Senior Software Engineer - Pricing

tem is rebuilding energy transaction infrastructure with AI. They are hiring a Senior Software Engineer for the Pricing squad to build the pricing engine for their utility product RED. The role is backend, data-heavy with a quant focus.

• Build with impact: design and ship components of the Pricing API that price real energy contracts, owning work from design through to production.
• Make it fast: help bring the time to a first customer price down dramatically, without sacrificing accuracy.
• Own reliability: build the error handling, observability and alerting that make pricing fail loudly and explainably, never silently.
• Sharpen the boundaries: extract and consolidate pricing logic so the pricing engine owns its own behaviour end-to-end.
• Close the loop: take your turn handling live pricing questions and incidents, and turn what you learn into structural fixes.

• Production backend Python: you have shipped and run an API in production and been on the hook when it broke.
• Comfortable with FastAPI and SQL, and with data- and analytics-heavy systems where the correctness of numbers matters.
• Product engineering nous: you ask what the price is for and who reads it, not just how to compute it.
• You build with agents: Claude or similar is part of your daily workflow for writing, testing and reviewing code.
• You can own a project end to end - scoping, delivery, quality - with a tech lead as a sounding board rather than a supervisor.
• Domain knowledge from fintech, energy pricing or neo-utilities, or ad-tech.
• Experience working inside or alongside machine learning teams.
• AWS and serverless patterns (Lambda, event-driven services, Postgres on RDS).
• Polars, or a taste for making numerical code fast.

• Competitive salary - our current band for this role is [salary band] or equivalent in local currency.
• Stock options so everyone has ownership in our mission.
• 25 days holiday plus public holidays. Swap public holidays for the ones that matter most to you, and enjoy your birthday off.
• Remote first and flexible working, with clear core hours and no internal meetings on Friday afternoons.
• Up to GBP1,200 or EUR1,400 per year for your remote setup.
• Up to GBP150 or EUR170 per month for wellbeing.