Frontend Software Engineer

Learnlight

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Location: Serbia, Spain
Job Type: full-time
Work Format: 🌍 Remote Worldwide
Salary: Not specified
Posted: August 15, 2026

Job Description

Join Our Mission

is an EdTech company that believes in putting people first. We take every opportunity to do that with enthusiasm, initiative, and commitment. We find joy and deep satisfaction in delighting our clients, empowering our learners, and helping our team to excel in everything they do.

Our mission is to help organizations develop human skills to understand, empathize, and connect effectively with others in the global workplace. We exist to close the gap between strategy and execution by building communication skills that make companies collaborate more effectively: language, cultural intelligence and interpersonal fluency. We do this through a combination of best-in-class trainers and a leading, AI-powered platform. Combined with a long-term, sustainable approach, we aim to safeguard our people, the communities we serve, and our planet.

Your Career Opportunity

In this exciting new career opportunity, you’ll be reporting to the Engineering Manager on full-time hours and working from home remotely.

As a Frontend Software Engineer, you’ll have a direct impact on developing and maintaining complex web applications using React.js and other front-end technologies.

Collaborating with colleagues from our Innovation Department, you will:

Develop and maintain complex, high-quality web applications using React.js and modern front-end technologies

Work closely with designers and backend teams to deliver responsive, user-friendly, and visually polished interface

Write clean, well-structured, and scalable code following best practices and documentation standards

Optimize application performance to ensure speed, scalability, and a smooth user experience

Troubleshoot, debug, and resolve issues throughout development, testing, and deployment
Mentor junior developers and stay current with emerging front-end trends to guide technical direction

What You'll Offer

Advanced level of English, with strong communication skills
At least 5 years of professional experience with React.js

Strong proficiency in JavaScript, HTML, and CSS

Hands-on experience working with GraphQL or RESTful APIs, and developing responsive user interfaces

Familiarity with Agile/Kanban methodologies and tools such as Atlassian Cloud
A strong understanding of web accessibility (WCAG) and the ability to create inclusive, user-friendly digital experiences for everyone
Experience with state management libraries (e.g., Redux, MobX) and testing frameworks such as Jest, Enzyme, or Cypress is a plus

What We Offer

Work-Life Balance: Benefit from our remote work from home culture, with options to collaborate with colleagues in regional offices (if applicable). Enjoy generous paid time off including public and personal holidays and two company-wide days off per year to recharge.

Learning & Development: Access to language learning, masterclasses and professional development opportunities with a culture of coaching and constructive feedback.

Community Events: Make new friends and connect with colleagues at virtual wellbeing sessions, team-building activities and informal social clubs.
Cultural Collaboration: Our provides valuable insights to help you build collaboration across diverse cultures.

Recommend a Friend: Earn a bonus by referring talented professionals to join Learnlight through our referral program (conditions apply).

Regardless of gender, religion, ethnicity, sexual orientation, age or disability, we are proud to welcome, and support, new talent from all communities. Click to learn more about our and commitments.

Ready to Join Us?

Our colleagues – also known as Learnlighters - live by our values of enthusiasm, initiative and commitment. We review applications regularly and interviews are being scheduled now, so we encourage you to apply as soon as possible. Learnlight is a global company and we look for English communication skills for effective collaboration - please apply with your résumé in English.

The personal data you provide will be processed by Learnlight in order to manage your candidacy for the corporate selection processes that fit your profile. Under the legal conditions, you have the right to access, rectify and delete the data, to limit its processing, to oppose its processing and to its portability to our address (Calle de las Huertas 11, 28012 - Madrid) or to the email address privacy(at)learnlight.com. You can find more information in the Privacy Policy of our website

#LI-Remote

🎯 Who is this job for?

This role is suitable for a Senior Frontend Software Engineer with at least five years of professional React.js experience and advanced English communication skills. The candidate should be proficient in JavaScript, HTML, CSS, responsive UI development, GraphQL or REST APIs, web accessibility, Agile/Kanban practices, and preferably state management and frontend testing tools. They should be experienced in building and maintaining complex web applications, optimizing performance, debugging issues, collaborating with designers and backend teams, and mentoring junior developers.

💬 Potential Interview Questions

How would you structure a complex React application to keep it scalable and maintainable?

I would organize the application by features or domains, separating components, hooks, services, state, and tests. I would also establish clear boundaries, use reusable presentational components, and document key architectural decisions.

How do you optimize the performance of a React application?

I would measure performance first using browser profiling and tools such as Lighthouse. Common improvements include memoization, code splitting, lazy loading, efficient list rendering, minimizing unnecessary re-renders, and optimizing API requests.

What is the difference between controlled and uncontrolled components in React?

Controlled components store their value in React state, making the component behavior explicit and easy to validate. Uncontrolled components keep their value in the DOM and are accessed through refs, which can be useful for simpler forms or integration with non-React code.

How would you manage global state in a React application?

I would keep local UI state within components and use a state management solution such as Redux for shared, complex, or long-lived state. The state structure should be predictable, normalized where appropriate, and updated through clearly defined actions or reducers.

How would you design a frontend integration with GraphQL or REST APIs?

I would isolate API communication in dedicated services or hooks, define consistent loading and error states, and validate the response shape. For GraphQL, I would use focused queries and mutations, while for REST I would standardize resource methods, caching, and error handling.

How do you ensure that a responsive interface works across different devices?

I use a mobile-first layout with flexible grids, responsive units, and CSS media queries. I also test at representative viewport sizes and verify touch interactions, typography, images, and content behavior on both mobile and desktop devices.

What practices do you follow to make a React application accessible according to WCAG?

I use semantic HTML, keyboard-accessible controls, appropriate labels, visible focus states, sufficient color contrast, and meaningful alternative text. I also test with automated accessibility tools and, when possible, screen readers and keyboard-only navigation.

How would you test a React component or user workflow?

I would use Jest with a React testing library for unit and integration tests that verify behavior from the user’s perspective. For critical end-to-end workflows, I would use Cypress to test realistic interactions, API states, navigation, and error scenarios.

How do you troubleshoot a frontend issue that occurs only in production?

I would reproduce the issue using production-like data and configuration, then inspect logs, monitoring information, source maps, network requests, and browser differences. I would isolate the root cause, create a regression test, and deploy a minimal, verified fix.

How do you collaborate with designers and backend engineers in an Agile or Kanban team?

I clarify requirements, API contracts, accessibility expectations, and responsive behavior before implementation, while raising risks early. I keep work visible in tools such as Atlassian Cloud, provide regular updates, participate in reviews, and give constructive feedback through the delivery process.

📋 Job Summary

Learnlight is a global EdTech company using expert trainers and an AI-powered platform to help organizations build stronger communication, language, and cultural skills. As a Frontend Software Engineer, you’ll develop and optimize polished, accessible web applications, collaborating with designers and backend teams using React.js, JavaScript, HTML, CSS, GraphQL/REST, and modern testing and state-management tools. This is a full-time, fully remote role open to candidates in Serbia and Spain, with a salary that is not disclosed. Apply to make a meaningful impact in global learning while enjoying flexible remote work, professional development, generous time off, and an inclusive international culture.