Senior Java Backend Engineer (core java, trading systems) @ Vistulo (for a major N. American bank)

Vistulo (for a major N. American bank); Katowice; Remote; PLN 254,000 - 364,000; Full time

Job summary

A leading financial institution is seeking experienced Java engineers to join their core team, developing high-performance trading systems. The role offers fully remote work for those in Poland, with opportunities for professional growth and competitive compensation. Candidates should have at least 6 years of experience in backend development, particularly with core Java and distributed systems.

Benefits

Competitive compensation

Flexibility & remote work

Long-term commitment and professional growth

Qualifications

• Strong understanding of programming concepts, including algorithms, complexity, and data structures.
• Experience building distributed service-based applications based on message queues.
• Strong analytical and problem-solving skills.

Responsibilities

• Design and implement robust software solutions for the bank’s trading systems using core Java (17 and 21).
• Collaborate with operations teams on building new features and improving existing functionality.

Skills

Java

Core Java

JUnit

Algorithms

Data structures

Git

Spring Boot

Kafka

AWS tools (Jira, Bitbucket, Jenkins)

Education

A computer science degree from a top Polish school

Job description

Join the Java Engineering Team at a top N. American Bank

Are you a skilled Java engineer who thrives on building high-performance systems? Do you love working with smart people on meaningful technology? Want to work on large systems that power real‑time trading across global markets? If so, read on.

The Role at a Glance

• Fully remote for a top N. American bank (for residents of Poland only)
• Openings on multiple teams in the capital markets division (prime brokerage, platform team)
• Part of the core team – this is not a legacy support role or an outsourced B team

We’re hiring experienced backend engineers (6+ years) to join a major N. American bank – directly supporting the development of financial trading systems. This is not a legacy maintenance or support role – you’ll be part of the core product team, building highly‑performant, low‑latency systems used across the firm.

Why Join Us?

• Work on a large‑scale, low‑latency trading system processing millions of daily transactions.
• Modern Java (17 & 21) – no legacy: the system is actively developed and maintained by its original engineers.
• Collaborate with a world‑class team of developers across North America and Europe.
• Enjoy a long‑term, fully remote role with flexible hours after onboarding.
• Competitive compensation and long‑term stability that only a bank can offer.

What We Offer

• Work that matters in the financial domain: contribute to a trading system at an established financial institution, processing millions of transactions daily.
• Professional growth: collaborate with smart, highly capable developers in a supportive and challenging environment.
• Direct collaboration: work directly with the client team in North America and in Poland.
• Long‑term commitment: this is not a fixed‑scope or fixed‑term outsourcing role; we value people who want to grow and contribute long‑term.
• Flexibility & remote work: fully remote position based in Poland with increasing schedule flexibility post‑onboarding.
• Competitive compensation: above‑average pay and ample time‑off options.

The Recruitment Process

• Submit your CV.
• Answer a few written questions and a short programming exercise which you can do at your own pace.
• Participate in a three‑stage interview process:
  • Discuss your experience and skills.
  • Solve verbal algorithm problems (focus on clarity and understanding).
  • Tackle live coding challenges (no trick questions).

Successful candidates will need to pass a standard background check.

Responsibilities

• Design and implement robust software solutions for the bank’s trading systems using core Java (17 and 21).
• Understand, develop, and improve subsystems used by other teams in the trading platform.
• Create thorough test cases to ensure software stability and reliability.
• Collaborate with operations teams on building new features and improving existing functionality.
• Support production issues, including root‑cause analysis and diagnosis.

Requirements

• Strong understanding of programming concepts, including algorithms, complexity, and data structures.
• Knowledge of the internals of Java data structures.
• Experience building distributed service‑based applications based on message queues.
• Strong analytical and problem‑solving skills.
• Open mind, curiosity, and a strong desire to learn new technologies and business domains.
• Ability to clearly explain non‑trivial systems and algorithms.
• Ability to follow and understand technical conversations.
• Know when and how to ask questions that speed up learning.
• Ability to align your working schedule to US Eastern business hours during onboarding.
• Java, Core Java, JUnit, Algorithms, Data structures, Git, Spring Boot, Kafka, AWS tools (Jira, Bitbucket, Jenkins).

Nice to Have

• Experience with financial markets and trading systems.
• Knowledge of AWS systems.
• Experience with Spring Boot.
• Experience working remotely with North American firms.
• Strong collaboration and teamwork skills.
• Familiarity with distributed systems or concurrent programming.
• A computer science degree from a top Polish school.

Only open to residents of Poland. Polish citizens, as well as legal residents with permission to work in Poland are welcome.

Katowice | Vistulo (for a major N. American bank)