Back-End Software Engineer; Java​/Kotlin Warsaw

Back-End Software Engineer (Java/Kotlin)

Poland

Join Exadel as a Back-End Software Engineer and bring bold ideas to life on a long‑term global project. You’ll write clean code, drive impact, and have a real voice at the table.

We’re an AI‑first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.

From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.

What powers it all? Our people are ambitious, collaborative, and constantly evolving.

An international transportation technology company focused on building scalable digital solutions for modern rail operations. The organization develops internal platforms and automation tools that improve operational efficiency, support business growth, and streamline complex processes in a fast‑paced environment.

• Develop and maintain backend microservices for e-commerce platforms
• Work in a cross‑functional, self‑organized Agile team
• Analyze and drive technical improvements
• Ensure high engineering quality through testing and code reviews
• Take ownership of features end‑to‑end, from design to production
• Contribute to the continuous improvement of existing systems
• Use modern development tools and AI‑assisted engineering solutions responsibly

• 3+ years of experience building backend systems with Java or Kotlin (or willingness to learn Kotlin)
• Experience with Spring Boot and microservices architecture
• Good understanding of OOP and software design patterns
• Experience with Postgre
  
  SQL or other relational databases
• Knowledge of testing principles and engineering best practices
• Familiarity with CI/CD pipelines and production deployments
• Strong communication skills in English

• Experience with Akka/Pekko
• Experience with Docker and Kubernetes
• Knowledge of Kafka and event‑driven architectures
• Understanding of Event Sourcing and CQRS
• Experience with AWS cloud services

Upper‑Intermediate

• Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
• Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
• Please note:
  
  this job description is not exhaustive. Duties and responsibilities may evolve based on business needs

Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details.

• International projects
• In‑office, hybrid, or remote flexibility
• Medical healthcare
• Recognition program
• Ongoing learning & reimbursement
• Team events & local benefits
• Sports compensation

We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.