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Senior Java Developer

https://www.circlek.com Logo

Circle K

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Location:
Poland , Warszawa

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Category:
IT - Software Development

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Contract Type:
Employment contract

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Salary:

Not provided
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Job Description:

Circle K Business Centre Warsaw is a shared service center supporting Circle K Europe across IT, Finance, Human Resources, Customer Service and other business areas. Circle K is part of Alimentation Couche-Tard Inc., one of the world's largest convenience retail companies, operating globally across North America, Europe, Asia and the Middle East, with over 12,300 locations worldwide. Our continuously growing development organization (300+ IT professionals) delivers large‑scale software solutions used daily by millions of customers across Europe and North America.

Job Responsibility:

  • Design and develop backend services within Circle K’s loyalty ecosystem
  • Build and maintain scalable, highly available microservices
  • Develop and evolve REST APIs used by mobile and web applications
  • Contribute to architectural and technical decisions
  • Ensure high code quality through reviews and best engineering practices
  • Mentor and support less experienced developers
  • Collaborate with Product Owners, QA Engineers, Architects and other teams

Requirements:

  • At least 5 years of commercial experience in Java backend development
  • Strong knowledge of Java (17+) and Spring ecosystem (Spring Boot, Spring Data, Security, Web/WebFlux, Integration)
  • Experience in designing and implementing RESTful APIs
  • Hands-on experience with microservices architecture
  • Experience with relational databases, especially PostgreSQL
  • Experience with non-relational/NoSql databases like Azure CosmosDB
  • Experience with asynchronous communication patterns (queues/topics)
  • Experience with CI/CD pipelines like GitHub Actions, Azure Pipelines or Jenkins
  • Experience with Docker and Kubernetes
  • Strong knowledge of Gradle 8+
  • Experience working in cloud environments (Microsoft Azure)
  • Knowledge of clean code principles and software design patterns
  • Experience working in Agile environments (Scrum)
  • Fluent English (B2/C1)

Nice to have:

  • Experience with event-driven architectures (e.g. Kafka)
  • Understanding of how AI‑based tools and solutions can support software development and product features
  • Knowledge of Domain-Driven Design (DDD)
  • Knowledge of Test-Driven-Develop (TDD)
  • Experience with observability and monitoring tools
  • Experience in loyalty, e-commerce or large-scale consumer platforms
  • Technical leadership or mentoring experience
What we offer:
  • Contract of employment
  • Annual bonus
  • Private medical care
  • Cafeteria Platform/Multisport
  • English lessons subsidized by the company
  • Group insurance
  • Attractive discounts for products and services at our stations
  • Employee stock purchase plan
  • Employee Assistance Program (Lyra)
  • Modern and convenient office
  • Trainings & possibility to develop skills in a wide international environment

Additional Information:

Job Posted:
April 27, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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