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Sigma Software Group

Senior Back End Developer (Fintech project)

Sigma Software Group
Poland · Full-time · Mid-Senior

We invite a highly skilled JavaScript expert with extensive experience in React and Node.js, who excels as a collaborative team member.

The role extends beyond coding, encompassing responsibilities such as handling feature aspects, specifications, technical design, development, testing, documentation, and maintenance.


Customer

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


Responsibilities

  • Design and implement large-scale software solutions and components using multiple technologies, with a primary focus on React and Node.js
  • Keep consistently high level of quality throughout all stages of the development
  • Communicate effectively to actively collaborate with the team and get context for complex tasks
  • Follow best engineering practices and company and client guidelines
  • Play supervisory, advisory, and coaching roles for less-experienced engineers on the team
  • Promote clean code and design patterns and principles


Requirements

  • Over 5 years of experience in Back-end software development
  • At least 3 years of experience with TypeScript
  • Over 3 years of experience working with Node.js, React, and Redux on large-scale applications
  • Strong experience in designing distributed and secure systems
  • 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
  • Experience working with a Cloud Provider (AWS, GCP, Azure, etc.)
  • Good knowledge of best testing practices
  • At least an Upper-Intermediate level of English


Would be a plus

  • Experience with modern JavaScript and ES6 libraries​Experience with AWS

Key Skills

Ranked by relevance

react javascript design patterns microservices graphql devops cloud aws gcp
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Posted
Mar 03, 2025
Type
Full-time
Level
Mid-Senior
Location
Poland

Industries

Software Development

Categories

Information Technology

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