Senior Backend Developer (Java / Spring Boot)

About the Project

You'll join our client's team working on a live, production B2B SaaS platform in the sales/revenue operations space — including pipeline management, sales process configuration, risk alerting, and role-based analytics.

The client's product is fully launched and actively used in production. It runs on AWS, uses enterprise SSO (OAuth2/OIDC), and integrates with an external data platform.

This is not a greenfield project — you'll be working with an established codebase and existing engineering practices, including automated testing, pre-commit hooks, and CI enforcement. Your focus will be on extending backend functionality, improving architecture, and further strengthening the platform.

Responsibilities

• Build, maintain, and extend backend functionality using Java and Spring Boot
• Design and develop REST APIs and backend integrations
• Work within and help enforce a hexagonal / DDD-oriented architecture, keeping domain logic decoupled from framework and persistence concerns
• Raise automated test coverage across domain and application layers and maintain a strong testing culture
• Help introduce architecture-conformance checks, such as ArchUnit, to enforce dependency boundaries
• Contribute to migrating backend dependencies from early-access or milestone releases to stable GA versions as part of ongoing platform hardening
• Maintain and extend OAuth2/OIDC-based authentication and role-based access control
• Work with PostgreSQL, database schema evolution, and Flyway migrations
• Maintain integrations with external data platforms, including Databricks
• Strengthen secrets and credentials management across the codebase and CI/CD

• Participate in code reviews, technical design discussions, troubleshooting, and production incident response

   

Requirements

• 5+ years of professional backend development experience
• Strong production experience with Java and Spring Boot
• Strong understanding of REST API design and backend architecture
• Hands-on experience with Spring Security and OAuth2/OIDC flows
• Strong PostgreSQL experience and knowledge of schema migration tooling such as Flyway
• Experience with AWS
• Strong testing discipline with JUnit 5 and Testcontainers
• Experience with Docker and container-based deployment, ideally AWS ECS/Fargate or equivalent
• Comfortable working with or refactoring toward hexagonal, clean, or DDD-oriented architecture
• Understanding of CI/CD and production engineering practices
• English — Upper-Intermediate or higher

Nice to Have

• Experience with AWS Secrets Manager and cloud secrets management
• Experience integrating with data platforms such as Databricks
• Experience with ArchUnit or similar architecture-enforcement tooling
• Experience modernizing or hardening mature production codebases
• Experience migrating framework or library dependencies from early-access versions to stable GA releases
• Experience with monitoring and observability tools such as Datadog