Backend Software Engineer - Payments platform

We are seeking a hands-on backend engineer to add new capabilities to the Payments platform, applying deep backend engineering skills to high-stakes, distributed financial systems. The engineer will develop and maintain production Java/Spring Boot services, contributing to feature development, bug fixes, and reliability improvements across the platform.

Requirements

• 5+ years of backend engineering with Java and Spring Boot (Boot 3 preferred) in production microservices.
• Mid-to-senior level, with demonstrated ownership of production services in a distributed systems environment.
• Experience with GraphQL - either building APIs with Netflix DGS or consuming them via the Apollo Java/Kotlin client (Apollo GraphQL client experience required).
• Hands-on experience with AWS SQS, Apache Kafka, or RabbitMQ in event-driven, distributed systems.
• Strong JPA/Hibernate experience with MySQL/Aurora (Spring Data JPA), including transactional design and optimistic locking.
• 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 pipelines and Datadog (metrics and monitors).
• Comfortable using AI coding assistants (e.g., GitHub Copilot, Claude) responsibly to accelerate development while maintaining code quality and correctness.
• Experience with financial-grade backend systems where correctness, idempotency, and consistency are non-negotiable.
• Ability to reason clearly about transactional boundaries across external systems (e.g., a third-party billing platform plus a local metadata store).
• Have built or maintained a production Spring Boot service that consumes events from SQS, Kafka, or RabbitMQ.
• Have designed idempotent event handlers for workflows.
• Have written JPA entities and managed schema migrations against a production MySQL/Aurora database.
• Have integrated with an external REST- or SDK-based third-party platform.
• Have set up or worked with Datadog monitors as deploy quality gates in a CI/CD pipeline.

Will be a plus

• Prior experience in the Billing or Payments domain.
• Experience with DynamoDB (AWS SDK v2) and/or MongoDB (Spring Data) in a multi-store architecture.
• Experience with Netflix DGS.

Responsibilities

• Develop and maintain backend Java/Spring Boot services across the Payments platform.
• Add new payment methods to the platform's existing capabilities.
• Contribute to feature development, bug fixes, and reliability improvements across these services.
• Deliver production-ready feature work and bug fixes through GitLab CI, with unit and integration test coverage that meets Jacoco gates.
• Strengthen system reliability through improved observability, resilience patterns, and safe canary and production deploys gated by Datadog monitors.