Frontend Developer Flutter

At 433, we build platforms for millions of football fans worldwide. Our users open the app around matches, goals, transfers, breaking news, and viral football moments. In those moments, the experience needs to feel fast, smooth, and intuitive.

That’s why we’re looking for a Frontend Developer Flutter who not only builds screens, but also understands how an app feels to the user.

Do you have an affinity with football and do you get energy from develop our 433 app? We are looking for a Frontend Developer Flutter to strengthen our team.

About Us
Born from a deep passion for the beautiful game, 433 represents global football culture at its core. With more than 80 million followers worldwide, including many of the sport’s greatest players, we are the largest online football platform in the world. Through close relationships with players, clubs, and leagues, we operate inside the locker room, capturing moments fans never had access to before.

Behind every swipe, feed, notification, and video is technology that needs to feel fast, stable, and seamless.

About the Role
We have an exciting opportunity for a Frontend Developer to join our Tech team. In this role, you will work on the frontend of our football products. This includes the 433 app, interactive screens, football content, video, feeds, match information, notifications, and new features for fans all over the world.

Key Responsibilities

• Developing mobile interfaces in Flutter

• Building smooth, clear, and fast user flows

• Improving user experience

• Optimizing app performance

• Collaborating with backend developers, designers, content teams, and product owners

• Contributing ideas around navigation, interaction, and visual feedback

• Analyzing why something feels slow, unclear, or unintuitive

• Building features that must continue to perform during major football moments

What We’re Looking For

We’re looking for someone who sees beyond “the screen is there.” Someone with a strong sense of interaction, timing, performance, and detail.

You have experience with:

• Flutter and Dart

• Mobile app development for iOS and Android

• State management

• API integrations

• Performance optimization in mobile apps

• Responsive layouts and different screen sizes

• Git and modern development workflows

Experience:

• Analytics, A/B testing, video, caching, push notifications, or high-traffic apps is a plus.

• Marketing tools: Segment, Airship or Branch.io is a plus

Who You Are:
As a Frontend Developer at 433, you are:

• Goal-oriented, determined, and passionate about social media.

• Enjoy football, or at least understand that timing is everything in football

• Comfortable in a dynamic and ambitious scale-up environment.

• Educated to a minimum of HBO level in a software engineering, ICT or communication and multimedia design field.

• Experienced, with at least 2+ years as a Developer (incl. Flutter experience).

• Fluent in English, with excellent communication skills, Dutch is a plus.

• Lives in the Amsterdam area and is able to come to the office once a week.

• An innovative and proactive team player.

• Understand that an app shouldn’t just work, but should feel good to use.

• Take performance seriously.

• Have an eye for detail without getting lost in pixel-perfect discussions.

• See user experience as part of engineering.

• Prefer measuring over guessing.

• Understand that football moments create traffic peaks

• Like clear and practical solutions.

• Get energy from products used by large audiences.

What’s in It for You?
We are committed to creating an environment where everyone can thrive. To support this, we offer:

• The opportunity to work on apps with a large international audience.

• A product environment where speed and user experience truly matter.

• Plenty of room for your own ideas and input.

• Short communication lines between product, design, content, and tech.

• A down-to-earth team with a passion for football and quality software.

• Challenging problems around mobile performance, interaction, and scalability.

• A competitive salary and benefits, including a pension plan and stretched vacation days.

• A young, ambitious team in a dynamic work environment.

• An office with a lot of sport activities; like Padel, kickbocksing, or you can challenge colleagues to ping-pong.

• Daily catered lunch at the office.

Apply Now!
Would you like to build apps used by millions of football fans? Follow the link below to apply.

Send us your application, portfolio, GitHub profile, LinkedIn, or simply a short explanation of why this role suits you.

We’re not looking for someone who just moves screens around.
We’re looking for someone who builds great product experiences.