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 stack

• AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step Functions

• Frameworks / middleware: Serverless Framework, Middy
• Libraries: Zod (schemas/validation), Winston (logging), AWS X-Ray (tracing), Luxon (dates)

• 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.
• 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.