Multiple roles at Mattermost
Core
Design, build, and ship end-to-end full-stack features for an open-core collaboration and workflow automation platform used in defense, intelligence, and critical infrastructure.
Role type
Senior IC full stack engineer (Go/React) and strategy-level principal full stack engineer
Builds
Core platform features, internal tooling, and testing infrastructure for the Mattermost collaboration platform
Domain
SaaS / Collaboration tools / Defense & Critical Infrastructure
Required skills
Go, React, TypeScript, PostgreSQL, Redis, REST APIs, WebSocket, networking fundamentals, relational database design, query optimization, coding agents (Claude Code, Cursor)
Preferred skills
distributed systems, high availability architecture, regulated-environment security, open-source contributions, remote-first team experience, staff/principal/tech lead experience, open-source maintainership, FedRAMP, ITAR
Technologies
Go, React, TypeScript, PostgreSQL, Redis, Claude Code, Cursor
Responsibilities
Architect and ship full stack features end to end; own testing strategy; build internal tooling and testing infrastructure; set technical direction for the platform including architecture, roadmap, and coding agent standards; mentor senior engineers
Seniority
Senior, hands-on IC and Principal, strategy & mentorship