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Senior Frontend Engineer

Senior Frontend Engineer

BraintrustMadrid, Madrid, SPAIN
Hace 18 días
Descripción del trabajo

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Job Description

We are looking for a Lead / Senior Frontend Software Engineer to join our cross-functional product team. You will play a pivotal role in designing, developing, and optimizing user-facing applications that are performant, scalable, and intuitive. You’ll work closely with product managers, designers, and backend engineers to bring seamless experiences to life.

Key Responsibilities

Architect, develop, and maintain advanced frontend features using modern frameworks, primarily React.

Build modular, reusable components and libraries to accelerate development across teams.

Translate UX / UI design wireframes into high-quality, responsive web applications.

Optimize applications for maximum speed, accessibility, and scalability.

Ensure code quality through code reviews, automated testing, and adherence to best practices.

Mentor junior engineers and support the frontend engineering culture.

Collaborate with cross-functional teams (design, product, backend, and data) to deliver well-integrated solutions.

Stay current with industry trends and emerging technologies.

Requirements

5+ years of professional experience building and maintaining modern frontend applications.

Hands-on experience designing and implementing Micro-Frontend architectures, including communication and integration between independent modules.

Deep understanding of HTML5, CSS3, responsive design principles, and accessibility (WCAG).

Experience with CSS-in-JS solutions, preprocessors like Sass, or utility-first frameworks like Tailwind CSS.

Experience working with RESTful and / or GraphQL APIs.

Proficient with version control systems such as Git (GitLab, GitHub).

Familiarity with Agile development methodologies, CI / CD pipelines, and automated testing (e.g., Jest, Testing Library, Cypress).

Excellent communication skills, a collaborative mindset, and a strong sense of ownership.

Bonus Qualifications

Experience in full-stack development, including SSR (e.g., Next.js) or backend Node.js services.

Exposure to design systems and component libraries (e.g., Storybook).

Understanding of UX research or design thinking methodologies.

Interest or experience in Conversational UI / Voice interfaces.

Experience in performance monitoring and web analytics.

Seniority level

Seniority level Mid-Senior level

Employment type

Employment type Full-time

Job function

Job function Engineering and Information Technology

Industries Technology, Information and Internet

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Senior Frontend Engineer • Madrid, Madrid, SPAIN