Frontend Engineer

Airalo

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Location: United Kingdom, Spain
Job Type: full-time
Work Format: 🌍 Remote
Salary: £74,800 - £107,500 a year
Posted: July 12, 2026

Job Description

Help Us Build The Future of Travel

At Airalo, we're making it easier for people to stay connected wherever they travel. As the world's first eSIM store, we help millions of travelers access affordable mobile data in 200+ countries and regions around the world.

Today, we're a team of 400+ people across 60+ countries, building a product used by travelers every day. We've grown quickly, but we've worked hard to keep what matters: trust, ownership, and the freedom for people to do great work without unnecessary layers or bureaucracy.

We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.

Your Next Destination

Location: Remote, anywhere in Spain or the UK.
Contract:
- Spain: Full-time, permanent contrato indefinido via Deel (our employer of record in Spain)
- UK: Full-time, permanent
Languages: English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async.

We are looking for a proactive Frontend Engineer to join our expert team in evolving our core platform. You will focus on building high-quality, scalable components and delivering seamless user experiences that help connect travelers worldwide. We value developers who are detail-oriented, collaborative, and passionate about writing clean, maintainable code in a fast-paced environment.

Your Main Responsibilities:

Feature Development: Build and maintain high-quality software components and scalable features based on product specifications.
Performance & SEO: Optimize user interaction and improve SEO to ensure a fast, responsive, and seamless single-page application (SPA).
Code Quality: Apply unit testing, SOLID principles, and clean code practices to ensure the long-term health of the codebase.
Collaboration: Work closely with cross-functional teams (Product, Design, and Backend) to estimate tasks, provide progress updates, and troubleshoot technical issues.
Implementation: Translate business requirements into elegant frontend code using modern build pipelines and tools.

Does This Sound Like You:

3–5 years of professional frontend experience with strong proficiency in JavaScript and CSS.
2+ years of hands-on experience building SPAs using VueJS.
Good understanding of OOP, SOLID principles, and common design patterns.
Solid experience working with RESTful services, Git, and containerization tools like Docker.
AI Proficiency: Ability to effectively use AI tools during technical tasks; we value engineers who know how to prompt, validate, and iterate with AI to build better software faster
Experience writing automated tests (unit/integration) and a strong eye for responsive, cross-browser compatible design.
Familiarity with Agile methodologies and working in a sprint-based environment.
Fluent English with the ability to communicate technical concepts clearly to both technical and non-technical teammates.

Bonus:

Knowledge of UI/UX best practices and experience with A/B testing.
Experience in TravelTech, eSIM, or GSMA technologies.
Familiarity with cloud application architectures (AWS/GCP).

£74,800 - £107,500 a year

At Airalo, we believe in roaming-free recruitment. Just as we provide clear connectivity for travelers, we provide clear salary ranges for our candidates. 🌍

Given this role is remote and available to candidates across some countries in Europe, this range represents the full salary range for this role across our available locations in the EU. To ensure equity based on where you reside we use a tiered location model:

📍 UK: £74,800 to £107,500

📍 Spain: €58,000 to €83,500

Your Home Destination: 🛫 Specific salary ranges used in offers are determined by where you reside. We’re committed to discussing these ranges openly during your first call with our Talent to ensure we’re aligned for takeoff! 🎒✨

Why People Join Us

🇪🇸 Why people join us in Spain

We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product were customers first.

Our team is united by a shared belief that great work happens when people are trusted to own what they do. As Airalo continues to grow, so do the opportunities to learn, take on new challenges, and make a real impact.

For many of our teammates in Spain, it's the combination of stability, flexibility, and genuine work-life balance that makes Airalo feel like home.

🇬🇧 Why people join us in the UK

We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product first discovered us as customers.

Our team spans 60+ countries, but what people often notice quickly is how work actually feels here. There's trust to own what you do, space to focus without constant layers of process, and a clear sense of what you're responsible for from day one.

As Airalo continues to grow, people tend to stay for a mix of things: the chance to work on a product used globally, the autonomy to shape how they work, and the opportunity to keep taking on new challenges without getting stuck in one lane.

