Senior Backend Developer

We're hiring a hands-on Backend Developer to build and ship production serverless services for a fintech platform. This role is about clean execution: designing APIs, owning integrations, and delivering reliable AWS Lambda microservices with strong observability and test discipline. AI tools are part of the daily workflow.Tech stackLanguages: TypeScript, Node.js (18–22)AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step FunctionsDatabases: DynamoDB, PostgreSQL Frameworks / middleware: Serverless Framework, MiddyLibraries: Zod (schemas/validation), Winston (logging), AWS X-Ray (tracing), Luxon (dates)Testing: Mocha, SinonTooling: ESLint, Prettier, Terraform, GitHub Actions your role at xpate (https://himalayas.app/companies/xpate): Build and evolve Lambda-first microservices that handle real money flows and integrations.Design REST APIs with type-safe schemas (Zod) and contracts that don't rot.Model data in DynamoDB (access patterns first) and use PostgreSQL when relational fits better.Ship event-driven workflows with SQS/EventBridge/Step Functions: retries, idempotency, dead-letters, backpressure.Ensure observability: structured logging (Winston), distributed tracing (AWS X-Ray), actionable metrics.Write tests that protect releases (Mocha/Sinon), keep quality bars high, and reduce regressions. we're ready to meet you, if... You have strong hands-on backend engineering experience in TypeScript / Node.js.You have real AWS production experience — not "used Lambda once", but built, operated, debugged, and fixed systems in production.You have the ability to ship fast without trashing quality: clean code, predictable delivery, and solid engineering fundamentals.You use AI tools daily to accelerate output (coding, debugging, analysis) and improve outcomes.You have English at B2+ level (the team is English-speaking). what working at xpate (https://himalayas.app/companies/xpate) looks like: A competitive salary (depending on what you bring).Everything you need to succeed, with flexibility built in — from flexible hours and hybrid/remote work options to private health insurance and paid time off.Top-of-the-line Apple gear to fuel your work.A workspace designed for focus and collaboration.Ownership of your work end-to-end, with the freedom to move fast and make a real impact.Celebrated wins, opportunities to grow and a culture where voices are heard and chances to grow are ever-present. why join xpate (https://himalayas.app/companies/xpate)? We're building the financial backbone of the future, where payments move freely and businesses thrive without barriers. If you want real impact, freedom to innovate, and work that drives change - xpate (https://himalayas.app/companies/xpate) is the place for you. Originally posted on Himalayas (https://himalayas.app)