Location: 100% Remote · Type of Cooperation: External Contractor (B2B / 3rd party)

We are looking for an experienced Senior Java Developer with a strong background in distributed systems, microservices, and IoT, who will join our international team to work on the development of an OTA (Over-the-Air) service for firmware/software updates.

What You’ll Do:

• Design and develop microservices using Java 21+ and the Spring ecosystem
• Implement OTA update and secure provisioning workflows for IoT devices
• Work with event-driven architecture using Apache Kafka
• Design and optimize databases (primarily PostgreSQL)
• Collaborate with architects, DevOps, and security teams
• Refactor and evolve existing solutions
• Actively participate in code reviews, testing, and CI/CD processes