Senior Front-End Developer

SigmaSoftware2

Kyiv, Kyiv city, Ukraine Remote permanent

Posted: March 2, 2026

Required Skills

Job Description

Are you passionate about creating seamless, high-performance web applications? We are looking for a Senior Front-End Developer to join our team and work on an exciting e-commerce project in the pet industry. This role offers the opportunity to shape user experiences for a platform with a broad audience and strong online presence.

You will be part of a collaborative, agile-driven environment at Sigma Software, where innovation and quality go hand in hand.

Why join us? You’ll be working on a high-impact project where your ideas and technical decisions will directly influence product success and user experience.

CUSTOMER

Our Customer is a leading online marketplace specializing in pet products, recognized for its extensive catalog and strong digital presence. The company caters to a wide audience of pet owners, offering food, accessories, and healthcare products. With a focus on quality and customer satisfaction, it has become a trusted destination for pet lovers worldwide.

• Design, develop, and maintain scalable front-end applications using ReactJS and GraphQL
• Collaborate with UX/UI designers and backend developers to deliver high-quality features
• Implement responsive, user-friendly interfaces across devices and browsers
• Ensure application performance, security, and scalability
• Conduct code reviews and share best practices with the team
• Debug and resolve issues efficiently
• Contribute to continuous improvement of development processes and tools

• 5+ years of professional front-end development experience using ReactJS
• Strong proficiency in JavaScript (ES6+), TypeScript, HTML5, CSS3
• Expert knowledge of ReactJS, React Hooks, Context API, and Redux (Redux-Saga optional)
• Experience with Next.js and GraphQL (Apollo Client or similar)
• Experience with RESTful APIs and third-party integrations
• Familiarity with performance optimization and debugging techniques
• Knowledge of component-based architecture and state management patterns
• Upper-Intermediate level of spoken and written English

WILL BE A PLUS

• Experience with Playwright or other automated testing frameworks
• Familiarity with CI/CD pipelines and DevOps practices
• Experience with Google Cloud Platform

PERSONAL PROFILE

• Proactive and detail-oriented
• Strong communication skills
• Team player with collaborative mindset
• Problem-solving attitude
• Adaptable to changing requirements and priorities

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