company logo

Senior Front-End Developer

Sigma Software.com

Office

Warsaw, Masovian Voivodeship, Poland

Full Time

Company Description

Join a globally recognized company where innovation meets impact. Our team of seasoned professionals and a culture built on excellence, we deliver top-tier solutions that shape industries and drive meaningful results. Be part of a Сompetence Сenter where your expertise will be valued, your voice will be heard, and your career will be empowered.

Customer

It is an international technology company that specializes in developing high-load platforms for data processing and analytics. Its core product helps businesses manage large volumes of data, build models, and gain actionable insights. Operating globally, the company primarily serves clients in the marketing and advertising sectors, and focuses on modern technologies, microservices architecture, and cloud-based solutions. 

Job Description

  • Develop and maintain high-load web applications using a microservices architecture 
  • Work with large datasets by designing and implementing ingestion, processing, and analytics workflows 
  • Design and build REST APIs 
  • Use Front-end frameworks (React, Angular, etc.) for web development 
  • Optimize solutions for scalability, reliability, and high performance 
  • Collaborate with Data Analysts and Data Scientists to integrate algorithms and models into the product 
  • Ensure that data security and compliance standards are met across solutions

Qualifications

  • 5+ years of experience in software development with a focus on Front-end technologies  
  • 5 years of experience with React  
  • Experience building responsive, user-friendly web interfaces for multitier web applications  
  • Familiarity with integrating REST APIs into front-end applications  
  • Understanding of OOP principles, design patterns, algorithms, and data structures  
  • Familiarity with cloud platforms (AWS, Google Cloud, or Azure)  
  • Hands-on experience with Linux/Unix environments for development and debugging  
  • Experience interacting with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB, Cassandra) via APIs  
  • Ability to write clean, maintainable, and well-tested code with a focus on Front-end best practices  
  • Eagerness to learn and contribute to Front-end engineering best practices  
  • At least an Upper-Intermediate level of English

Senior Front-End Developer

Office

Warsaw, Masovian Voivodeship, Poland

Full Time

September 12, 2025

company logo

Sigma Software

sigmaswgroup