Staff Software Engineer, Agentic Systems Lead

Jackalope Digital LLC; United Kingdom; Remote; GBP 113,000 - 170,000; Full time

Job summary

Coder is seeking a Staff Software Engineer to shape the systems behind our agentic development experience. You’ll lead across the agent harness, integrations, and workflows connecting agents with real development environments, while staying hands-on and setting the team's technical direction.

You’ll design production systems in Go and work across React/TypeScript, evolve agent execution, tool use, and context management, and lead projects from ambiguity to production, mentoring others along the

Qualifications

• Deep experience building and operating production software systems.
• Strong hands-on experience with Go.
• Experience with React and TypeScript.
• Hands-on experience building systems around LLMs and agentic workflows.
• Experience with model APIs, tool calling, context management, or agent loops.
• Strong distributed systems knowledge.
• Working knowledge of AWS.
• Track record of setting technical direction without formal authority.
• Strong architectural judgment and comfort working through ambiguity.
• Makes engineers around them better.

Responsibilities

• Set technical direction across Coder’s agent harness, integrations, and workflows.
• Design and build production systems in Go, with work across React and TypeScript where needed.
• Evolve agent execution, tool use, context management, streaming, and long-running workflows.
• Extend our provider-agnostic architecture as models and capabilities change.
• Lead complex projects from early ambiguity through production.
• Raise the engineering bar through design reviews, code reviews, and technical mentorship.
• Partner with Product and Design on clear, useful agent experiences.
• Improve the reliability, performance, and operability of agentic systems.

Skills

Production software

Go

React

TypeScript

LLMs

Model APIs

Distributed systems

AWS

Architectural judgment

Ambiguity handling

Tools

Go

React

TypeScript

AWS

Kubernetes

Docker

Job description

Coder is seeking a Staff Software Engineer to shape the systems behind our agentic development experience. You’ll lead across the agent harness, integrations, and workflows connecting agents with real development environments, while staying hands-on and setting the team's technical direction.

You’ll design production systems in Go and work across React/TypeScript, evolve agent execution, tool use, and context management, and lead projects from ambiguity to production, mentoring others along the