or apply directly on Mattermost's site. We never take the application ourselves.
Is this posting real?
- This role has been open
- 21 days Mattermost's roles stay open a median of 45 days
- Reposted
- No
- Salary listed
- Yes 60% of Mattermost's roles list one
- Ghost-job risk at Mattermost
- high 9 stale, 0 reposted of 15 open
- Hiring momentum
- 18 roles opened in the last 90 days ↑ up vs. the prior 90 days
- Last confirmed on the employer's board
- 2026-09-17
Measured from postings appearing on and disappearing from Mattermost's own greenhouse board since 2026-08-03. Full hiring picture for Mattermost.
About this role
As a Staff Full Stack Engineer at Mattermost, you will set the technical direction for the core web platform, focusing on secure collaboration for defense and critical infrastructure sectors. Your role involves driving architecture and strategy across the Go backend and React/TypeScript frontend, mentoring engineers, and ensuring compliance with security standards. You will also lead the adoption of AI coding agents in engineering workflows and partner with various teams to deliver high-quality features.
- benefits
- 1/5
- freshness
- 4/5
- career value
- 5/5
- role clarity
- 5/5
- pay transparency
- 5/5
Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Mattermost as an employer.
What you need
- Senior full-stack development experience in Go and React (or a comparable stack)
- 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
- Relational database experience including PostgreSQL, schema design, and query optimization
- Hands-on daily fluency directing AI coding agents such as Claude Code, Cursor, or Copilot
- Demonstrated ability to influence technical direction across multiple teams
Nice to have
- Prior experience operating as a staff, principal, or technical lead engineer at another company
- Experience maintaining an open-source project
- Program-level familiarity with compliance frameworks relevant to defense or government customers
- Experience helping scale engineering practices or standards across a growing organization
- Background in defense, intelligence, or critical infrastructure products
Worth weighing
- No specific benefits or perks listed in the posting
- Role may require obtaining and maintaining a U.S. government security clearance
- Candidates must meet federal eligibility requirements for access to export-controlled information
Summarised from Mattermost's posting. Read the full original.
Listed by Mattermost on their greenhouse job board, last confirmed open on 2026-09-17. PitchMeAI is not the employer.
More roles at Mattermost
- Staff Full Stack EngineerToronto, Ontario, Canada