Hire the best API Developers in Chicago, IL

Check out API Developers in Chicago, IL with the skills you need for your next job.
  • $35 hourly
    Greetings! I’m a qualified Full Stack Developer with a can-do business mindset. I have been providing high-quality services to my clients for 5 years in different niches such as Real Estate, Healthcare, Manufacturing, Information Technology (IT), Automotive and Food services. You must be wondering why should you hire me? So, here’s why! • I value my work which makes me value my clients in providing them high-quality professional & 100% satisfactory work. • My work ethics demand me to provide delivery on time to you. • I assure 100% money back guarantee if my work is not up to the mark. And as for my projects, I have been on board with clients on projects like E-commerce, UI/UX for Mobile and Web, CMS, and CRM Systems. In fact, in website development, I am skilled at; • Wordpress Development • E-commerce Development • Static Website Design & Development • Php and Custom Php Development • Magento Website • .Net Framework • Laravel • Drupal • Shopify I also provide my services in Mobile App/Games Design and Development such as, • IOS • Android
    vsuc_fltilesrefresh_TrophyIcon API Development
    ERP Software
    CRM Development
    Web Application
    PSD to WordPress
    Magento
    React Native
    Java
    JavaScript
    WordPress
    Webflow
    ASP.NET MVC
    Shopify
    Mobile App Development
  • $95 hourly
    I'm a certified solutions architect for Amazon Web Services with experience in full-stack software development. My typical stack for web development is a React.js front-end paired with a node.js backend hosted on AWS. For mobile development my preferred stack is React-Native but I have experience in native development with Swift for iOS and native Android development in Java. I'd love to help your project at any stage, whether it's UX design, software development, API integration, data migration, or even just bug fixes & documentation. Whether you've got a new idea for an app or need a consult for a redesign on one of your micro-service containers, let me know how I can assist!
    vsuc_fltilesrefresh_TrophyIcon API Development
    Blockchain Development
    Software Architecture & Design
    Ethereum
    App Development
    CI/CD
    Serverless Stack
    DevOps
    Firebase
    Amazon Web Services
    React Native
    Database
    React
    TypeScript
    JavaScript
  • $40 hourly
    My name is Colin Daniels. I'm a Chicago-based Full Stack Web and Software Developer with 4+ years of experience. Adept in utilizing modern software and frameworks. Proficient in creating visually stunning web applications from scratch as well as creating professional API's used today by hundreds of companies. At eCommet LLC, I created an eCommerce application from the ground up. A few tasks I accomplished were:    • Using UX principles to create a case study    • Implementing the design in modern UI & visually stunning CSS and framework components    • Creating an admin page to track shipments, inventory and site analytics    • Maximizing the performance of the site to become interactive in less than 2 seconds upon first load    • Using testing tools such as Cypress to test and ensure consistent uptime    • Creating secure authentication utilizing JWT tokens and cryptography for user accounts    • Creating algorithms based on live sales data to generate expected sales reports. (If you'd like to see the final product let me know). I also have extensive experience with creating API's and NodeJS. I created an API that would scrape ebay.com and gather data based on a search query and return data such as the average selling price of the query along with data about each individual item. This API handles over 100,000 requests a day and is utilized by over 100 companies. My skills include but are not limited to: • HTML/CSS (4 years) • Vue.js (4 years) • Figma (2 years) • Node.js (4 years) • Python (5 years) • Web Scraping (4 years) • API Interactions (4 years) • Git (5 years) • JavaScript (4 years) • MongoDB (4 years) • UX & UI (3 years) • React (1 year) • Angular (1 year) • Cypress (1 year) • Express.js (4 years) • SQL (2 years) If you have any questions at anything you can message me at any time. Thank you for your consideration, Colin Daniels.
    vsuc_fltilesrefresh_TrophyIcon API Development
    UX & UI
    React
    Web Scraping
    Figma
    JavaScript
    HTML
    Node.js
    Git
    MongoDB
    CSS
    Vue.js
    SQL
    Python
  • $50 hourly
