{"id":1116027,"url":"https://alion.io/job/thought-machine-senior-full-stack-engineer-3","title":"Senior Full Stack Engineer","company":{"id":7206,"name":"Thought Machine","domain":"thoughtmachine.net","url":"https://alion.io/company/thought-machine","size_band":"51-200","is_staffing_agency":true,"is_intermediary":false,"ats_vendor":"Ashby","truth_index":{"grade":"A","score":91,"open_postings":24,"ghost_share":0,"stale_share":0.167,"repost_share":0,"time_to_fill_p50_days":62,"computed_at":"2026-09-24T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":111000,"max_usd":221000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":87},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"AWS","optional":true},{"name":"Figma","optional":true},{"name":"Go","optional":true},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"Python","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-09-22T14:54:10Z","employer_posted_date":"2026-09-22","last_verified_at":"2026-09-24T06:39:56Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Thought Machine's mission is bold - to properly and permanently rid the world's banks of legacy technology. To achieve this, we have developed the foundations of modern banking through core and payments technology which run natively in the cloud. What we are attempting is hard and means we need great people working together to build great technology.\nWe have grown rapidly in the past few years - growing our team to more than 550 individuals across offices in London, New York, Singapore, Sydney and our newly established Engineering Hub in Lisbon. We have raised more than £500m in funding and our investors include Molten Ventures, Eurazeo, Intesa Sanpaolo, Temasek, Nyca Partners, JPMorgan Chase Strategic Investments, Standard Chartered Ventures, and more.\nWe have created a culture that enables our team to produce the best work in the industry while ensuring we have fun along the way. We're regularly cited as having a fantastic workplace culture and have been recognised by Sifted magazine as having one of the highest Glassdoor ratings for a UK fintech company and the industry's most generous employee share package. Named one of the world's most innovative fintechs by Global Finance Magazine, we were also recognised by the Financial Times as one of Europe's fastest-growing companies for two consecutive years-and a UK Best Employer for 2026.\nSoftware Engineering is a key role within Thought Machine. As an engineering-focused company, we take pride in our engineering excellence, adopting best practices, and utilising modern technologies.\nThought Machine software engineers work across the stack to solve complex engineering problems that have not been solved before. As a result, while development at Thought Machine is fast-paced, you will be expected to develop code to the highest standards that scales, is secure, performant, and provides a great user experience. Software Engineers will take complete ownership of a requirement, converting it into an engineering design, task breakdown, and implementation. You’ll be responsible for building both backend services and frontend experiences.\nOur clients range from the world’s largest financial institutions to smaller regional banks. Our systems must cater to each of these use cases, so we care deeply about providing the ability to configure and customise the user experience based on the client's or end user's persona. Software engineers are expected to bridge the gap between back-end and front-end, crafting delightful experiences that delight all our clients.\nThis is a full-time, permanent position based in our London office, requiring three days a week onsite, with the option to work four days per week, which includes an additional financial allowance.\nDuties\nDesign and implement end-to-end features across the stack, including web applications and backend services.\n\nEnsure your solutions are delivered with security, performance, scale, and user experience in mind.\n\nWrite automated unit, integration, acceptance tests, etc.\n\nInterface with other engineering teams to ensure that features are added in a structured and coherent way.\n\nManaging and debugging your features from testing environments to production.\n\nTranslating customer requirements into a clear plan that can be delivered via tasks.\n\nCollaborating as part of a cross-functional team of backend, front-end, and full-stack engineers.\n\nEssential\nExperience with React and TypeScript.\n\nProficiency in writing modern web applications.\n\nExperience writing REST APIs and services.\n\nA keen eye for detail and a passion for writing clean, readable, properly tested code.\n\nExperience in integrating automated tests into the development lifecycle.\n\nInterest in client-facing projects, including scoping requirements and defining deliverables.\n\nA proactive approach to learning and development.\n\nDesirable\nKnowledge of banking/finance.\n\nExperience with AWS or other cloud providers.\n\nProficiency in Golang or Python.\n\nAn understanding of both UX and UI principles.\n\nExperience using Figma and UI frameworks.\n\nVisual design skills.\n\nFamiliar with databases (SQL or NoSQL).\n\nExperience with client/server software architectures & networking, or microservice architectures.\n\nExperience using Kubernetes.\n\nBenefits\nHighly competitive salary\n\nPension plan (match up to 5%)\n\nLife insurance - three times annual salary\n\nCompetitive maternity (six months fully paid) and paternity leave (four weeks fully paid)\n\nShared parental leave (matched to our maternity leave for the same point in time)\n\n25 days holiday and bank holidays\n\nFlexible working hours\n\nCycle-to-work scheme\n\nElectric car scheme\n\nSeason ticket loan\n\nAccess to outstanding learning materials and courses\n\nSports and hobby clubs, subsidised by Thought Machine\n\nAll the latest tech you need\n\nStart the day properly with fresh fruit and cereals\n\nHuge range of healthy (and not-so-healthy) snacks, smoothies and drinks\n\nA talented and experienced team as your colleagues\n\nAn environment where we encourage learning and progress\n\nTwo charity days a year\n\nWeekly food pop-up\n\nWe actively hire candidates who demonstrate technical excellence in their field and welcome people of all ages and backgrounds, providing everyone with equal access to professional development. You are encouraged to apply even if your experience doesn't accurately match the job description. We also encourage applications from those with different abilities, including candidates with ADHD, autism, dyslexia or dyspraxia.","description_format":"text","description_chars":5492,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Life insurance","Parental leave","Professional development"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services"],"lifecycle":[{"event":"open","at":"2026-09-22T15:46:36Z"}],"liveness":{"score":54,"band":"ok","label":"Likely open","p_open":1,"p_active":0.542,"p_room":1,"age_days":1,"expected_fill_days":62,"reasons":["conf:0","agency","velocity","win:early"],"computed_at":"2026-09-24T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/thought-machine-senior-full-stack-engineer-3","json_url":"https://alion.io/job/thought-machine-senior-full-stack-engineer-3.json","meta":{"generated_at":"2026-09-24T06:48:51Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}