the following range: [1, K] where K is the number of unique words in the text file Outputs: The API is expected to return the top N most frequent words in the text file as JSON. Output: we expect the API to return the following JSON response: ``` { "frequencies": [ ...

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    Have experience with Discord and Discord.js. Understand and work with a NodeJS codebase of more than 20.000 lines. Do bug fixes and maintain the bots across all platforms. Assist with setup procedures & ease deployment process. Create documentations & visual UML diagrams of workflows. Work with a remote team across the world, options for allocations possible. Skills required: Node.js or Python; REST; PHP; JavaScript; API interaction Database Implementation Twitter Web Scraping

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    I need a developer who is expert on wordpress. More details will be explained via chat with candidate developer Please only expert on the wp

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    I have an existing site: , that I'd like to have ref...1) landing page, 2) "geek app" which is a react.js app, 3) store which is hosted by shopify 4) cheat sheets which explains my primary custom product and finally 5) a hosted blog using blogetc (if you know of a better php based blog engine, let me know!) Also note that I have explainer videos for 1 2 and 4 that need to be included in the design. They are in 16:9 format. If you're curious, the backend is laravel. The deliverable is a mockup of pages 1, 2 and 4 for both the desktop and a version for mobile (in portrait). Make sure the design across these three pages are consistent with one another. If you happen to be familiar with react.js and laravel, let me know. That's what the design will be impleme...

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    I need a good WordPress developer who can start immediately. its simple 5 pages website we will just use theme n create pages n done

    $9 - $20
    Sealed
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    15 bids

    My website is hosted in AWS I want to change phone number on that 4 html page.

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    I'm a game developer. I want an Ethereum API that will be used in my game backend engine. e.g ) - * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * -- * - * - * - ========================= before ========================= A user ( have $ 10,000 ) B user ( have $ 20,000 ) ========================= ( Action ) A user -> send $ 1,000 -> B user ========================= After ========================= A user ( have $ 9,000 ) B user ( have $ 21,000 ) ========================= This process can be implemented in the game as follows. type 1) send_money @my_session, @target_session, 1000; type 2) if(get_money(@my_session) > 1000) { del_money @my_session, get_money(@my_se...

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    Hello, I need a very high performance website in PHP, in terms of SEO and speed. It has to be a “monster” of performance. Attached you can find frontend already made. No CMS needed. You need to create a MySQL database that will be connected to the frontend. Database will be populated with data fetched with this simple API: If you read everything write in your offer “Dove Guardare”. Thanks a lot for your interest.

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    I need a good WordPress developer who can start immediately. its simple 5 pages website we will just use theme n create pages n done

    $7 - $21
    Sealed
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    I need a developer to integrate my online stock into selling platform.

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    UpThink Website 6 days left

    Its basically a website for medical representative where they will wish doctors for various occasions. Currently full backend and frontend is ready. You only need to connect both frontend and backend.

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    Looking for App Developer who can Create Local Delivery App like Wefast

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    I have 2 App 1. Quiz app with admin panel 2. File Lock Flutter App 1. I want to take my quiz app a system so that I can control from the admin panel from which countries my app can log in. The country I will select from the admin panel will be able to log in from that country, but will not be able to login to my quiz app from any other country. And quiz app 1. Logo change 2. Flash screen change 3. App name change 4. App package name change 5. Admob 6. Onesignal 7. Fire base Flutter App 2. File Locker App needs to be installed. If there is any problem with the features that the file locker app has, it should be fixed. File Locker Google AdMob Ad Network needs to be integrated. Flutter File Locker App Documentation Please understand the work in a good way and send the proposal.

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    Web Developer - Junior+ level 6 days left
    VERIFIED

    I am looking to hire a junior level web developer for a personal project. Most of all tasks are related to review functionalities and providing suggestions to make it improved. Mainly, PHP, HTML and CSS. I need him/her to work 10hrs/month at least. Thank you

    $37 / hr (Avg Bid)
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    Looking for a web developer to help me code our production environment backend. I am not fully versed in the languages so require assistance in building it faster. This will be ongoing work with possible pauses in between. The structure and logic is almost complete. Your role will be to write code with proper commenting and explain it when asked. This would be an easy task for someone with knowledge in html/php/js/jquery/ajax. It is basically building a webpage using AJAX that fetches/updates data from mariadb. Being able to communicate properly in English or French is very important.

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    EXPERIENCED designer wanted. Must be very good with CSS, HTML, PHP and WP theme building. We have a custom design, created in Figma. In total we have around 20 individual pages that need to be implemented. Most page blocks are repeated over different pages with different content. Mobile responsive quality is highly important. New theme should be based on Hello from Elementor. Google Pagespeed Insights score needs to be 9+ on both desktop and mobile. Examples of the pages and details: a) b) c) d) e) Pages with dynamic content should be implemented as page-templates, individual .php template file for each page. Pages with static and generic content should be implemented as blocks with Elementor ( ) so to make it easy to edit and manage in the future. Global CSS should be used in...

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    So let me tell you what I need :) I need a sports facility booking website that has a front end where you can choose your city, sport and date and then be shown all the pitches that match the criteria. From then on you can choose one go onto its " profile " and choose an available time to book it. No payment is necessary here. It will also need to have a backend where businesses can see when they are booked, by who, set the prices and manually add reservations if needed. I will disregard anybody who does not start their BID with the word Banana! For some inspiration I want something similar to Thank you for reading, happy bidding and do not forget the word :)!

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    Need a python API developer who can design backend and services for a website.