    I am a full stack developer with professional experiences building enterprise applications for a large financial institution as well as a small crypto start up. I enjoy learning new things and figuring out simple solutions to complex problems. - Will communicate regularly with you on the progress of work from start to finish so you will not have to guess on how things are going - Language agnostic but am most comfortable in Golang for backend development and various javascript libraries for the front end - Writing well documented, tested code is something that is very important to me
    vsuc_fltilesrefresh_TrophyIcon API Development
    Agile Software Development
    Data Structures
    Software Debugging
    JavaScript
    Ethereum
    Blockchain
    Engineering & Architecture
    Blockchain Architecture
    Golang
    Docker
    RESTful API
  • $70 hourly
    I want help developer first companies build awesome documentation. I am the founder at Dev-Docs, which will be a platform to make docs painless, but also help folks build it as well.
    vsuc_fltilesrefresh_TrophyIcon API Development
    HTML
    JavaScript
    Cloud Computing
    CSS 3
    API
  • $60 hourly
    ""Emin went above and beyond to not only complete the task but did it in such a professional way it blew me away." - Chris G from Techware Pro
    vsuc_fltilesrefresh_TrophyIcon API Development
    Search Engine Optimization
    Real Estate Lead Generation
    WordPress Plugin
    PHP
    WordPress
    Real Estate IDX
    Web Development
  • $55 hourly
    𝗪𝗘𝗟𝗖𝗢𝗠𝗘🙌 I'm a software engineer with more than 𝟖+ years of experience in Python. I have a proven track record of delivering scalable solutions using Django, Flask, and FastAPI frameworks. ⬇️Let's discuss how I can assist you with your project⬇️ 𝗠𝗬 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 𝗣𝗥𝗢𝗖𝗘𝗦𝗦 🔹𝙍𝙚𝙦𝙪𝙞𝙧𝙚𝙢𝙚𝙣𝙩 𝘼𝙣𝙖𝙡𝙮𝙨𝙞𝙨. I thoroughly analyze the technical assignment or task, seeking clarification for any ambiguous aspects. For larger assignments, I break them down into tasks and further into subtasks. 🔹𝙎𝙤𝙡𝙪𝙩𝙞𝙤𝙣 𝘿𝙚𝙨𝙞𝙜𝙣. I devise an implementation plan, creating a new git repository or cloning an existing one. Each task has its own branch. If time allows or if the task requires it, I write tests. 🔹𝙄𝙢𝙥𝙡𝙚𝙢𝙚𝙣𝙩𝙖𝙩𝙞𝙤𝙣. I start by developing a minimum viable prototype and then proceed with refactoring. I ensure that the code meets the specified requirements, such as speed or database query optimization. If needed, I perform additional refactoring. Once complete, I run the tests and either merge the changes to the main branch or create a pull request if I lack repository admin privileges. 🔹𝙏𝙚𝙨𝙩𝙞𝙣𝙜. Depending on the pipeline in use, the changes are typically transferred from the development branch to the test branch, where QA engineers evaluate them. If everything is satisfactory, I create a controlled backup of the production environment and introduce the new version. ✅ 𝗪𝗛𝗬 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘? ✔ Extensive experience developing scalable web applications across diverse industries. ✔ Expertise in Python, Django, and Databases. ✔ In-depth understanding of industry-specific challenges and solutions. ✔ Proven ability to tackle complex technical problems effectively. ✔ Proficient in utilizing AWS, Google Cloud, and Microsoft Azure cloud-based services. ✔ Committed to delivering exceptional results and ensuring client satisfaction. ✔ Strong advocate for open and transparent communication. ✔ Efficient project management skills, ensuring timely delivery. ✔ Reliable and skilled partner dedicated to bringing your vision to life. 🛠 𝗦𝗞𝗜𝗟𝗟𝗦 🔸𝗖𝗼𝗿𝗲. Python, Django, Flask 🔸𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲𝘀. MySQL, PostgreSQL, SQLAlchemy, pyodbc 🔸𝗡𝗼-𝗦𝗤𝗟. MongoDB, Redis, ElasticSearch 🔸𝗖𝗹𝗼𝘂𝗱. AWS EC2, S3, SES, Route 53 🔸𝗔𝗣𝗜. REST API, Django REST Framework, FastAPI ▶️Click the Invite button on my profile to get started on your project right away!
    vsuc_fltilesrefresh_TrophyIcon API Development
    MariaDB
    PostgreSQL
    MySQL
    SQL
    Database Design
    Django
    RESTful API
    FastAPI
    Flask
    Python
  • $60 hourly
    I'm a freelance developer with experience in supporting small businesses and non-profits with full-stack web development and system administration. I contribute to open-source projects and Linux software packages, as well as study low-level system design and programming language development. I can help you build websites and webapps, administer Linux servers, and develop custom IoT solutions - or anything in between!
    vsuc_fltilesrefresh_TrophyIcon API Development
    System Programming
    Amazon EC2
    CSS 3
    Amazon S3
    Unix Shell
    Golang
    Software
    Bash Programming
    Software Architecture & Design
    Unix System Administration
    HTML5
