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Open Source Software Developer Jobs in Seattle, WA

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

The role involves developing web platform features, collaborating with engineers on open-source ... Company : Microsoft AI is a software development company. Founded in 2024, the company is ...

Consuming from and contributing to free/open source software communities * Solving interesting ... Familiarity with concurrency / parallelism models in a modern programming languages * Any relevant ...

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Showing results 1-20

Open Source Software Developer information

See Seattle, WA salary details

$54.6K

$127.3K

$188.9K

How much do open source software developer jobs pay per year?

As of Jun 23, 2026, the average yearly pay for open source software developer in Seattle, WA is $127,283.00, according to ZipRecruiter salary data. Most workers in this role earn between $102,400.00 and $147,900.00 per year, depending on experience, location, and employer.

What are Open Source Software Developers?

Open Source Software Developers are programmers who create, maintain, or contribute to software projects whose source code is made freely available for anyone to use, modify, and distribute. They often collaborate with a global community of developers and may work on a voluntary basis or be employed by organizations that support open source initiatives. Their work involves writing code, fixing bugs, reviewing contributions, and helping manage project documentation. Open source developers play a key role in advancing technology by making software accessible and fostering innovation through community collaboration.

What is the difference between Open Source Software Developer vs Software Engineer?

AspectOpen Source Software DeveloperSoftware Engineer
CredentialsTypically requires programming skills, familiarity with open source licenses, and sometimes certifications like Linux Foundation certificationsRequires a degree in computer science or related field; certifications like Microsoft Certified or AWS certifications are common
Work EnvironmentOften collaborates in open source communities, contributes to public repositories, and works remotelyWorks in corporate or enterprise settings, often in teams within organizations
Industry UsageUsed across tech, non-profit, and open source communities; focuses on public projectsEmployed in various industries including tech, finance, healthcare, and more for product development

While both roles involve software development, Open Source Software Developers focus on collaborative, community-driven projects often in open environments, whereas Software Engineers typically work within organizations on proprietary or internal systems. The roles overlap in skills but differ in scope and work setting.

How do Open Source Software Developers typically collaborate with contributors from around the world?

Open Source Software Developers often work with a global community of contributors using online collaboration tools such as GitHub, mailing lists, and chat platforms like Slack or Discord. Communication is primarily asynchronous, requiring clear documentation and code review practices to ensure smooth project progress. Developers regularly participate in discussions, review pull requests, and help onboard new contributors, making strong written communication skills essential. This collaborative environment fosters learning and innovation, but also requires flexibility and patience to manage different time zones and cultural perspectives.

What are the key skills and qualifications needed to thrive as an Open Source Software Developer, and why are they important?

To thrive as an Open Source Software Developer, you need strong programming skills, knowledge of version control systems like Git, and familiarity with open source licensing, typically supported by a relevant degree or coding experience. Proficiency with collaborative development platforms such as GitHub or GitLab and understanding of continuous integration tools are commonly required. Excellent communication, self-motivation, and the ability to work effectively in distributed teams set outstanding contributors apart. These skills are crucial for efficiently building, maintaining, and contributing to widely used open source projects in a collaborative, global environment.
Infographic showing various Open Source Software Developer job openings in Seattle, WA as of June 2026, with employment types broken down into 73% Full Time, 9% Part Time, and 18% Contract. Highlights an 100% In-person job distribution, with an average salary of $127,283 per year, or $61.2 per hour.
Software Development Engineer - AWS Cryptography, AWS Encryption at Rest

