Senior React/Node.js Developer (FinTech Project)
Sigma Software GroupWarsaw, Masovian Voivodeship, Poland
Posted January 29, 2026
Full Time
About the Company
Sigma Software Group is a leading IT consultancy with over two decades of experience, offering comprehensive solutions to businesses across various sectors. With a team of over 2,100 professionals in 40 offices worldwide, they specialize in IT consulting, software development, web development, and AI solutions, among other services. Their commitment to innovation is evident through initiatives like Sigma Software Labs and collaborations with venture capital funds, making them a trusted partner for cutting-edge product development.
Job Description
Our client is a rapidly expanding FinTech company that requires a Senior React/Node.js Developer to design and implement large-scale software solutions. The ideal candidate should have over 5 years of experience in Back-end software development, at least 3 years of experience with TypeScript, and strong experience in designing distributed and secure systems.
Requirements
- Over 5 years of experience in Back-end software development
- At least 3 years of experience with TypeScript
- Over 4 years of experience working with Node.js
- Strong experience in designing distributed and secure systems
- Good Front-end development skills
- Good understanding of microservices architectures
- Experience in designing, building, and maintaining APIs
- Experience in building and consuming REST and/or GraphQL APIs
- Familiarity with DevOps practices
- Strong experience working with AWS
- Good knowledge of testing best practices
- At least an Upper-Intermediate level of English