Senior Backend Developer

About This Gig

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 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 wi

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