Senior Back-end Developer - Kotlin

Link Group • Java • Kotlin • 3 days ago
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Link Group

Link Group is a Polish technology services company founded in Warsaw in 2016 that builds and supplies engineering teams to clients across Europe. Its model combines body leasing and managed teams with delivery of complete software, cloud and cybersecurity projects, drawing on a large bench of contractors rather than a fixed permanent staff. The company works heavily in financial services, telecommunications and public sector projects, and has built a specialisation in blockchain and distributed ledger engineering alongside more conventional cloud and application development work.
linkgroup.co • HQ: Warsaw, Poland • Recruiting & Staffing • Professional Services • Financial Services • Blockchain & Crypto • Custom Software Development • Cloud Computing • Software • IT Outsourcing • Cybersecurity • Information Technology • 1001-5000 employees • Est. 2016

We are looking for a Senior Back-end Developer with strong experience in Kotlin and Java-based backend development, working with modern reactive technologies.

Requirements

  • Minimum 6 years of professional experience in backend software development
  • Strong hands-on experience with:
    • Kotlin
    • Java 17+
    • Vert.x
    • Spring Boot / Spring WebFlux
    • Hibernate
  • Solid understanding of backend application development and modern software engineering practices
  • Experience developing and maintaining scalable backend services
  • Good understanding of reactive programming and non-blocking application development
  • Ability to troubleshoot and resolve complex technical issues
  • Ability to work independently and contribute effectively within a development team
  • Good communication and collaboration skills

Nice to have

  • Experience with microservices architecture
  • Experience working with REST APIs
  • Experience with cloud-based environments
  • Knowledge of CI/CD and Agile development practices
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