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Technologies-expected : Java AWS Cloud Watch Cloud Formation Elastic Search Spring Boot My SQL Postgre SQL technologies-optional : Type Script Java Script Node.js about-project : Our client is an American company with an established position in the market that has served for nearly 20 years. They help Saa S businesses grow, scale and reach their full potential. By joining them, youll work on specific products from their growing portfolio. The products are designed for several sectors: one is a property management app, and the second is a mobile application connecting long-haul truck drivers. Were looking for a Senior Backend Developer who will be responsible for developing and maintaining our backend services and ensuring the reliability and scalability of our systems. You will join an international team in their Krakow-based entity with Backend and Frontend Engineers who work on a property management application. Its a new product in the US designed for real estate agents. Stack: Java, Spring Boot, AWS, Java Script, Graph QL, REST API, Dynamo DB B2 B: 170 - 195 PLN net/h + VAT Uo P: 25 500 - 29 500 gross/month Working model: Hybrid - 3 days a week from the office Location: Krakow, al. Pokoju responsibilities : Designing, building, and maintaining efficient, reusable, and reliable Java code for our backend systems. Ensuring the best possible performance, quality, and responsiveness of applications. Identifying bottlenecks and bugs, and proposing solutions to these problems. Maintaining code quality, organization, and automation. Working closely with other engineers to integrate backend systems with our front-end services. requirements-expected : A minimum of 5 years of proven experience in backend development. In-depth knowledge of Java and related ecosystems. Strong understanding of AWS Services(the ones used in the project are Cloud Watch, App Sync, SES, SQS, Cognito, Cloud Formation, S3, Elastic Search, ECS, API Gateway... but we dont expect to know all of them). Excellent verbal and written English communication skills and basic Polish. offered : Flexibility to choose between Uo P and B2 B contract. Package of benefits on Uo P (Multisport, life insurance, healthcare plan) and a possibility to order them on B2 B. Freedom to choose your hardware - Mac Book Pro or Lenovo. Flexible working hours: start between 8:00-10:00 am. Flexible work from the office policy - you can select the weekdays you work from the office. benefits : sharing the costs of sports activities private medical care life insurance flexible working time