Senior Software Engineer — AI Dev Tools & Agent Workflows

Engg; United Kingdom; On-site; GBP 90,000 - 130,000; Full time

Job summary

Coder is building the next generation of AI development infrastructure. As a Senior Software Engineer on Coder’s Engineering team, you’ll develop and evolve production systems powering our agentic development experiences.

You’ll work across the agent harness, integrations, and workflows that connect agents with real development environments, while staying hands-on to solve complex technical problems. You’ll design and implement robust systems using Go and front-end work in React/TypeScript,

Qualifications

• Strong experience building and operating production software systems.
• Hands-on experience with Go.
• Experience with React and TypeScript.
• Experience building systems around LLMs or agentic workflows.
• Familiarity with model APIs, tool calling, context management, or agent loops.
• Good understanding of distributed systems and production reliability.
• Working knowledge of AWS.
• Strong problem-solving skills and comfort working through technical ambiguity.
• Someone who contributes beyond their own code through reviews, collaboration, and knowledge sharing.

Responsibilities

• Design and build production systems in Go, with work across React and TypeScript where needed.
• Improve agent execution, tool use, context management, streaming, and long‑running workflows.
• Extend our provider‑agnostic architecture as models and capabilities change.
• Build reliable integrations between agents, workspaces, tools, and developer infrastructure.
• Own projects from implementation through rollout and iteration.
• Contribute to design reviews, code reviews, and technical discussions.
• Partner with Product and Design to turn agent capabilities into useful developer experiences.
• Improve the reliability, performance, and operability of agentic systems.

Skills

Production systems experience

Distributed systems

Problem solving

Collaboration

Tools

Go

React

TypeScript

AWS

Kubernetes

Docker

Linux

Job description

Coder is building the next generation of AI development infrastructure. As a Senior Software Engineer on Coder’s Engineering team, you’ll develop and evolve production systems powering our agentic development experiences.

You’ll work across the agent harness, integrations, and workflows that connect agents with real development environments, while staying hands-on to solve complex technical problems. You’ll design and implement robust systems using Go and front-end work in React/TypeScript,