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

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaSpring BootRESTful service designSQLMongoDBMySQLKafkaDockerAgilecode reviews

Soft Skills

collaborationcommunicationeager to learnknowledge sharinggrowth mindsetstrong written Englishstrong spoken English