Senior Java Developer
ID: 7946
-
Specialization Java Developer
-
Experience Expert
-
Location Gdańsk, Kraków, Warszawa
-
Working mode Hybrid
-
Salary B2B: 1 200 – 1 550 PLN/day
Salary: 1200-1550 PLN/MD on B2B
Remote: Warszawa, Gdańsk, Kraków (with 2-3 days in the office weekly)
Why choose this offer?
-
End‑to‑end ownership with a modern tech stack
-
Stability combined with continuous growth
-
Autonomy and high‑quality collaboration
Project
Join a team building and enhancing a high-performance trading ecosystem for global financial markets. You will work on backend services responsible for trading platform integrations, order management, margin calculations, profit & loss processing, and real-time communication with external trading systems.
This role requires deep expertise in financial systems, precision-sensitive calculations, and integrations with trading platforms through REST and WebSocket APIs.
Responsibilities you’ll have:
- Design and develop backend services supporting trading platform integrations
- Integrate external trading platforms using REST and WebSocket APIs
- Implement and maintain order management workflows
- Develop margin, risk and P&L calculation services
- Ensure accuracy of financial calculations, rounding rules and currency handling
- Optimize system performance and reliability in real-time environments
- Collaborate with product, architecture and business stakeholders
- Support production incidents and participate in system improvements
- Contribute to technical design decisions and backend architecture
- Leverage AI-assisted engineering tools to improve development efficiency and quality
Expected competences and knowledge:
- 8+ years of experience in backend development
- Strong commercial experience with Java
- Strong commercial experience with Spring / Spring Boot
- Experience integrating external systems through REST APIs
- Experience working with WebSocket-based integrations
- Strong understanding of order lifecycle management
- Strong understanding of margin calculations and P&L logic
- Experience with precision-critical financial calculations
- Knowledge of currency conversion, rounding rules and financial data processing
- Experience working in distributed systems and microservice architectures
- Experience within regulated financial services, brokerage, capital markets or trading environments
- Ability to discuss practical usage of AI tools in software engineering processes
- Engineering degree is highly preferred
Nice to have:
- Experience with TraderEvolution
- Experience building trading platforms or brokerage solutions
- Knowledge of market data feeds and trading workflows
- Experience with low-latency or real-time systems
Technologies you’ll work with
- Java
- Spring Boot
- REST APIs
- WebSocket APIs
- Microservices
- Financial Trading Systems
- Order Management Systems
- Risk & Margin Services
- Real-time Data Processing
Client – why choose this particular client from the Jit portfolio?
Our client is an international financial services organization operating in the capital markets domain, focused on processing and analyzing large volumes of transactional data. The company develops modern data platforms that support trading, operational efficiency, and regulatory reporting. It operates in a fast-paced, highly regulated environment with a strong emphasis on scalability, data quality, and advanced analytics.
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 a technical interview focused on your skills and problem-solving mindset.
If both interviews go well, we’ll match you with a project aligned with your skills and expectations. You’ll then meet the client – this is where the final project-related decision is made.
Based on feedback and your preferences, we’ll prepare an offer tailored to your experience. We’ll agree on the project, salary, type of contract, and your start date.
We start with a short phone conversation to get to know each other. We’ll talk about your experience, career goals, and motivation, while giving you a chance to learn more about Jit Team and the role.
Depending on the role, you’ll complete a short recruitment task to showcase your skills. We’ll also verify your English language proficiency as part of this stage.
Next, you’ll meet your future Team Leader at our office. We’ll discuss your experience, ways of working, and how your skills match the role, while giving you a better understanding of the team and day-to-day collaboration.
If we’re a good match, we’ll prepare an offer tailored to your experience. We’ll agree on the salary, type of contract, and your start date. Welcome to Jit Team!
Benefits
We believe a great workplace is more than a set of benefits. It’s about trust, long-term relationships, and an environment where people can do their best work.
Jit Academy
Share and gain experience. Jit Academy is a platform serving a mutual 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 a variety 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 a fleet of jet skis and kites located at the beach in Chałupy.
Recommendations program
Would you recommend any IT specialist we could hire? Share the contact and gain a bonus if we hire them.
Flexible work hours
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
Up-to-date equipment
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.
English lessons
Classes conducted for small groups, lectured
by our teachers, guarantee rapid results.
Private healthcare
Take care of your wellbeing. Members of Jit Team, gain access to a wide range of medical plans provided by Medicover or PZU.
Gym membership card
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 a suitable job description, but you
still wanna be a part of The Team?
Let’s talk – your next role might not be listed yet.