Software Development Engineer - AWS Cryptography, AWS Encryption at Rest

Amazon

Seattle, WA • On-site

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 4 days ago


Amazon rating

7.4

Company rating: 7.4 out of 10

Based on 6,874 frontline employees who took The Breakroom Quiz

6th of 39 rated national retailers


Job description

Are you passionate about contributing to open source? Are you excited at the prospect of keeping millions of customers' data safe? Do you want to help secure web services by implementing cryptography at scale? Security is the #1 concern of customers moving to the cloud and the AWS Cryptography organization is dedicated to providing the security features our customers need. We enable customers to confidently move sensitive workloads to the cloud where they can benefit from strong security controls that help meet internal and external compliance requirements.
AWS Encryption at Rest team helps AWS customers protect their sensitive data inside and outside of the cloud by building and maintaining easy to use, secure, open source encryption tools and libraries. We are looking for an experienced software developer with an interest in practical cryptography to join us in building the most secure and user-friendly tools available to help our customers protect their data and accelerate use of cryptography in all AWS services.
You should have experience designing scalable, customer-centric systems and a passion for delivering secure software solutions. Along with senior leaders, principal engineers, and security specialists you will own delivering and supporting cryptographic tools and libraries used by internal and external customers around the world.
Key job responsibilities
- Owning the complete software development lifecycle; defining, prioritizing, designing, testing, and implementing new features for AWS Cryptography
- Architecting and driving the end-to-end framework that enables internal teams to integrate seamlessly with encryption libraries.
- Delivering foundational libraries for one of the most secure and reliable services in all of AWS
A day in the life
We own open source libraries, which means that we work out of GitHub, we respond to issues public issues and communicate with external customers regularly.
BASIC QUALIFICATIONS
- 3+ years of non-internship professional software development experience
- Bachelor's degree or equivalent
- Knowledge of system performance, memory management, and parallel computing principles
- Knowledge of professional software engineering & best practices for full software development life cycle, including coding standards, software architectures, code reviews, source control management, continuous deployments, testing, and operational excellence
PREFERRED QUALIFICATIONS
- 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
- Bachelor's degree in computer science or equivalent
- Knowledge of Linux fundamentals
- Experience with development in a distributed systems environment
- Proficiency in at least one modern programming language such as Rust, Python, Java, C, C++, or C# including object-oriented design
Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.
Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit https://amazon.jobs/content/en/how-we-hire/accommodations for more information. If the country/region you're applying in isn't listed, please contact your Recruiting Partner.
The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits.
USA, WA, Seattle - 143,700.00 - 194,400.00 USD annually

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About Amazon

Sourced by ZipRecruiter

Amazon.com, Inc., commonly known as Amazon, is an American multinational technology company. It was founded by Jeff Bezos in 1994 and initially started as an online marketplace for books. Since then, Amazon has expanded its operations and become one of the largest e-commerce companies in the world. Amazon's primary business is its online retail platform, where customers can purchase a vast array of products, including electronics, clothing, books, home goods, and much more. The company offers a convenient and user-friendly shopping experience, with features such as fast shipping, customer reviews, and personalized recommendations. In addition to its e-commerce platform, Amazon has diversified its business into various other areas. One of its notable ventures is Amazon Web Services (AWS), a comprehensive cloud computing platform that provides services such as storage, compute power, and database management to individuals and businesses. AWS has become a leader in the cloud computing industry, powering many websites and applications worldwide. Amazon has also developed its own consumer electronics, including the popular Amazon Kindle e-reader, Fire tablets, Fire TV streaming devices, and the Alexa-powered Echo smart speakers. The Alexa voice assistant, integrated into these devices, allows users to interact with their devices using voice commands, perform tasks, and access information. Furthermore, Amazon has expanded into media and entertainment. It operates Prime Video, a streaming service that offers a wide range of movies, TV shows, and original content. Amazon Music provides a platform for streaming and purchasing digital music, while Audible offers audiobooks and other audio content. The company's commitment to customer satisfaction and convenience is demonstrated by its membership program, Amazon Prime. Prime members receive various benefits, including free two-day shipping, access to streaming services, exclusive deals, and more.

Industry

It services, book publishers, retail, real estate and computer and electronic product manufacturing

Company size

10,000+ Employees

Headquarters location

Seattle, WA, US