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SH

Senior Software Engineer

SH

Senior Software Engineer at Sinch developing scalable distributed systems for their Contacts Platform. Collaborating in a remote role with occasional office visits in Madrid.

Posted 5/8/2026full-timeMadrid • 🇪🇸 SpainSeniorWebsite

Tech Stack

Tools & technologies
AWSAzureCassandraCloudDistributed SystemsDockerGoogle Cloud PlatformJavaKafkaKubernetesMicroservicesMongoDBSpring

About the role

Key responsibilities & impact
  • 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.

Requirements

What you’ll need
  • Production-level experience in backend development using Java.
  • Deep understanding of distributed systems and experience building high-scale microservices and event-driven architectures.
  • 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.
  • 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.

Benefits

Comp & perks
  • 95% remote role with office visits quarterly in Madrid

ATS Keywords

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Hard Skills & Tools
JavaSpringKafkaMongoDBCassandradistributed systemsmicroservicesevent-driven architecturesdatabase designobservability
Soft Skills
problem-solvingcommunicationcollaboration