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ComeOn Group

Java Developer – Mid Level

ComeOn Group

Java Developer at ComeOn Group designing and developing backend services in a hybrid workplace. Collaborating within a cross-functional team using modern technologies like Java and Spring Boot.

Posted 6/24/2026full-timeKatowice • 🇵🇱 PolandMid-LevelSeniorWebsite

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Hard Skills
JavaSpring BootRESTful service designSQLMongoDBMySQLKafkaDockerAgilecode reviews
Soft Skills
collaborationcommunicationeager to learnknowledge sharinggrowth mindsetstrong written Englishstrong spoken English
Industry Keywords
backend servicescross-functional teamdevelopment lifecyclemodernizationlarge-scale codebaseengineering standards

Tech Stack

Tools & technologies
DockerJavaKafkaMongoDBMySQLNoSQLSpringSpring BootSpringBootSQL

About the role

Key responsibilities & impact
  • Design, develop, and maintain backend services and integrations as part of a cross-functional team
  • Work across a modern, broad technology stack: Java, Spring Boot, Kafka, Docker, MongoDB, MySQL
  • Collaborate with developers, QA engineers, and Product Owners throughout the full development lifecycle
  • Contribute to gradual modernization of an established, large-scale codebase through safe, well-scoped changes
  • Participate in code reviews and help uphold engineering standards within the team

Requirements

What you’ll need
  • 3–5 years of professional Java development experience
  • Solid understanding of Spring Boot and RESTful service design
  • Good knowledge of SQL and relational databases; exposure to NoSQL (MongoDB) is a plus
  • Comfortable working in an Agile team environment with daily collaboration across functions
  • Eager to learn, communicative, sharing knowledge, and grow as an engineer
  • Strong written and spoken English

Benefits

Comp & perks
  • A competitive remuneration package inc. a company bonus scheme! 💰
  • Fantastic quarterly team events and weekly company events 😎
  • A one-time bonus to help you set up a comfortable workstation at home (we’re truly Hybrid!)
  • On top of our Hybrid work arrangement, up to 40 days a year to work fully remote from anywhere 🌎
  • Quarterly team events and regular company events
  • A friendly, international, curiosity-driven culture