Senior Backend Developer

• Build and evolve Lambda-first microservices handling real money flows and integrations
• Design REST APIs with type-safe Zod schemas and durable contracts
• Model data in DynamoDB using access-pattern-first design
• Use PostgreSQL when relational storage is more appropriate
• Ship event-driven workflows with SQS, EventBridge, and Step Functions
• Implement retries, idempotency, dead-letter handling, and backpressure
• Ensure observability through structured Winston logging, AWS X-Ray distributed tracing, and actionable metrics
• Write tests with Mocha and Sinon to protect releases and reduce regressions
• Maintain high quality standards while delivering predictably
• Own work end-to-end and contribute to xpate’s fintech platform

• Strong hands-on backend engineering experience in TypeScript / Node.js
• Real AWS production experience building, operating, debugging, and fixing systems in production
• Ability to ship fast without compromising quality
• Clean code, predictable delivery, and solid engineering fundamentals
• Use AI tools daily for coding, debugging, and analysis
• English at B2+ level
• Experience with TypeScript and Node.js 18–22
• Experience with AWS Lambda, DynamoDB, S3, SQS, EventBridge, and Step Functions
• Experience with PostgreSQL
• Experience with Serverless Framework and Middy
• Experience with Zod, Winston, AWS X-Ray, and Luxon
• Experience with Mocha and Sinon
• Experience with ESLint, Prettier, Terraform, and GitHub Actions

• Flexible hours
• Hybrid/remote work options
• Private health insurance
• Paid time off
• Top-of-the-line Apple gear
• Workspace designed for focus and collaboration
• Ownership of work end-to-end
• Freedom to move fast and make a real impact
• Celebrated wins
• Opportunities to grow
• Culture where voices are heard and chances to grow are ever-present