Staff Full Stack Engineer

• We are seeking a Staff Full Stack Engineer to set the technical direction for and scale Mattermost’s core web platform for teams operating in defense and critical infrastructure sectors. You’ll drive architecture and technical strategy across our Go backend and React/TypeScript web frontend — partnering across teams to ship features that hold up under strict security, compliance, and reliability requirements
• Our engineering culture is AI-forward. We expect engineers to work fluently with AI coding agents such as Claude Code day-to-day — for scaffolding, refactors, code review, and test generation — and treat that as core craft rather than a shortcut. We would rather hire smart people who get stuff done than chase an exact tech-stack match. If you have a track record of shipping and owning complex software end-to-end, we want to hear from you
• 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

Benefits

• Fully remote work
• Office setup fund
• Coworking space stipend
• Global and regional team meetups
• Growth fund
• Unlimited vacation
• Family and Friends Days
• Async weeks
• Health benefits
• 401(k)
• Pension
• Open Source Fridays
• Community hackathons and events

• Experience mentoring senior engineers and raising the technical bar for a broader team
• Relational database experience including PostgreSQL, schema design, and query optimization
• Comfortable operating in regulated or high-compliance environments (e.g., enterprise security, government, or critical infrastructure requirements)
• Proven experience designing and owning distributed systems or high-availability service architecture at scale
• 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
• Senior full-stack development experience in Go and React (or a comparable stack), with a track record of owning complex systems end-to-end
• Experience designing and consuming REST and WebSocket APIs with solid networking fundamentals
• Experience building tools, skills, or workflows on top of AI coding agents including MCP servers, agent skills, or CI-integrated agents
• Prior experience operating as a staff, principal, or technical lead engineer at another company
• Experience maintaining (not just contributing to) an open-source project
• Program-level familiarity with compliance frameworks relevant to defense or government customers (e.g., FedRAMP, ITAR)
• Experience helping scale engineering practices or standards across a growing organization
• Background in defense, intelligence, or critical infrastructure products