Hire The Top 1% Freelance API Developers

Flexiple is a network of top API developers, engineers, and architects with hourly rates ranging from $30 to $100. Join 100+ teams who have hired API developers from Flexiple for a few weeks to a few years!


API Developer


Naya Labs


API Developer


BMW Group


Senior API Developer




Senior API Developer


Johnson & Johnson


API Developer


Electronic Arts Inc.

Flexiple spent good amount of time understanding our requirements, resulting in accurate recommendations and quick ramp up by quality developers.

Narayan Vyas, Senior PM (YC S12)

Overall Flexiple brought in high-level of transparency with quick turnarounds in the hiring process at a significantly lower cost than any alternate options.

Esther Hersh, Co-founder ('17 NYU Grad)

Flexiple has been instrumental in helping us grow at a fast pace. Their vetting process for engineers is top notch and they connected us with quality talent quickly.

Tanu V, Founder (#1 Salesforce Leads App)

Work With Flexiple's Expert API Developers!

Be a short-term or a long-term project, don't compromise on the quality of talent you work with. Flexiple handpicks only the Top 1% through a 6-stage screening process.
    APIs Angular Node

    Edwin is a senior software engineer with 8 years of experience developing software products using JS frameworks. He is skilled in several back-end languages and ... framework to deliver robust, performant API back ends and the clients and applications they serve. Edwin is a specialist who provides effective solutions by using best practices and pragmatic methods bundled with his mastery of business and technical skills Read more

    Previously at Affirm

    Hire Edwin
    API Java ExpressJS

    Chisimdi is a detail-oriented full stack developer with over 5 years of experience with web technologies. His experience in software development has availed him with ... the ability to refactor spaghetti code into reusable, testable, and trustworthy software programs. With a vast skillset paired with a genuine love of technology, Chisimdi has an interest towards Artificial Intelligence and Robotics Read more

    Previously at Naya Labs

    Hire Chisimdi
    API Java C++

    Yuqiu is a Full Stack developer who loves open source. He is passionate about agile software development practices with good user interface design. With degrees ... in computer science, software Engineering and an iSAQB certification, Yuqui is a proficient developer who places a strong emphasis on top-down and button-up approaches. He is always eager to develop simple solutions for problems Read more

    Previously at BMW Group

    Hire Yuqiu
    API Java Typescript

    Onder is an enthusiastic software architect/developer with 17 years of experience participating in the complete product development lifecycle of successfully launched applications. He has a ... solid reputation for diligence regarding project accuracy and enhanced end user functionality. Onder is an exemplary verbal and written communicator who clearly conveys project parameters with professionalism. Read more

    Previously at Ericsson

    Hire Onder
    API JavaScript PHP

    Michael is a results-driven full-stack developer with 7+ years of hands-on experience building high performing layers, reusable components, and performance optimizations with PHP, JavaScript, among ... many more. With a Masters in Computer Science from the Seoul National University, Michael is a skilled professional who loves to develop applications that are robust, easy to maintain, and scalable. Read more

    Previously at Johnson & Johnson

    Hire Michael
    API Javascript Firebase

    Swapnil is a software developer with 9+ years of professional experience. He is a goal oriented professional who is adept in technologies like Java, ReactJS, ... Flutter, React Native, NodeJS, Android, etc. He has spent 3+ years of his career working with cloud based enterprise software, web applications and game services for one of the largest video game publishers in the world, EA Sports. Read more

    Previously at Electronic Arts Inc.

    Hire Swapnil
    API Java Python

    Vasile is a young, talented, enthusiastic software engineer with solid experience and a versatile skill set. He is proficient with multiple languages and frameworks such ... as Python, Java, C++, Docker, and many more. He is a creative professional who has good communication skills. He has a knack for picking up new software. With a strong work ethic, Vasile is focused on helping you reach your goal. Read more

    Previously at Continental

    Hire Vasile
    API Java Hibernate

    Iulia is a young, talented fullstack developer with a solid experience and a versatile skillset. She is adept in various languages and frameworks ranging from ... Java, SQL, Spring, Angular, HTML, among many others. She is a great team player, with good good technical and soft skills. She is a result oriented professional with a passion for learning and a strong work ethic. Iulia is focused on helping you reach your goal. Read more

    Previously at Evozon

    Hire Iulia

Flexiple Helps You Hire Quality Developers, Handpicked for You

  • Work only with the best

    Our developers are selected through a 6-stage screening process. As a result, our developers have an average of 5-years industry experience and are ready to immediately contribute on projects.
  • Work with Role-specific Developers

    Save time and energy lost in manually sifting through profiles. Our solutions expert along with our Director of Technology will handpick developers who are a perfect match for your requirement.
  • Work Risk-free & Start within 2 Days

    With immense confidence in the quality of our developers and the accuracy of our recommendations, we are happy to offer you a 1-week trial where you pay only if you are satisfied.

