Fullstack JS developer | Advertisement

What do they do?

In terms of traffic, this party certainly cannot complain. With the largest sports platforms in the Netherlands, they generate hunderds of thousands of visitors a day and millions a month. They create high-quality daily relevant content by merging editing and technology. This has to do with their goal. They want to reach and interest all sports fans to interact with the content. Whether it is football or Formula 1, they create it.

They do this with a young team with a passion for the business. Creating champions leaque worthy quality, software, content and everything it takes to be the biggest platform in the Netherlands. The atmosphere within this company is what you can expect from a professional organization with a love for sport. Competitive, sociable and atmospheric. For example, you can think of the Friday snack day with FIFA tournaments or just a cosy get-together where you chat about the weekend plans. There is something for everyone within the organization because with 100 employees, you will always have a nice colleague!

What is it what you are going to do?

Due to ongoing growth, our client is looking for a Full Stack Developer to strengthen their advertising engineering team. You’ll help shape and scale a system that serves millions of ad impressions each month across ~150 websites and several apps.

You will:

• Develop and optimize ad blocks and banners that maximize revenue while maintaining UX

• Build and maintain high-performance ad scripts with minimal libraries

• Work on CMP flows (Consent Management) and privacy-compliant ad delivery

• Create tools to automate bidding, reporting, inventory handling, and more

• Monitor performance, test new formats, and stay ahead of legal & tech trends

• Dive deep into browser-level optimizations and rendering behavior

• Collaborate with sales and product stakeholders to deliver business impact

This is a high-impact, high-autonomy role in a compact team. Code often goes straight to production so confidence and accountability are essential.

What do you need to have?

What specifically do you need?

• Strong command of JavaScript/TypeScript, HTML & CSS

• Experience with frameworks like React, Vue, or Next.js

• A pragmatic, solution-oriented mindset

• Curiosity for browser internals and performance optimization

• Experience with advertising ecosystems (Google Ads, programmatic, CMPs) is a plus

• Ability to work autonomously, take ownership, and solve complex problems

• Strong communication and collaboration skills

This is what you will get

Besides of it being a cool role, you will also get nice things in return:

• Salary of up to 70k per year
• 100% travel reimbursement
• 24 holidays
• Laptop of your choice
• Personal development budget
• Working in a brand new office in the Overamstel area
• Participation in relevant and interesting events
• Obviously a free subscription to your favourite platforms
• Hyrbid working environment (Tuesday and Fridays at the office)

Does this sound like the scoring the winning goal in the final? Call our consultant Gino van Schagen at +31626051747 or email g.vanschagen@haystackpeople.nl