Senior developer on Jit's team building an Automated Security Retest Engine for a Nordic banking client: developing Python processing pipelines and a Java Spring Boot app with REST APIs, integrating AI/LLM services and security tooling. Hybrid (3 days/week office) in Gdynia/Gdańsk/Warsaw; B2B 1,000–1,300 PLN/day.
Compensation
PLN 1K–PLN 1.3K / day
Location
Poland
Work setup
Hybrid
Seniority
Senior
Employment
Not specified
Experience
5+ years
Category
Ai engineering
Posted
Skills
ai
api
automation
ci-cd
cloud
cybersecurity
dast
docker
java
llm
macos
maven
owasp
pytest
python
rest
sast
spring
sql
test-automation
vulnerability-management
Must have
Min. 5 years of professional experience in Python and/or Java development
Experience developing and maintaining backend applications
Experience creating and consuming REST APIs
For Java development: hands-on experience with Spring Boot
For Python development: experience building modular applications and maintainable codebases
Understanding of software engineering best practices
Experience with automated testing
Strong analytical and problem-solving skills
Good communication skills and English proficiency
Nice to have
Experience working with both Python and Java
Experience integrating LLM APIs or building AI-assisted workflows
Knowledge of structured-output validation and error-handling mechanisms
Experience with application security testing
Knowledge of DAST and SAST methodologies
Experience with tools such as OWASP ZAP, Nuclei, Semgrep, pytest
Experience in security test automation
Experience with PDF processing, OCR, or document extraction solutions
Experience with SQL databases
Experience with Maven, CI/CD pipelines, Docker, or cloud services
Interest in cybersecurity, vulnerability management, and security engineering
Full description
Work model: hybrid from Gdynia / Gdańsk / Warszawa(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
Join a team developing the Automated Security Retest Engine, an innovative platform designed to automate the analysis of security assessment reports and verify remediation activities. The solution helps streamline the security retesting process by combining software engineering, security automation, and AI-assisted workflows.
As a Developer, you will contribute to the ongoing development of both the Python-based processing pipeline and the Java Spring Boot application that provides the user interface. You will work closely with security specialists and product stakeholders to build scalable, maintainable, and secure solutions.
The role offers a unique opportunity to combine software engineering,application security, automation, and AI technologies within an international banking environment.
Responsibilities you’ll have
Design, develop, and maintain features within the Automated Security Retest Engine
Develop and enhance Python-based processing pipelines
Build and maintain backend services and REST APIs
Contribute to the Java Spring Boot web application
Integrate external tools, APIs, and AI/LLM-based services
Improve reliability, accuracy, and quality of generated security tests and analysis
Write automated unit and integration tests
Investigate, troubleshoot, and resolve software defects
Maintain technical documentation and development standards
Collaborate with security experts and product stakeholders to transform requirements into practical solutions
Ensure the platform adheres to application security requirements and best practices
Protect sensitive data, credentials, and security-related information
Must have competences and knowledge
Min. 5 years of professional experience in Python and/or Java development
Experience developing and maintaining backend applications
Experience creating and consuming REST APIs
For Java development: hands-on experience withSpring Boot
For Python development: experience building modular applications and maintainable codebases
Understanding of software engineering best practices
Experience with automated testing
Strong analytical and problem-solving skills
Good communication skills and English proficiency
Nice-to-have competences and knowledge
Experience working with both Python and Java
Experience integrating LLM APIs or building AI-assisted workflows
Knowledge of structured-output validation and error-handling mechanisms
Experience with application security testing
Knowledge of DAST and SAST methodologies
Experience with tools such as OWASP ZAP, Nuclei, Semgrep, pytest
Experience in security test automation
Experience with PDF processing, OCR, or document extraction solutions
Experience with SQL databases
Experience with Maven, CI/CD pipelines, Docker, or cloud services
Interest in cybersecurity, vulnerability management, and security engineering
Technologies you’ll work with
Python and/orJava & Spring Boot
REST APIs
Pytest and automated testing frameworks
SQL databases and Docker
LLM APIs and AI-assisted workflows
Security tools such as OWASP ZAP, Nuclei, and Semgrep
OCR, document processing, and PDF analysis technologies
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 TeamThe 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 acertain 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.