Hire the Top 3% of Open Source Developers in 48 Hours

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.

Meet Open Source Developers in our Exclusive Network

Featured Talent

Charles Grady, Toptal open source Developer.

Charles Grady

Verified Expert in Engineering
18 Years of Experience

Open Source Developer

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.

Open Source DevelopmentPythonNumPyAlgorithmsGISAPIREST APIBack-end DevelopersDebuggingDatabaseXMLETL
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Lucian Petrut, open source Freelancer.

Lucian Petrut

Verified Expert in Engineering
10 Years of Experience

Open Source Developer

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.

Open Source DevelopmentOpenStackLinuxSoftware DevelopmentPython
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Tuomas Jaakola, Freelance open source Developer for Hire.

Tuomas Jaakola

Verified Expert in Engineering
23 Years of Experience

Open Source Developer

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.

Open Source DevelopmentLinuxJavaScriptPHPXMLCSSNode.jsBootstrapReact.jsReact NativePythonDjangoFirebase
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Peter Goldstein, Freelance open source Programmer for Hire.

Peter Goldstein

Verified Expert in Engineering
21 Years of Experience

Open Source Developer

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.

Open Source DevelopmentDedicated Ruby on Rails DevelopmentGolangRubyAgile DevelopmentPostgreSQLDNSDevOpsREST APIBack-end DevelopersAWSFull-stackDatabase
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Rajender Koppula, Expert open source Programmer for Hire.

Rajender Koppula

Verified Expert in Engineering
7 Years of Experience

Open Source Developer

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.

Open Source DevelopmentKubernetesLinuxDevOpsAnsibleDockerAgile Development
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Russell Stuart, Freelance open source Programmer for Hire.

Russell Stuart

Verified Expert in Engineering
32 Years of Experience

Open Source Developer

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.

Open Source DevelopmentLinuxCPHPAsteriskSQLPythonLinux System AdministrationApacheWeb DevelopmentEmbedded Systems EngineeringBack-end DevelopersSoftware Architecture
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Zachary Eisinger, Freelance open source Developer for Hire.

Zachary Eisinger

Verified Expert in Engineering
11 Years of Experience

Open Source Developer

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.

Open Source DevelopmentC#GitHubSQLMicrosoft Development.NETJavaScriptHTML5
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Stepan Anokhin, open source Freelancer.

Stepan Anokhin

Verified Expert in Engineering
8 Years of Experience

Open Source Developer

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.

Open Source DevelopmentGitJavaPythonRubyJavaScriptSpring BootJUnitReact.jsBack-end Developers
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Artak Arakelyan, open source Coder.

Artak Arakelyan

Verified Expert in Engineering
14 Years of Experience

Open Source Developer

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.

Open Source DevelopmentCEmbedded Systems EngineeringArduinoFirmware
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Shane Freed, Accomplished open source Freelancer.

Shane Freed

Verified Expert in Engineering
36 Years of Experience

Open Source Developer

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 has 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.

Open Source DevelopmentJavaSpring BootHibernateAngularAWSNode.jsJavaScriptTypeScriptMySQLBack-end DevelopersDatabaseAWS Lambda
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Mostafa Draz, open source Coder.

Mostafa Draz

Verified Expert in Engineering
13 Years of Experience

Open Source Developer

Mostafa is a software engineer with over a decade of experience developing 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 has worked with several technologies, such as Java, Go, Python, JavaScript, and React. He's led projects of multiple sizes across several industries, such as tourism, airlines, project management, and data analysis.

Open Source DevelopmentJavaSpringHibernatePHPJavaScriptReact.jsLaravelPythonHTML5ReduxCSSTypeScript
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Discover More Open Source Developers in the Toptal Network
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2

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3

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Get up to two weeks to work with and assess your chosen developer and pay only if you decide to hire them.
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All of our talent are seasoned experts who ramp up quickly, readily contribute as core team members, and work with you to minimize onboarding time.

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Excellent technical communication

Toptal developers must possess strong written and verbal communication skills. They work effectively across multiple collaboration tools and convey complex engineering ideas and concepts with ease.

7.4%Pass Rate

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Each developer is required to demonstrate their computer science fundamentals, problem-solving ability, and technical aptitude to a panel of leading experts.

3.6%Pass Rate

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Toptal developers are skilled at tackling roadblocks creatively and independently. Each candidate is live-screened by two top developers where they have to offer multiple paths to the solution and make decisions on the spot.

3.2%Pass Rate

End-to-End project execution

Our developers deliver a test project to completion, demonstrating their skills across ideating, scoping, implementation, and problem-solving.

3%Pass Rate

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Toptal developers are expected to maintain a perfect track record while working with clients. We assess our talent after every engagement to ensure our standards for excellence were met.

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Why Organizations Choose Toptal®

Toptal gave us access to the best designers out there, saving us a lot of time and allowing us to build the best possible product.

Thierry JakircevicGeneral Manager, Digital Solutions, Bridgestone

Toptal’s talent is really excellent. They are able to work through large business problems and code incredibly efficiently.

Emily LemonSenior Director, Cleveland Cavaliers

The kind of people we looked for were hard to find. Toptal helped us achieve our goals by bringing high quality resources to bear on very short notice.

Elmar PlatzerDigital Transformation Leader, CSR

If you’ve tried working with other vendors, Toptal is going to be a different type of company to work with; they’re going to meet you where your needs are.

Matthew SchumacherSenior Product Manager, Alpha - Precision Drilling

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