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Staff Full Stack Engineer

MattermostUnited StatesEngineering
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Salary
$172,724 - $227,135 USD
Job type
Full-time
Posted
26 Aug 2026
Status
Open · checked 7d ago

About this role

The Staff Full Stack Engineer position at Mattermost in the United States involves setting the technical direction and scaling the core web platform for critical infrastructure and defense sectors. This role suits an experienced full-stack technologist with a background in distributed systems who excels in an AI-forward development environment.

Role Overview

Mattermost seeks a Staff Full Stack Engineer to lead technical architecture and strategy across the Go backend and React/TypeScript frontend. In this role, the engineer will shape AI-agentic engineering workflows, define testing and tooling strategies, and partner with product and security leadership to meet the needs of government and enterprise clients in the United States.

Key Responsibilities

Formulate and guide the technical architecture and roadmap for the core web platform across multiple engineering groups.
Establish organization-wide standards for AI-assisted coding workflows while maintaining security and correctness.
Lead internal tooling and testing infrastructure strategies to accelerate delivery for the engineering organization.
Shape REST and WebSocket API design principles utilizing strong networking fundamentals.
Collaborate with compliance and security teams on strategic technical initiatives for enterprise and government clients.
Mentor senior team members and contribute to the open-source codebase.

Requirements

Senior-level full-stack development experience utilizing Go and React or similar technologies.
Demonstrated background in designing and owning high-availability service architecture or distributed systems at scale.
Practical knowledge of designing REST and WebSocket APIs with solid networking principles.
Relational database experience including schema design, query optimization, and PostgreSQL.
Daily fluency in directing AI coding agents such as Claude Code, Cursor, or Copilot for refactors, scaffolding, and test generation.
Ability to influence technical direction across teams without formal authority and mentor senior staff.
Comfort working within high-compliance or regulated environments like government or enterprise security.
Ability to meet U.S. government security clearance requirements and U.S. export control laws (EAR and ITAR).

Nice to Have

Previous experience functioning as a staff, principal, or technical lead engineer.
History of maintaining open-source software projects.
Familiarity with defense or government compliance frameworks like FedRAMP or ITAR.
Experience expanding engineering standards across a growing company.
Background working in critical infrastructure, intelligence, or defense products.
Experience building workflows, skills, or tools on top of AI coding agents.

Skills and Tools

Go
React
TypeScript
PostgreSQL
Redis
REST and WebSocket APIs
AI Coding Agents (Claude Code, Cursor, Copilot)

Salary and Benefits

Target annual salary range of $172,724 to $227,135, determined by market conditions, location, skills, and experience.
Mission-driven work supporting critical infrastructure and defense organizations worldwide.
A remote-friendly culture designed for autonomy and ownership.
Participation in an AI-forward environment with agentic development practices.

About the Company

Mattermost operates a leading collaborative workflow platform designed for defense, intelligence, security, and critical infrastructure. The platform runs on-premises and in private clouds to provide secure messaging, file sharing, and workflow automation. Trusted by Fortune 500 companies and government agencies, the company powers high-stakes workflows across mission planning and cyber defense.

How to Apply

Interested candidates should visit the official Mattermost careers page to submit an application for this position.

Skills and tech stack

Questions candidates ask

What is the salary range for the Staff Full Stack Engineer role?

The target salary range is between $172,724 and $227,135 per year, varying based on location, qualifications, skills, and market conditions.

What technical stack is used in this position?

The engineering work utilizes Go for the backend and React with TypeScript for the web frontend, alongside PostgreSQL and Redis.

Are there specific security clearance requirements for applicants?

Yes, this role may require obtaining and maintaining a U.S. government security clearance, and applicants must meet federal eligibility requirements as well as U.S. export control laws like EAR and ITAR.

What experience is required for the position?

Candidates need senior full-stack development experience in Go and React or a comparable stack, distributed systems design expertise, relational database experience, and daily fluency with AI coding agents.

Is this a remote position?

Mattermost operates with a remote-first culture, though this specific role is located in the United States and subject to U.S. compliance and eligibility requirements.

Ready to apply?

The application is on the official Mattermost careers page.

Apply on company site