Backend Developer

We grow passionate communities.

Are you passionate about software development and curious about everything related to technology? If crafting code is part of your life, at Qualifio, you can make it your career and apply it to Digital Marketing solutions used by over 400 companies in Europe and around the world.

We strongly believe in creating a work environment that puts people first, where human values guide important decisions. We empower our team to grow personally and professionally in a flexible and rewarding workplace. Our commitment is to align your work-life balance with your career goals and personal aspirations.

Who are we? 👋

We are a team of 76 developers, marketers, designers, customer service representatives, thought leaders and food lovers operating from Louvain-La-Neuve, near Brussels, with offices in Barcelona and Paris. Our strength? Our people!

Our vibrant culture comes from a decade of interactive marketing expertise with our human values, mixing transparency, commitment, fun, empowerment, togetherness and creativity.

🛠️ What you’ll do as a Backend Developer

You won’t just write code. You’ll architect solutions, shape features, mentor junior devs, and co-create in an Agile environment that’s fast-paced, supportive, and full of opportunity.

Here’s what your day-to-day could include:

• Collaborating with fellow devs and PMs on high-impact, technically challenging projects

• Designing, building and refining backend features using Node.js and TypeScript

• Creating secure, scalable APIs and SDKs for public use

• Improving performance, refactoring legacy systems, and moving us toward a microservices architecture

• Pioneering the smart use of AI in everything that we do

• Mentoring peers and reviewing code (pull/merge requests)

• Partnering with clients and integrating with their systems to become a key part of their data value chain

• Pushing code that meets our high bar for security, performance, and maintainability

🧠 What we’re looking for

We know no one ticks every box, but if you’re nodding along, we want to talk:

• 3–5 years of hands-on experience as a Backend Developer

• Extensive experience in Node.js (TypeScript)

• Proficient with SQL/NoSQL databases like PostgreSQL, Elastic, etc

• Good understanding of asynchronous programming

• Comfortable with authentication and authorisation flows between multiple systems, servers, and environments

• Strong grasp of Git (GitLab, GitHub) and CI/CD principles

• Awareness of accessibility and GDPR best practices

• Fluent in English and French

• Passionate about code. Always learning. Team-first mindset

Join us! 🎉

Joining Qualifio means becoming part of a healthy and stimulating work environment where human values are central. We thrive in a fast-paced environment, tackling digital marketing challenges for Europe’s leading companies. You’ll integrate an ambitious company where the startup spirit is still going strong. We also excel at having fun, and our team spirit will inspire you.

At Qualifio, we care about our people and believe everyone should be empowered to reach their fullest potential. That’s why we provide our employees with many growth opportunities, like ongoing training and skill development programs.

Qualifio offers an attractive salary package, with many non-financial benefits contributing to our employees’ healthy work-life balance.

Does it sound like a workplace you’d fit in? Let’s have a chat!