    Web Development
    Software Debugging
    Python
  • $99 hourly
    Over 15 years of experience designing, developing, testing, and implementing custom software solutions. Extensive knowledge of the Microsoft .NET platform. Built solutions for organizations in finance, education, manufacturing, technology services, and professional services industries as well as full life-cycle product development for Microsoft on the .NET languages team. Adept at gathering requirements, analyzing business scenarios, user interaction design, and application life-cycle management. Deep technical acumen, an aptitude for learning, and excellent verbal and written communication skills. Specialties: Domain Layer/API Design, User Interaction Design
    vsuc_fltilesrefresh_TrophyIcon API Development
    .NET Core
    .NET Framework
    C#
    Visual Basic
    Software Architecture & Design
    VB.NET
    .NET Stack
    Visual Basic for Applications
    Program Management
    Microsoft SQL Server
    Microsoft Azure
    Product Management
    Project Management
  • $60 hourly
    Developer with experience as a research and teaching assistant, software engineer, and small business owner. Ability to provide leadership and formulate business and technical solutions. Solid computer science foundation with competencies in algorithms, data structures, and scientific analysis. Strong motivation to do and publish high-impact research. RESEARCH INTERESTS Data science, web and data semantics, knowledge graphs, ontologies, big data, machine learning, domain adaptation, databases, information visualization, data mining, web crawling, web search, computational biology, software and web development, Linux, open-source software, UX design, Agile software development, human-computer interaction.
    vsuc_fltilesrefresh_TrophyIcon API Development
    Web Development
    LAMP Administration
    Knowledge Graph
    Web Scraping
    Mobile App Development
    LaTeX
    Agile Software Development
    Software Development
    Browser Extension
    Data Management
    Machine Learning
    Python
    Data Scraping
    Data Science
  • $35 hourly
    With a decade-long voyage in full-stack development. My journey has been diverse, collaborating with startups and Fortune 500 firms and navigating the entire lifecycle of development from idea to maintenance. I am competent with a broad range of technologies and frameworks tailored to modern development needs; -Mobile App Development (iOS Swift, React Native) - Front-end Technologies (React, Next.js, HTML, CSS, TailwindCSS, TypeScript, JavaScript) - Back-end Technologies (Node.js, Express, PHP, Laravel) - Database Management (MySQL, MongoDB, Postgres) - API Integration and Development - Responsive Design - Cross-platform Development (React Native) However, my true passion lies in turning concepts into reality and bridging the gap between vision and execution. I am driven by the desire to surpass expectations and deliver top-notch quality whether it's crafting a comprehensive web platform or shaping an exceptional mobile app. Let's embark on this journey together, where your project reaches its destiny through my expertise in full-stack development. Let's start that conversation and propel your project to unprecedented heights.
    vsuc_fltilesrefresh_TrophyIcon API Development
    TypeScript
    JavaScript
    Material UI
    React Native
    MERN Stack
    Web Development
    Node.js
    Firebase
    Python
    Next.js
    React
    iOS Development
    SaaS
    SaaS Development
  • $45 hourly
    I'm an experienced full-stack software engineer with experience in multiple languages, frameworks and technologies.
    vsuc_fltilesrefresh_TrophyIcon API Development
    Mobile App
    Bash Programming
    Automation
    Bug Tracking & Reports
    Agile Software Development
    RESTful API
    Desktop Application
    Amazon Web Services
    TypeScript
    C#
    Git
    Amazon DynamoDB
    GraphQL
    JavaScript
  • $60 hourly
    Seasoned developer with expertise with custom applications, e-commerce, pwa, and ios/android development. I'm looking for work in the following areas: - RESTful API and GraphQL - Headless BigCommerce and Stencil Themes - CMS sites - Vue.js/Nuxt applications - Web Core Vitals optimizations
    vsuc_fltilesrefresh_TrophyIcon API Development
    Payment Processing
    JSON
    DNS
    Nuxt.js
    Google APIs
    Payment Gateway Integration
    PHP
    JavaScript
    WordPress
    BigCommerce
    Theme Customization
    Vue.js
    API Integration
  • $50 hourly
