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Strong Middle Senior Full Stack Developer (TypeScript React)

Sigma Software


Job Location:

Warsaw - Poland

Monthly Salary: Not provided by the employer
Posted: 8 September 2026 (14 hours ago)
Application Deadline: 6 December 2026
Vacancies: 1 Vacancy

Job Summary

  • Design develop and maintain scalable Full Stack applications using JavaScript TypeScript NestJS and React
  • Implement and support complex business logic related to digital advertising campaign management
  • Participate in technical discussions architecture decisions and solution design activities
  • Collaborate closely with developers Architects QA engineers and Project Managers
  • Improve application performance scalability reliability and maintainability
  • Develop clean maintainable and well-tested code following software engineering best practices
  • Identify technical challenges proactively and drive solutions independently
  • Contribute to continuous improvements in development processes and technical standards

Qualifications :

  • 4-5 years of commercial software development experience with JavaScript and TypeScript with a primary focus on back-end development
  • Strong Back-end development experience with NestJS
  • Solid Front-end development experience with ReactJS
  • Hands-on experience with AWS cloud services
  • Good understanding of scalable system architecture and software engineering best practices
  • Experience working with enterprise-level or high-load applications
  • Strong problem-solving and analytical skills
  • Ability to work independently and take ownership of technical solutions
  • Good communication and collaboration skills
  • Upper-Intermediate or higher English level

WILL BE A PLUS

  • AI-native development experience
  • Familiarity with AI-powered development tools such as Claude and Codex
  • Experience with Jenkins
  • Experience with Terraform
  • Experience working with complex or enterprise platforms 

Additional Information :

PERSONAL PROFILE

  • Proactive and self-driven mindset
  • Strong ownership attitude
  • Team-oriented and collaborative approach
  • Ability to work effectively in a fast-paced engineering environment
  • Strong attention to code quality and technical excellence

Remote Work :

No


Employment Type :

Full-time


About Company

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At Sigma Software, we are involved with the client’s team to contribute to the design and development of a technical solution for their tokenized domain reservation platform. We started by assigning a software architect to design the smart contracts and integrate blockchain into the s ... View more

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