Before You Hit Apply

By applying, you acknowledge and agree that, in case of successful application, Airalo may request to run background checks as a condition for entering into an agreement with you. Rest assured that these checks will only occur upon your prior consent and at the end of the selection process, and will be strictly limited to what is allowed under the laws that are applicable to you.

We sincerely thank all applicants in advance for submitting their interest in this opportunity. Airalo is an equal-opportunity employer and values diversity, equity & inclusion. We do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We are committed to providing reasonable accommodations upon request for individuals with disabilities throughout our job interview process.

🎯 Who is this job for?

This role is best suited for a Middle Frontend Engineer with 3–5 years of experience building modern single-page applications and delivering high-quality user experiences. The candidate should be proficient in Vue.js, JavaScript, CSS, REST APIs, Git, Docker, automated testing, responsive design, SOLID principles, design patterns, and AI-assisted development, with AWS/GCP and A/B testing experience as a plus. They should be familiar with developing scalable SPAs, optimizing performance and SEO, collaborating with Product, Design, and Backend teams, implementing responsive interfaces, and maintaining clean, testable frontend code.

💬 Potential Interview Questions

How would you structure a large-scale Vue.js Single Page Application (SPA) to ensure maintainability and scalability?
Answer: I would organize the project by feature modules, separate business logic from UI components, use reusable composables, centralize shared state with Pinia or Vuex when necessary, and enforce consistent coding standards with TypeScript and linting.
What are the key differences between Vue 2 and Vue 3, and why is the Composition API beneficial?
Answer: Vue 3 offers better performance, smaller bundles, improved TypeScript support, and the Composition API, which promotes reusable, modular logic and improves maintainability in large applications.
How do you optimize the performance of a Vue.js SPA?
Answer: I use lazy loading, route-based code splitting, tree shaking, image optimization, component memoization where appropriate, efficient state management, and continuously monitor Core Web Vitals.
How would you improve SEO in a Single Page Application?
Answer: I would use server-side rendering (SSR) or static site generation (SSG) when appropriate, optimize metadata, implement semantic HTML, generate XML sitemaps, and ensure pages are crawlable by search engines.
What SOLID principles are most relevant in frontend development?
Answer: Single Responsibility keeps components focused, Open/Closed encourages extensibility without modification, and Dependency Inversion improves testability by reducing coupling between components and services.
How do you consume REST APIs efficiently in a Vue application?
Answer: I create dedicated API service layers, handle loading and error states consistently, cache data where appropriate, validate responses, and keep network logic separate from presentation components.
How do you ensure cross-browser compatibility and responsive design?
Answer: I follow web standards, use responsive layouts with Flexbox and CSS Grid, test across major browsers and devices, leverage progressive enhancement, and verify accessibility throughout development.
Describe your approach to automated testing in frontend applications.
Answer: I write unit tests for components and composables using tools like Vitest or Jest, integration tests for key workflows, and ensure tests run automatically in CI pipelines before deployment.
How do Docker and containerization benefit frontend development?
Answer: Docker provides consistent development and production environments, simplifies dependency management, enables reproducible builds, and integrates well with CI/CD pipelines for reliable deployments.
How do you use AI tools effectively during software development without compromising quality?
Answer: I use AI to accelerate implementation, generate tests, explore solutions, and improve documentation, but I always validate generated code, review edge cases, and ensure it aligns with project architecture and coding standards.

📋 Job Summary

Airalo is the world's first eSIM marketplace, helping millions of travelers stay connected across 200+ countries through a fully remote, global-first team. As a Frontend Engineer, you'll build scalable, high-performance user experiences using Vue.js, JavaScript, CSS, REST APIs, Docker, and modern frontend best practices, collaborating closely with Product, Design, and Backend teams. This is a full-time remote role available in Spain or the UK, offering €58,000–€83,500 (Spain) or £74,800–£107,500 (UK), along with excellent benefits, strong work-life balance, and a culture built on trust and ownership. If you're passionate about creating polished web experiences for a product used by millions of travelers worldwide, Airalo is an exciting place to grow your career.