Hire the Top 3% of Freelance Open Source Developers

Toptal is a marketplace for top open source developers, engineers, programmers, coders, architects, and consultants. Top companies and startups can hire Toptal dedicated (full-time), hourly, or part-time open source freelancers for their mission-critical software projects.

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Clients rate Toptal open source developers 4.9 / 5 on average based on 703 reviews.
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Hire Freelance Open Source Developers

Zachary Eisinger

Freelance Open Source Developer
Verified Expert in Engineering
UTC-08:00
United States
Toptal Member Since August 26, 2021

Zachary is a full-stack developer with experience developing IaaS to power secure, fast, and reliable continuous integration and continuous deployment. He works intensively with DevOps practices and runs GitHub actions and Azure Pipelines to improve their DevOps products. In addition, Zachary has worked in the eCommerce space, focused on authentication and user identity work.

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Charles Grady

Freelance Open Source Developer
Verified Expert in Engineering
UTC-06:00
United States
Toptal Member Since September 26, 2022

Charles is primarily a back-end developer specializing in Python. He has more than 16 years of experience developing RESTful APIs, high-throughput computations, and cluster interfaces in an open source environment. Charles published papers, gave conference presentations, and taught domestic and international workshops showcasing the tools he created, the community infrastructure, and his research projects.

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Peter Goldstein

Freelance Open Source Developer
Verified Expert in Engineering
UTC-05:00
United States
Toptal Member Since March 11, 2022

Peter is a hands-on developer, architect, CTO, and technical founder passionate about using best practices to quickly build high-quality products. He has over 20 years of experience building full-stack applications. Peter specializes in Ruby on Rails and Go but is a software generalist who is comfortable working in many languages. He is a committed open-source enthusiast who leverages open source to reduce both the cost and time needed to build the products and features he creates.

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Shane Freed

Freelance Open Source Developer
Verified Expert in Engineering
UTC-05:00
United States
Toptal Member Since April 9, 2021

Shane is a Java developer with 25 years of experience building enterprise apps and specializes in writing maintainable, extensible, SOLID code. While 95% of Shane's experience is in the Java realm, his passion is full-stack development with Angular. Shane's served in many different roles, including architect, team lead, lead developer, and individual contributor. While Shane doesn't always have to lead a project, his USMC background makes him perfect for lead roles and mentoring.

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Lucian Petrut

Freelance Open Source Developer
Verified Expert in Engineering
UTC+02:00
Romania
Toptal Member Since October 6, 2020

Lucian is an avid open source contributor, having a special interest in cloud computing and storage technologies. He has proven experience working on numerous projects for 7+ years using diverse programming languages and tools. Lucian is committed to delivering high-quality code without exceeding deadlines. He's able to withstand pressure and adapt to changing requirements.

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Tuomas Jaakola

Freelance Open Source Developer
Verified Expert in Engineering
UTC+02:00
Finland
Toptal Member Since June 6, 2022

Tuomas believes that code is the very essence of life. He is passionate about making tools and apps to make life easier and fun. Tuomas demands high quality of himself, and is a Linux and open source lover. Tuomas has an adventurous personality and is always ready to have new challenges and experiences.

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Artak Arakelyan

Freelance Open Source Developer
Verified Expert in Engineering
UTC+04:00
Armenia
Toptal Member Since May 26, 2022

Artak has over 15 years of experience in different high-tech industries. He has strong knowledge in many areas of electronics, embedded systems, and signal processing. Artak has a proven ability to develop various hardware and software systems and looks for embedded systems projects with complex functional requirements.

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Rajender Koppula

Freelance Open Source Developer
Verified Expert in Engineering
UTC+05:00
India
Toptal Member Since September 26, 2022

Rajender is a DevOps and SRE engineer with nearly four years of expertise in building and supporting web and native SaaS solutions on Kubernetes, cloud, and OpenShift. He has experience in service and infrastructure migrations and securing and integrating with open source alternatives in CI/CD processes. Rajender has worked with automation and logging and has set up metrics.

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Stepan Anokhin

Freelance Open Source Developer
Verified Expert in Engineering
UTC+07:00
Russia
Toptal Member Since March 5, 2019

With a solid mathematical knowledge base and a professional software developer background, Stepan has the experience and skills to fulfill most software engineering role. During his professional career, he's worked on various projects including large enterprise systems, web development, and cloud computing. Stepan is always eager to explore new areas in computer science and apply bleeding-edge technologies.

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Russell Stuart

Freelance Open Source Developer
Verified Expert in Engineering
UTC+10:00
Australia
Toptal Member Since December 2, 2021

Russell has enjoyed solving complex problems using software and hardware for decades. He paid his way through university, writing accounting systems for hospitals. Russell then formed a company to develop cash registers, writing the BIOS, the operating system, a distributed database, and networking. After selling the firm, he discovered the open-source and used it to build a computer system covering 20 sites across Australia for a firm that grew into the world's largest employer of mechanics.

