Senior Java Developer (m/k/n)

Wymagania: - 5 -15 years of professional backend development experience. - Strong hands-on experience with Java and Spring Boot in production systems. - Previous exposure to banking, payments, trading, or financial transaction 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. - Highly hands-on engineer who enjoys owning production-grade code. - Comfortable working in a fast-paced, startup or high-growth environment. - Strong analytical thinking, problem-solving ability, and attention to detail. - Clear communicator, confident in collaborating with international teams. - Friendly, proactive, and motivated to grow with the company and product. Mile widziane: - Experience with Spring AI. - Degree in Computer Science or equivalent practical experience. O firmie: - Welcome to Upvanta, where our motto is “We Care More”. - Founded in 2018, we have grown into a dynamic IT services company with a team of over 180 dedicated professionals. Our journey has been marked by exceptional year-over-year growth, driven by our unwavering commitment to our clients. Zakres obowiązków: - 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. Oferujemy: - B2B:1100-1200 PLN/MD