Senior Java Backend Engineer
Posted
Summary
Senior Java Backend Engineer at Sinch building scalable distributed systems for the Contacts Platform using Java, Spring, Kafka, MongoDB, and OpenSearch. 95% remote role based in Spain with quarterly office visits in Madrid.
- As a Senior Software Engineer, you will play a key role in designing and building the next generation of our Contacts Platform. You will work in a dynamic, collaborative environment to develop scalable distributed systems. Your contributions will directly impact the efficiency, performance, and safety of conversations at scale
- Design, develop, and maintain backend services for Contacts Platform, while contributing to our frontend applications
- Build high-performance, scalable, and distributed systems
- Work with Java, Spring, Kafka, MongoDB, OpenSearch to enhance our product, ensuring safety, efficiency, and responsiveness
- Develop internal tools for monitoring, debugging, and optimizing applications at scale
- Ensure observability, reliability, and fault tolerance across all services
- Collaborate with cross-functional teams including Software Engineers, UX Designers and Product Managers
- Maintain a strong focus on code quality, security, and best practices in software development
- This is a 95% remote role. You must be based in Spain and we will bring you to the office in Madrid for some days every quarter
- Deep understanding of distributed systems and experience building high-scale microservices and event-driven architectures
- Production-level experience in backend development using Java
- Familiarity with cloud platforms (AWS, GCP, or Azure) and containerized deployments (Docker, Kubernetes)
- A problem-solving mindset with the ability to debug complex distributed systems
- Strong communication skills and the ability to work effectively in a collaborative environment
- Strong background in database design and optimization, particularly with MongoDB, Cassandra, or other distributed databases
- Experience with observability, logging, and monitoring tools for debugging and performance analysis
- Experience with modern Frontend frameworks like React
- Experience with MongoDB and OpenSearch
- Knowledge of message brokers like Kafka and RabbitMQ