{"id":2908208,"url":"https://alion.io/job/thefrenchsourcer-senior-backend-engineer-2","title":"Senior Backend Engineer","company":{"id":4451662,"name":"The French Sourcer","domain":"thefrenchsourcer.com","url":"https://alion.io/company/thefrenchsourcer","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Manatal","truth_index":null},"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":170000,"max":250000,"currency":"USD","period":"year","gross":null,"usd_annual":250000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"ETL/ELT","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Python","optional":false},{"name":"Slack","optional":false},{"name":"Snowflake","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-20T08:38:43Z","employer_posted_date":"2026-10-20","last_verified_at":"2026-10-27T03:46:17Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"Senior Backend Engineer - San Francisco\nSan Francisco, CA, United States · Full-time · On-site\nOwn backend systems where a bug doesn't just break a feature, it touches real money moving through real credit decisions.\nWhat you'd actually work on\nBuilding and owning production backend systems for core payments and credit workflows, using TypeScript and Node.js end to end\nDesigning APIs, services, data models, and contracts that other teams (data science, risk, product) depend on daily, where \"good enough\" stops being good enough once real transactions are on the line\nCreating internal tools that let non-engineering teams review decisions, trace data lineage, and move faster without pinging an engineer every time something looks off\nTaking ambiguous, loosely defined problems and turning them into shipped, production-grade slices rather than waiting for a fully scoped ticket\nImproving reliability and latency on systems where downtime or a bad edge case has a direct, visible cost, not just a Slack complaint\nWorking cross-functionally with risk and data science to define what data actually needs to look like before it hits a decisioning model\nOwning the full lifecycle from architecture decisions through to production support, not handing off after the first deploy\nWhere it gets technically interesting\nA TypeScript and Node.js backend where correctness isn't optional. This stack directly powers payment and credit decisions, so tradeoffs get scrutinized differently than in a typical SaaS product\nServerless architecture on AWS (Lambdas), which means thinking hard about cold starts, statelessness, and failure isolation rather than defaulting to a monolith\nA PostgreSQL data layer feeding into Snowflake for downstream analytics and modeling, so schema decisions have consequences well past your own service\nDesigning systems and data contracts from close to zero: the infrastructure is still being defined, so you'll shape patterns other engineers will follow, not just extend someone else's work\nClose, regular collaboration with a data science team turning your APIs and data pipelines into production, ML-driven decisions, which raises the bar on what \"clean data\" actually means\nReal production stakes from day one: the systems you touch are already live with paying enterprise customers, not waiting on a future launch\nWhat we're looking for\n5 to 12 years of backend engineering experience, including real production ownership, not just feature work inside someone else's system\nStrong hands-on experience with TypeScript in production, plus solid SQL and relational database skills\nDirect experience in payments, fintech, or credit and risk systems, ideally at a fast-growing, VC-backed company\nComfort with AWS, serverless architecture (Lambdas), and designing for reliability at scale\nA track record of owning a project or product area end to end: defining the problem, proposing the approach, shipping it, and iterating\nExperience collaborating across risk, data science, and engineering, not just within a single team's boundaries\nBonus: Python proficiency and experience with data pipelines, ETL, or Snowflake\nThe company\nAn AI-native fintech company building credit and payments infrastructure for B2B commerce, backed by top-tier venture investors with $250M+ raised to date. A lean engineering team of around 30 to 40 people, already powering payment and credit workflows for enterprise customers in live production, not in beta. This role sits close to the founding team and works directly with risk and data science on some of the company's highest-stakes systems.\nCompensation: $170,000 to $250,000 base, plus competitive equity\nLanguages: English (fluent, professional)\nA search run by The French Sourcer, recruitment built for technical teams.","description_format":"text","description_chars":3780,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Equity"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-20T08:38:43Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":6,"expected_fill_days":35,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-27T05:46:45Z"},"pay":{"stated_usd_annual":250000,"is_top_pay":true},"html_url":"https://alion.io/job/thefrenchsourcer-senior-backend-engineer-2","json_url":"https://alion.io/job/thefrenchsourcer-senior-backend-engineer-2.json","meta":{"generated_at":"2026-10-27T07:21:05Z","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":7845,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"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":4451662},"rest":"https://alion.io/mcp/rest/get_company?id=4451662"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fthefrenchsourcer-senior-backend-engineer-2"},{"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%2Fthefrenchsourcer-senior-backend-engineer-2"},{"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%2Fthefrenchsourcer-senior-backend-engineer-2"},{"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/thefrenchsourcer-senior-backend-engineer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fthefrenchsourcer-senior-backend-engineer-2"}]}