Backend Engineer

About the role A Singapore-based mobile virtual network operator offering travel eSIM plans through its app and website. You will write and run the backend services that turn a paid order into a working eSIM. You will also configure data packages on upstream platforms and help Operations verify what travellers can buy and use.

Design and maintain REST APIs and database schemas for orders, eSIM provisioning, activation, usage and top-ups. Write documented, testable code that Product, Frontend and Operations can build on. Integrate each provider from sandbox to production.

Map provider package IDs to retail SKUs, process webhooks or poll for status, and make retries safe. If a provider times out after creating an eSIM, reconcile the order before sending another request. Create and test packages in provider portals.

Configure coverage, networks, data allowances and validity. Document when validity starts, when daily data resets, how fair-use throttling works and whether top-ups extend the plan. Work with Product, Frontend, Payments and Operations to test an order from payment confirmation to first data use.

Check that the package a customer receives matches the offer on the website and in the app. Deploy and monitor backend services, write automated integration tests and investigate slow or failed requests. Give Operations tools to trace orders, explain provider-specific issues and confirm recovery with a test order.

Hands-on backend development i