Find the perfect developer for your team at the right price

  • Individual Contributor

    • 1-3 years of experience
    • Mostly worked on a single stack
    • Top Individual Contributor
  • Multi-faceted Contributor

    • 3-7 years of experience
    • Expertise in multiple stacks
    • Worked on niche skills
    • Mentors Junior Developers
  • Leader & Diverse Contributor

    • 7-10+ years of experience
    • Worked across stacks, products
    • Multiple niche skills
    • Led multiple teams in the past

How We Select the Top 1%

45.4%pass rate

Depth in past work

Flexiple Developers are reviewed on their experience and complexity of products built. Those who display depth and have worked on end-to-end projects are given an introductory call.

14.6%pass rate

Good communication and motivation

Over a call, the developer’s ability to communicate in an articulate manner is tested. A deeper understanding of the candidate’s technical experience and also motivation to freelance is achieved.

3.1%pass rate

Strong technical abilities

Over one or more F2F interviews, the developer’s involvement and performance in building complex software products are assessed. This sets the platform to delve deeper into technology-specific discussions.

1.5%pass rate

Keen problem solving and coding

Developers' mental agility and problem-solving abilities are tested through a coding test involving algorithmic as well as skill-specific problems. A mixture of live evaluation and timed coding tests is used.

1.2%pass rate

Splendid reviews in background check

The live experience of working with developers is verified by reaching out to past clients and/or employers. Inputs on various qualitative factors such as reliability, punctuality, communication and responsiveness are received.

1%pass rate

Consistent exemplary performance

Performance during each engagement is continually assessed. Our developers are expected to maintain Flexiple standards across all engagements with our customers.

Hire Freelance API Developers within 48 Hours!

Our simple process gets you working with the right freelancer quickly and seamlessly

Don't Just Take Our Word For It!

(Y-Combinator S12 and Andreessen Horowitz-backed Company)

Quality product launched on schedule by a team of 8 engineers

"Flexiple helped us hire quality developers across technologies - Node, Rails, PHP, Python. They spent a good amount of time understanding our requirements, resulting in accurate recommendations and quick ramp up by developers. We also found them to be much more affordable than other alternatives for the same level of quality."

Narayan Vyas,

Senior Product manager, Plivo Inc

(Incubated at the European Space Agency)

Helped set up and scale tech team on demand

"Flexiple has exceeded our expectations with their focus on customer satisfaction! The freelancers are brilliant at what they do and have made an immense impact. Highly recommended :)"

Henning Grimm,

Founder, Aquaplot

(Acquired by Unicorn, Hike Messenger)

Saved 30% costs with 2 software products delivered

“Overall Flexiple brought in high-level of transparency with extremely quick turnarounds in the hiring process at a significantly lower cost than any alternate options we had considered.”

Kislay Shashwat,

VP Finance, CREO

('17 NYU Graduates)

Found a perfect new member for its globally distributed team

"Working with Flexiple has provided us with partners who are providing us with the required technical support for our growth and success!"

Esther Hersh,

Co-founder, Peblio Inc

(Y-Combinator S18)

Hired the first remote engineer to work directly with the CTO

"It has been great working with Flexiple for hiring highly talented and hardworking folks on contract. We were looking for a suitable developer on the back-end and we got to know Ankur through Flexiple. We are very happy with the commitment and skills he brings to the job and we will be working with Flexiple going forward as well after this positive experience. I recommend them highly for any freelancing talent you are looking to hire!"

Neil Shah,

Chief of Staff, Prodigal Tech

(#1 Lead Routing App for Salesforce)

Helped scale the product with a team of engineers

"Flexiple has been instrumental in helping us grow at a fast pace. Their vetting process for engineers is top notch and they were able to connect us with quality talent quickly. The team put great emphasis in understanding our requirements and getting to know us which ensured that we were matched with folks who were a great fit not only technically but also culturally."

Tanu V,

Founder, Power Router

(Acquired by Reliance for $100 million)

Delivered 2 high quality products forming a long partnership

"The engagement with Flexiple and their community members has helped us get work done in a timely manner and helped us go above and beyond."

Swapan R,

Co-founder, Haptik

(Acquired by PayU for $70 million)

Built their first remote tech team of a frontend and backend engineer

"Highly responsive team with prompt support and willingness to go the extra mile. Powered by technically brilliant personnel on board, we have happy results – all this at an affordable price!"

Sajith N,

Product Manager, Wibmo Inc
  • How to Hire a Great Freelance API Developer?

  • Application Programming Interfaces (APIs) are a set of tools made available in programming languages that allow applications to interact with software systems with ease. It enables developers to create complex functionalities with a more seamless process of data retrieval between systems.

    API integration is now a vital part of all modern businesses. They help facilitate connectivity within their organization and with their partnerships; allowing for a smoother streamline of vital activities in their business ecosystem.

    If you’re looking to hire a freelance API developer for your company, this guide is going to help you find the perfect fit. We’ve included everything you need to know about hiring a freelance API developer.

