{"id":52587,"url":"https://alion.io/job/capital-on-tap-mobile-and-backend-software-engineer-banking","title":"Flutter Engineer - Banking","company":{"id":12307,"name":"Capital on Tap","domain":"capitalontap.com","url":"https://alion.io/company/capital-on-tap","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":82,"open_postings":19,"ghost_share":0,"stale_share":0.474,"repost_share":0.053,"time_to_fill_p50_days":65,"computed_at":"2026-10-30T05:48:23Z"}},"role":"Mobile","role_family":"Mobile","seniority":null,"employment_type":null,"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":63000,"max_usd":162000,"period":"year","method":"role_country_seniority_unknown","sample_n":29},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"Codemagic","optional":false},{"name":"Dart","optional":false},{"name":"Flutter","optional":false},{"name":"Kotlin","optional":false},{"name":"Octopus Deploy","optional":false},{"name":"Swift","optional":false},{"name":"Azure","optional":true},{"name":"Firebase","optional":true},{"name":"Firestore","optional":true},{"name":"GCP","optional":true},{"name":"Go_router","optional":true},{"name":"Riverpod","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-06-30T18:18:04Z","employer_posted_date":"2026-09-23","last_verified_at":"2026-10-30T03:33:24Z","board_verified":true,"closed_at":null,"days_open":121,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":120},"description":"We’re Capital on Tap\n Capital on Tap started because small businesses were underserved. Big banks were slow, their products weren't fit for purpose, and small business owners often couldn't access what they needed. We set out to fix that.\nToday we're a financial platform - not just a credit card company. We offer a best-in-class business credit card, SME-focused spend management platform, a savings product that hit £1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier. \n1,000+ employees, £20bn in annual card spend, 200,000+ customers, 17,000+ Trustpilot reviews averaging 4.7 stars, and we're profitable. We’ve done a pretty good job so far, but we’re just getting started! \nThis is a Hybrid role, the team work from our London Offices 2 days per week.\nThe Team\nThe Banking and Repayments teams sit at the heart of Capital on Tap's product, owning the core account experience for thousands of small business customers. Banking manages account operations, transaction lifecycles, balance management, ClearBank integration, and savings. Repayments owns the repayment rails, including the most recent open banking repayments. \nWe value engineers who take genuine ownership, work autonomously, and bring depth across the stack. This is a high-priority hire with real impact from day one.\nWhat You'll Be Doing\nAs a Senior Flutter Engineer, you'll own the mobile and work on the back-end systems that power our Banking and Repayments platform, helping transition mobile and front-end ownership from our Customer Experience team into Banking.\nOwn the full SDLC - from feature inception through to production, monitoring, and continuous improvement\nContribute to mobile development across iOS and Android using Flutter, Kotlin, and/or Swift\nCollaborate with Product, Design, and QA from early feature shaping through to delivery\nWrite thorough unit and integration tests and uphold high engineering standards\nIdentify bottlenecks and drive improvements across the team\nWork cross-functionally, bridging technical decisions with business goals\nWhat We're Looking For\nMobile development experience in Flutter/Dart, Kotlin, or Swift - this is a firm requirement\nStrong back-end engineering experience\nSolid testing practice across unit and integration testing\nExperience with CI/CD platforms such as CodeMagic or similar\nComfortable working in Agile environments\nAutonomous and collaborative - you take ownership and see things through\nOur Tech Stack\nMobile: Flutter, Dart, Riverpod, GoRouter, Kotlin, Swift\nDatabases: SQL Server, MongoDB, Firestore\nCloud: GCP (Firebase) and Azure\nCI/CD: CodeMagic\nDiversity & Inclusion \nWe welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work.\nGreat Work Deserves Great Perks\nWe try not to take ourselves too seriously (all the time) so we make sure our office is decked out with a pool table, arcade machine, beer tap, and a couple of office dogs thrown in for good measure. Check out our benefits:\nPrivate Healthcare including dental and opticians services through Vitality\nWorldwide travel insurance through Vitality\nAnniversary Rewards (£250, £500, £750, 4-week fully paid sabbatical)\nSalary Sacrifice Pension Scheme up to 7% match\nOctopus EV Salary Sacrifice Scheme\n28 days holiday (plus bank holidays)\nAnnual Learning and Wellbeing Budget\nEnhanced Parental Leave\nCycle to Work Scheme\nSeason Ticket Loan\n6 free therapy sessions per year\nDog Friendly Offices\nFree drinks and snacks in our offices\nCheck out more of our benefits, values and missionhere.\nOther Info\n Check out our ‘Top Tips’ for interviewing.\nKeep updated on new job opportunities by following us on Linkedin.\nEmail  if you have any questions.\nExcited to work here? Apply!\n If you’d like to progress your career within our fast growing, profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.)","description_format":"text","description_chars":4133,"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":["Parental leave","Pet friendly"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services","Cards & Card Issuing","Business & SME Lending","Procurement & Spend Management"],"lifecycle":[{"event":"open","at":"2026-06-30T18:18:04Z"},{"event":"close","at":"2026-09-04T10:56:09Z"},{"event":"reopen","at":"2026-09-23T09:18:33Z"}],"visa":[],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.469,"p_room":0.45,"age_days":121,"expected_fill_days":65,"reasons":["conf:2","velocity","win:tail"],"computed_at":"2026-10-30T05:48:23Z"},"pay":null,"html_url":"https://alion.io/job/capital-on-tap-mobile-and-backend-software-engineer-banking","json_url":"https://alion.io/job/capital-on-tap-mobile-and-backend-software-engineer-banking.json","meta":{"generated_at":"2026-10-30T06:59:19Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":9901,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-31T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":12307},"rest":"https://alion.io/mcp/rest/get_company?id=12307"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcapital-on-tap-mobile-and-backend-software-engineer-banking"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcapital-on-tap-mobile-and-backend-software-engineer-banking"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcapital-on-tap-mobile-and-backend-software-engineer-banking"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/capital-on-tap-mobile-and-backend-software-engineer-banking\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcapital-on-tap-mobile-and-backend-software-engineer-banking"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":52587}},{"tool":"search_jobs","arguments":{"company":"capitalontap.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":52587},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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