Frontend Engineer Mafra

Frontend Engineer
Mafra
Mafra, Lisboa, Portugal

Job Title: Frontend Engineer
Location: Lisbon, Portugal

Work Regime: Full-time & Hybrid

• 1 time per week for the 1st month;
  
• 1-2 days a month after the 1st month.
  

• Design, develop, and maintain
  - quality, scalable web applications that align with both user expectations and business needs;
  
• Collaborate with
  - functional teams to define product requirements, user stories, and acceptance criteria;
  
• Write clean, maintainable, and efficient code using best practices, modern standards, and scalable architecture;
  
• Lead and participate in code reviews, offering actionable feedback and mentoring junior developers to uphold code quality;
  
• Optimize application performance, reliability, and security through thorough profiling, debugging, and testing;
  
• Contribute to technical design and architecture discussions, producing specifications and documentation as needed;
  
• Stay current with industry trends, emerging technologies, and frontend best practices, sharing knowledge with the wider team.
  
  
  
  

• Bachelor's or Master’s degree in Computer Science, or equivalent professional experience;
  
• 5+ years of professional experience in modern web development, with a focus on React and Type
  Script;
  
• 5+ years of experience with React
  JS, and experience with Next
  JS, CSS, Vitest/Jest and Storybook;
  
• Strong understanding of Java
  Script (ES2015+), HTML5, and CSS3, as well as modern web development workflows;
  
• Experience working with RESTful APIs and integrating frontend applications with backend services;
  
• Solid understanding of state management concepts and
  - on experience with tools such as Jotai, Zustand, or Redux;
  
• Familiarity with automated testing, including React Testing Library, Vitest, and Playwright;
  
• Experience with Next. js and CSS Modules for styling and SSR/SSG;
  
• Comfortable with CI/CD pipelines and Agile methodologies;
  
• Strong knowledge of software design patterns, frontend architectural principles, and
  - centered design;
  
• Excellent
  - solving, communication, and collaboration skills;
  
• Languages: fluent English.
  
  
  

• Exposure to accessibility standards (WCAG) and inclusive design practices;
  
• Familiarity with performance audits and tools such as Lighthouse, Web Vitals, or Chrome Dev
  Tools;
  
• A strong “own it” mentality – ability to take ownership of a task from inception to completion;
  
• Contributions to open source or participation in developer communities.