Frontend Engineer at Calyptus

Job Description:

Latest job information from Calyptus for the position of Frontend Engineer. If the Frontend Engineer vacancy in Lisbon matches your qualifications, please submit your latest application or CV directly through the updated Jobkos job portal.

Please note that applying for a job may not always be easy, as new candidates must meet certain qualifications and requirements set by the company. We hope the career opportunity at Calyptus for the position of Frontend Engineer below matches your qualifications.

Want to put your job search on autopilot? Join our platform, complete a 6-minute AI screening interview, and get auto-applied to 100s of high-paying roles. Sign up now at https://app.calyptus.co/auth/candidate/sign-up and let the opportunities come to you. ____________________________________________________________ Core Responsibilities Act as a self-starter and take ownership as the first frontend engineer in Europe, setting the foundation for future growth. Design and develop responsive, high-performance user interfaces using React JS and related technologies. Integrate AI-powered personalization and recommendations into the frontend experience. Collaborate with backend engineers to optimize API design and performance, ensuring smooth and reliable interactions. Implement and maintain design systems and reusable component libraries that scale across the platform. Optimize frontend performance (rendering, loading, caching) for video-first discovery and booking flows. Ensure accessibility, responsiveness, and cross-device compatibility. Design and run experiments with Statsig to validate frontend flows, personalization strategies, and conversion improvements. Collaborate with product and growth teams to translate experiment results into scalable product features. Write and maintain unit and integration tests to ensure quality and reliability. Participate in code reviews, debugging, and documentation to maintain a clean, maintainable codebase. Stay up to date with frontend tools, frameworks, and best practices, bringing forward ideas for innovation and scale. Candidate Requirements Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field. 4–5 years of experience in frontend development using React JS and related technologies. Strong knowledge of HTML, CSS, JavaScript, and TypeScript, with the ability to write clean, efficient, and maintainable code. Familiarity with frontend libraries and frameworks such as Redux, Axios, and Material UI. Experience with unit and integration testing frameworks (e.g., Jest, React Testing Library, Enzyme). Understanding of responsive design, accessibility, and performance optimization principles. Familiarity with design tools like Figma or Sketch, and the ability to translate designs into high-quality implementations. Strong problem-solving and analytical skills, with the ability to work independently and in a team environment. Excitement to work in an AI-first company and openness to experimentation frameworks (Statsig, Optimizely, GrowthBook, or similar). A self-starter mindset, comfortable being the first frontend engineer in Europe, and eager to set best practices for the team. ____________________________________________________________ Want to put your job search on autopilot? Join our platform, complete a 6-minute AI screening interview, and get auto-applied to 100s of high-paying roles. Sign up now at https://app.calyptus.co/auth/candidate/sign-up and let the opportunities come to you.

Job Info:

• Company: Calyptus
• Position: Frontend Engineer
• Work Location: Lisbon
• Country: PT

How to Submit an Application:

After reading and understanding the criteria and minimum qualification requirements explained in the job information Frontend Engineer at the office Lisbon above, immediately complete the job application files such as a job application letter, CV, photocopy of diploma, transcript, and other supplements as explained above. Submit via the Next Page link below.

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