Full Stack Engineer (Java & React)

Capco

Poland - Warsaw · Poland · Hybrid · Posted Oct 19, 2026

At a glance

Workplace
Hybrid
Location
Poland - Warsaw · Poland

About the role

  • We are seeking React / Java Full Stack Engineer to join our Global Asset Servicing Platform team.
  • This is a hands-on engineering role where you will design, build, and test features end-to-end – with full ownership of code and quality.

Responsibilities

  • Design, develop, and maintain features using Java and React.
  • Build responsive and modern frontend applications using ReactJS
  • Develop and integrate APIs and web services.
  • Write clean, well-structured unit tests (JUnit or equivalent) alongside your code.
  • Contribute to and maintain our automated test framework using Ruby and Cucumber
  • Write automated tests for features developed by other engineers, ensuring high-quality outcomes and reducing development bias.
  • Apply performance and scalability considerations; use tools such as JMeter for load/performance testing where required.
  • Ensure instrumentation, configuration, and logging are embedded in code to support ongoing monitoring and support.
  • Analyse and debug issues using logs; propose and implement fixes.
  • Collaborate in Agile ceremonies, helping the squad plan effectively and commit to clear sprint goals.

Requirements

  • Proficiency in Java (with strong JUnit testing experience)
  • Proficiency in React (with associated unit testing frameworks)
  • Familiarity with automation frameworks & languages including Ruby scripting for step definitions and Cucumber for end-to-end testing
  • Strong understanding of multi-threading, parallel processing, and real-time messaging
  • Strong understanding of test-first design, CI/CD practices
  • Basic understanding of cloud services
  • Experience using AI-assisted engineering tools
  • Strong analytical and debugging abilities

Preferred qualifications

  • Ability to use JMeter or similar tools for performance testing
  • Knowledge of corporate actions lifecycle preferred

Workplace

  • B2B cooperation in a hybrid model
  • Option to provide services from the Warsaw office to the extent agreed based on project needs

Skills

  • Java
  • React
  • JUnit
  • Ruby
  • Cucumber
  • Oracle
  • Postgres
  • JMeter
  • GitHub Copilot
  • ChatGPT
  • CI/CD

Capco

Full Stack Engineer (Java & React)

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