Senior Product Engineer, Full Stack - Energy£70,000 to £95,000PermanentLondon, hybridThe opportunityOur client is hiring a Senior Product Engineer, Full Stack, to help build the next generation of customer-facing software in the energy market.Operating in a complex, high-value sector, the business is combining technology, data, and product thinking to modernise an area of the energy industry that has historically been underserved by great software.We have already placed 3 people into the business and are pleased to be supporting them again on this important hire.This is a genuinely exciting opportunity for a frontend-strong engineer who wants real ownership, autonomy, and the chance to build products from scratch. They are looking for someone with strong React and TypeScript capability, alongside solid backend exposure across Python, APIs, and databases.As a Senior Product Engineer, Full Stack, you will play a key role in shaping what gets built, how it is built, and how it evolves as the business scales. For the right person, this is a chance to join a growing company at the right stage and make a visible impact.The role is based in Mayfair, London, with a hybrid setup of 2 to 3 days per week in the office.The roleThis Senior Product Engineer, Full Stack role has a clear frontend lean.They need someone who can build high-quality frontend products from scratch, while also working confidently across backend services, integrations, and data-driven workflows. The frontend is a central part of the brief, but they want someone who understands the wider system and can contribute beyond the UI.The product sits in a data-rich environment, with workflows across billing, metering, reporting, consumption, and asset performance. They need an engineer who can take complexity and turn it into clean, reliable software that customers genuinely value.This is a high-ownership role in a growing team, well suited to someone who enjoys pace, autonomy, and being trusted to deliver.What you will be doingBuilding customer-facing products from scratch using React, TypeScript, and modern frontend toolingOwning frontend quality, user experience, and engineering standardsContributing across the stack, including backend integrations, APIs, product logic, and Python-based servicesWorking with SQL, Databricks, and related data systemsTurning complex operational and commercial workflows into clear product experiencesCollaborating closely with product, engineering, data, and leadershipHelping shape technical standards and architecture as the team growsWhat they are looking forStrong React and TypeScript experienceA frontend-strong engineer who can build products from scratchSolid backend exposure, ideally with PythonExperience with databases and data platforms such as SQL and DatabricksExperience building customer-facing software in a commercial environmentStrong product instincts and a practical, hands-on approachComfortable with ownership, pace, and autonomyNice to haveEnergy, trading, or fintech experienceStartup or scale-up backgroundData visualisation experienceInterest in AI tools and modern engineering practicesWhy joinHigh ownership from day oneThe chance to build frontend products from scratchReal influence over product and technical directionBroad exposure across frontend, backend, data, and productStrong long-term growth potential as the business scalesSummaryThis is a strong opportunity for a Senior Product Engineer, Full Stack who wants to build meaningful products in the energy market, with real autonomy and scope to grow.If you are strong in React and TypeScript, but also comfortable across backend systems, Python, APIs, and data platforms, this role offers the chance to make a genuine impact in a growing business.JBRP1_UKTJ