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Circle K
Eastern Europe

Intern Java Backend Developer

Warsaw, Poland
2026-03-09

Role Description

**Opis stanowiska pracy** We are looking for a **Java Back-End Developer Intern** to join our dynamic engineering team. As an intern, you will contribute to the development and enhancement of our **EV and Fuel platforms** , working on **microservices architecture, cloud integration, and API development** . You will gain hands-on experience in enterprise-level application development while collaborating with senior developers, architects, product managers and other roles involved in SDLC. **Key Responsibilities** * Assist in developing and maintaining RESTful APIs using Java and Spring Boot for eMobility services. * Work with databases (PostgreSQL, MySQL) to store and process EV charging and mobility data * Write clean code and follow best practices and participate in code reviews. * Collaborate with senior developers to debug, optimize, and enhance backend services * Participate in Agile development processes, including daily stand-ups and code reviews **Technical Requirements** * Understanding of Java programming fundamentals * Understanding of basic OOP principles * Basic understanding of algorithms and data structures * Basic understanding of SQL and database management * Basic understanding of RESTful APIs * Familiarity with Git * Exposure to testing frameworks * Exposure to frameworks like Spring or Hibernate (optional) * Interest in emerging technologies, especially in AI tolls supporting SDLC. **Soft Skills** * Willingness to learn * Good communication * Team collaboration * Basic problem-solving * English level B2\+ (written and spoken) \+ IT terminology. **What We Offer** * Hands-on experience with modern backend technologies in the Retail, EV and Fuel market in Global scale. * Hands-on experience with SCRUM and SAFe * Exposure to industry-leading smart EV and Fuel projects * Mentorship from experienced developers and domain experts * Potential for a full-time offer upon completion of the internship Check who we are here: https://youtu.be/td-QGnNnvW0 Want to know even more about us? Take a look at our career page: https://workwithus.circlek.com/global/en/businesscentrewarsaw **Interested? We encourage you to apply.** We know great companies are built from within, by great people like you. Come grow with us! We´re looking forward to your application *We hereby inform that in the company Circle K Business Centre Poland sp. z o.o. with registered office in Warsaw an Internal Notification and Follow-up Actions Procedures applies.* *The document describes rules for reporting violations of law by whistleblowers. Full content of the above-mentioned Procedure is available here:* https://www.circlek.pl/o-nas/procedury-zgloszen

Intern Java Backend Developer

Circle K

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