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T Hub - Java Developer
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Offer summary

(Summary generated by AI based on the full job description)

The project involves developing cloud-based microservices using Java 21, Spring Boot, Kotlin, Go along with AWS, Kubernetes, Docker. Responsibilities include building scalable cloud-native solutions, maintaining high-quality code, implementing unit tests, and contributing to team development. Work with REST APIs, Hibernate/JPA, PostgreSQL and CI/CD pipelines is required. Experience in DevOps and international projects is a plus.

new

T Hub - Java Developer

Company: T-Mobile

from: 3 June 2026
to: 3 July 2026
salary not specifiedcontract of employment (full-time)
Offer parameters
level:mid
working mode:hybrid
Warszawa, Mokotów
Warszawa, MokotówMarynarska 12View on map

Requirements

Expected technologies

Java

Operating system

Windows

Our requirements

  • at least 3 years of experience as a Java Developer,
  • strong knowledge of Java 21, Spring Boot, microservices architecture,
  • experience with REST APIs, Hibernate/JPA and SQL,
  • experience with CI/CD pipelines,
  • knowledge of JUnit / unit testing practices,
  • understanding of design patterns,
  • solution-oriented mindset and strong communication skills,
  • English at minimum B2 level

Optional

  • experience in DevOps area,
  • experience with cloud technologies (AWS, Azure or Google Cloud),
  • experience in international projects,
  • degree in Computer Science, Mathematics or Engineering.

Your responsibilities

  • develop and maintain cloud-based microservices built with modern frameworks,
  • design and implement scalable, cloud-native solutions,
  • support team development and contribute to knowledge sharing,
  • select effective technologies for building high-performance systems,
  • write clean, maintainable, and high-quality code,
  • implement unit tests and ensure code quality,
  • collaborate with cross-functional teams in an international environment.

Technology stack:

  • Java 21,
  • Spring Boot, Kotlin, Go,
  • AWS,
  • Kubernetes, Docker,
  • PostgreSQL,
  • Maven,
  • Git (GitLab),
  • Sonar.

How we work:

  • Scrum with SAFe framework,
  • tools: Jira, Confluence,
  • collaboration within 25 international Scrum teams supported by UI/UX, DevOps and System Teams,
  • flexible work model: remote or office (free parking or bike space),
  • work as part of one of our Polish Scrum teams (5 teams already in place),
  • team setup: Solution Designer, Business Analyst, Backend & Frontend Developers, Testers, Product Owner, Scrum Master.
T Hub is a dynamic, forward-thinking initiative where technology matters! We serve as the core of innovation within our organization. It’s a place where top talents come together to ideate, prototype, and implement cutting-edge solutions in international projects within the Deutsche Telekom Group.
Join our international team and help us build greenfield software for one of the most important projects in Deutsche Telekom Group. You will have a real impact on over 30 million customers, enabling them to request fiber network services and track installation progress.
Our product is a comprehensive ecosystem of applications and platforms supporting end‑to‑end processes such as fiber pre-ordering, ordering, installation, service management, and customer support.
Find your superposition → Apply → Talk to us → Join us!
Company

What we offer

Working at T-Mobile’s T Hub gives you the opportunity to grow in an international environment and work on impactful solutions used by millions of customers.
You will have access to a wide range of training programs and the opportunity to develop skills in areas such as AWS, DevOps, Kotlin, and modern cloud technologies.
We promote a culture of continuous learning, flexibility, and innovation, giving you the space to develop your career in line with your ambitions.

Recruitment stages

  • 1.
    Let’s meet to better understand each other's expectations.
  • 2.
    Hiring Manager will receive your application after meeting.
  • 3.
    Technical meetings with the Hiring Manager and/or team.
  • 4.
    Time to decide!

T-Mobile

Working at T-Mobile’s T Hub will offer you an unique and highly rewarding experience on IT market. As a leader in the telecommunications industry, T-Mobile not only provides a platform to hone your technical skills but also empowers you to be a catalyst for innovation. You'll have the opportunity to work at the forefront of cutting-edge technologies, from 5G to IoT and AI, shaping the future of connectivity. Our commitment to fostering a diverse and inclusive workplace means you'll collaborate with a wide range of talented professionals, learning and growing together. T-Mobile encourages a culture of continuous learning and development, offering mentorship and support to help you thrive in your career.

This is how we work

T Hub - Java Developer
I apply to:
T-Mobile
Warszawa, Mokotów
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