Staff Full Stack Engineer

What You Will Do

• Define and drive the technical architecture and roadmap for Mattermost’s core web platform across multiple engineering teams, spanning Go, React, TypeScript, PostgreSQL, and Redis
• Set org-wide standards and best practices for AI-agentic engineering workflows — going beyond personal fluency with tools like Claude Code and Cursor to shape how the broader engineering org adopts them, while retaining accountability for correctness, security, and design decisions
• Lead the internal tooling and testing infrastructure strategy that speeds up delivery for the broader engineering org, not just your immediate team
• Own the testing strategy and quality bar across frontend and backend systems, and hold other engineers accountable to it through design reviews and mentorship
• Drive architectural decisions for REST and WebSocket API design, grounded in deep networking fundamentals
• Partner directly with security, compliance, and product leadership on strategic technical bets tied to our government and enterprise customer requirements
• Mentor senior engineers and act as a technical multiplier across the org
• Contribute to and help shape technical direction for Mattermost’s open-source codebase
• What We Are Looking For
• Required:
• Senior full-stack development experience in Go and React (or a comparable stack), with a track record of owning complex systems end-to-end
• Proven experience designing and owning distributed systems or high-availability service architecture at scale
• Experience designing and consuming REST and WebSocket APIs with solid networking fundamentals
• Relational database experience including PostgreSQL, schema design, and query optimization
• Hands-on daily fluency directing AI coding agents such as Claude Code, Cursor, or Copilot for scaffolding, refactors, code review, and test generation — with the judgment to know when to trust the output and when to take the wheel yourself
• Demonstrated ability to influence technical direction across multiple teams without relying on formal authority
• Experience mentoring senior engineers and raising the technical bar for a broader team