#109 - Backend Software Engineer - Payments Platform

Key Responsibilities

• Develop and maintain production Java and Spring Boot services for a payments platform.
• Add new payment methods and deliver features, bug fixes, and reliability improvements.
• Deliver production-ready changes through GitLab CI, with unit and integration test coverage that meets JaCoCo quality gates.
• Improve observability and resilience, and support safe canary and production deployments gated by Datadog monitors.

Must-Have Skills

• 5+ years of backend engineering experience with Java and Spring Boot in production microservices.
• Mid-to-senior-level experience with demonstrated ownership of production services in a distributed systems environment.
• Experience building GraphQL APIs with Netflix DGS or consuming APIs through the Apollo Java/Kotlin client. Apollo GraphQL client experience is required.
• Hands-on experience with AWS SQS, Apache Kafka, or RabbitMQ in event-driven distributed systems, including building or maintaining a production Spring Boot service that consumes events.
• Strong JPA/Hibernate and Spring Data JPA experience with MySQL/Aurora, including:
  • Transactional design
  • Optimistic locking
  • Writing JPA entities
  • Managing production schema migrations
• Experience writing JUnit 5 unit tests with Mockito and integration tests against live environments.
• Proficiency with Gradle multi-module builds.
• Experience with GitLab CI/CD and Datadog metrics and monitors, including using Datadog monitors as deployment quality gates.
• Responsible use of AI coding assistants, such as GitHub Copilot or Claude, while maintaining code quality and correctness.
• Experience with financial-grade backend systems requiring correctness, idempotency, and consistency.
• Ability to reason clearly about transactional boundaries across external systems, such as a third-party billing platform and a local metadata store.
• Experience designing idempotent event handlers.
• Experience integrating external REST- or SDK-based third-party platforms.

Nice-to-Have Skills

• Spring Boot 3 experience.
• Prior billing or payments domain experience.
• DynamoDB with AWS SDK v2 and/or MongoDB with Spring Data in a multi-store architecture.
• Netflix DGS experience.

Required Tools & Platforms

• Java and Spring Boot
• GraphQL and the Apollo Java/Kotlin client
• AWS SQS, Apache Kafka, or RabbitMQ
• JPA/Hibernate, Spring Data JPA, and MySQL/Aurora
• JUnit 5 and Mockito
• Gradle
• GitLab CI/CD
• JaCoCo
• Datadog
• AI coding assistants used responsibly, such as GitHub Copilot or Claude

Location, Time & Engagement

• Candidates must be based in an eligible APAC location.
• Working-hour coverage aligned with India Standard Time (IST) is required.