Principal AI Product Engineer - End-to-End Agent Workflows

Uniti AI; Greater London; Hybrid; GBP 140,000 - 190,000; Full time

Benefits offered by this job

Competitive salary with equity options

Medical, Dental and Vision premiums 0

Snacks and a generous tech budget

Unlimited vacation and company outings

Job summary

Uniti AI is seeking a Staff/Principal Product Engineer to own problems end to end—from discovery with customers to shipping proofs of concept and MVPs. This is deep systems and AI work, not a frontend role, and you will work across discovery and codebase to prove ideas for the core product.

This role reports to the Head of Product and sits with our platform engineering team. If you prefer long-term architecture and scale, consider our Staff/Principal Software Engineer opening instead.

Qualifications

• 8+ years building and shipping production software with end-to-end ownership.
• Experience as a founder, founding engineer, or product engineer at an early-stage company.
• Strong backend engineering skills with Python and TypeScript.
• Full stack capability to build a working interface when needed.
• Comfort with ambiguity: define problems and deliver running solutions.
• Experience with LLM-based systems, agents, or agentic workflows in production.
• Experience with AI coding tools like Cursor and Claude Code.
• Based in or able to work hybrid from New York City or London.
• Fluency in English is required.

Responsibilities

• Own the full arc of a product bet: research and discovery, customer and data analysis, scoping, then building the proof of concept or MVP yourself.
• Work directly with customers and the go-to-market team to understand where our agents fall short and what would move the needle.
• Design and build agentic workflows, agent harness improvements, tool integrations, and the backend systems behind them.
• Make the call on what to build, what to cut, and what to kill, backed by evidence rather than opinion.
• Hand off proven prototypes to the platform engineering team, or productionize them yourself when that’s the faster path.
• Set the bar for how we evaluate agent quality: evals, instrumentation, and the metrics that tell us whether something actually works.
• Collaborate directly with the Head of Product and the founders on product direction and technical strategy.
• Debug and solve problems across the stack, no “not my job” mentality.

Skills

Python

TypeScript

Full stack

LLM-based systems

AI tooling (Cursor, Claude Code)

Founder/early-stage experience

Ambiguity handling

English fluency

Tools

AWS

Cursor

Claude Code

Messaging infra

Job description

Uniti AI is seeking a Staff/Principal Product Engineer to own problems end to end—from discovery with customers to shipping proofs of concept and MVPs. This is deep systems and AI work, not a frontend role, and you will work across discovery and codebase to prove ideas for the core product.

This role reports to the Head of Product and sits with our platform engineering team. If you prefer long-term architecture and scale, consider our Staff/Principal Software Engineer opening instead.