Senior Java Developer

Senior • Hybrid

20,000 - 26,000 PLN/hr

Warsaw, Poland

Salary: 1000 - 1300 PLN/MD on B2B

Work model: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (3 days per week from the office)

Why choose this offer?

Opportunity to build a fintech platform from scratch (greenfield project)
Real impact on architecture and core frontend services from day one
Collaboration within a cross-functional, international team
Work on a large-scale financial platform in the banking domain

Project

We are building a new fintech platform from the ground up for a financial institution operating in the banking products space. As a Senior Java Developer, you will join a cross-functional squad (backend and frontend developers, QA, Business Analyst) and work on designing and developing core backend components.

This is a greenfield initiative, where architecture, standards, and development patterns are defined from day one. Senior engineers play an active role in shaping technical direction and ensuring high code quality. You will work closely with Delivery Manager in an agile setup.

Responsibilities you'll have:

Design, develop, and maintain backend services using Java
Build and evolve microservices based on the Spring ecosystem
Work with event-driven and asynchronous communication patterns
Collaborate closely with frontend and platform teams
Actively participate in code reviews and ensure high engineering standards
Contribute to architectural and technical decision-making
Support and mentor less experienced developers
Identify and address technical risks and bottlenecks
Communicate technical topics effectively in English

Expected competences and knowledge:

Minimum 6 years of commercial experience in software development
Strong hands-on expertise in Java
Very good knowledge of Spring (Spring Boot, Spring MVC, Spring Cloud)
Experience with event-driven architectures (message brokers, asynchronous processing, events)
Practical experience with PostgreSQL or another relational database
Experience working in microservices-based environments
Understanding of frontend architecture and concepts, with particular focus on React
(ability to collaborate efficiently with frontend developers, review high-level solutions, understand integration points and trade-offs)
Familiarity with agile methodologies (Scrum / Agile)
Fluent English (spoken and written)

Nice to have:

Experience with React
Experience with Kafka or similar streaming platforms
Familiarity with Google Cloud Platform (GCP)
Experience with Kubernetes and containerized deployments
Background in fintech or banking projects
Previous work on greenfield systems

Technologies you'll work with

Java
Spring (Boot, MVC, Cloud)
PostgreSQL
Event-driven architecture
Microservices

Nice to have:

React
Kafka
GCP
Kubernetes

Client – why choose this particular client from the Jit portfolio?

The client is a fintech institution operating in the Kingdom of Saudi Arabia, focused on modernising its digital capabilities and expanding its offering for micro-SME customers. It is an organisation with a strong market presence and a clear strategic commitment to innovation, aiming to deliver banking experiences that are fully digital, user-friendly, and deeply integrated with day-to-day business needs.

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.

Wymagania

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Jit Team

Jit Team is a Polish company that operates in the IT industry, focusing on creating highly specialized teams for clients worldwide. With over 700 experienced experts, Jit Team emphasizes the human factor in IT, prioritizing people and their development. The company is deeply committed to its philosophy of "The Human factor of IT," which is reflected in its charitable and educational activities, such as supporting students with learning equipment and offering internships to launch IT careers. Jit Team has been active for over 15 years and is known for its strong relationship with a leading financial group in the Nordic countries, serving as their premier partner in Poland. The company values work-life balance, feedback culture, and international collaboration, often working in teams that provide exposure to the English language. Jit Team is also involved in supporting local initiatives, ensuring the circulation of positive energy within the community.

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