Senior Front-End Developer

Posted 2 Days Ago
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Hiring Remotely in Warsaw, Warszawa, Masovian, POL
In-Office or Remote
Senior level
Software
The Role
The Senior Front-End Developer will build responsive UIs using React, integrate backend data, optimize performance, and ensure code quality while collaborating with teams.
Summary Generated by Built In
Company Description

We are looking for a Senior Front-end Engineer to join one of our talented teams and help us build outstanding products for our clients. This is a great opportunity to work on innovative solutions that shape industries and deliver meaningful impact.

At Sigma Software, we combine technical excellence with a culture that values your expertise, encourages your ideas, and supports your career growth. You will collaborate with seasoned professionals in an environment where innovation meets quality.

If you are passionate about creating exceptional user experiences and want to work on impactful global projects, apply now and join us!

CUSTOMER

Our client is a global content and information company shaping the future of media and data. With a century-long legacy and a strong focus on innovation, the team builds trusted experiences and tools that inform, inspire, and empower millions of people worldwide. They are recognized for delivering impactful solutions across diverse platforms, serving millions of users daily, and setting industry standards for quality and reliability.

Job Description

  • Build responsive, user-friendly UI using React
  • Develop charts and interactive data visualizations based on existing datasets
  • Integrate backend data into frontend applications via REST/GraphQL APIs
  • Collaborate closely with data engineers to ensure seamless data integration
  • Optimize application performance, scalability, and reliability
  • Implement security best practices, CI/CD workflows, automated testing, and code quality standards
  • Work with product and design teams to translate business requirements into technical solutions
  • Take ownership of features from ideation to deployment and monitoring in production
  • Stay up to date with emerging technologies and contribute to technical decision-making within the team

Qualifications

  • 5+ years of professional experience with JavaScript, including modern frameworks and tools
  • Strong experience with React for designing maintainable, scalable UI systems
  • Experience working with APIs (REST/GraphQL)
  • Basic understanding of backend concepts (e.g., Node.js)
  • Strong knowledge of frontend fundamentals (HTML, CSS)
  • Upper-Intermediate level of spoken and written English

WILL BE A PLUS:

  • Experience with Model Context Protocol (MCP)
  • Familiarity with workflow automation tools such as n8n

Additional Information

PERSONAL PROFILE

  • Strong problem-solving skills and attention to detail
  • Ability to work independently
  • Excellent communication and collaboration skills

Top Skills

CSS
GraphQL
HTML
JavaScript
Node.js
React
Rest
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The Company
New York, New York
1,516 Employees

What We Do

Sigma Software Group, an award-winning and trusted IT partner, has been serving customers for over 21 years, providing comprehensive IT solutions to various businesses, ranging from startups to established software product houses. As one of Europe's substantial IT consultancies, it brings together a dedicated workforce of over 2,100 professionals in 40 offices across 19 countries. With a diverse client base, including more than 300 enterprises, including Fortune 500 stalwarts, Sigma Software Group is a preferred choice for developing solutions that help businesses create cutting-edge products while meeting their unique needs. Sigma Software Group operates as a dynamic ecosystem of tech companies, offering 25 ready-to-implement innovative products and 40+ value-added services. Furthermore, Sigma Software Group is committed to fostering innovation through initiatives such as the Sigma Software Labs business incubator, Sigma Software University, the SID Venture Partners VC Fund, UA Tech Network, Techosystem, the European Business Association, and other collaborative efforts. Since 2015, Sigma Software Group has consistently earned recognition on the IAOP's prestigious World's Top 100 Outsourcing list. The company's accomplishments have also been acknowledged by prominent global media outlets such as Forbes, CNBC, The Times, and Reuters

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