Staff Product Engineer in London

About Nous. Over 85% of households overpay on their bills. Our mission is to make people’s lives simpler and fairer, starting with the 30 million households here in the UK, and eventually, far beyond. Nous is the solution to this problem. We save our users money and time. We’re an AI-powered assistant that helps households manage and delegate managing their bills. We’re building one of the most ambitious consumer AI systems in the UK. We’re a well-funded start-up led by experienced entrepreneurs that’s growing rapidly. We’ve helped over 150,000 people since the cost-of-living crisis started. We’re a B Corp, formally accredited for social and environmental performance, transparency and accountability. Since launch mid-last year we’ve been rolling out our service through direct-to-consumers and via employers. We are growing over 10x year-on-year and have saved our customers over a half-million pounds recently. We’re office-first (based near Farringdon) to support high-context collaboration.

The role involves multiplying the efforts of strong Product Engineers by picking and leading big, cross-team bets that change how well we help members and how many people gain tangible value from Nous. This is a hands-on individual contributor role, not a people-management role. You’ll spend most of your time in code, system design and product thinking, but at a scope that cuts across teams and shapes company direction. There is space to grow into a people-management role down the line if desired.

How we build: We keep our stack simple and modern, while safe and boring in the right ways:

• Full-stack TypeScript, React, Postgres, and Temporal for long-running orchestration.
• Infra: AWS, Terraform, strong observability via Sentry and Datadog (full-stack, not just logs).
• Data: Snowflake, Omni, dbt, Fivetran, Amplitude and Segment with some custom tooling to understand how we help members.
• AI: we work with messy billing and usage data and have built agentic brains that can read, reason and act on behalf of members.
• Tools: Github, Linear, Graphite, and Blacksmith; we choose the best tool for the job and don’t obsess about specific technologies.

We ship to production daily, favour small, reversible changes, and keep a close eye on user impact.

What you’ll do:

• Own 2–3 high-leverage bets per year, not just projects.
• Turn fuzzy problems into clear plans. Start from messy reality (confusing renewal letters, incomplete data, stressed households) and define the problem, the metrics that matter, constraints, and a concrete technical approach.
• Ship small, end-to-end slices every 1–2 weeks. Design work so that real members feel the benefit often: a new flow, a clearer explanation, a safer orchestration. Each slice has a before/after we can actually look at.
• Be a domain owner in one or more critical areas (e.g., front-end, workflows/Temporal, infrastructure, agentic-AI core, data modelling). Set and evolve patterns and primitives that others build on, keeping them simple, understandable and teachable.
• Design paved roads for a small, fast team. Spot recurring problems and create stable contracts, libraries and workflows so others don’t have to reinvent them. You care about reliability and observability, but right-size them for a ~10-engineer-and-growing team.
• Act as a multiplier for other engineers. Mentor emerging tech leads and seniors, embed with teams when they’re stuck, and give reviews that teach patterns so people become stronger.
• Create written clarity around the work you lead. For big initiatives, have one canonical, skimmable doc that Product/Ops/Eng can rely on. You’ll report directly to the CTO and work with Product, Ops and leadership.

What Year One Might Feel Like:

• Re-design how new members see value.
• Take the journey from “upload a pile of bills” to “see an accurate and optimal recommendation” and cut it in half with better flows and smarter document understanding.
• Invent and roll out a standard pattern for long-running switches (e.g., agent asks a user on WhatsApp for missing info, user replies, workflows continue).
• Own the front-end platform or another core domain, improving routing, data fetching, error handling and state management to help engineers ship polished, accessible UI quickly.

How this role is different? Compared with a Product Engineer, as Staff you:

• Operate at the level of company bets, not just team projects.
• Define and evolve the patterns other engineers rely on, rather than just using them.
• Change how engineering works across Nous, not just within one squad.
• Are expected to grow other leaders, not just ship more yourself.

If that step up in scope and leverage – while staying deeply hands-on – sounds like your sweet spot, you’ll probably enjoy this.

Remuneration And Benefits: Compelling packages, including meaningful share options with life-changing upside. An environment where you can do your best work:

• A great office setup for collaborative working.
• The equipment and training you need, including AI subscriptions.
• A high-context environment with exposure to big decisions.
• Flexible remote work.
• Very good coffee and a well-stocked kitchen.
• Informal social events and a summer and Christmas gathering.
• 33 days paid holidays.