Senior Full Stack Engineer

Mattermost, Inc.; United States; On-site; USD 120,000 - 190,000; Full time

Benefits offered by this job

Health insurance

Job summary

Mattermost, Inc. is seeking a Senior Full Stack Engineer to help build and scale a core web platform for defense and critical infrastructure sectors. The role focuses on Go and React, architecting features and ensuring security and compliance across systems.

You will leverage AI coding agents to accelerate delivery, design scalable REST/WebSocket APIs, and contribute to testing and tooling. The role requires ownership of features end-to-end and collaboration across teams in a fast-paced

Qualifications

• Strong full-stack development in Go and React or equivalent stack.
• Experience designing and consuming REST and WebSocket APIs with solid networking fundamentals.
• Relational database experience with PostgreSQL including schema design and query optimization.
• Hands-on fluency directing AI coding agents for development tasks.
• Proven ability to ship and own complex software end-to-end without close supervision.

Responsibilities

• Architect and build full-stack features optimized for scalability and performance.
• Leverage AI coding agents in daily workflows while ensuring code correctness and security.
• Develop internal tooling and testing infrastructure to improve delivery efficiency.

Skills

Go

React

TypeScript

PostgreSQL

Redis

AI coding agents

REST APIs

WebSocket APIs

Networking fundamentals

Full-stack

Tools

Claude Code

Copilot

Job description

To help build and scale a core web platform for defense and critical infrastructure sectors, the full-time Senior Full Stack Engineer will architect and develop features using Go and React, leveraging AI coding agents to enhance workflow while ensuring compliance and security standards.

Key responsibilities

• Architect and build full-stack features optimized for scalability and performance across Go, React, TypeScript, PostgreSQL, and Redis
• Leverage AI coding agents in daily workflows while maintaining accountability for code correctness and security
• Develop internal tooling and testing infrastructure to enhance team delivery efficiency

Required qualifications

• Strong full-stack development experience in Go and React, or a comparable stack
• Experience designing and consuming REST and WebSocket APIs with solid networking fundamentals
• Relational database experience including PostgreSQL, schema design, and query optimization
• Hands-on fluency directing AI coding agents such as Claude Code or Copilot for various development tasks
• Proven ability to ship and own complex software end-to-end without close supervision