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Mostafa Draz

Freelance Open Source Developer
Verified Expert in Engineering
UTC+10:00
Australia
Toptal Member Since May 13, 2020

Mostafa is a software engineer with over a decade of experience in the development of Software systems, from small apps to large-scale systems used by millions of users worldwide. He has experience working with large companies such as Google, Atlassian, and Rakuten. Mostafa worked with several technologies over his career, such as Java, Go, Python, JavaScript, and React. He led projects of multiple sizes across several industries, such as tourism, airlines, project management, and data analysis.

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THE TOPTAL ADVANTAGE

98% of Toptal clients choose to hire our talent after a risk-free trial.

Toptal's screening and matching process ensures exceptional talent are matched to your precise needs.

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Toptal in the press

... allows corporations to quickly assemble teams that have the right skills for specific projects.

Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.

Our clients
Creating an app for the game
Conor Kenney
Creating an app for the game
Leading a digital transformation
Elmar Platzer
Leading a digital transformation
Building a cross-platform app to be used worldwide
Building a cross-platform app to be used worldwide
Drilling into real-time data creates an industry game changer
Drilling into real-time data creates an industry game changer
Testimonials
Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of Tripcents as any in-house team member of Tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a startup, they are our secret weapon.

Brantley Pace

CEO & Co-Founder

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley

Director

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller

CEO

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik

Co-founder

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee

Principal

How to Hire Open Source Developers Through Toptal

1

Talk to One of Our Client Advisors

A Toptal client advisor will work with you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-selected Talent

Within days, we'll introduce you to the right open source developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new open source developer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

Find Experts With Related Skills

Access a vast pool of skilled developers in our talent network and hire the top 3% within just 48 hours.

FAQs

  • How quickly can you hire with Toptal?

    Typically, you can hire open source developers with Toptal in about 48 hours. For larger teams of talent or Managed Delivery, timelines may vary. Our talent matchers are highly skilled in the same fields they’re matching in—they’re not recruiters or HR reps. They’ll work with you to understand your goals, technical needs, and team dynamics, and match you with ideal candidates from our vetted global talent network.

    Once you select your open source developer, you’ll have a no-risk trial period to ensure they’re the perfect fit. Our matching process has a 98% trial-to-hire rate, so you can rest assured that you’re getting the best fit every time.

  • To hire the right open source developer, it’s important to evaluate a candidate’s experience, technical skills, and communication skills. You’ll also want to consider the fit with your particular industry, company, and project. Toptal’s rigorous screening process ensures that every member of our network has excellent experience and skills, and our team will match you with the perfect open source developers for your project.

  • At Toptal, we thoroughly screen our open source developers to ensure we only match you with the highest caliber of talent. Of the more than 200,000 people who apply to join the Toptal network each year, fewer than 3% make the cut.

    In addition to screening for industry-leading expertise, we also assess candidates’ language and interpersonal skills to ensure that you have a smooth working relationship.

    When you hire open source developers with Toptal, you’ll always work with world-class, custom-matched open source developers ready to help you achieve your goals.

  • You can hire open source developers on an hourly, part-time, or full-time basis. Toptal can also manage the entire project from end-to-end with our Managed Delivery offering. Whether you hire an expert for a full- or part-time position, you’ll have the control and flexibility to scale your team up or down as your needs evolve. Our open source developers can fully integrate into your existing team for a seamless working experience.

  • We make sure that each engagement between you and your open source developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you’re completely satisfied with the results, we’ll bill you for the time and continue the engagement for as long as you’d like. If you’re not completely satisfied, you won’t be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial.

Tap Into World-class Talent

  • Trusted Talent Only

    Trusted Talent Only

    All of our talent are seasoned professionals who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

  • The Right Fit

    The Right Fit

    We have a knack for matching you with the right fit. Start working with your new hire on a no-risk trial period, paying only if satisfied.

  • Scale as Needed

    Scale as Needed

    Hire talent within 48 hours and scale your team up or down as needed, no strings attached.

  • Seamless Hiring

    Seamless Hiring

    We handle all aspects of billing, payments, and NDA’s. Let us take care of the overhead while you focus on building great products.

  • Flexible Engagements

    Flexible Engagements

    Choose the engagement type that suits your needs — hourly, part-time, or full-time — with the ability to change anytime.

  • Expert Talent Matching

    Expert Talent Matching

    Focus on your project and enjoy support from your dedicated account executive and expert talent matcher.

Top Open Source Developers Are in High Demand.

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