About the role
Mattermost is seeking a Senior Full Stack Engineer to help build and scale its core web platform for teams in defense and critical infrastructure. The role involves full-stack development with Go, React, TypeScript, PostgreSQL, and Redis, using AI coding agents like Claude Code. The engineer will architect features, develop tooling, own testing, and maintain security standards. The company is remote-first and open-source.
Requirements
Strong full-stack development in Go and React; experience with REST and WebSocket APIs; relational database experience with PostgreSQL; daily fluency with AI coding agents like Claude Code; bias toward shipping end-to-end. Nice to have: distributed systems, regulated environments, defense background, open-source contributions, remote team experience, building tools on AI agents.
About the company
Mattermost
Mattermost provides secure, operational sovereignty solutions for national security and critical infrastructure sectors. The platform offers collaboration, automation, and AI capabilities for air-gapped, on-premise, and private cloud environments, ensuring control and advanced security for government and enterprise clients.
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