Junior Fullstack Developer (Hybrid)

Opt Out Advertising; Amsterdam; Hybrid; EUR 31,000 - 42,000; Full time

Benefits offered by this job

Laptop provided

Pension plan

Travel reimbursement

Home office option

Team lunches and outings

Job summary

Opt Out Advertising is seeking a Junior Full Stack Developer for a hybrid role in Amsterdam. You will assist in building and maintaining advertising platforms, design APIs and backend logic, and contribute to intuitive frontends while growing with a privacy-first adtech team.

The role suits those with 0–2 years of experience, comfortable with Java, C#, JavaScript (React), and MySQL, and who are eager to learn in a collaborative environment in the Netherlands.

Qualifications

• 0–2 years of experience as a Fullstack Developer or strong portfolio/internship experience.
• Basic knowledge of programming languages such as Java, C#, Javascript (React).
• Experience with Scala is a plus.
• Familiar with databases like MySQL.
• A proactive mindset and strong team spirit.
• Fluent in Dutch and English.
• Curiosity about digital advertising, privacy, and innovation.
• Hybrid working at our office in Amstelveen. Not fully remote; based in the Netherlands.

Responsibilities

• Assist in building and maintaining advertising platforms.
• Learn to design APIs and backend logic.
• Contribute to intuitive and responsive frontends.
• Help integrate external tools and systems.
• Grow with the team and contribute to innovation.
• Learn how to tackle scaling and performance challenges.

Skills

Java

C#

Javascript (React)

Tools

MySQL

Job description

Junior Full Stack Developer Vacancy

Junior Fullstack Developer (Hybrid)

As Junior Fullstack Developer, you'll be working on innovative technologies that enable privacy-first advertising. You'll contribute to and help maintain systems that combine scalability, efficiency, and intuitive interfaces. Opt Out Advertising is an ambitious scale-up building privacy-friendly marketing solutions. With an energetic team and clients such as NPO, The Guardian, and Reuters, we deliver impactful advertising campaigns. We are rapidly growing in the Netherlands and expanding into the UK.

Salary

€2750 - €3750

Contract

Full time (40 hours)

Location

Amsterdam

What you'll be doing

• Assist in building and maintaining advertising platforms.
• Learn to design APIs and backend logic.
• Contribute to creating intuitive and responsive frontends.
• Help integrate external tools and systems.
• Grow alongside our team and contribute to innovation.
• Learn how to tackle scaling and performance challenges.

Qualifications

• 0–2 years of experience as a Fullstack Developer (or a strong portfolio/internship experience).
• Basic knowledge of programming languages such as Java, C#, Javascript (React).
• Experience with Scala is a plus.
• Familiar with databases like MySQL.
• A proactive mindset and strong team spirit.
• Fluent in Dutch and English.
• Curiosity about digital advertising, privacy, and innovation.
• Hybrid working at our office in Amstelveen. Not fully remote, so you'll need to be based in the Netherlands.

What's in it for you?

• Competitive salary based on experience.
• Modern workspace in Amstelveen (with a view of the Zuidas) and possibility to work from home.
• Team lunches, drinks, and outings.
• Informal atmosphere with room for creativity and initiative.
• Holiday allowance and a pension scheme.
• Laptop and phone provided by us.
• Travel reimbursement, T&E Budget, pension plan, and holiday allowance.

About Opt Out Advertising

At Opt Out Advertising, we combine cutting-edge technology with ethical innovation to reshape the digital advertising landscape. We are a privacy-first adtech company with our own Ad Server, DSP, and publisher network, all built on proprietary technology. We are different compared to all the others in the industry. Brands and publishers alike love us for that.

The Process

• Personality test via Neurolytics.
• 1st interview.
• 2nd interview.
• Job offer.