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Top freelance API Integration developers available to hire
Freelance API Integration Developer5.0 (43 reviews)
Senior Full‑Stack Developer with over seven years’ experience designing, building and maintaining large‑scale web applications.
Track record of delivering end‑to‑end solutions by partnering with stakeholders to translate business and user needs into reliable software.
Committed to clean, maintainable code, performance tuning, security best practices, and automated CI/CD pipelines.
Nearly two years of hands‑on AI experience, integrating machine learning models and automation to boost product intelligence.
I’ve contributed as a developer at global leaders Adobe and Newgen, as well as at high‑growth startups MoveInSync and Zillious Solutions.
Skills
Advanced:
Java, MySQL, PostgreSQL, Spring, Hibernate, Spring Boot, Maven/Gradle, Microservices, Multithreading & Concurrency Control, Web Services (SOAP & REST), RPC, Git, Google Cloud Platform (GCP), Database Modeling & Schema Design, SQL (Stored Procedures/Functions, Triggers), Docker, Kubernetes.
Intermediate:
TypeScript, Python, Angular, React, API Gateway, Service Discovery, Load Balancer, ELK Stack, Kafka, RabbitMQ, Redis Cache, RAG (Retrieval-Augmented Generation), AI Agents, LangGraph, Vector Databases, AI Workflows, Fine‑Tuning.
Core Strengths:
Scalable system design, back‑end architecture, data structures & algorithms.
How I Can Help You
– I’m here to tackle your toughest technical challenges with expertise and dedication.
Special Offer
– Enjoy your first session free! (Terms & Conditions apply — let’s discuss your needs during our requirement-gathering call.)
Satisfaction Guaranteed
– Not satisfied? Request an instant refund, no questions asked.
For a comprehensive overview of additional technologies and frameworks tailored to your needs, please refer to the Expertise section of my profile.
Freelance API Integration Developer5.0 (59 reviews)
Seasoned Web Developer and Blockchain enthusiast with a proven track record in the IT and services industry. Expertise in Research, PHP, HTML, JavaScript, and Blockchain development, including Smart Contracts. Skilled in automation, application testing, and cybersecurity analysis for web and mobile apps.
Technical leader with 9 years building scalable solutions across auction platforms, content management systems, and enterprise applications. Currently leading AI-First development at Pickles Auctions, helping teams adopt GitHub Copilot and modern development practices. Strong background in microservices, CLI tools, and data engineering with a focus on mentoring developers and designing systems that solve real business problems.
Freelance API Integration Developer5.0 (7 reviews)
Hi! Am a 20+ year developer and live in California. I am an expert in iOS, Python and AI development. I have many languages and platforms I have worked in. OpenAI and AI platforms like Firebase are the main request I get and am very experienced with them. I am happy to offer my services and see how I can help you with your projects, as a developer and mentor.
Please see my attached resume, I have loads of work experiance.
[Click to view my resume!](https://docs.google.com/document/d/1Zb7WLp0nsHRN8XSudXm_4VB4oNi4S6YytsWr32kwYnY/edit?usp=sharing)
My links are [derekstock.com](http://derekstock.com/) & [https://www.linkedin.com/in/derekstock/](https://www.linkedin.com/in/derekstock/) < take a look!
I have been doing a lot of tutoring on Wyzant, here on Codementor and working contract jobs.
I am currently looking for contract remote contract or full time work, I am very flexible.
Lets talk! Hopefully we can work together!
Derek
Freelance API Integration Developer5.0 (26 reviews)
Is your AI-powered MVP built on a fragile 'vibe-coded' foundation? Are you struggling to scale a prototype that was built with lightning speed but is now plagued by bugs, security holes, and technical debt?
I transform brittle AI prototypes into robust, **production-ready applications**. As a senior AI engineer specializing in the **Node.js** and **React** ecosystem, I bridge the gap between rapid, AI-assisted development and the disciplined engineering required for scalable, secure software.
But robust software is only half the battle. The other half is making it *work for your business*. I design and implement **intelligent automation workflows** that connect your apps, eliminate manual tasks, and free up your team to focus on high-impact work.
Whether you need to rescue a failing project, automate a core business process, or build a scalable MVP from the ground up, I provide the expert oversight to ensure your AI initiatives deliver real, measurable value.
**My Core Services:**
* **🤖 AI Code Rescue & Remediation:** I conduct deep **AI code audits** to debug, refactor, and secure fragile codebases (especially those built with LangChain.js). I turn unmaintainable prototypes into stable, scalable assets ready for real users.
* **⚙️ Intelligent Workflow Automation & Integration:** I design and build digital assembly lines for your business. I offer a full spectrum of automation solutions:
* **Rapid Integration:** Using **Zapier, Make.com & n8n** to connect your existing tools and solve immediate process bottlenecks.
* **Custom API Development:** Building custom **Node.js** APIs and webhooks to connect proprietary systems or handle complex logic that no-code tools can't.
* **AI-Powered Decisions:** Infusing your workflows with intelligence using the **OpenAI API** to triage support tickets, qualify sales leads, or generate content automatically.
* **🚀 Custom AI Solution Development:** I architect and build bespoke AI solutions from scratch, from **Custom GPTs** and intelligent **AI Agents** to complex RAG (Retrieval-Augmented Generation) pipelines that leverage your private data.
* **👨🏫 AI Engineer & Career Mentorship:** I provide 1-on-1 coaching to help developers navigate the AI landscape, master tools like LangChain.js, and build a successful career in AI engineering and automation.