    We have broken the sections into the following parts:
    1. Let's introduce API to you.
    2. Why is API widespread?
    3. What are the tools used by API developers?
    4. Writing the Job Description to hire freelance API developers
    5. Interview Questions for hiring an API Developer
    - Basic Questions
    - Advanced Questions
    - Data Structures/Algo Questions

    1. Let's introduce API to you

    • Since the inception of computer science, the conceptual idea behind an API has always existed. The origins of the API can be traced back to the 1940s & '50s, to Computer Scientists Maurice Wilkes and David Wheeler who first published a book containing the specifications behind an API.

    • Around 1960s, the term API was used to describe the interaction between a graphic program and the rest of the computer. But by the 1970s, APIs were incorporated into database management systems leading to the discovery that APIs support all types of programming.

    • The Web-based APIs that are popular today, can be traced back to a company called Salesforce when they launched their web based sales automation tool in 2000. This was said to be the the first web API made.

    • With the advent of the internet era in the 2000s, many companies understood the potential of the world wide web as a medium to deliver services, and as a result began transforming brick and mortar model store into virtual stores to conduct business.

    • With a widespread commercial adoption, APIs are now an integral to almost all data exchanges made over the internet and is a vital element of all businesses who have a web presence.

    • 2. Why is API widespread?

      • A major pull that attracts businesses to APIs is its ability to boost productivity by automating the development process and its ease in integrating existing codes. It reduces valuable time in developing applications from scratch.
      • Since APIs reduce development efforts significantly, they also help in saving costs. With fewer resources, companies can drive innovation and functionality, and help open up new areas for growth.
      • APIs have helped improve a company's competitive position as many businesses have started leveraging APIs to enhance customer experience and create new products which have opened up new avenues for revenue generation.

      3. What are the tools used by API developers?

      The following are some of the tools used by API developers at various stages of development:

      1. API Testing Tools

      • RESTAssured - An open-source java library used by programmers for testing and validating the Restful Web Services.
      • Postman - An HTTP client tool that tests HTTP requests, and tests suites.
      • SoapUI - An open-source cross-platform API testing tool. It allows developers to write, run, integrate, and automate advanced API tests.

      2. API Documentation Tools

      • Swagger - An API testing and documentation tool which not only covers API documentation but also lets developers test the APIs right on the documentation itself.
      • Insomnia - A cross-platform API testing tool that checks the reliability, performance, functionality, and security of the programming interfaces.

      4. Writing the Job Description to hire freelance API developers

      Below are some key points that we at Flexiple have learned through trial and error - a process of filtering through over 15,000 developers.

      • Years of software development experience: Be specific about the technology you’re looking for and the number of years of experience needed. A proxy to years of experience can be the number of production-level apps worked on.

      • Type of products built in the past: Based on the type of product you are trying to build - social network, SAAS product, etc. - you can prioritize certain developers over others.

      • Exposure to specific industries: Developers who have built products in certain industries will already know key aspects of laying the foundation for a great product and will be able to predict possible problems.

      • Experience working remotely: A developer with past remote work experience is an added advantage as they would have first-hand experience of everything - right from how contracts work to streamlined communication, as well as timelines and deliverables.

      • Strong communication: An essential thing to look at when hiring a freelancer is excellent communication skills. Since all the interaction happens online, a freelancer should be able to effectively communicate to ensure a streamlined execution of all work.

      • 5. Interview Questions for hiring an API Developer

        Now that you have made a quality JD, it can still be tricky to evaluate the skills of your applicants. To help you with that, we have created a pool of questions that a good software developer should be comfortable with.
        It is important to note that the ability to answer these questions doesn't imply that you have a top quality candidate. But it definitely is a big step in that direction.

        To help you navigate through these questions, we’ve categorized the interview questions in 3 parts:

        A. Basic concepts: Includes all basic concepts used across languages. This section will give you an understanding of how strong their programming foundation is.

        B. Advanced concepts: Includes all concepts that someone with higher expertise should know.

        C. DS/Algorithm questions: To test the logical capability of the candidate.

        A. Basic concepts

        Coming soon!

        B. Advanced concepts

        Coming soon!

        C. Data Structure/ Algorithm

        Coming soon!

      Parting thoughts on hiring freelance API developers

      As discussed, it isn't easy to find a quality freelance software developer but this guide makes the process easier for you. To offload the entire hiring process, reach out to us at Flexiple. We've designed a high-quality, 6-step screening process to find the top 1%, freelance developers. You can find the best freelance API developers here. We've already served over a hundred clients, earning great reviews for the quality of service.

      Lastly, to quickly summarize the process of hiring an API developer for you:
      1. Note your project requirements and hire accordingly. Do not go for the lowest or the highest-paid developer.
      2. Don’t hire without vetting- consider asking questions right from the basics to advanced to logical questions.
      3. Look for companies like Flexiple that help you find the perfect fit.
      That is everything you need to know about hiring a freelance API developer. Happy hiring! :)

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