{"id":1168752,"url":"https://alion.io/job/transak-software-development-engineeriii-backend-fiat-payments","title":"Software Development Engineer,III (Backend) — Fiat Payments","company":{"id":47554,"name":"Transak","domain":"transak.com","url":"https://alion.io/company/transak","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Breezy","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"middle","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["AR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon CloudWatch","optional":false},{"name":"Amazon ECS","optional":false},{"name":"Amazon EKS","optional":false},{"name":"Amazon S3","optional":false},{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"CI/CD","optional":false},{"name":"CloudFormation","optional":false},{"name":"gRPC","optional":false},{"name":"IAM","optional":false},{"name":"Jenkins","optional":false},{"name":"New Relic","optional":false},{"name":"Node JS","optional":false},{"name":"PCI DSS","optional":false},{"name":"Pipeline as Code","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true},{"name":"Kubernetes","optional":true},{"name":"MetaMask","optional":true},{"name":"Trust Wallet","optional":true}],"status":"live","first_seen_at":"2026-09-24T05:26:41Z","employer_posted_date":"2026-09-24","last_verified_at":"2026-10-15T15:34:30Z","board_verified":true,"closed_at":null,"days_open":21,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":21},"description":"About the company\nOur mission is that \"Any financial application can onboard any user, anywhere in the world, in 1 click.\"\nTransak provides onboarding to financial applications through authentication, KYC, risk checks, and fiat on/off ramps. This is a next generation of infrastructure for the next generation of financial applications that are built on blockchain and stablecoin rails. Our API and widget-based solutions are used by top partners like MetaMask, Coinbase, Ledger, and Trust Wallet to enable seamless onboarding of over 10 million users across over 450 active applications.\nWe have raised over $37M from top-tier investors including Consensys, Tether, and Animoca Brands.\nAbout the role\nTransak's Fiat/Payments team builds and operates the rails that move money between traditional banking systems and crypto - ACH, SEPA, Faster Payments, wires, virtual accounts, and card rails. As an SDE 3, you will own critical, high-throughput payment microservices end-to-end: design, build, scale, and operate systems that move real money for users across multiple currencies and jurisdictions, with US,UK/EU regulatory and global banking-partner requirements as a core part of the job.\nThis is a senior individual-contributor role calibrated against SDE 3 / Senior Engineer, driving architecture decisions, mentoring engineers, and being the go-to owner for a payments domain, while staying hands-on in code daily.\nKey Responsibilities\n Payment Systems Ownership & ArchitectureOwn payment microservices end-to-end - design, build, deploy, and operate Node.js services (orders, payment, reconciliation, virtual accounts, payout orchestration) handling real-time financial transactions at scale.\nDesign for correctness and failure: idempotent, retry-safe, reconciliable systems where every transaction is traceable, auditable, and recoverable (partial failures, webhook replays, duplicate detection, distributed state machines).\nArchitect for scale and resilience across a distributed microservices architecture; make service-boundary and build-vs-buy decisions; address root causes rather than symptoms.\n\n Banking & Partner IntegrationsDrive integrations with banking and payment partners (e.g. banking and card providers / risk providers) - API contracts, webhook handling, sandbox-to-production rollout, and reconciliation logic across multiple rails (ACH, SEPA, Faster Payments, wires).\nWork with Risk, Compliance on KYC, AML, and fraud-control touchpoints in the payment flow.\n\n Local Payments experience in Argentina and LATAMHands-on experience integrating with Argentine banking infrastructure CBU/CVU-based transfers, COELSA/BCRA clearing systems, and real-time credit transfer protocols (Transferencias 3.0).\nExperience working with Argentine PSPs or fintechs operating CVU accounts including webhook reconciliation, fund identification by CUIT, and split CBU structures for inflow/outflow segregation.\nFamiliarity with BCRA/CNV/ UIF regulatory constraints affecting payment flows including restrictions on card-based crypto purchases and reporting obligations tied to transaction thresholds.\nExperience building reconciliation systems for ARS-denominated transactions, including handling multi-FX environments, intraday rate volatility, and settlement timing differences between CBU and CVU rails.