Senior Contractor – IoT OTA & Secure Provisioning

Grafton Recruitment byl založen v roce 1982 a patří k předním dodavatelům personálního poradenství. Je jednou z největších nezávislých evropských firem, která vyhledává zaměstnance napříč všemi sektory a pracovními pozicemi. V ČR nás můžete navštívit na 14 pobočkách. Více na www.grafton.cz

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

NABÍZÍME

• 5 weeks of vacation
• 2 sick days
• Flexi passes
• Meal allowance

POŽADUJEME

• Minimum 5 years of experience in backend development with Java + Spring
• Experience with microservice architecture and distributed systems
• Hands-on experience with event-driven systems and Apache Kafka
• Strong knowledge of PostgreSQL
• Solid understanding of IT security concepts (PKI, etc.)
• Genuine interest in IoT technologies
• Fluent English and the ability to work effectively in an agile remote team

Nice to Have (not required)

• Experience with OTA / secure provisioning
• Knowledge of Python or Golang
• Experience with real-time systems

DALŠÍ POŽADAVKY

• angličtina (B2 - pokročilý)

Send us your CV in English and Czech if you have one. For more related job opportunities visit https://www.grafton.cz/en/job-search