Back End Developer

Senior Backend EngineerBuild the Decision Engine Powering Modern FinanceBay Area (Hybrid) | NYC consideredUp to $250K base + equityVisa sponsorship availableRebuilding Finance From First PrinciplesA high-growth, VC-backed fintech is re-engineering the $13T U.S. mortgage market, not by improving legacy systems, but by replacing them entirely.They're building a vertically integrated platform that automates:CreditUnderwritingComplianceCapital flowsThe result? Complex, manual processes transformed into deterministic, scalable software systems.Already in production and used by lenders, banks, and fintech's, this platform powers real financial decisions at scale.Why This Role Stands OutYou'll be building core financial infrastructure where:Precision mattersEdge cases are the productMistakes have real-world consequencesYou'll encode complex financial logic into systems that make high-stakes, automated decisions every day.What You'll Be Responsible ForTranslating dense, rule-heavy domain logic into elegant backend systemsDesigning and implementing decisioning engines and underwriting infrastructureBuilding and evolving DSLs (Domain-Specific Languages) to encode financial rulesWorking closely with domain experts to capture nuance, exceptions, and edge casesDesigning for correctness, observability, and failure resilienceApplying AI within real production workflows (not experiments)What They're Looking ForCore Requirements3+ years backend engineering experience (mid–senior level)Strong TypeScript and backend systems design experienceProven ability to build production-grade, reliable systemsExperience working with complex business logic or rule-heavy domainsComfortable collaborating with non-technical stakeholdersStrong Signals (Highly Valued)Background in FinTech, payments, or regulated systemsExperience at a VC-backed Start-up or as a founding engineerExposure to high-performance environments (top tech / big tech also valued)Experience designing or working with DSLs for rule encoding (major plus)Familiarity with rule engines, workflow orchestration, or decision systemsExposure to AI / agent-driven systems in productionThe Kind of Engineer Who Thrives HereYou enjoy turning messy real-world problems into structured systemsYou think in edge cases, constraints, and failure modesYou prefer ownership over ticketsYou're comfortable operating in ambiguity and moving quicklyYou've worked in environments where impact > processThe EnvironmentLean, high-calibre engineering teamMultiple complex backend problem spaces (core logic, APIs, integrations)Hybrid model (2–3 days in-office, flexibility for top candidates)Fast iteration, high ownership, low bureaucracyThe reality:You build it → you own itGood ideas ship quicklyThe problems are genuinely hardCompensation & Benefits$150K–$250K base (flexible for exceptional candidates)Meaningful equityVisa sponsorship available (including new H-1B applications)Probably Not a Fit IfYou prefer low-impact or maintenance-heavy workYou've mainly worked in slow-moving, legacy environmentsYou want fully defined tickets instead of open-ended problemsThe Bottom LineThis is a rare chance to:Build core financial infrastructure from the ground upWork on systems where every decision has real monetary impactShape how complex financial rules are encoded, automated, and scaledJoin a VC-backed fintech at a stage where architecture still mattersReady to Build Systems That Actually Decide Things?If you've operated in fintech, high-growth start-ups, or as a founding engineer, and you're excited by complex backend systems + DSL-driven logic, this is exactly the kind of challenge you've been looking for.Apply now.