Senior Software Engineer

GitHub is the world’s leading platform for agentic software development. As a Senior Software Engineer on the React Platform team, you will design and evolve the frontend architecture and tooling that underpin GitHub's web UI, enabling teams to build scalable and secure React applications.

Responsibilities:

• Design and evolve frontend frameworks, tooling, and architectural patterns that enable frontend contributors across GitHub to build scalable, accessible, and performant React applications
• Improve client-side performance and reliability — identify and resolve latency issues, improve observability, and help establish high standards for the web platform
• Design, develop, test and ship high-quality technical solutions
• Collaborate with cross-functional and product engineering teams to understand needs, shape platform investments, and implement innovative solutions
• Provide technical leadership, mentorship, pairing opportunities, and code reviews to encourage the growth of others
• Own and advocate for the health and quality of the systems that the team builds, including participating in on-call and first responder rotations
• Write architecture briefs and proposals, carry out code experiments, and build prototypes to learn how we can achieve planetary scale with our systems
• Design and implement APIs to facilitate seamless integration between software components
• Utilize CI/CD tools to set up automated pipelines for continuous integration and delivery
• Become intimately familiar with the systems you build and take pride in writing maintainable code

Requirements:

• 6+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust, or Python
• OR Associate's Degree in Computer Science, Electrical Engineering, Electronics Engineering, Math, Physics, Computer Engineering, Computer Science, or related field AND 5+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust, or Python
• OR Bachelor's Degree in Computer Science, Electrical Engineering, Electronics Engineering, Math, Physics, Computer Engineering, Computer Science, or related field AND 4+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust, or Python
• OR Master's Degree in Computer Science, Electrical Engineering, Electronics Engineering, Math, Physics, Computer Engineering, Computer Science, or related field AND 2+ years experience in Software Engineering, Computer Science, or related technical discipline with proven experience maintaining and delivering production software coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, Ruby, Rust, or Python
• OR Doctorate in Computer Science, Electrical Engineering, Electronics Engineering, Math, Physics, Computer Engineering, Computer Science, or related field
• OR equivalent experience
• Strong practical skills in modern web technologies and languages including but not limited to React, TypeScript, Node.js, and GraphQL
• Experience building and scaling large React applications in production, including shared frontend platforms, architectural patterns (e.g. data routing, state management), developer tools, or infrastructure that other engineering teams rely on to ship products
• Experience with server-side rendering architectures and designing or consuming APIs that serve frontend applications (e.g.,GraphQL, REST, or BFF patterns)
• Experience with performance optimization and latency reduction in consumer-facing web applications (e.g., code splitting, bundle analysis, Core Web Vitals improvement)
• Experience with observability and monitoring in production environments — metrics, logging, tracing, or real-user monitoring for client-side applications