Lingaro
Frontend Developer - Freelancer
Freelance frontend developer at Lingaro (Poland) designing, building, and maintaining React/Next.js applications in an agile team — writing reusable code, debugging performance issues, and collaborating with BA, QA, and offshore developers. Core stack: JavaScript/TypeScript, React/Next.js, Redux, and modern CSS frameworks.
- Compensation
- Not disclosed
- Location
- Poland
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 5+ years
- Category
- Frontend
- Posted
Skills
Must have
- 5+ years of professional experience
- Excellent communication skills
- Great ownership of assigned tasks; self-driven and proactive approach
- Strong experience in JavaScript and TypeScript
- Thorough understanding of React/Next.js core principles, React Router, hooks, Redux (or similar) workflows, web performance and security
- Developing and maintaining modern distributed microservices
- Development in cloud environments (Google Cloud Platform preferred)
- Building, testing, and troubleshooting high-volume web services using REST & JSON
- Solid foundation in data structures, algorithms and their implementation in JS
- Expertise with semantic HTML
- Proficiency in CSS, including Tailwind, Styled Components, CSS Modules, and SASS
- Expertise with browser-based debugging tools
- Experience with responsive and adaptive design
- Experience with testing (Unit Testing, react-testing-library, E2E)
- Keen understanding of web application development process and standard methodologies
- Experience using AI-assisted development tools such as Claude, GitHub Copilot, and similar
- Ability to apply AI tools effectively for coding, debugging, testing, refactoring, and documentation while maintaining code quality and security
- English at B2+ level
Nice to have
- Previous experience in front-end development with Docker
- Experience with Headless CMS (preferably Contentful)
- Experience with NodeJS
- Knowledge of GraphQL
Full description
Growth through diversity, equity, and inclusion. As an ethical business, we do what is right — including ensuring equal opportunities and fostering a safe, respectful workplace for each of us. We believe diversity fuels both personal and business growth. We're committed to building an inclusive community where all our people thrive regardless of their backgrounds, identities, or other personal characteristics.
Tasks
- Design, build and maintain efficient, reusable and reliable code.
- Build React/Next.js based applications.
- Ensure the best possible performance, quality, and responsiveness of applications.
- Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues.
- Help maintain code quality.
- Participate in the agile team scrums and effectively communicate to the team the status, roadblocks, and timelines for the task at hand.
- Must be able to collaborate with BA, QA, developers and offshore developers to plan, design, develop, test, and maintain mobile web and desktop-based applications requested by the stakeholders.
- Share knowledge with the team during workshops.
Requirements
What We're Looking For:
- 5+ years of professional experience.
- Excellent communication skills.
- Great ownership of assigned tasks. Self-driven and proactive approach.
- Strong experience in JavaScript and TypeScript.
- Thorough understanding of React/Next.js core principles along with React router, hooks, Redux (or the like) workflows, Web performance and security.
- Developing and maintaining modern distributed micro services.
- Development in Cloud environments (Google Cloud Platform preferred).
- Building, testing, and troubleshooting high volume web services using API Protocols and Data Formats (REST & JSON).
- Solid foundation in data structures, algorithms and its implementation in JS.
- Expertise with semantic HTML.
- Proficiency in CSS, including Tailwind, Styled Components, CSS Modules, and SASS.
- Expertise browser-based debugging tools.
- Experience with responsive and adaptive design.
- experience with Testing (Unit Testing, react-testing-library, E2E).
- Keen understanding of web application development process and standard methodologies.
- Experience using AI-assisted development tools to improve productivity and code quality, such as Claude, GitHub Copilot, and similar tools.