Backend Engineer

Role Overview Keystone AI is seeking a Java Software Engineer to join our Engineering team. You will be actively contributing to the development and optimization of our high-performance Spring Boot backend, ensuring scalability, reliability, and security. Your responsibilities Develop, maintain, and optimize scalable Spring Boot application Implement clean, modular, and testable Java code Contribute to design and implement features following relational (MySQL) and NoSQL (MongoDB) databases Implement and follow best practices in software architecture, leveraging Layered Architecture, DDD, or Event-Driven design Troubleshoot and optimize backend performance and security Work with DevOps teams to improve CI/CD automation and deployment processes Requirements Experience in Java & Spring Boot (microservices, REST APIs) Proficiency with SQL & NoSQL databases Experience with software architecture patterns (Layered Architecture, DDD, Event-Driven Design) Experience with TDD and testing best practices in Spring Boot (JUnit, Mockito, Testcontainers) Experience with messaging systems (ActiveMQ, Kafka) Good knowledge of English (both written and spoken) Excellent communication skills, with the ability to explain complex problems and solutions to different stakeholders. Bonus Points Experience with modern API communication (GRPC, GraphQL, REST) Hands-on experience with CI/CD tools (GitLab Pipelines, GitHub Actions, Jenkins) Experience with AWS, especially EC2, S3 Hands-on experience with Docker & Kubernetes for containerized application deployment and management Security best practices for backend applications (knowledge of ISO 27001:2022 Annex A 8.28 is a plus) Originally posted on Himalayas