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Full Stack Java ISO Team

Warsaw, Poland · Contract · Hybrid

Strategic Staffing Solutions International’s client is a leading global investment bank and financial services firm, known for working with top companies, governments, and institutions. With a strong worldwide presence, they focus on investment banking, markets, asset management, and consumer finance.

They are seeking an experienced and independent Software Engineer to join their Engineering teams (Payments / Electronic Trading) on a 6–12 month hybrid contract in Warsaw (4 days office / 1 day remote).

Key Responsibilities

  • Resolve production issues in high-performance trading or payments systems
  • Build automation tools and improve operational efficiency
  • Develop and enhance Java/Python-based microservices and APIs
  • Work with SWIFT / ISO20022 messaging or trading platforms
  • Support CI/CD, releases, and monitoring improvements
  • Collaborate with global engineering, infrastructure, and business teams

Requirements & Qualifications

  • Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
  • 4+ years of software engineering experience
  • Strong skills in Java (11/17/21), Spring, Spring Boot, Hibernate, DB2
  • Experience with Apache Kafka and event-driven architectures
  • Knowledge of MongoDB and data modelling
  • Experience with MavenDocker, and RESTful APIs
  • Solid understanding of microservices / distributed systems
  • Familiarity with Git and CI/CD pipelines (GitLab CI preferred)
  • Linux and production support experience

Preferred

  • IBM MQ / JMS (queue managers, channels)
  • Infrastructure as Code (IaC)
  • ISO 20022 / SWIFT / CBPR+ / FIN
  • Python scripting
  • Angular
  • Experience in financial services / payments / banking tech
  • Strong analytical and problem-solving skills
  • Ability to collaborate effectively in global teams
  • Commercial mindset with strong focus on code quality
  • Strong communication skills, ownership, and proactive attitude

What we offer

  • Work in a top-tier global investment banking environment
  • Hybrid working model (Warsaw)
  • Exposure to mission-critical financial systems
  • Contract until 31-Dec-26 contract, with potential extension
  • Salary - FTE: up to 24,200PLN gross / B2B: up to 200PLN p/h
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