    I am a skilled software engineer with a focus on full-stack web development, offering a wide range of skills to bring your digital vision to life. My expertise spans from crafting captivating website designs for businesses to developing robust e-commerce solutions and mobile applications. Technical expertise: Front-end proficiency in HTML5, CSS3, and proficiency in JavaScript frameworks such as React.js. Back-end proficiency in Node.js, Express.js for server-side functionality. Full-stack proficiency in combining front-end finesse with robust back-end solutions Skillful management of database systems, including MySQL and MongoDB. Web Development Mastery: Aim to deliver pixel perfect and responsive websites that cater to unique client requirements. Extensive expertise in developing online stores, leveraging platforms like Shopify, and crafting custom solutions for e-commerce needs. WordPress development for seamless content management and tailored customization. Mobile Application Development: Proficient in mobile app development with skills in Swift for iOS and Kotlin for Android platforms. Experience in cross-platform app development using frameworks like Flutter, ensuring broader reach and compatibility. Let's collaborate to bring your vision to life and elevate your work or business to new heights!
    vsuc_fltilesrefresh_TrophyIcon API Development
    DevOps
    Game Development
    WordPress Development
    Mobile App Development
    Full-Stack Development
    Web Development
    Unit Testing
    Android App Development
    Android App
    Web Application
    Software Development
  • $105 hourly
    I am a programmer with over 20 years of experience. I also work with a small team of developers and designers when taking on larger projects and for providing ongoing support. I am dedicated to providing businesses with custom engineering, UX design, and providing ongoing support for the lifetime of your company. I specialize in working directly with marketing and IT departments of medium to large companies but also we work well with small companies. Here is what our clients are saying about my myself and my team: 🏅“Codebru is extremely reliable and they do great work. We’ve been working with them for 5+ years on all sorts of different projects. Couldn’t be happier!” - Captivate 🏅“CodeBru always impresses me with how quickly they respond to our coding and web design requests. I honestly have no clue how they work so fast!” - Meeting Tomorrow 🏅“Codebru worked with us to create a product that fit our needs and most importantly, our budget. We will definitely keep using Codebru for all our tech needs in the future.” Putting Chateau Working with me, you will have access to: 🎉Dedicated project manager 🎉Superstar Dedicated developer(s) 🎉Reliable and fast turnaround 🎉Excellent communication 🎉Dedicated ticketing system and dashboard support 🎉Available 24/7 for urgent requests 🎉US based agency Some of our stats: ✅20+ years of experience coding ✅We’ve achieved 100% increase in site speed / lighthouse score ✅Average 3 month turnaround on large projects ✅12 + languages Favorite coding application to built with : PHP • React • Javascript • Gatsby • Drupal • Yii • Laravel • HTML • Payment Integration 🏆 Our top Clients: Identity.digital • Bl.ink • Apex Learning Virtual School • Human Synergistics • Columbia School of Social Work • Captivate • Semarchy • Apex Learning Virtual School • Perfect Search Media • SOUND LIKE A FIT? NEXT STEPS: Click the green ‘Invite to Job’ button in the top right-hand corner, send me a message and let’s organize a call!
    vsuc_fltilesrefresh_TrophyIcon API Development
    WordPress e-Commerce
    CMS Framework
    Yii
    WordPress
    Elasticsearch
    Drupal
    React
    Node.js
    iOS Development
    Android App Development
    PHP
    JavaScript
    jQuery Mobile
    HTML5
  • $777 hourly
    Summary We are providing live dealer games at a low revenue share of 7 ~ 5%. I have a full source code of over 900 slot games and famous live dealer games. (Pragmatic, Evolution, Ezugi, PGSoft, Habanero, Booongo, Playson, CQ9, Evoplay, DreamTech, TopTrend, Genesis) Telegram: @kamil2244 * Advantages of our service rather than genuine game API aggregators 1) Our API fee is low as 7 ~ 5%. But API fee or Revenue share of genuine games is over 15%. 2) Controlling RTP Generally, genuine APIs are providing RTP at over 95%. It makes the owner profit slowly. But our API provides controllable RTP to the admin. Admin can control an individual's RTP in the admin panel. 3) Controlling user's play via graphs. Admin will be able to expect the user's future play accurately. 4) Call function: Admin can give a bonus (call ) to his selected user. * Totally, with those pros, if you invest in this project you will create a great profit as an
    vsuc_fltilesrefresh_TrophyIcon API Development
