Senior Expert Engineer

Euroclear; Kraków; On-site; PLN 240,000 - 360,000; Full time

Job summary

Euroclear Kraków seeks a Senior Expert Engineer to design, implement, and improve scalable financial IT solutions. You’ll mentor peers, lead cross-team initiatives, and shape product functionality while ensuring quality and reliability.

You’ll work on modern backend systems, Java services, and event-driven architectures in a Linux environment with Docker, Kubernetes, and Kafka. Strong English skills and autonomous collaboration are essential.

Qualifications

• Strong Java and OO design skills are required.
• Experience building Java services and microservices.
• Hands-on Docker, Kubernetes and containerized services.
• Spring Boot and modern backend development experience.
• Experience developing on Unix/Linux platforms.
• Hands-on Kafka and event-driven architectures.
• Proficiency in performance tuning and reliability.
• Knowledge of BDD and TDD practices.
• Collaborative, self-driven, and able to work autonomously.
• Strong English communication both written and spoken.
• Solid knowledge of Git workflows, logging, monitoring, and secure coding.

Responsibilities

• Drive design, architecture, and implementation of scalable solutions across teams.
• Mentor engineers and support complex problem solving.
• Lead ideation workshops to improve product functionality and UX.
• Define, estimate, and validate multi-team requirements.
• Anticipate dependencies and improve planning for quality delivery.
• Maintain production stability through durable fixes and proactive actions.
• Promote coding standards and best practices.
• Support continuous improvement of code quality and engineering practices.

Skills

Java

OO Design

Docker

Kubernetes

Spring Boot

Unix/Linux

Kafka

Performance

BDD/TDD

Git workflows

English

Secure coding

Mainframe exposure

Oracle DB

SQL

Tools

Oracle DB

SQL

Job description

Job Description

Senior Expert Engineer

Join our Group Business Solutions (GBS) division, where we design and sustain IT solutions for financial market securities. Be part of a dynamic, collaborative team in a fast-evolving environment, shaping the future of financial technology.

Ready to make an impact?

We’re seeking a skilled and proactive Senior Expert Engineer to strengthen our solutions and drive meaningful improvements. You’ll collaborate across teams, provide technical guidance, and lead key initiatives in an innovative, growth-oriented environment aligned with business needs.

Your Day-to-day Mission

• Drive the design, architecture, and implementation of scalable solutions, owning complex features and collaborating across teams to deliver robust, scalable systems.
• Mentor engineers, supporting complex problem-solving and team growth.
• Lead ideation workshops, shaping high impact ideas to improve product functionality and user experience.
• Drive definition, estimation, and validation of complex multi-team requirements.
• Anticipate dependencies, improve planning accuracy, and ensure predictable, high-quality delivery through strong technical judgment and collaboration.
• Maintain production stability by leading investigations, delivering durable fixes, and proactively resolving systemic issues.
• Promote and refine coding standards and best practices aligned with system requirements and business processes.
• Support continuous improvement initiatives to enhance code quality and engineering effectiveness.

What you need to have to succeed in this role:

• Strong expertise in Java and object-oriented design
• Proven experience building Java services and microservices
• Hands‑on experience with Docker, Kubernetes, and containerized services
• Strong knowledge of Spring Boot and modern backend development
• Experience developing and supporting applications on Unix or Linux
• Hands‑on experience with Kafka and event‑driven architecture
• Experience with performance tuning and application reliability
• Good understanding of BDD and TDD practices
• Collaborative mindset with openness to peer review and feedback
• Self‑driven, reliable, and comfortable working autonomously
• Strong command of English, both spoken and written.
• Solid command of advanced Git workflows, testing and quality standards, ability to independently diagnose complex issues via logs/monitoring, and proactively apply secure coding and dependency best practices

What Makes You Stand Out

• Expertise in Oracle data modelling and database design
• Exposure to PL1 and IBM Mainframe environments
• Demonstrated leadership and interpersonal capabilities, autonomy and impact mindset.

We welcome applicants from all backgrounds and experiences.