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    django backend -- 4 6 days left
    VERIFIED

    I have a Django CMS project that will allow users to automatically generate dynamic land... The content of the landing pages will be created using the variables from and CSV file and images from the image folder, which the user will need to add to the template form. When a landing page is created, we will generate XML files for the landing page URLs. We will use postgresql for db, digitalocean droplet for deployment, stripe for plans, and mailersend for SMTP. It’s a backend only, I’m a frontend developer & the UI is fully ready. my budget is $70USD, I can award you the project, but milestones will only be released upon the delivery of the project. I cannot release milestones just because you completed some tasks. If I do, the project may be abandoned and I w...

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    Looking for Unity or Unreal Developer for creating an airplane simulation program. Hi, I am looking for a Unreal or Unity developer to create a flying simulation experience for c-17 globe master airplane. My goal is to train people to learn how to avert crashing or flying incidents also to make sure they understand how to properly take or and land the aircraft. My users will be using HTC VIVE VR headsets to go through the training program. If you have any experience in developing simulation program in either Unity or Unreal, please show send me some relevant experience. Thanks!

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    Looking for a developer/designer for micro project. We are looking to add a drop down in the header of a webpage that shows a list of four services, when one of the services is selected in the dropdown, the user is directed to the Service page and the section they clicked on(see attached for more clarification). We also need the mobile header reworked to be more user friendly, maybe a hamburger menu.

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    I need a backend developer and api developer (can be the same person) to develop the api and backend for a social media style business network. We're looking to integrate this with AWS and the services provided within there.

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    I have a site which is fully integrated with The helpdesk of cleancloud can be I...front end. The subscription functionality is already provide by CleanCloud API 4. Right now when user signs in, the menu does not appear. It looks like the site is not working. It looks like there is something bad with redirects URL or something. Also when user click sign out nothing happens 5. Make sure that everything works in Front End (You can see the products administered in CleanCloud backend), registration, sign in payments etc 6. Create graphics (give us editable) for future app that will be created using appmysite i. Onboarding screens that goes with our brand identity ii. Splash windows

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    Web3 smart contract developer for ethereum nft project Prerequisite Experience: * Experience developing for multiple past NFT projects on Ethereum * Integration with wallets, ipfs, marketplaces * Experience defending attacks, coding with a nuanced eye for what areas have been exploitable in other projects and ability to write code that is watertight and will be audited prior to launch * Experience troubleshooting issues on the fly and being able to walk through examples of things encountered and overcome from prior projects * Must possess knowledge and ability to effectively communicate an understanding of all the steps and proper sequence from development perspective for taking a nft project from inception to post-launch and what things need to be accomplished

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    Web3 smart contract developer for ethereum nft project Prerequisite Experience: * Experience developing for multiple past NFT projects on Ethereum * Integration with wallets, ipfs, marketplaces * Experience defending attacks, coding with a nuanced eye for what areas have been exploitable in other projects and ability to write code that is watertight and will be audited prior to launch * Experience troubleshooting issues on the fly and being able to walk through examples of things encountered and overcome from prior projects * Must possess knowledge and ability to effectively communicate an understanding of all the steps and proper sequence from development perspective for taking a nft project from inception to post-launch and what things need to be accomplished

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    applying api to swift project 6 days left
    VERIFIED

    Hi I have fixed 4 api issues currently on my app but I need a swift developer to integrate the api fixes from the backend (php/laravel) to the iOS app (swift)

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    3+ years working as a Software Engineer Expertise in an object oriented language such as Java or Python Experience in building high-performance, highly-available and scalable systems Strong understanding of OOP (Java, Python or similar), Web Services (REST), front-end (React, core Javascript), SQL Deep understanding of web technologies Knowledge of the software development life cycle like coding standards, code reviews, source code management, build processes, testing, and operations Experience with AWS or other cloud technologies is preferred Experience in the digital advertising space (SSP, DSP, ad server, or audience data products) is a plus Excellent communication skills Comfortable working in a fast-paced and dynamic work environment How you’ll succeed: We are looking for high ...

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    We are a new b2b platform and we are using a SaaS software called Shuup eCommerce platform, Shuup is similar to Shopify. We need someone who has experience with the shuup dashboard to do the following: - Create the category home page which includes the categories list and the product listing page), and add the required plugins like (Best selling products) and other plugins on the category homepage. - Create the shipment (Manual Shipment) - Adjusting the product page and adding attributes and other information related to the product. - Create product categories, and upload the products list to the platform using an excel sheet. - Adjusting the fonts, color, and text positions, and some more items to be created by using the dashboard. the SaaS platform uses HTML/CSS/JS to adjust the page&...

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    AWS Configuration 6 days left
    VERIFIED

    I would like a certified AWS engineer to configure my app backend to AWS.

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    Angular Saas Admin Panel 6 days left
    VERIFIED

    Convert Theme to fully functioning admin panel using angular and node.js backend. Will purchase theme based on winning candidates' input. Required features. Analytics Dashboard - Generic POC Notifications Messages Tickets Calendar Table View | Details | Edit - Example Kanban Auth - Login | Register | Forgot Password User Profile Settings Page

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    Hi All, I am looking for the below resources for 6 month or even more. Apply only those who match the requirement. 1. Blockchain / token economics lead. At least 5 years of professional experience with understanding of setup for a crypto economy, experience building open-source blockchain products, and managing a blockchain developer. Experience with setting up token launch (fair launch) and working within L1 ecosystems.. 2. Blockchain developer. Reporting to blockchain lead, at least 3 years of professional experience with experience with rapid, iterative product development on open-source blockchains. Experience with token-related projects. Ethereum is a plus. ( Note : Only Individuals please. Agency are welcome who are ready to work with mentioned budget only) ( We ...

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    Expert Unbounce developer 6 days left
    VERIFIED

    I am looking for someone to help uplevel our Unbounce Landing page and help create new high-performing direct response landing page. Our marketing goal it to generate leads.

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