Senior Front-End Developer

SigmaSoftware2

Warsaw, Masovian Voivodeship, Poland Remote permanent

Posted: March 30, 2026

Required Skills

Job 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.

• 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

• 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

PERSONAL PROFILE

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

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