Senior Java Developer

Project/Client: Fintech
Location: Lithuania
Start Date: ASAP
Duration: 12 months
Language: English
Role Overview:
We are looking for a Senior Java Developer to join a fintech project focused on scalable backend systems, data integration, and event-driven architecture. The role involves developing Java / Spring Boot microservices and working with data streaming and/or Data Warehouse solutions.
Key Responsibilities:
Design, develop, and maintain backend services using Java and Spring Boot
Build and support microservices and event-driven solutions
Work with messaging and data streaming tools such as Kafka, RabbitMQ, or similar technologies
Contribute to data integration, CDC, ETL/ELT, and/or DWH-related initiatives
Work with relational databases such as PostgreSQL, MS SQL Server, or similar
Collaborate with engineering, data, DevOps, and business teams
Must-Have Requirements:
Strong hands-on experience with Java and Spring Boot
Proven experience with microservices architecture
Hands-on experience with Kafka, RabbitMQ, or similar messaging/streaming technologies
Experience with data streaming and/or Data Warehouse / DWH projects
Good knowledge of relational databases (PostgreSQL, MS SQL Server, or similar)
Fluent English
Nice to Have:
Previous experience in fintech, banking, or financial systems
What We Offer
Model: B2B contract with Bonapolia - one contract, one monthly invoice
Rate: negotiated per candidate seniority and client budget
Payment: monthly invoice, paid on the same schedule the client pays us (usually 30 days)
Contract written under your country's law
We handle the client-side paperwork: MSA, NDA, invoicing
🏢 About Bonapolia
Bonapolia is a family-owned IT staff augmentation team based in Lisbon. We build engineering teams for product companies and IT consultancies across Europe and the US.
More at bonapolia.com
📩 Ready to Join?
We look forward to receiving your application and welcoming you to our team!

Work arrangement
Yes