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Senior Software Engineer (React)

YOUR TASKS 

  • Developing and maintaining web applications using React or other Frameworks  

  • Collaborating with cross-functional teams to define, design, and ship new features 

  • Ensuring technical feasibility 

  • Writing clean, maintainable, and efficient code  

  • Participating in code reviews and providing constructive feedback  

  • Troubleshooting and debugging issues to improve performance and reliability 

YOUR PROFILE: 

  • Minimum 5 years of expeirence with React and JavaScript
  • Good knowledge of codecode versioning systems (i.e. GIT), HTML5, CSS3/SASS
  • Experience in writing unit and integration tests, as well as debugging and optimizing applications 
  • Good knowledge in integrating apps with external services and APIs, handling data formats like JSON. 
  • Experience working with microservices and cloud (AWS / Azure / GCP)
  • Fluent English (B2+) 
 
Nice to have: 
  • Experience with backend: NestJS 11, Node.js, Jest, RxJS, Lodash
  • Knowledge of state management libraries: NgRx, Akita
  • Experience with CI/CD and DevOps practices
  • Knowlesge of testing tools (Selenium, Proctractor) and SonarQube
  • Experience with WASM and Open Policy Agent (OPA) 

GET TO KNOW US 

Capgemini is committed to diversity and inclusion, ensuring fairness in all employment practices. We evaluate individuals based on qualifications and performance, not personal characteristics, striving to create a workplace where everyone can succeed and feel valued. 

Do you want to get to know us better? Check our Instagram — @capgeminipl or visit our Facebook profile — Capgemini Polska. You can also find us on TikTok! — @capgeminipl. 

ABOUT CAPGEMINI 

Capgemini is a global leader in partnering with companies to transform and manage their business by harnessing the power of technology. The Group is guided every day by its purpose of unleashing human energy through technology for an inclusive and sustainable future. It is a responsible and diverse organization of over 360,000 team members globally in more than 50 countries. With its strong 55-year heritage and deep industry expertise, Capgemini is trusted by its clients to address the entire breadth of their business needs, from strategy and design to operations, fueled by the fast evolving and innovative world of cloud, data, AI, connectivity, software, digital engineering and platforms. 

Apply now! 
Ref. code:  466242
Posted on:  28 Apr 2026
Experience Level:  Experienced Professionals
Contract Type:  Permanent
Location: 

Poznań, PL Warszawa, PL Kraków, PL

Brand:  Capgemini
Professional Community:  Software Engineering

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