Sigma Software Group

Senior Front-End Developer

Sigma Software Group

full-time

Posted on:

Location Type: Remote

Location: Ukraine

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Job Level

Senior

Tech Stack

ApolloCloudGoogle Cloud PlatformGraphQLJavaScriptNext.jsReactReduxTypeScript

About the role

  • 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

Requirements

  • 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
Benefits
  • Flexible work arrangements
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
ReactJSGraphQLJavaScriptTypeScriptHTML5CSS3Next.jsRESTful APIsReduxPerformance optimization
Soft Skills
CollaborationCode reviewProblem-solvingContinuous improvementCommunication