Note: The job is a remote job and is open to candidates in USA. Mattermost is a collaborative workflow platform serving defense, intelligence, security, and critical infrastructure organizations with secure, controllable collaboration tools. The Senior Full Stack Engineer will build and scale the core web platform across Go, React, TypeScript, PostgreSQL, and Redis, while applying AI-forward development practices and maintaining strict security, compliance, and reliability standards.
Responsibilities
- Architect and build full-stack features optimized for scalability and performance across Go, React, TypeScript, PostgreSQL, and Redis
- Leverage AI coding agents such as Claude Code and Cursor as a core part of your daily workflow while retaining full accountability for correctness, security, and design decisions
- Develop internal tooling and testing infrastructure to speed up the team's delivery, including agentic workflows and skills that make AI tooling more effective for the broader team
- Own testing strategy across frontend and backend code you ship
- Design and consume REST and WebSocket APIs with solid networking fundamentals
- Maintain the security and compliance standards required by our government and enterprise clients
- Contribute to Mattermost's open-source codebase
Skills
- Strong full-stack development experience in Go and React, or a comparable stack
- 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
- Bias toward shipping and owning complex software end-to-end without close supervision
- Candidates must meet federal eligibility requirements to be considered
- Applicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR
- Experience with distributed systems or high-availability service architecture
- Familiarity with enterprise or regulated-environment security requirements
- Background in defense, intelligence, or critical infrastructure products
- Open-source contributions
- Experience working on distributed or remote-first teams
- Experience building tools, skills, or workflows on top of AI coding agents including MCP servers, agent skills, or CI-integrated agents
Benefits
- Remote-first culture: Work from anywhere with a globally distributed, high-trust team built for autonomy and ownership
- AI-forward environment: We actively adopt and build AI-enabled workflows. Agentic development is core craft here, not a novelty
- Open source at the core: Be part of a vibrant developer community shaping the future of secure collaboration
Company Overview