Senior Java Developer

Altimetrik Poland is a digital enablement company. We deliver bite-size outcomes to enterprises and startups from all industries in an agile way to help them scale and accelerate their businesses. We are unique in Poland's IT market. Our differentiators are an innovation-first approach, a strong focus on core development, and an ability to attack the challenging and complex problems of the biggest companies in the world.

For one of our clients in the payment industry, we are looking for a Senior Java Developer.

Hybrid work - 3 days in the office in Warsaw

Requirements:

• Strong experience in Java 17+ (modern language features, streams, concurrency, performance considerations)

• Hands-on experience with the Spring Boot stack, including:

  • Spring Web (RESTful APIs)

  • Spring Data

  • Spring Security (authentication, authorization, JWT/OAuth2)

• Solid knowledge of NoSQL databases, with a strong focus on MongoDB

  • Data modeling, indexing, performance tuning

• Experience designing and building scalable, high-performance backend services

• Understanding of microservice architectures

• Experience with REST APIs, JSON, HTTP standards, and API versioning

• Familiarity with testing practices (unit, integration tests; JUnit, Mockito, etc.)

• Experience working in an Agile/Scrum environment

• Good understanding of clean code principles, SOLID, and best practices

  
  

Domain Knowledge

• Experience in or strong interest in the Fintech domain

  • Payments, transactions, financial data handling

  • High availability, security, and data consistency requirements

    
    

Nice to Have

• Experience with AWS (e.g. EC2, ECS/EKS, S3, RDS/DynamoDB, CloudWatch)

• Knowledge of Docker and containerized deployments

• Experience with CI/CD pipelines

• Exposure to event-driven systems (Kafka, SQS, etc.)

  
  

🔥We grow fast.

🤓We learn a lot.

🤹We prefer to do things instead of just talking about them.

If you would like to work in an environment that values trust and empowerment... don't hesitate, just apply!