Senior Backend Developer

Job description

We’re hiring a hands-on Backend Developer to build and ship production serverless services for a fintech platform. Tech stack Languages: TypeScript, Node.js (18–22) AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step Functions Databases: DynamoDB, PostgreSQL Frameworks / middleware: Serverless Framework, Middy Libraries: Zod (schemas/validation), Winston (logging), AWS X-Ray (tracing), Luxon (dates) Testing: Mocha, Sinon Tooling: ESLint, Prettier, Terraform, GitHub Actions Your role at 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 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? 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 is the place for you.