Drive technical architecture and roadmap across Go, React, TypeScript, PostgreSQL, and Redis; own testing strategy, internal tooling, and API design (REST and WebSocket). Set org-wide practices for AI-agentic engineering workflows, collaborate with security and compliance teams, mentor senior engineers, and contribute to Mattermost's open-source codebase. Role is remote-first and may require obtaining and maintaining a U.S. government security clearance.

Mattermost seeks a Staff Full Stack Engineer to set technical direction and drive architecture across Go and React/TypeScript for its core web platform. Role includes owning testing and internal tooling strategy, designing REST and WebSocket APIs, working with security and compliance teams, mentoring senior engineers, and shaping open-source code. Candidates must be legally authorized to work in Canada without sponsorship and may require government security clearance depending on engagements. Target salary range (CAD): 195,001–238,965 per year.

Role requires building and owning full-stack features (Go backend and React/TypeScript frontend), designing and consuming REST and WebSocket APIs, maintaining security and compliance for government/enterprise clients, and using AI coding agents as part of the development workflow. Position is remote-first and requires legal authorization to work in Canada.

Build and scale full-stack features across Go, React, TypeScript, PostgreSQL, and Redis. Use AI coding agents as part of daily workflow, design and consume REST and WebSocket APIs, maintain required security/compliance standards, own testing strategy, and contribute to Mattermost's open-source codebase in a remote-first environment.

Lead architecture and development of the React Native mobile app focused on unreliable connectivity, WebSocket reliability, offline-first storage/sync and conflict resolution, performance and memory optimizations, mobile security and compliance, and testing/tooling improvements. Requires demonstrated React Native and JavaScript/TypeScript experience, networking fundamentals, offline-first design, and familiarity with native iOS and/or Android development. Role may require U.S. government security clearance and federal eligibility for export-controlled information.