Mattermost Staff Full Stack Engineer at Mattermost responsible for technical direction and scaling of core web platform using Go backend and React/TypeScript frontend. Lead architecture, AI-agentic engineering workflows, and mentoring.
Responsibilities
Define and drive the technical architecture and roadmap for Mattermost’s core web platform across multiple engineering teams, spanning Go, React, TypeScript, PostgreSQL, and Redis
Set org-wide standards and best practices for AI-agentic engineering workflows — going beyond personal fluency with tools like Claude Code and Cursor to shape how the broader engineering org adopts them, while retaining accountability for correctness, security, and design decisions
Lead the internal tooling and testing infrastructure strategy that speeds up delivery for the broader engineering org, not just your immediate team
Own the testing strategy and quality bar across frontend and backend systems, and hold other engineers accountable to it through design reviews and mentorship
Drive architectural decisions for REST and WebSocket API design, grounded in deep networking fundamentals
Partner directly with security, compliance, and product leadership on strategic technical bets tied to our government and enterprise customer requirements
Mentor senior engineers and act as a technical multiplier across the org
Contribute to and help shape technical direction for Mattermost’s open-source codebase
What We Are Looking For
Senior full-stack development experience in Go and React (or a comparable stack), with a track record of owning complex systems end-to-end
Proven experience designing and owning distributed systems or high-availability service architecture at scale
Experience designing and consuming REST and WebSocket APIs with solid networking fundamentals
Qualification
Prior experience operating as a staffBackground in defenseExperience building toolsHow Success Is MeasuredFirst 90 Days
Required
Senior full-stack development experience in Go and React (or comparable stack)
Preferred
Prior experience operating as a staff, principal, or technical lead engineer at another company
Experience maintaining (not just contributing to) an open-source project
Program-level familiarity with compliance frameworks relevant to defense or government customers (e.g., FedRAMP, ITAR)
Experience helping scale engineering practices or standards across a growing organization
Background in defense, intelligence, or critical infrastructure products
Experience building tools, skills, or workflows on top of AI coding agents including MCP servers, agent skills, or CI-integrated agents
How Success Is Measured
First 90 Days: Build cross-team credibility by shipping a meaningful full-stack feature on the core platform, while assessing the technical landscape and identifying the highest-leverage architectural or process improvements to pursue.