Staff Performance Engineer, Mattermost

• BS in Computer Science, Computer Engineering, or related field/experience
• 3+ years writing and tuning highly performant HTTP/WebSocket applications written in Go
• 3+ years both developing for PostgreSQL and tuning PostgreSQL deployments for scale and performance
• Expertise in shaping architectural decisions and driving technical direction for complex, high-impact projects
• Experience developing with AI-assisted development tools (such as Claude Code)
• Solid understanding of modern development workflows, including CI/CD, E2E testing, distributed systems, and cloud infrastructure
• Strong written and verbal communication skills suitable for diverse audiences
• Capable of working independently across multiple time zones while actively engaging in team collaboration

Desirable

• Mattermost is seeking an expert in Go and PostgreSQL to help us reach new levels of performance, scale and reliability for our many mission-critical customers
• Often this means anticipating performance issues with incoming features and steering the team in a better direction
• Sometimes this means proposing new architectural changes to make things simpler, more manageable, or just plain faster
• And occasionally this means deep diving into a customer escalation to identify the root cause, fix it, and up-level our organisation to prevent this from ever happening again
• As a Staff Software Engineer, you will play a pivotal role in driving core architectural improvements to the open-source Mattermost monorepo, written in Go
• You will continuously identify opportunities to improve deployment processes and refine best practices, collaborating with other engineering and product teams to share knowledge and learnings
• Your expertise will also be crucial in assisting Customer Success and Support teams with troubleshooting and incident response
• Your contributions to our open-core platform using your personal GitHub account will empower the broader developer community while leaving a lasting professional legacy
• The person in this role will join a fast-paced, flexible full stack team responsible for developing and delivering impactful features and systems that empower collaboration for the world’s most critical organisations
• Help us build and grow one of the largest React and Go open-source projects
• Proactively find issues affecting performance, scale and reliability, and drive solutions across engineering directly into customers’ hands
• Help define a best-of-class architecture not only for the core product, but also our comprehensive load testing tool, wide array of plugins, and burgeoning audio/screensharing Calls product
• Mentor the existing server backend team, technical account managers, and customer support managers to find and resolve issues for themselves
• Take ownership of our experimental support for caching with Redis and expand adoption both internally within engineering and externally with customers
• Lead by example in code quality, and teach by giving high-quality code review feedback
• Identify gaps in our testing strategy and developer experience to unblock and accelerate all of engineering