Java Developer

We’re looking for a Java Developer to join our Kyiv-based team. You’ll contribute to the development of the ThingsBoard IoT platform, used for monitoring various environmental metrics. You’ll receive mentorship from senior engineers and collaborate directly with our US-based client.

Work format: hybrid, from the office in Kyiv.

Responsibilities

• Design and maintain scalable RESTful APIs with Java & Spring Boot
• Integrate new devices and data protocols into the platform
• Participate in technical discussions, feature planning, and architecture reviews
• Ensure code quality through integration testing and peer code reviews
• Contribute to and maintain Swagger API documentation
• Debug and troubleshoot issues in local and staging environments
• Deliver backend features end-to-end, from design to deployment
• Communicate directly with the client and cross-functional team members

Requirements

• 1+ year of hands-on Java development experience
• Strong understanding of OOP, SOLID principles, and clean architecture
• Proficiency in Java, Spring Boot, and REST APIs
• Confident SQL skills, especially PostgreSQL
• Solid knowledge and practical experience in multithreading (threads, executors, futures, synchronization)
• Comfortable working in Linux-based environments
• English B2+ for daily client communication
• Responsible, self-driven, and able to work independently

Nice to Have

• Experience with Docker (development & deployments)
• Understanding of Kafka and event-driven systems
• Familiarity with MQTT or other IoT-related protocols
• Experience with AWS (EC2, RDS, ElastiCache)
• Exposure to frontend or DevOps workflows

What We Offer

• Flexible working hours
• Medical insurance
• Structured onboarding and clear growth plan
• Senior mentorship and knowledge-sharing culture
• Autonomy and ownership of feature development
• A meaningful international product in the fast-growing IoT domain