Design and implement full-stack features optimized for scalability and performance using Go, React, TypeScript, PostgreSQL, and Redis.
Use AI coding agents like Claude Code and Cursor as a core part of daily work, while maintaining full responsibility for correctness, security, and design decisions.
Create internal tools and testing infrastructure to accelerate team delivery, including agentic workflows and skills that enhance AI tooling effectiveness for the broader team.
Take ownership of testing strategy for both frontend and backend code you deliver.
Design and consume REST and WebSocket APIs with a strong understanding of networking fundamentals.
Uphold security and compliance standards required by government and enterprise clients.
Contribute to the open-source codebase of the company.

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.
Daily fluency in 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 control.
Bias toward shipping and owning complex software end-to-end without close supervision.

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.

Mission-driven work: Your contributions directly support the organizations and missions that depend on secure, reliable collaboration including the U.S. Department of War and critical infrastructure operators worldwide.
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.
End-to-end ownership: Ship and own complex software across the full stack with real accountability for what you build.
Open source at the core: Be part of a vibrant developer community shaping the future of secure collaboration.

Remote (Worldwide)

This role may require obtaining and maintaining a U.S. government security clearance. 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.

Mattermost is hiring a Senior Full Stack Engineer