{"id":1000524,"url":"https://alion.io/job/octopus-energy-senior-full-stack-software-engineer","title":"Senior Full Stack Software Engineer","company":{"id":2332,"name":"Octopus Energy","domain":"octopus.energy","url":"https://alion.io/company/octopus-energy","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Lever","truth_index":{"grade":"B","score":77,"open_postings":49,"ghost_share":0,"stale_share":0.898,"repost_share":0.02,"time_to_fill_p50_days":43,"computed_at":"2026-10-03T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":85000,"max_usd":164000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":91},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"GraphQL","optional":false},{"name":"Next.js","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Rest-Assured","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true},{"name":"PostgreSQL","optional":true}],"status":"live","first_seen_at":"2025-04-09T08:21:06Z","employer_posted_date":"2025-04-09","last_verified_at":"2026-10-04T02:23:27Z","board_verified":true,"closed_at":null,"days_open":542,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":541},"description":"We’re looking for a Senior Fullstack Software Engineer (Python and React) to join our product and engineering team building the systems that power our ability to revolutionize the electric car leasing industry.\nOur tech stack is Python with GraphQL, React with Next.js, PostgreSQL and noSQL databases, running on AWS.\nWhat you'll do...\nWork within a dedicated cross-functional team on key products for our customers or our internal teams.\nBuild APIs and integrate with our own and third party services to optimise and automate processes.\nDevelop frontend applications to create experiences that wow our users.\nCreate performant systems that work consistently across modern browsers and devices.\nCare about the code you write and its future maintainability.\nContribute ideas, share knowledge, support, mentor, and raise the game of those around you.\nWhat you'll need...\nExpertise in Python and React.\nProficiency working with multiple data sources and designing expressive APIs using GraphQL.\nExperience working with design systems and component libraries.\nExcellent understanding of fundamental coding principles and best practices and experience applying these to create robust, scalable, maintainable software.\nProven experience of collaborating within teams and across disciplines.\nA track record of taking ownership of the development of features from inception through to delivery.\nAny of the following would be a bonus\nProficiency in TypeScript and Next.js.\nA working knowledge of AWS and infrastructure as code (IaC) practices.\nExperience with event driven architecture/systems (EDA).\nProduction experience with AI tech and tooling\nWhy you'll love it here\nDon't feel like you meet all of our hiring criteria? Thats OK, apply anyway! We'd love to hear from you and have a conversation.\nOctopus Electric Vehicles, part of the Octopus Energy Group, won the Sunday Times best company to work for in 2024. We were named 6th out of the top 100 start-ups to work for by Tempo in 2025 and on Glassdoor we were voted 50 best places to work in 2022. Our Group CEO, Greg has recordeda podcast about our culture and how we empower our people\nWondering what the salary for this role is? Just ask us! On a call with one of our recruiters it's something we always cover as we genuinely want to match your experience with the correct salary. The reason why we don't advertise is because we honestly have a degree of flexibility and would never want salary to be a reason why someone doesn't apply to Octopus - what's more important to us is finding the right octofit!\nOctopus Energy Group is a unique culture. An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co-owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about! Visit our perks hub - Octopus Employee Benefits\nThings to Note...\n just to let you know, we are dog friendly company so you may see our 4 legged friends in the offices - feel free to bring yours! Rest assured though, we've taken lots of precautions for those who have allergies\n We use AI to help us assess applications fairly and objectively. We’re totally fine with you using AI as a tool to help prepare too. That said, when we get to the interview and assessment stage, we’re really interested in hearing your unique perspective and real-world stories. 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