{"id":1663242,"url":"https://alion.io/job/kikoff-senior-fullstack-engineer-user-retention-app-ecosystem","title":"Senior Fullstack Engineer - User Retention & App Ecosystem","company":{"id":171844,"name":"Kikoff","domain":"kikoff.com","url":"https://alion.io/company/kikoff","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":84,"open_postings":18,"ghost_share":0,"stale_share":0.444,"repost_share":0,"time_to_fill_p50_days":72,"computed_at":"2026-10-07T05:47:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["San Francisco, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":244000,"max":292000,"currency":"USD","period":"year","gross":null,"usd_annual":292000},"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","optional":false},{"name":"React.js","optional":false},{"name":"SOC 2","optional":false},{"name":"JavaScript","optional":true},{"name":"MySQL","optional":true},{"name":"Ruby","optional":true},{"name":"Ruby on Rails","optional":true}],"status":"live","first_seen_at":"2026-10-02T00:53:49Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-08T00:37:56Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"Kikoff: The Fintech Powering Financial Security at Scale\nKikoff is a profitable, pre-IPO fintech company on a mission to empower everyone to achieve financial security. With record revenue growth in 2025 and a unicorn valuation, we've built a suite of products that help millions of people build credit, access liquidity, and save money.\nWe're scaling fast. Join us if you want to build something meaningful and help millions of people move forward financially.\nWhy Kikoff:\nThis is a consumer fintech startup, and you will be working with serial entrepreneurs who have built strong consumer brands and innovative products. We value extreme ownership, clear communication, a strong sense of craftsmanship, and the desire to create lasting work and work relationships. Yes, you can build an exciting business AND have real-life real-customer impact.\nAbout the team\nThe User Retention and App Ecosystem team focuses on sustainable, long-term, and interconnected customer growth at Kikoff. We help customers stay around longer and get more value from their subscriptions. We ensure that customers are excited to explore the different consumer fintech apps across Kikoff’s growing ecosystem, with as little cross-app friction as possible.\nWe’re looking for a Senior Fullstack Engineer to drive user-facing projects, improve existing core services, and own product domains. If you like owning both the work and the outcome of a complex project end-to-end, we’d like to talk to you!\nWhat you’ll be doing\nLead and implement data-driven and impact-focused projects around user-retention and ecosystem integration end-to-end, affecting millions of users.\nBe the definitive technical owner for 1 to 2 large product areas across credit report retrieval, credit disputes, customer off-boarding experience, and cross-app integration.\nEnhance observability, reliability, and operational excellence across existing services.\nWhat we’re looking for\nB.A. / B.S. / M.S. or strong self-taught fundamentals in computer science\n6+ years of industry experience, or high-slope growth, with demonstrated breadth and depth of product impact\nStrong fullstack development experience with a backend focus: proficient or highly proficient on the backend, and experienced in either web frontend (React) or mobile (Flutter preferred)\nStrong cross-functional communication and coworking skills with product, data, design, and legal partners\nDemonstrated ability to own and drive complex projects end-to-end, coordinating focused teams through ideation, requirements, design, implementation, launch, and post-launch.\nGood judgment in identifying and choosing trade-offs between business impact, delivery speed, and long-term operational excellence\nStrong system design skills for both new and existing systems\nAn ideal candidate also shows\nExperience with financial infrastructure or regulated environments (credit bureau data, PII, SOC2)\nBackground in fintech, payments, or lending infrastructure\nExperience integrating third-party APIs reliably and communicating with technical vendors\nExperience with classical ML model training and production deployment\nExperience with observability, monitoring, and alarms in customer-facing systems\nExperience with using business metric focused A/B tests and experiments for new features\nExperience in leveling up the team through code reviews, design docs, and technical guidance\nThoughtful use of AI tools to accelerate delivery while maintaining operational excellence\nEagerness for product and feature ideation\nExperience with our stack is a plus: Ruby on Rails, React, Flutter, MySQL\nBase Range\n$244,000—$292,000 USD\nEqual Employment Opportunity Statement\nKikoff Inc. is an equal opportunity employer. We are committed to complying with all federal, state, and local laws providing equal employment opportunities and considers qualified applicants without regard to race, color, religion, creed, gender, national origin, age, disability, veteran status, marital status, pregnancy, sex, gender expression or identity, sexual orientation, citizenship, or any other legally protected class.\nPlease reference the following for more information.","description_format":"text","description_chars":4151,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"master","optional":false},"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Personal Finance Apps & Education","Consumer Loans & Pawnshops"],"lifecycle":[{"event":"open","at":"2026-10-02T04:46:13Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 28 · green card filings: 6","filings_12m":28,"filings_prev_12m":12,"green_card_filings_12m":6,"median_offered_wage_usd":192794,"route":null,"cap_exempt":false,"checked_at":"2026-10-03T21:08:04+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":11}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":5,"expected_fill_days":72,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-07T05:47:15Z"},"pay":{"stated_usd_annual":292000,"is_top_pay":true},"html_url":"https://alion.io/job/kikoff-senior-fullstack-engineer-user-retention-app-ecosystem","json_url":"https://alion.io/job/kikoff-senior-fullstack-engineer-user-retention-app-ecosystem.json","meta":{"generated_at":"2026-10-08T02:12:35Z","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","counted_by":"address","units_charged":1,"used_today":3908,"day_limit":5000,"remaining_today":1092,"minute_limit":60,"resets_at":"2026-10-09T00:00:00Z"}},"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":171844},"rest":"https://alion.io/mcp/rest/get_company?id=171844"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fkikoff-senior-fullstack-engineer-user-retention-app-ecosystem"},{"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%2Fkikoff-senior-fullstack-engineer-user-retention-app-ecosystem"},{"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%2Fkikoff-senior-fullstack-engineer-user-retention-app-ecosystem"},{"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/kikoff-senior-fullstack-engineer-user-retention-app-ecosystem\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkikoff-senior-fullstack-engineer-user-retention-app-ecosystem"}]}