Senior Java Developer (Java, Spring Boot, Microservices)

Upvanta is a company developing highly scalable fintech systems supporting trillions of dollars in transactions annually. The role involves working closely with US-based product and engineering teams and reporting to the Software Manager in Poland.

• 3–5 years of professional backend development experience.
• Strong hands-on experience with Java and Spring Boot in production systems.
• Proven experience building and maintaining backend services and APIs at scale.
• Solid understanding of SQL and NoSQL databases (e.g., PostgreSQL/MySQL, MongoDB).
• Knowledge of microservices architecture, distributed systems, and asynchronous processing.
• Experience across full SDLC: architecture, development, testing, deployment, and maintenance.
• Experience operating systems in cloud environments such as AWS or Azure.
• Excellent communication skills in English.

Nice to have:

• Experience with Spring AI.
• Previous exposure to banking, payments, trading, or financial transaction systems.
• Degree in Computer Science or equivalent practical experience.

• Design and develop backend architecture for fintech products and platforms.
• Build, maintain, and operate high-performance Java / Spring Boot microservices running in production environments.
• Develop scalable APIs and backend workflows with strong emphasis on data consistency, fault tolerance, and reliability.
• Own features end-to-end: from implementation through deployment and production support.
• Debug and resolve complex issues in distributed systems and high-volume production environments.
• Work closely with US-based teams to translate product requirements into robust backend solutions.
• Write clean, maintainable code and contribute to technical documentation, diagrams, and system workflows.
• Participate in code reviews and continuously improve backend quality and engineering standards.