
Principal Software Engineer
Role summary
GitHub is seeking a Principal Software Engineer to shape the future of its core platform infrastructure. This leadership role involves driving system architecture for critical services, mentoring engineering teams, and ensuring the stability, security, and performance of GitHub's platform for millions of developers. The engineer will work with a global team to enhance and scale infrastructure, optimize deployments, and mitigate technical risks. Key responsibilities include technical leadership in design, code reviews, and performance tuning, as well as shaping strategic vision and driving innovation. The role requires deep expertise in large-scale distributed systems and cloud platforms.
### Who you are
- We're looking for someone with deep expertise in building and operating large-scale distributed systems—someone who thrives on solving hard problems around reliability, availability, and performance at massive scale
- You have a proven track record of tackling complex technical challenges with creativity and pragmatism, and you excel in highly collaborative, cross-functional environments
- 11+ 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 10+ 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 or related field AND 9+ 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 7+ 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 PhD 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 equivalent experience
- Experience with cloud platforms like Microsoft Azure and Amazon Web Services
- Understanding of production system monitoring and observability
- Ability to think critically about both system design and software engineering concepts and blend those perspectives pragmatically based on project needs
- Demonstrated experience with large-scale system architecture and design, particularly in cloud-based environments, with a strong understanding of distributed systems and microservices
- Experience working closely with product management, design, and other engineering teams to drive cross-functional projects and deliver high-quality product
### What the job involves
- GitHub is seeking a Principal Software Engineer to help shape the future of our core platform infrastructure
- In this critical leadership position, you'll drive system architecture for our most critical services, inspire and coach engineering teams, and deliver solutions that keep GitHub running for millions of developers worldwide
- Our team focuses on the systems that power GitHub at scale, ensuring our platforms remain stable, secure, and performant under extreme load
- As a Principal Software Engineer, you'll work alongside a globally distributed team of talented engineers and managers to enhance and scale our most critical infrastructure, delivering an exceptional experience to our diverse and growing customer base
- You'll lead by example—both through your own technical contributions and by mentoring others
- You'll guide technical strategy, influence architectural decisions, and drive performance optimization across teams
- Our culture is built on developer empathy, transparency, and inclusive collaboration
- Here, curiosity and a drive for impact are at the heart of everything we do
- Lead and influence system architecture design for complex products and solutions, ensuring they meet security, compliance, and performance requirements
- Establish and mentor best practices for testing, performance tuning, and code quality, defining success metrics and ensuring maintainability across dependencies
- Provide technical leadership during code reviews to ensure reliability, scalability, and alignment with product goals
- Partner with product managers and technical leads to define service requirements and incorporate feedback into future designs
- Act as an expert in debugging tools and methods, leading proactive and reactive development to resolve issues across teams
- Optimize deployments and runtime performance to meet business objectives, ensuring safe rollouts aligned with GitHub's standards
- Drive improvements in development quality and team performance through tooling, automation, and knowledge sharing
- Lead product refinement through telemetry analysis, performance metrics, and experimentation frameworks to inform engineering decisions
- Develop strategies to identify and mitigate technical risks, including frameworks for risk assessment and contingency planning
- Shape the strategic vision for technology and product development, identifying opportunities for innovation and leading initiatives aligned with GitHub's long-term goals
### Benefits
- Flexible time away to support balance in your work and life
- Clear diversity, inclusion, and anti-discrimination policies backed by business practices and company culture
- 100% of medical, dental, and vision insurance premiums covered by GitHub for you + your dependents. (Includes gender-affirming benefits)
- Five months of paid family leave to all new parents with the option to use it all at once or throughout the child’s first year
- Family forming benefits that cover fertility, infertility, adoption, and surrogacy costs and support
- Mental health benefits that offer resources and support and cover therapy and coaching sessions for you and your dependents
- Generous 401(k) matching with 50% match up to the IRS 402(g) limit (US; competitive non-US pension options internationally)
- Employee stock purchase plan that lets you purchase Microsoft stock at a discount. (Microsoft is our parent company.)
Sample Github interview questions
- 1
Discuss scalability and security principles, trade-offs, and best practices.
system designaverage - 2
How would you design a scalable and maintainable API for GitHub’s core services?
system designhard - 3
Explain the benefits of containerization technologies like Docker and how they can be utilized to improve GitHub’s infrastructure.
technicalmedium - 4
Create a scalable system for streaming audio and video in real-time.
system designmedium - 5
How would you go about creating a custom integration between GitHub and an external service, such as Jira or Slack?
system designmedium
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