    API
    Microsoft Project
  • $80 hourly
    Experienced leader with a demonstrated history of strong work ethic and success in any work environment. Strong organizational skills, professionally skilled in Finance, Public Speaking, API Integrations, SQL, Customer Experience, Safety, Risk Management & Insurance.
    vsuc_fltilesrefresh_TrophyIcon API Development
    Strategy
    Executive Coaching
    FTP
    API Integration
    Agile Project Management
    Agile Software Development
    Business Analysis
    Database Management
    Database
    API
    Database Management System
  • $25 hourly
    I am a full stack web developer of 2 years. I have worked on a variety of applications particularly e-commerce websites developed in React, HTML, CSS, JavaScript, Wordpress, Shopify & more. Do you need a revolutionary webapp built from the ground up in React? A beautiful front-end? How about API development or backend code for your existing business? I can do that for you. I do ✅ HTML, CSS & JavaScript ✅ TailwindCSS ✅ UI & Graphic design ✅ Algorithmic Trading Bots ✅ Chrome Extensions ✅ Crypto Wallets ✅ Web applications ✅ Websites in React or Next.js ✅ NodeJS Scripts ✅ Social & Messaging Platforms ✅ Shopify & Wordpress customizations & more... As a developer I enjoy working in Figma in addition to React. This I'd say sets me apart from the other full stack developers you may be looking at. I have experience in UI design so you will get a good looking outcome. More skills: ⚙️ NodeJS / Typescript / JavaScript / Python ⚙️ React / Nextjs / React Native / HTML5 ⚙️ Firebase / Google Cloud Platforms/ Amazon Web Services ⚙️ Docker / TailwindCSS / PyTorch / HuggingFace ⚙️ Github / NPM / Google Analytics 🎨 Figma / Photoshop / After Effects/ Premiere / Ableton Live ⚙️ API Integration / API Development / ExpressJS I write clean, scalable code your team members will understand. Thank you!
    vsuc_fltilesrefresh_TrophyIcon API Development
    Firebase
    Next.js
    ExpressJS
    HTTP
    TypeScript
    Node.js
    React
    Full-Stack Development
    React Native
    CSS
    HTML
    JavaScript
  • $22 hourly
    Versatile Professional Chicago, IL 60638 matt.david.blake@gmail.com +1 312-283-4408 - Over 20 years work experience in various fields. - Creative problem-solving and solution-oriented work style. Decisive and confident decision maker. - Well developed communication skills acquired through managerial positions and, extensive travel due to active design career. - Ability to work well independently and as part of a team, developing effective client/customer relations, providing superior client/customer service and satisfaction. Willing to relocate: Anywhere Authorized to work in the US for any employer
    vsuc_fltilesrefresh_TrophyIcon API Development
    Editorial
    Web Application
    Adobe Flash
    Presentations
    Presentation Design
    Website Customization
    Website Builder
    PowerPoint Presentation
    Video Editing
    Video Design
    Shopify Website Design
    Graphic Design
  • Want to browse more freelancers?
    Sign up

How hiring on Upwork works

1. Post a job (it’s free)

Tell us what you need. Provide as many details as possible, but don’t worry about getting it perfect.

2. Talent comes to you

Get qualified proposals within 24 hours, and meet the candidates you’re excited about. Hire as soon as you’re ready.

3. Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

4. Payment simplified

Receive invoices and make payments through Upwork. Only pay for work you authorize.

Trusted by

How do I hire a API Developer near Chicago, IL on Upwork?

You can hire a API Developer near Chicago, IL on Upwork in four simple steps:

  • Create a job post tailored to your API Developer project scope. We’ll walk you through the process step by step.
  • Browse top API Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top API Developer profiles and interview.
  • Hire the right API Developer for your project from Upwork, the world’s largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a API Developer?

Rates charged by API Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a API Developer near Chicago, IL on Upwork?

As the world’s work marketplace, we connect highly-skilled freelance API Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream API Developer team you need to succeed.

Can I hire a API Developer near Chicago, IL within 24 hours on Upwork?

Depending on availability and the quality of your job post, it’s entirely possible to sign up for Upwork and receive API Developer proposals within 24 hours of posting a job description.

API Developer Hiring Resources
Learn about cost factors Hire talent