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Senior Java API Engineer
  • Kraków
Senior Java API Engineer
Kraków, Kraków, Lesser Poland Voivodeship, Polska
ITDS Polska Sp. z o.o.
5. 2. 2026
Informacje o stanowisku

Senior Java API Engineer

Miejsce pracy: Kraków

Technologies we use

Expected

  • Java
  • Docker
  • Kubernetes
  • Kafka
  • Splunk
  • Grafana
  • Prometheus
  • Jaeger
  • Kiali
  • OpenTelemetry
  • SQL

Optional

  • Go
  • Rust
  • Linux

Operating system

  • Linux

About the project

As a Senior Java API Engineer, you will be working for our client, a leading financial institution, delivering State Architecture for payment processing. You will help introduce a lean, reusable payment processing engine that forms the backbone of next-generation payment capabilities. Leveraging existing software within an inner sourcing model focused on reuse and enhancement, you will contribute to rapidly delivering innovative financial products with high quality and efficiency.

Krakow-based opportunity with hybrid work model (up to 3 remote days per week).

Empower financial technology - shape the future of payment processing systems!

Your responsibilities

  • Deliver engineering expertise to develop and implement Architecture, producing world-class payment processing capabilities.
  • Write high-quality, robust code artifacts, ensuring quality standards are met and comprehensive test scripts are included.
  • Focus on delivering highly available, resilient software and service capabilities within the payment ecosystem.
  • Collaborate with the delivery team to design and develop new functionalities.
  • Support the modernization of the current payment estate, adopting cloud-based technology and best practices.
  • Set high standards for software delivery, leading by example.
  • Provide technical solutions and guidance for complex technical and business issues.
  • Maintain awareness of business and technology strategies, and recommend innovative technical solutions for competitive advantage.
  • Manage complex technical infrastructure to meet evolving business needs.
  • Partner with DevOps teams to automate infrastructure delivery, implement DevSecOps practices, and optimize CI/CD pipelines.
  • Conduct feasibility analyses, cost/benefit evaluations, and detailed specifications for large systems.
  • Design, code, test, debug, and document payment systems aligned with global standards.
  • Uplift architecture guidance based on best practices, ensuring compliance with controls and security standards.
  • Stay current with advancements in cyber security, data privacy, and relevant regulations.

Our requirements

  • 15+ years of applied experience as an API engineer, with at least 10 years in backend microservices application development.
  • Strong expertise in API designing and architectural artefacts such as gap analysis, data models, and low-level designs.
  • Extensive programming experience in Java, with knowledge of Go and Rust preferred.
  • Proven skills in JVM tuning, application troubleshooting, and performance optimization.
  • Deep knowledge of distributed system design, including microservices architecture with Spring Boot.
  • Hands-on experience with Docker, Kubernetes, service mesh, and Kafka, including cluster configuration and software development.
  • Proficiency in monitoring and observability tools such as Splunk, Grafana, Prometheus, Jaeger, Kiali, and OpenTelemetry.
  • Solid understanding of cloud platforms, networking (VPC), security, and DevOps practices.
  • Strong SQL coding skills and experience with distributed databases.
  • Experience working in financial institutions, especially in payments domain.
  • Ability to work independently, innovate, and lead technical initiatives.
  • Leadership skills with a passion to mentor and develop technologists.
  • Excellent communication skills in English, with the ability to negotiate and influence technical decisions.

Optional

  • Certifications in cloud, security, or related areas.
  • Knowledge of infrastructure components like Linux OS, network load-balancing, and storage solutions.

This is how we organize our work

This is how we work

  • agile
  • scrum

What we offer

  • Stable and long-term cooperation with very good conditions
  • Enhance your skills and develop your expertise in the financial industry
  • Work on the most strategic projects available in the market
  • Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years
  • Participate in Social Events, training, and work in an international environment
  • Access to attractive Medical Package
  • Access to Multisport Program
  • Access to Pluralsight
  • Flexible hours

Benefits

  • sharing the costs of sports activities
  • private medical care
  • flexible working time
  • fruits
  • integration events
  • corporate gym
  • saving & investment scheme
  • no dress code
  • coffee / tea
  • drinks
  • christmas gifts
  • birthday celebration
  • sharing the costs of a streaming platform subscription
  • access to +100 projects
  • access to Pluralsight

Recruitment stages

  • first online interview
  • second online interview

#GETREADY to meet with us!

ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people.

We would like to meet you. If you are interested please apply and attach your CV in English or Polish, including a statement that you agree to our processing and storing of your personal data.

ITDS’s Whistleblower Procedure

? You can report violations in accordance with ITDS’s Whistleblower Procedure available here: https://itds.pl/wp-content/uploads/2025/03/INFORMATION-ON-PROCEDURE-FOR-REPORTING-BREACHES-AND-PROTECTION-OF-WHISTLEBLOWERS-AT-ITDS-POLSKA.pdf

ITDS Polska Sp. z o.o.

ITDS supports financial service providers to take the next steps.

We identify what’s possible, every day. Opportunities in the areas of technology, organization, and digitization.

We see where banks, insurers, payment companies, or fintech can go and how they can get there.

That’s why we want to stimulate you to ramp up your ambition. Forget what you perceive as restraints and step towards the new reality.

ITDS in Poland - Pure player in new Technologies & Financial Industry

+300 IT implementation professionals

+20 clients in the Banking, Insurance, Payment & Fintech Industry

ITDS excels in digital strategy delivery and implementation of best-of-breed lending solutions. ITDS has delivered successful strategic projects throughout Europe since 1998. We combine the experience we’ve accumulated with in-depth knowledge of technologies, business processes, and EU legislation to unlock new business opportunities.

Informujemy, że administratorem danych jest ITDS z siedzibą w Warszawie, ul. Złota 59 (dalej jako "administrator"). Masz prawo do żądania dostępu do swoich danych osobowych, ich sprostowania, usunięcia lub ograniczenia przetwarzania, prawo do wniesienia sprzeciwu wobec przetwarzania, a także prawo do przenoszenia danych oraz wniesienia skargi do organu nadzorczego. Dane osobowe przetwarzane będą w celu realizacji procesu rekrutacji. Podanie danych w zakresie wynikającym z ustawy z dnia 26 czerwca 1974 r. Kodeks pracy jest obowiązkowe. W pozostałym zakresie podanie danych jest dobrowolne. Odmowa podania danych obowiązkowych może skutkować brakiem możliwości przeprowadzenia procesu rekrutacji. Administrator przetwarza dane obowiązkowe na podstawie ciążącego na nim obowiązku prawnego, zaś w zakresie danych dodatkowych podstawą przetwarzania jest zgoda. Dane osobowe będą przetwarzane do czasu zakończenia postępowania rekrutacyjnego i przez okres możliwości dochodzenia ewentualnych roszczeń, a w przypadku wyrażenia zgody na udział w przyszłych postępowaniach rekrutacyjnych - do czasu wycofania tej zgody. Zgoda na przetwarzanie danych osobowych może zostać wycofana w dowolnym momencie. Odbiorcą danych jest serwis Hello HR oraz inne podmioty, którym powierzyliśmy przetwarzanie danych w związku z rekrutacją.
Naruszenia można zgłaszać zgodnie z Procedurą zgłaszania nieprawidłowości ITDS dostępną tutaj:
https://itds.pl/wp-content/uploads/2025/03/INFORMATION-ON-PROCEDURE-FOR-REPORTING-BREACHES-AND-PROTECTION-OF-WHISTLEBLOWERS-AT-ITDS-POLSKA.pdf

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