Senior Fullstack Developer Warszawa B2B 1 000 – 1 200 PLN/day

Jit; Warszawa; Hybride; PLN 180 000 - 260 000; Plein temps

Avantages offerts par ce poste

Flexible work organization

English language in international team

Training financed by Jit

Mental health support

Teambuilding events

Life insurance

Résumé du poste

Jit seeks a backend Java professional to design, develop, test, and maintain digital banking services for Nordic customers. You will work in a hybrid setup across Gdańsk/Warsaw, collaborating with agile teams and stakeholders to ensure scalable solutions.

The role emphasizes unit/integration testing, modern Java tooling, and leveraging AI-assisted coding to accelerate delivery. Join a culture with strong work-life balance and international exposure.

Qualifications

• Proven experience with Java and Spring Boot 3.5 in a backend role.
• Experience with unit and integration testing using JUnit 5, AssertJ, WireMock.
• Knowledge of SQL, JDBC, Hibernate and Spring Template.
• Experience using AI-assisted coding tools to accelerate tasks.

Responsabilités

• Design, develop, test and maintain backend services for digital banking platforms.
• Drive backend testing within an agile team to ensure quality and scalability.
• Collaborate with stakeholders to translate requirements into solutions.
• Support business analysis and translate needs into technical tasks.
• Contribute to the full product lifecycle and operational support.

Connaissances

Java 21+ and Spring Boot 3.5

AI-assisted coding tools

Unit & integration testing (JUnit 5, 5

SQL, JDBC, Hibernate

Git, Maven, OpenAPI/Swagger, Jenkins

Outils

Git

Maven

OpenAPI/Swagger

Jenkins

Description du poste

Work model: hybrid from Gdańsk / Warsaw (2/3 days per week from the office)

Why choose this offer?

• You can expect a flexible work organization
• The international work environment will give you the opportunity to interact with the English language on a daily basis
• Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
• The Jit community will bring you a nice time during regular integration meetings

Project

You will be involved in a financial services project focused on developing and enhancing digital business banking solutions for customers across the Nordic region, including Denmark, Finland, Sweden, and Norway. The project involves a modern, large-scale banking platform and customer-facing web and mobile banking services.

Responsibilities you’ll have:

• Designing, developing, testing, and maintaining backend services for digital banking platforms.
• Driving backend testing activities within an agile team to ensure high-quality, reliable, and scalable solutions.
• Collaborating with business stakeholders to understand requirements and contribute to solution design.
• Supporting business analysis activities and translating business needs into technical solutions.
• Using AI-assisted tools in daily development, testing, and automation of routine tasks.
• Contributing to the full product lifecycle, from technical design and implementation to continuous improvement and operational support.

Expected competences and knowledge

• Practical experience with Java (21+) and Spring Boot 3.5, with knowledge of the ongoing transition to JDK 25+ and Spring Boot 4.x.
• Knowledge of Git, Maven, OpenAPI (Swagger), and CI/CD release procedures using Jenkins.
• Experience with unit and integration testing using JUnit 5, AssertJ, and WireMock.
• Knowledge of SQL, JDBC, Spring Template, and ORM using Hibernate.
• Ability to use AI-assisted coding tools effectively to accelerate development, testing, and automation of routine tasks.

Technologies you’ll work with

• SQL, JDBC, Hibernate
• AI-assisted coding tools

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

Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client’s premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer’s work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language.

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 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.

Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.

Here’s how we get from first “hello”
to “welcome aboard”

You’ll meet with our HR team to discuss your experience, approach to software development, and teamwork. We’ll also verify your English language proficiency as part of the conversation. Then, you’ll take part in atechnical interview focused on your skills and problem-solving mindset.

We believe agreat workplace is more than aset of benefits. It’s about trust, long-term relationships, and an environment where people can do their best work.

Share and gain experience. Jit Academy is aplatform serving amutual knowledge exchange. Lecture others and share your expertise or join the audience.

Jit Communities

Join the group of experts. We ensure constant growth, that’s why we keep building communities dedicated to mutual education.

Growth support

We value people who are looking to develop their skillset. We proudly finance avariety of courses and certifications so that you can gain new competencies.

Jit Summer Office

Gain access to the office located at the very beach in Chałupy. Jit Trailer awaits visits of the team members and their families.

Jit Boats

Cruise the bay thanks to the motorboat awaiting at the Yacht Park in Gdynia. Furthermore, there is afleet of jet skis and kites located at the beach in Chałupy.

Start the day without haste.
At Jit, we begin and finish the day of work within a certain time frame, in stead of fixed hours.

Bonuses for content creators

We provide bonuses to those willing to participate in industry events as public speakers, and to content creators writing articles for our blog.

Mental health support

Mental health is fundamental. Take advantage of psychologists and psychotherapists’ support and reach for psychoeducational content on the wellbeing platform

We provide our teams with high-quality gear necessary to work. Choose between MacOs or Windows and work the way you prefer.

Teambuilding events

Meet new, interesting people. We’re dedicated to building human relations and often host informal events that bound our team members.

Classes conducted for small groups, lectured
by our teachers, guarantee rapid results.

Take care of your wellbeing. Members of Jit Team, gain access to awide range of medical plans provided by Medicover or PZU.

We provide Multisport and Medicover Sport gym cards so that you can improve your physical condition.

Life insurance

Increase your safety. No matter the form of employment, we provide life insurance plans to our colleagues.

Haven’t found asuitable job description, but you
still wanna be apart of The Team?

Let’s talk – your next role might not be listed yet.