**My Tech Stack:**
* **Languages:** Node.js, TypeScript, JavaScript
* **Frameworks:** React, Next.js, Express.js, NestJS
* **AI / LLM:** LangChain.js, OpenAI API, LlamaIndex, Vector Databases (Pinecone, Qdrant)
* **Automation Platforms:** Zapier, Make.com, n8n
Ready to move past the prototype phase and build a real business? **Send me a message with your project details or book a session to get started.**
---
### Service Packages
* **Package 1: AI Code Audit & Production-Ready Roadmap**
* **Description:** Have an AI-generated MVP that feels unstable? I'll perform a comprehensive review of your codebase. You'll receive a detailed report identifying security vulnerabilities, performance bottlenecks, and a concrete, actionable roadmap to make your application **production-ready**. This is the perfect first step to de-risk your project.
* **Package 2: Intelligent Automation Workflow**
* **Description:** Let's put a core business process on autopilot. We'll map out a high-impact workflow and I'll build a robust automation to solve it. Ideal for **automating lead qualification**, **triaging customer support tickets**, or **streamlining content pipelines** using the best tool for the job—Zapier, Make, or custom Node.js scripts.
* **Package 3: Scalable AI MVP Development**
* **Description:** Need to build an MVP the *right* way? I'll architect and develop a **scalable MVP** from day one, using professional, spec-driven development practices. We'll build a strong foundation with clean, documented code and a modern stack (Node.js, React) to avoid the technical debt that plagues "vibe-coded" projects.
* 15+ years of experience in software development.
* 7 years of building apps with NodeJS, React and Angular.
* 5 years of hands-on work with cloud-based.
* Solid background in computer science and software development.
* Proficient in important practices like Clean Code, Refactoring, Test Automation, and CI/CD.
* Exceptional at solving problems and learning new technologies quickly.
Freelance API Integration Developer5.0 (1 reviews)
Software Developer with over 6 years of experience specializing in back-end engineering. Proven ability to design and build resilient, scalable micro-services using Java, Spring Framework, and cloud-native technologies. Consistently delivers high-performance software that enhances user experience and drives operational efficiency. Open to new challenges in Software Engineering roles.
Freelance API Integration Developer5.0 (33 reviews)
I am **US-based** and have **30+ years experience** during which I have been a software developer, a programming trainer, a marketer and an entrepreneur.
My current focus is in **long term tutoring** students in **programming**, **CI/CD DevOps**, and/or how to use AI like **Claude Code** or Codex for programming. Specifically:
1. I specialize in **Go** and **Bash** programming
2. I love **API**s and can teach you how to call them with command line Bash tools
3. I can teach you how to write API **servers** in Go, and also how to call APIs in Go.
4. I have 25+ years in **SQL** and can teach SQLite, MySQL, or Postgres
5. I can teach you to configure **macOS** and **Linux** for programming
6. I can teach **CI/CD** with **GitHub Actions**, Jenkins, GitLab, or others
7. I can teach using **Docker** containers and/or how to build them
8. I can how to write **Kubernetes** controllers and operators in Go
9. I can teach you how to work with **Digital Ocean** or basics in **AWS**.
I can also teach you many other things. While I don't use Windows daily, I have used it in the past and am familiar with PowerShell and Windows System for Linux so I can help with those if need be.
ALSO, I am great at learning on the fly so if you are interested in me helping you learn something I have not listed I will consider giving a discount for topics that allow me to learn new things while teaching, especially related to AWS.
Freelance API Integration Developer5.0 (13 reviews)
Hi! I'm Experienced Full-Stack Web Developer (Angular, React, Javascript, NodeJs), Use my powers to turn your dreams into reality. I learned to program making websites from scratch with HTML, CSS, Javascript, React, Redux, Angular, NodeJs, Express and MongoDB.
MERN stack (MongoDB, Express, ReactJS, and NodeJS).
MEAN stack (MongoDB, Express, AngularJs, and NodeJS).
Wordpress (Custom Themes, Modifications, Performance... )
This means that you can ask me for help on anything related to Javascript, HTML, CSS (and SCSS/Sass of course), responsive/mobile websites, usability an so on.
With 9 years of experience developing software, I always advocate for the best available solutions and the cleanest code. I also love to explain how and why the code works so you can also learn more from it.
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Frequently asked questions
How long do API Integration projects normally take?
The length of a project depends on many factors, including the scope of your project and the technical complexity of it. When you post a freelance API Integration project request on Codementor, you’ll have the option to indicate when you’d expect the project to be completed. We suggest chatting with the interested developers to ensure both sides are on the same page. For more information on how to post a freelance API Integration request on Codementor, check out our article.
How much does it cost to hire a freelance API Integration developer?
We don’t charge anything when you post a freelance hiring request for API Integration developers! You’ll have the chance to determine what the budget for your project is when you post the request. You’ll only need to pay the developer if you’re 100% satisfied with their work. Please know that Codementor charges a small service fee when a developer completes the job.
What makes Codementor API Integration developers different?
We do a comprehensive technical and communications screen of all API Integration developers at Codementor. Our network includes book authors, popular open source contributors, top Stack Overflow users and engineers at top tech companies. In addition, to continually ensure the quality of our freelancers, we regularly check in on existing API Integration developers’ user satisfaction rates.
What happens if I’m not happy with the freelancer’s work?
As a platform, we strive to ensure you’re always happy with your API Integration project’s results. If you’re unsatisfied with the results, you can choose to get a refund for the project. Additionally, you can contact our support team should you need any further assistance with your project.
For more answers to frequently asked questions, see here.
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