Senior Frontend Developer Spain

Holafly; España; Presencial; EUR 45.000 - 65.000; Jornada completa

Descripción de la vacante

A fast-growing tech startup in Spain is searching for a Senior Frontend Developer. This remote role requires a minimum of 5 years experience in frontend development, particularly with HTML, CSS, JavaScript, and React. The ideal candidate will thrive in a team environment, have a strong focus on best practices, and be fluent in both Spanish and English. This position offers an opportunity to contribute to significant projects while working collaboratively with cross-functional teams.

Formación

• 5+ years working as a frontend developer with expertise in HTML, CSS, JavaScript, and React.
• Experience with testing libraries and frameworks like Testing Library and Cypress.
• Fluency in Spanish and English (C1 minimum).

Responsabilidades

• Participate in all phases of the software development lifecycle.
• Design and develop high-performance and scalable web interfaces.
• Optimize applications for speed and scalability.

Conocimientos

HTML

CSS

JavaScript

React

Frontend testing frameworks

Bilingual in Spanish and English

Problem-solving skills

Teamwork

Herramientas

Astro

Tailwind CSS

Descripción del empleo

About us / Corporate presentation Holafly is a fast-growing start-up that is changing how travelers connect to the internet abroad.

Since 2018, we have been providing peace of mind to travelers around more than 150 worldwide destinations.

We are a young and international team of over 500 people based worldwide working to provide stress-free experiences for all travelers.

We are looking for someone with experience in this industry who can help us keep growing.

Above all, we are seeking an individual who enjoys working in a team, can express ideas assertively, and wants to contribute, learn, and feel useful.

We are specifically seeking a Senior Frontend Developer (100% remote) who can apply best practices that will be a significant part of their daily work.

The ideal candidate will combine strategic thinking with hands-on skills to streamline and scale processes effectively.

• Team presentation: You would be part of the IT Delivery team.

We currently have more than 50 colleagues working internationally from home.

For us, companionship and enjoyment when doing our work come first.

We believe in continuous improvement, automation, and collective knowledge without leaving human values behind.

Always following best practices.

What will you do?

In 1 month: Get to know the team, main projects, and stakeholders with their characteristics and interlocutors.

Familiarize yourself with the framework and work technologies.

Understand and follow corporate procedures (time entry, vacation requests, communications, ...).

Start contributing and proposing improvements based on your previous experience and knowledge.

You will begin to solve your first incidents, question, and propose solutions.

In 3 months: You will have autonomy and will be working independently with stakeholders and projects.

Help your colleagues progress.

Contribute to the evolution and improvement of Holafly projects, as well as work methodologies and tools.

In 6 months: You will be in charge of projects / initiatives appropriate to your expertise and knowledge, interacting with the stakeholders and proposing solutions.

At all times you will have the collaboration of your colleagues for any questions you may need.

You will continue to evolve technically.

Responsibilities:

• Participate in all phases of the software development lifecycle, from design and development to testing and deployment.
• Design and develop high-performance, scalable, and maintainable web interfaces with a strong focus on usability, accessibility, performance, and responsiveness.
• Translate design wireframes and user requirements into high-quality, maintainable frontend implementations.
• Optimize applications for maximum speed and scalability, with special attention to web performance and SEO.
• Ensure consistency across platforms and devices, addressing cross-browser compatibility and responsive behavior.
• Maintain and evolve component libraries and design systems to promote consistency and reusability.
• Monitor and improve frontend performance, identifying and resolving bottlenecks in the user experience.
• Implement and maintain unit, functional, and end-to-end testing strategies to ensure quality and prevent regressions.
• Write clean, well-documented, and testable code, ensuring code quality and efficiency.
• Documentation and improvement of procedures.
• Interlocution and direct contact with stakeholders and business analysts.
• Technical and planning monitoring of projects / initiatives.
• Guide and support your colleagues in their professional development.
• Collaborate with cross-functional teams working closely with designers, product managers, backend developers, and QA engineers.
• Promote and enforce best practices in software development, including code reviews, testing, and documentation.
• Collaborate with the architecture team to define and evolve system architecture.
• Stay up to date with the latest frontend technologies and trends, and recommend tools, practices, patterns, and approaches to improve the development workflow.

What do we expect?

Personally

• Be a good person (Mandatory!).
• Initiative and problem-solving skills.
• Teamwork and empathy towards colleagues and stakeholders.
• Results-driven, self-motivated, and able to work independently.
• Bilingual proficiency: Fluency in Spanish and English (C1 minimum).

Technical background and skills: Solid base in the following areas or technologies:

• 5+ years working as a frontend developer, with demonstrated expertise in HTML, CSS, JavaScript, and React, including building reusable components and managing application state.
• Nice to have: experience with Astro, Tailwind CSS, and modern static site generation or partial hydration strategies.
• Hands-on experience with frontend testing libraries and frameworks (e.g., Testing Library, Cypress, Playwright).
• Understanding of SEO fundamentals for web applications.
• Proven experience in third-party application integration.
• Integration with APIs and management of asynchronous data flows.
• Basic understanding of microservices architectures and how to integrate frontend applications with distributed backend systems.
• Knowledge and application of design patterns.
• Proven expertise in reference web architectures.
• Ability to work with legacy code.
• Basic knowledge of cloud providers and their main services.
• Highly valuable to have certifications related to these skills.

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