\nUnderstanding of CUIT/CUIL-based fund identification for compliance and reconciliation purposes.\nPIX and SPEI experience is\n\n Infrastructure, CI/CD & OperationsBuild and maintain CI/CD pipelines (Jenkins) - automated testing, blue/green or canary deployments, and rollback strategies for services that cannot tolerate downtime or data loss.\nOperate infrastructure on AWS (ECS/EKS, Lambda, SQS/SNS, RDS, CloudWatch); contribute to infra-as-code, monitoring, alerting, and on-call runbooks for payment-critical systems.\nOptimize the data layer: schema design and query performance in MongoDB, caching and rate-limiting strategies with Redis, and safe migration patterns for high-volume transactional collections.\nParticipate in on-call for payment-critical services, including incident response and postmortems.\n\nTechnical Leadership & CollaborationLead technical roadmaps - break down large, ambiguous payments initiatives into shippable milestones; write design docs/RFCs; drive consensus across Engineering, Product, Risk, and Operations.\nMentor and raise the bar - review code and designs, coach mid-level engineers, and help hire and grow the team.\nUphold security and compliance best practices for handling PII/financial data in a regulated, PCI-DSS-adjacent environment.\n\nWhat We're Looking For\n6+ years of professional software engineering experience, with a significant portion building backend/distributed systems; prior experience in fintech, payments, on-and-offramp provider, or banking infrastructure strongly preferred.\nExperience with payment rails or card processing.\nFamiliarity with banking partner integrations in LATAM.\nStrong hands-on expertise in Node.js (TypeScript preferred) for performant, production-grade backend services.\nDeep experience with MongoDB - schema design, aggregation pipelines, indexing strategy, and performance tuning at scale.\nProficiency with Redis - caching, distributed locks, rate limiting, and pub/sub patterns.\nProven experience designing and operating microservices architectures, including inter-service communication (REST/gRPC/event-driven via SQS/Kafka,ELK,New relic, Mixpanel), service discovery, and API contract design.\nSolid understanding of CI/CD pipelines, with hands-on experience using Jenkins (pipeline-as-code, multi-stage builds, automated test gates).\nWorking knowledge of AWS infrastructure - ECS/EKS/Lambda, VPC networking basics, IAM, S3, RDS, CloudWatch; infra-as-code (Terraform/CloudFormation) is a plus.\nStrong grasp of distributed systems fundamentals: idempotency, eventual consistency, retries/backoff, circuit breaking, and failure isolation.\nTrack record of owning a service or domain end-to-end in production, including on-call responsibility.\nExcellent written communication - comfortable authoring design docs/RFCs and explaining trade-offs to engineers and non-technical stakeholders (Risk, Ops, external partners).\nNice-To-Haves\nExperience with payment rails in LATAM (Pix, Spei and SWIFT/wires) or card processing.\nExposure to KYC/AML/fraud tooling.\nPrior experience operating in a regulated environment.","description_format":"text","description_chars":6402,"description_truncated":false,"requirements":{"experience_years_min":6,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Argentina","iso":"AR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto","Crypto Payments","Crypto Wallets"],"lifecycle":[{"event":"open","at":"2026-09-24T05:51:05Z"}],"visa":[],"liveness":{"score":75,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.838,"p_room":0.9,"age_days":21,"expected_fill_days":44,"reasons":["conf:4","win:mid"],"computed_at":"2026-10-15T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/transak-software-development-engineeriii-backend-fiat-payments","json_url":"https://alion.io/job/transak-software-development-engineeriii-backend-fiat-payments.json","meta":{"generated_at":"2026-10-15T19:49:08Z","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":30121,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-16T00:00:00Z"}},"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":47554},"rest":"https://alion.io/mcp/rest/get_company?id=47554"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftransak-software-development-engineeriii-backend-fiat-payments"},{"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%2Ftransak-software-development-engineeriii-backend-fiat-payments"},{"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%2Ftransak-software-development-engineeriii-backend-fiat-payments"},{"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/transak-software-development-engineeriii-backend-fiat-payments\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftransak-software-development-engineeriii-backend-fiat-payments"}]}