July 3, 2026

Java Engineer

Senior • Hybrid

Warsaw, Poland

About Webellian

Webellian is a well-established Digital Transformation and IT consulting company committed to creating a positive impact for our clients. We strive to make a meaningful difference in diverse sectors such as insurance, banking, healthcare, retail, and manufacturing. Our passion for cutting-edge and disruptive technologies, as well as our shared values and strong principles, are what motivate us. We are a community of engineers and senior advisors who work with our clients across industries, playing a deep and meaningful role in accelerating and realizing their vision and strategy.

About the position

We are looking for an experienced Backend (Java) Engineer to join a long-term project in the insurance domain. The project brings together three interconnected applications into a unified ecosystem supporting claims handling, valuation management, and comparison of repair estimates with counter-offers.

The role focuses on backend development in a highly integrated environment, where multiple systems communicate through APIs. You will contribute to the development and maintenance of backend services while ensuring seamless integration between applications.

Key responsibilities:

  • Develop and maintain backend solutions using Java and PostgreSQL.

  • Implement and maintain integrations between multiple systems using APIs.

  • Collaborate with cross-functional teams to deliver reliable and scalable solutions.

  • Support the modernization of existing applications, including Java version upgrades.

  • Apply secure coding practices throughout the software development lifecycle.

Required Experience & Skills

Must have

  • Commercial experience with Java 8 backend development (experience in upgrading Java versions is a plus).

  • Experience working with PostgreSQL.

  • Experience integrating systems via REST APIs in a complex, interconnected environment.

  • Knowledge of Apigee.

  • Understanding of application security principles, including OWASP Top 10 and secure coding best practices.

Nice to have

  • Experience upgrading applications to newer Java versions.

  • Experience with AWS.

  • Experience with Docker and Kubernetes.

  • Experience with AI-based OCR and document processing.

What we offer

  • Contract under Polish law: B2B or Umowa o Pracę

  • Benefits such as private medical care, group insurance, Multisport card

  • There are English classes available

  • Hybrid work (at least 1 day/week on-site) in Warsaw (Mokotów)

  • Opportunity to work with excellent professionals

  • High standards of work and focus on the quality of code

  • New technologies in use

  • Continuously learning and growth

  • International team

  • Pinball, PlayStation & much more (on-site)

Join a growing team of dedicated professionals! We love to pass on the knowledge to grow excellence, speak our minds without playing politics, and just enjoy hanging around together. If you share our passions - we want to meet you! So go ahead and apply ➡️

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Warsaw, Poland

21,000 - 23,100 PLN

🏢 Summary: Senior Java Developer with AI Integration role focused on building scalable, enterprise-grade claims management solutions using Java, Spring Boot, microservices, and AI-powered automation in a hybrid Warsaw-based environment. The position involves developing backend services, integrating AI/ML components, and contributing to event-driven architectures within Agile teams. 🗂️ Requirements: 5+ years of Java development experience in enterprise environments, Strong knowledge of Spring and Spring Boot, Experience with microservices, Basic Kubernetes knowledge, Proficiency with GIT, Experience with Oracle or PostgreSQL databases, Experience with transactional data systems, Testing experience with JUnit, Testing experience with Spock, Experience with Testcontainers, Experience with automated pipelines, Experience with messaging systems and asynchronous integrations, Experience delivering AI-based solutions or ML/LLM integrations, Communicative English, Polish language skills, Legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Kubernetes, GIT, Oracle, PostgreSQL, JUnit, Spock, Testcontainers, Microservices, CQRS, DDD, EDA, Angular, LLM, ML, AI 🏢 Description: Unleash the future of claims management — revolutionize enterprise solutions with innovative backend services and AI-powered automation! Warsaw-based opportunity with hybrid work model (only 1 day x week in the office) As a Senior Java Developer with AI Integration , you will be working for our client, a leader in the insurance industry, specializing in building scalable, enterprise-grade solutions for claims processing. You will contribute to transforming traditional workflows through cutting-edge backend development and intelligent automation, driving operational excellence and exceptional customer experiences. This role offers a unique chance to grow within a forward-thinking organization committed to innovation in insurance technology. Your main responsibilities: Design, develop, and maintain high-quality services in Java (8/11/17/21) and Spring Boot, aligning with business needs in claims management. Collaborate with cross-functional teams to ensure smooth integration and delivery of scalable solutions. Participate in code reviews, testing, and documentation to uphold software quality standards. Implement architectures based on DDD, CQRS, Hexagonal Architecture, and EDA to support robust, event-driven microservices. Work with containerization and orchestration tools such as Kubernetes to ensure deployment efficiency. Build and integrate AI-enabled components, including automation, classification, and information extraction modules. Contribute to Agile/Scrum teams, proposing solutions and delivering end-to-end features with independence and ownership. Drive production stability and continuous improvement of enterprise solutions. You're ideal for this role if you have: Minimum 5 years of experience in Java development within enterprise environments. Strong knowledge of Spring and Spring Boot frameworks. Experience working with microservices and basic Kubernetes knowledge. Proficiency in GIT, relational databases (Oracle/PostgreSQL), and transactional data systems. Testing experience with JUnit, Spock, Testcontainers, and automated pipelines. Experience with messaging systems and asynchronous integrations. Demonstrated autonomy, strong ownership mindset, and team collaboration skills. Proven experience delivering AI-based solutions or integrations with ML/LLM services. It is a strong plus if you have: Experience with Angular 14+ (full-stack development). Hands-on practice designing AI solutions considering security, compliance, and enterprise constraints. Product-oriented mindset with a good understanding of business processes. Language Required for the role: Communicative level of English. Polish language skills are required. Eligibility for the role: Only candidates with a valid legal right to work in the European Union will be considered. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

