Mattermost is seeking a Staff Performance Engineer with deep expertise in Go and PostgreSQL to help us achieve new levels of performance, scale, and reliability for our mission-critical customers. As part of a fast-paced, flexible full stack team, you will drive core architectural improvements to our open-source platform, empowering collaboration for the world's most critical organizations.
What You'll Do
- Proactively identify issues affecting performance, scale, and reliability, and drive solutions directly into customers' hands.
- Help define a best-of-class architecture for the core product, our load testing tool, plugins, and our audio/screensharing Calls product.
- Mentor the server backend team, technical account managers, and customer support managers to find and resolve issues independently.
- Take ownership of our experimental support for caching with Redis and expand its adoption internally and with customers.
- Lead by example in code quality and provide high-quality code review feedback.
- Identify gaps in our testing strategy and developer experience to unblock and accelerate all of engineering.
- Continuously improve deployment processes and refine best practices in collaboration with other teams.
- Assist Customer Success and Support teams with troubleshooting and incident response.
- Contribute to our open-core platform using your personal GitHub account.
What We're Looking For
- BS in Computer Science, Computer Engineering, or related field/experience.
- 3+ years writing and tuning highly performant HTTP/WebSocket applications in Go.
- 3+ years developing for 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.
- 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.
Nice to Have
- Experience with Grafana, Prometheus, and other performance monitoring tools.
- Experience with audio/visual/networking/WebRTC.
- Experience contributing to open-source projects.
- Experience with end-to-end testing frameworks such as Playwright and/or Cypress.
- Expertise in defence, intelligence, or security-focused workflows.
- Has worked fully remotely with global teams.
Technical Stack
- Go, PostgreSQL, Redis
- HTTP/WebSocket, React
- CI/CD, Grafana, Prometheus
- WebRTC, Playwright, Cypress
Team & Environment
You will join a fast-paced, flexible full stack team responsible for developing and delivering impactful features and systems.
Benefits & Compensation
- Market-based compensation, varying by location, skills, experience, and market conditions.
Work Mode
This is a remote-first position open to candidates based in the United Kingdom.
Mattermost is an EEO Employer. We do not tolerate discrimination against staff or applicants based on race, religion, national origin, age, disability, pregnancy status, veteran status, or other personal characteristics.
