Staff Full Stack Engineer
Mattermost · Toronto, Ontario, Canada
Posted 21 days ago · $195,001 – $238,965
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 the Go backend and React/TypeScript frontend. Your role involves driving architecture, establishing best practices for AI-agentic workflows, and mentoring engineers while ensuring compliance with security and reliability standards. You will collaborate across teams to deliver features that meet the stringent requirements of defense and critical infrastructure sectors.
- benefits
- 1/5
- freshness
- 4/5
- career value
- 4/5
- role clarity
- 4/5
- 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 (not just contributing to) 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 listed in the posting
- Role involves working in regulated environments, which may require security clearances
- Compensation is market-based and varies based on several factors, with a target salary range provided
- Remote-first culture may appeal to candidates seeking flexibility
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
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