Data-, Telecomspecialist vacatures in Rotterdam

Full Stack Developer

Software Engineering

Posted on Dec 6, 2025

Are you completely ready to showcase your skills as a Fullstack Developer at a fast-growing, international scale-up? Within our driven development team, we offer you the chance to play a crucial role in achieving our ambitious goals. Will you be the driving force behind our data goldmine? Then come aboard quickly and be part of our winning team!

Who are we?

At Leadinfo, we dominate the B2B marketing world! Leadinfo is the number one in B2B lead generation. We believe not just in numbers and campaigns but in a mix of creativity, passion, and discovering new possibilities. We are a vibrant scale-up with our headquarters in Rotterdam. We have thousands of clients and collaborate with more than 2,500 marketing agencies and major players like LinkedIn, Google, and HubSpot. Our mission? To provide every business with top-quality leads! Our young team of 80 colleagues, including 10+ software developers and data engineers, has a strong winner's mentality to achieve this goal. We operate from our offices in the Netherlands, Belgium, Italy, Denmark, and Germany.

What will you be doing?

As a Fullstack Developer at Leadinfo, you will have a challenging and responsible role where you will work on our product, more specifically our internal tools and applications. Our goal is to provide the best user experience, and we always strive to achieve this to the fullest. That's why we constantly push the technology and iterate on all features to deliver maximum results and nothing less than a wow effect.

Your responsibilities:

● Development and maintenance of our tools and applications: As a Fullstack Developer at Leadinfo.com, you will work on the development and maintenance of web scraping tools and related applications used to collect and analyze data from various websites. This includes writing code to extract and process data from different sources and integrating it into the platform.

● Expansion of applications to new countries: At Leadinfo, we are growing fast and want to conquer the world with our product. To achieve this, it's essential to build applications for our international expansion.

● Research and development of new technologies: You will be continuously researching and implementing new technologies and frameworks to improve the platform's performance and further optimize the user experience.

● Mentor junior engineers, follow DevOps practices and set up best practices: As an experienced developer we expect more than just building features and reviewing code. You should help us improve our standards, put in place best practices and a culture of ownership and DevOps mentality and mentor and coach our juniors.

Requirements:

To get started as a Fullstack Developer at Leadinfo.com, you will need more than 4 years of experience as a software developer and will work with various tools and technologies, including:

● PHP 8+ and Slim framework (no experience specifically with PHP version 8 or Slim required)

● Cloud computing with AWS

● Front-end development with React

● Experience with DevOps practices and being responsible for deployment

● The Leadinfo winner's mentality, with passion and enthusiasm to improve every day

● Enjoys hybrid working, both at our Dutch office and from home

Perks at Leadinfo:

At Leadinfo, we value your efforts! What do you get in return?

● 26 vacation days + an extra day off on your birthday