Senior Java Developer

Salary: 1000 - 1300 PLN/MD on B2B

Work model: hybrid from Gdynia / Gdańsk / Warszawa / Rzeszów / Kraków (2 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.

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