Staff Full Stack Engineer

Mattermost

. Define and drive technical architecture and roadmap for Mattermost’s core web platform across multiple engineering teams .

Posted 10/31/2026full-timeRemote • CanadaLead💰 CA$195,001 - CA$238,965 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in full-stack development with a focus on Go and React, alongside a strong ability to define technical architecture and drive quality standards across complex systems. Proven experience in mentoring engineers and influencing technical direction in high-compliance environments is essential.

Highest-signal resume keywords

Full-Stack DevelopmentTechnical ArchitectureREST And WebSocket APIsRelational Database ExperienceAI Coding Agents

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

GoReactDistributed SystemsHigh-Availability Service ArchitecturePostgreSQLSchema DesignQuery OptimizationAI Coding AgentsTesting StrategyQuality Standards

Soft Skills

MentoringInfluencing Technical DirectionCollaboration

Tools & Technologies

MattermostOpen-Source CodebaseInternal ToolingTesting Infrastructure

Certifications & Qualifications

Government Security Clearance Eligibility

Industry Keywords

Regulated EnvironmentsHigh-Compliance EnvironmentsFedRAMPITARDefenseIntelligenceCritical Infrastructure

Tech Stack

Tools & technologies

Distributed SystemsPostgresReactGo

About the role

Key responsibilities & impact

Define and drive technical architecture and roadmap for Mattermost’s core web platform across multiple engineering teams
Set organization-wide standards and best practices for AI-agentic engineering workflows
Lead internal tooling and testing infrastructure strategy
Own testing strategy and quality standards across frontend and backend systems
Drive architectural decisions for REST and WebSocket APIs
Partner with security, compliance, and product leadership on strategic technical decisions
Mentor senior engineers and serve as a technical multiplier across the organization
Contribute to and shape Mattermost’s open-source codebase
Ship a meaningful full-stack feature within the first 90 days while assessing the technical landscape and identifying high-leverage improvements

Requirements

What you’ll need

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
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 for scaffolding, refactors, code review, and test generation
Ability to influence technical direction across multiple teams without formal authority
Experience mentoring senior engineers and raising the technical bar for a broader team
Comfort operating in regulated or high-compliance environments
Legally authorized to work in Canada without current or future sponsorship
Must meet eligibility requirements for possible government security clearance or equivalent designation
Prior staff, principal, or technical lead experience (nice to have)
Experience maintaining an open-source project (nice to have)
Familiarity with FedRAMP or ITAR (nice to have)
Experience scaling engineering practices across a growing organization (nice to have)
Background in defense, intelligence, or critical infrastructure products (nice to have)
Experience building tools or workflows on top of AI coding agents (nice to have)

Benefits

Comp & perks

Remote-first culture: Work from anywhere with a globally distributed, high-trust team built for autonomy and ownership
AI-forward environment with AI-enabled workflows
End-to-end ownership of complex software
Open-source development and developer community participation
Interview accommodations available upon request