Backend Java Developer

Join an internal development team supporting a US-based FinTech client in the cryptocurrency sector. You will work on a mix of new features and maintenance of an existing legacy system. This role requires a "detective" mindset—often, the business and technical logic must be extracted directly from the code, as documentation may be sparse.

Details

• Client Location: USA 

• Rate:110-130 PLN/h net + VAT (B2B)

• Start Date: ASAP (within 1 month).

• Duration: Long-term (no defined end date).

• Working Hours: Availability until 17:00–17:30 CET (ensuring a 2-hour overlap with the US).

• Equipment: Dedicated laptop provided (includes an activity tracker, currently inactive but present).

Responsibilities

• Full-Cycle Development: Developing new functionalities and maintaining the existing crypto platform.

• Legacy Management: Working with "spaghetti code" and legacy architectures to ensure stability and growth.

• Technical Research: Independently discovering business and technical logic within areas where the client lacks documentation.

• Collaboration: Participating in weekly cross-team "Grand Dailies" and ad-hoc meetings with the Product Owner.

• Communication: Direct, fluent communication with the US-based client.

Requirements

Technical Requirements

• Core: Strong proficiency in Java and Spring framework.

• Architecture: Hands-on experience with Microservices and gRPC.

• Data & Messaging: Solid knowledge of MySQL and Kafka.

• Problem Solving: Ability to navigate and refactor complex, undocumented legacy systems.

Soft Skills

• Proactivity: High level of independence in seeking information and solving technical debt.

• English: Excellent verbal and written communication (Fluent/B2+).

• Teamwork: Maturity in working within a self-managed team structure.