We’re seeking a proficient JavaScript specialist with expertise in React/Node.js who thrives as a team collaborator. The role goes beyond coding, encompassing responsibilities across feature development, specifications, technical design, testing, documentation, and maintenance.


Our client has rapidly become one of Europe’s most swiftly expanding fintech companies. They manage all aspects of financial operations, from generating virtual cards to facilitating wire transfers and maintaining customer account balances. Ass a payment institution, our client provides a platform that integrates financial services into its product, encompassing features like account management, card payments, bank transfers, and additional services.


  • Design and implement large-scale software solutions and components using multiple technologies (React and Node.js are the main ones)
  • Do everything needed to keep a high level of quality
  • Be a great communicator to be able to actively collaborate and get context for complex tasks
  • Follow best engineering practices and company/client guidelines
  • Play supervisory, advisory, and coaching roles for less-senior engineers in the team
  • Promote clean code and design patterns/principles


  • 4+ years of software development experience
  • Strong experience in designing distributed and secure systems
  • Strong experience with NodeJS/React/Redux on large-scale applications
  • Good knowledge of micro-services architectures
  • Experience designing, building, and maintaining APIs
  • Experience in building and consuming REST and/or GraphQL APIs
  • Comfortable with DevOps practices
  • Experience working within a Cloud Provider (AWS, GCP, Azure, etc.)
  • Good knowledge testing best practices
  • At least an Upper-Intermediate level of English


  • Modern JavaScript/ES6 libraries
  • Experience working with TypeScript
  • Experience with AWS

Sigma Software is a multinational company with over 21 years of experience providing our customers with best-in-class solutions. We are an IT consulting and software product company with development offices in Sweden, the USA, Canada, Ukraine, Latin America, Poland, Portugal, Hungary, Bulgaria, and the Czech Republic. 

All open vacancies are available both remotely and in the offices.

We deliver the smartest solutions to our customers in the areas of government, telecommunications, advertising, automotive, gaming, and others. We are a global player with more than 2000 specialists working from 40 offices in 19 countries. 

Taking high demand for quality, minimal hierarchy, freedom of decision-making, attention to every opinion, flexibility, and dedication to every project and every customer make us different.

Today, Sigma Software is a whole ecosystem that includes its own business incubator, educational platform, business association of companies, its own product line, and patented innovative solutions.