Technology

ITDS

Senior Java Developer with AI Integration

Senior

Remote

Warsaw, Poland

21,000 - 25,200 PLN

🏢 Summary: Senior Java Developer role focused on building scalable, enterprise-grade claims management systems with AI-powered automation. The position involves developing event-driven microservices using modern Java and Spring Boot, integrating AI/ML components, and ensuring production stability in an Agile environment. Hybrid work model with strong emphasis on backend architecture and intelligent automation. 🗂️ Requirements: Minimum 5 years of Java development experience in enterprise environments, Strong knowledge of Spring and Spring Boot, Experience with microservices architecture, Basic knowledge of Kubernetes, Proficiency with Git, Experience with Oracle or PostgreSQL databases, Experience with JUnit, Spock, and Testcontainers, Experience with messaging systems and asynchronous integrations, Experience delivering AI-based solutions or integrating ML/LLM services, Communicative English, Polish language skills, Valid legal right to work in the European Union 📃 Skills: Java, Spring, SpringBoot, Microservices, Kubernetes, Git, Oracle, PostgreSQL, JUnit, Spock, Testcontainers, CQRS, DDD, Hexagonal, EDA, Messaging, AI, ML, LLM, Angular, Scrum 🏢 Description: Unleash the future of claims management — revolutionize enterprise solutions with innovative backend services and AI-powered automation! Warsaw-based opportunity with hybrid work model (only 1 day x week in the office) As a Senior Java Developer with AI Integration , you will be working for our client, a leader in the insurance industry, specializing in building scalable, enterprise-grade solutions for claims processing. You will contribute to transforming traditional workflows through cutting-edge backend development and intelligent automation, driving operational excellence and exceptional customer experiences. This role offers a unique chance to grow within a forward-thinking organization committed to innovation in insurance technology. Your main responsibilities: Design, develop, and maintain high-quality services in Java (8/11/17/21) and Spring Boot, aligning with business needs in claims management. Collaborate with cross-functional teams to ensure smooth integration and delivery of scalable solutions. Participate in code reviews, testing, and documentation to uphold software quality standards. Implement architectures based on DDD, CQRS, Hexagonal Architecture, and EDA to support robust, event-driven microservices. Work with containerization and orchestration tools such as Kubernetes to ensure deployment efficiency. Build and integrate AI-enabled components, including automation, classification, and information extraction modules. Contribute to Agile/Scrum teams, proposing solutions and delivering end-to-end features with independence and ownership. Drive production stability and continuous improvement of enterprise solutions. You're ideal for this role if you have: Minimum 5 years of experience in Java development within enterprise environments. Strong knowledge of Spring and Spring Boot frameworks. Experience working with microservices and basic Kubernetes knowledge. Proficiency in GIT, relational databases (Oracle/PostgreSQL), and transactional data systems. Testing experience with JUnit, Spock, Testcontainers, and automated pipelines. Experience with messaging systems and asynchronous integrations. Demonstrated autonomy, strong ownership mindset, and team collaboration skills. Proven experience delivering AI-based solutions or integrations with ML/LLM services. It is a strong plus if you have: Experience with Angular 14+ (full-stack development). Hands-on practice designing AI solutions considering security, compliance, and enterprise constraints. Product-oriented mindset with a good understanding of business processes. Language Required for the role: Communicative level of English. Polish language skills are required. Eligibility for the role: Only candidates with a valid legal right to work in the European Union will be considered. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.