Frontend Developer (TypeScript, React)

Overview

We're looking for a motivated Frontend Developer to join our UGC Platform Team in Barcelona.

Flowbox was founded in 2016 and is a fast-growing tech scale-up with large ambitions and broad visions. We provide a SaaS platform that helps brands improve their marketing, social media and e-commerce strategies. Our technology helps our clients to better collect, manage, and distribute their own customers' content, aka user generated content (UGC).

Earlier this year, Flowbox acquired the Danish company Dreaminfluence, a leading influencer marketing platform. Post-acquisition, Flowbox now serves more than 1,000 customers, reports close to €9M in ARR, and employs over 70 people across offices in Stockholm, Barcelona, Amsterdam, and Copenhagen.

Tech Stack

We work with a modern, component-driven frontend stack designed for performance, scalability, and great developer experience :

• Languages & Frameworks : React, TypeScript, JavaScript (ES6+), Svelte (plus)
• UI & Styling : Material UI, CSS3, Sass, CSS Grid, Flexbox
• Build & Tooling : Vite, Webpack, Jest, Vitest, React Testing Library, ESLint, Prettier
• Architecture & State Management : Redux, Zustand, Context API, Microfrontend Architecture, Modular Architecture, RESTful APIs, GraphQL (Apollo Client)
• Infrastructure & Cloud : AWS (S3, CloudFront, Lambda), Docker, GitHub Actions for CI / CD

About the team

Our Tech Department is made up of two core teams :

We work cross-functionally in a hybrid environment, collaborating across disciplines to deliver impactful solutions. In this team, you’ll find a balance of challenge, creativity, and ownership, with plenty of opportunities to make a real impact on Flowbox’s core product.

We believe in pair programming, regular code reviews, and open feedback, helping each other grow while maintaining high-quality standards across everything we build.

Your mission

As a UGC Platform Frontend Developer , you’ll play a key role in shaping the core of our product, the infrastructure that powers a platform trusted by hundreds of leading brands worldwide.

You’ll join an autonomous, agile, cross-functional team that designs, builds, and maintains scalable, high-performing systems for collecting, processing, and delivering user-generated content at scale.

In this role, you will :

About you

You’re a frontend developer with 2-3+ years of experience building modern, responsive web applications. You have strong, hands-on experience with React and JavaScript, complemented by a solid understanding of TypeScript. You take pride in writing clean, maintainable code and building engaging, high-quality user interfaces.

You have a good eye for design and accessibility, using tools like CSS Grid, Flexbox, and Material UI to craft responsive interfaces that look great on any device. Experience with Svelte is a plus, and you’re always eager to explore new technologies that can improve your workflow or the user experience.

You thrive in collaborative, open environments where ideas are shared freely. You’re curious about how users interact with your product and motivated by delivering features that create real business value. Above all, you’re passionate about continuous learning, improving your craft, and contributing to great products that make a difference.

Why join Flowbox?

Flowbox offers a fast-moving and, at the same time, relaxed work environment in modern premises in the heart of Barcelona.

You will have large responsibilities and great career opportunities. You will work with a wide and modern tech stack; as one of our teammates says : “if you work at Flowbox, you will be able to work anywhere”. We want to accomplish our goals, but we need your help to do so.

More about our perks :

Apply today! We can\'t wait to meet you!