Senior Java Developer

We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting-edge solutions and services that keep them at the forefront of innovation.

Job requirements

Senior Java Developer

SKILLS: Java | Spring Boot | AWS| Apache Kafka | PostgreSQL | REST | SOAP

B2B: PLN 130 - 160 / Hour 💰

LOCATION: POZNAN, POLAND

START DATE: ASAP

Key Duties and Requirements: A Roadmap to Your Professional Success 🚀

Scope of responsibilities:

• Designing and developing backend services using Java 17+ and Spring Boot (JEE is not applicable for this project).

• Building and maintaining scalable microservices-based architecture.

• Developing and maintaining RESTful APIs.

• Working with distributed systems and messaging using Apache Kafka.

• Integrating applications with PostgreSQL databases.

• Implementing authentication and authorization using Keycloak.

• Ensuring observability with Prometheus and Grafana.

• Deploying and maintaining services in AWS using Docker and Kubernetes (EKS).

• Supporting CI/CD pipelines using Flux and Git-based workflows.

• Troubleshooting and debugging complex issues in distributed environments.

• Writing clean, testable code with unit and integration tests.

• Participating in the full SDLC: analysis, design, implementation, testing, and deployment.

• Collaborating with cross-functional teams (frontend, product owners, DevOps, ICT).

Here’s a set of skills we require:

• 8+ years of professional experience with Java.

• Strong hands-on experience with Spring Boot (JEE is not applicable).

• Solid understanding of microservices architecture and distributed systems.

• Experience building RESTful APIs.

• Strong relational database experience (PostgreSQL preferred).

• Hands-on experience with Apache Kafka (messaging).

• Experience with Redis.

• Familiarity with Keycloak (authentication and authorization).

• Experience with Prometheus & Grafana (observability).

• Experience deploying applications in AWS.

• Hands-on experience with Docker and Kubernetes (EKS).

• CI/CD experience with Flux and Git pipelines.

• Unit and integration testing experience.

• Strong problem-solving skills and ability to work independently.

• Proactive mindset and ownership of delivered solutions.

• At list Upper-Intermediate level of English

• Polish language - native

• Architectural thinking: understanding the rationale behind microservices patterns and design decisions.

• End-to-end SDLC ownership: from analysis and design through development, testing, and deployment.

  
  

Nice to have experience with:

• Agile methodologies (Scrum, Kanban).

• High-volume databases, query optimization, and performance tuning.

• Production system maintenance.

• Advanced cloud services and containerization.