{"id":745390,"url":"https://alion.io/job/openfx-senior-backend-engineer-l3-payments","title":"Senior Backend Engineer (L3) - Payments","company":{"id":6134,"name":"OpenFX","domain":"openfx.com","url":"https://alion.io/company/openfx","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":90,"open_postings":15,"ghost_share":0,"stale_share":0.2,"repost_share":0,"time_to_fill_p50_days":186,"computed_at":"2026-10-26T05:57:25Z"}},"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":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":18000,"max_usd":42000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":168},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Next.js","optional":false},{"name":"Node JS","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-08-25T14:57:33Z","employer_posted_date":"2026-08-25","last_verified_at":"2026-10-26T17:47:52Z","board_verified":true,"closed_at":null,"days_open":62,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":62},"description":"About Us\nOpenFX is on a mission to move money as freely as data, unrestricted by time zones, banking hours, or legacy systems. We are building the infrastructure that will power the next generation of cross-border payment systems for institutions. The team's execution has been exceptional, and we're scaling at a remarkable pace. Our stellar early team comes with experience in companies like J.P. Morgan, Goldman Sachs, FalconX, PayPal, Affirm, Polygon, Kraken, Nium & others. We're backed by Accel, Lightspeed, NfX and other top-tier investors.\nRole Overview\nWe're hiring a backend-heavy Full Stack Engineer for our Payments team - the team that owns how money actually moves for our clients.\nPayments owns corridor expansion (EUR, MXN, COP, AED, and beyond), the operationalization of our EU licenses (safeguarding of customer funds, transaction monitoring), and the payments product across GUI and API. Our north star is payment volume moved reliably, with corridor success rate and on-time settlement as the control metrics.\nYou will own the systems on that money path. This is where a client's payment gets initiated, routed to the right partner, tracked through cut-offs and settlement, and reconciled - and where a failure is not a bug ticket but stuck money. You will own the backend of these flows - partner integrations, payment lifecycle state machines, webhooks, retries, and idempotency - and be trusted with the correctness of what actually happens to the money.\nYou will also work across the stack. The payments product ships on both API and GUI surfaces, and you'll build the dashboard views your backend powers - payment status, tracking, reporting - rather than waiting on someone else to unblock you. You don't need deep frontend expertise for this role, but you do need to be genuinely comfortable there.\nWe're specifically looking for someone with a payments or fintech background. Think a payment gateway, PSP, neobank, or cross-border payments company (Razorpay, Juspay, Cashfree, PhonePe, Nium, or similar).\nKey Responsibilities\nOwn the backend of critical payment flows - initiation, partner routing, lifecycle state (statuses, webhooks, returns, recalls), and settlement tracking - across API and GUI surfaces.\nBuild and extend partner integrations for new corridors: adapters for banking and payment partners, cut-off and calendar handling, and reconciliation hooks from day one.\nDesign for correctness under failure - idempotency, safe retries against external partners, exactly-once effects on money state, and graceful degradation when a partner is down.\nContribute to the engineering of regulated controls: safeguarding flows and transaction monitoring pipelines, with audit trails built in rather than bolted on.\nBuild the client-facing surfaces your backend powers - payment tracking, status views, and reporting in the dashboard - and ship features end-to-end rather than stopping at the boundary.\nInstrument the money path - payment success rates, stuck-payment detection, partner latency and error rates - so problems are visible before clients or partners report them.\nPartner closely with Product to shape flows, and with senior engineers to shape API contracts and corridor architecture.\nDrive work to closure with Product, Operations, and Compliance. You are accountable for adoption, not just delivery.\nAct as a product engineer - scope a problem statement, understand its product impact, and take the hard prioritisation calls.\nRaise the bar through code review and design feedback, and mentor L1/L2 engineers on the team.\nBuild a healthy engineering-excellence and tech-debt backlog - surface the right items, work with the EM on a resolution plan, and drive them to closure.\nParticipate in on-call, respond to incidents with urgency - on the money path, urgency is literal - and turn post-mortems into durable fixes.\nWhat we are looking for\nMust-haves:\n5-7 years of experience building production backend systems, with the majority of that depth on server-side and distributed systems work.\n A payments or fintech background - you've worked at a payments company, gateway, PSP, or bank-facing fintech and have built systems on a live payment or money path (e.g. Razorpay, Juspay, Cashfree, PhonePe, Nium, or similar).\nDeep expertise in TypeScript and Node.js, and strong command of designing and operating REST APIs on non-trivial systems.\nStrong data modelling and query skills on PostgreSQL - schemas for money state, transactional integrity, and queries that stay correct and fast as volume grows.\nSound instincts for correctness under failure - idempotency, retries against external systems, partial failures, ordering, and duplicate handling. You've been burned by at least one of these and design differently because of it.\nHands-on experience integrating external partner APIs - auth schemes, certificates, webhooks, sandbox-vs-production drift, and partners whose failure modes are undocumented.\nExperience with asynchronous processing - queues, jobs, or workflow engines - for long-running, multi-step flows.\nExperience writing automated tests for backend systems, including integration tests against flaky external dependencies.\nWorking frontend proficiency: building React views on your own APIs, comfort in a Next.js (or similar) codebase. You should be able to own the GUI surface of your own feature.\nSolid command of object-oriented programming principles and low-level design patterns.\nComfort with abstract, ambiguous problems - you can turn a vague mandate into scoped, sequenced deliverables without waiting for someone to specify it for you.\nHands-on and high agency. You find the important problem and go solve it rather than waiting to be assigned it.\nHeavy AI user. You use AI coding tools with real technique and get materially more done because of it.\nData-driven, and a clear written communicator - we are async-heavy and globally distributed.\nWhat helps you stand out:\nExperience with cross-border payments, FX, or multi-currency systems - corridors, SWIFT/SEPA or local clearing schemes.\nExperience building or operating against a double-entry ledger, or reconciliation systems at scale.\nExperience with regulated controls - safeguarding, transaction monitoring, sanctions screening, or audit-grade logging.\nExperience with durable workflow or orchestration engines (Temporal or similar) on money flows.\nExperience with observability tooling (OpenTelemetry or similar) on high-stakes flows.\nExperience with stablecoin or digital-asset rails alongside fiat.\nWhat Success Looks Like\nThe payment flows you own always reflect accurate money state - including during retries, partial failures, partner outages, and cut-off edge cases.\nNew corridor integrations you build ship on time and don't destabilize existing ones - and each one is easier than the last because of the patterns you've laid down.\nStuck payments are detected and recovered by the system you've instrumented, not discovered by clients or in month-end reconciliation.\nYou ship complex features end-to-end from technical design to execution, delivery and adoption - including the GUI surface they need.\nProduct and Operations rely on your judgment for decisions on the money path.\nL1/L2 engineers around you grow measurably faster.\nYou raise the bar for backend engineering in the Payments team.\nWhat We Offer\nCompetitive salary and benefits package.\nEquity in a rapidly growing company.\nOpportunity to work in a fast-paced startup at the forefront of fintech innovation.\nOpportunity to make a significant impact on global financial infrastructure.\nCollaborative work culture with emphasis on personal and professional growth.\nWe are committed to building a diverse and inclusive workplace. 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