JAK Solutions
The agency focused on performance and custom development

Since our creation, we have been supporting companies in the design and development of high value digital solutions. As a web agency specialized in web application development, high performance website creation and custom solutions, we place strategy, code quality and business understanding at the heart of every project.

Our goal is simple: to design robust, scalable and truly useful digital tools for your growth.
Picture of the JAK Solutions team discussing  about a project
Avenue Reine Astrid 59A

Our agency at the gates of Brussels

Based in Wemmel, just outside Brussels, our web agency supports companies in the Brussels region with their web application development, website creation and custom digital solution projects.

Our strategic location allows us to stay close to our clients while providing an optimal working environment to design high performance and scalable solutions.

About our web agency

At JAK Solutions,
we are much more than a simple web agency.

We are a team of experts specialized in web application development, high performance website creation and custom digital solutions for businesses.
Each project represents a true partnership for us. We analyze your objectives, your market and your constraints in order to design web solutions that match your business reality. Our approach is based on strategy, development quality and a long term vision.
Based in Wemmel, just outside Brussels, our agency supports companies in the Brussels region and beyond in their digital transformation.

We work on both corporate website projects and complex business applications as well as scalable SaaS platforms.
From strategic thinking to production deployment, including technical architecture and custom development,
we focus on the performance, robustness and scalability of every digital solution.
In a constantly evolving digital environment, we help companies structure their digital tools to sustainably support their growth.

Our commitment is simple: to design useful, high performance web solutions built to last.

Our core values

Technical excellence

We develop robust, high performance and scalable web solutions. Code quality and architecture are at the core of every project.

Long term vision

We design sustainable digital solutions built to evolve and support your growth over the long term.

Collaboration

We work in close collaboration with our clients, with transparency and commitment at every stage of the project.

Who are our clients?

We support organizations that consider technology a strategic asset.
Our role is to translate their business challenges into high performance, sustainable and value creating digital solutions.

Companies and SMEs

Established organizations that want to modernize their tools, centralize their data or automate their internal processes.

We step in when standard software reaches its limits and operational performance becomes a strategic challenge.

Non profit organizations

Impact driven organizations that must balance budget constraints, administrative requirements and the need for digitalization.

We design reliable solutions that are easy to maintain and built to last.

Startups

Founders who need to turn a vision into a product that can be quickly brought to market.

We combine strategic framing, a well controlled MVP and scalable architecture to accelerate the launch while securing the next phases of growth.

Independent professionals

Professionals who want to improve efficiency, better manage their activity and use tools that truly fit the way they work.

We prioritize pragmatic, scalable solutions aligned with their business objectives.
Regardless of their size or industry, our clients are looking for a partner capable of translating their business challenges into reliable, scalable digital solutions that are strategically aligned with their vision.
At JAK Solutions, we support our clients with a demanding, structured approach focused on long term impact.

Meet our team

A clear mission:

 to build exceptional digital products recognized for their quality and impact.

Leadership

Kim Berthonneau

CEO / Solution Architect

Kim plays many roles at JAK Solutions. Usually, he's the first point of contact for prospects and clients, so chances are, your initial interactions will be with him. Blessed with a high degree of empathy, Kim has the unique ability to truly walk in your shoes and understand your needs at a fundamental level. His strong technical background equips him to convert your needs into customized digital solutions that fit your business like a glove.

Kim also has a passion for all activities related to boards. Don't be surprised if you spot him skateboarding down the street, snowboarding down a frosty mountain slope, or kitesurfing over the ocean waves in his free time.

Jon Pauwels

CTO / Lead Developer

Jon is the CTO at JAK Solutions. A true Swiss army knife, he blends strategic vision, team leadership, and technical expertise. He oversees the development team, structures projects, evolves the architecture, and still codes regularly, both in fullstack web and FileMaker development.

Analytical and naturally curious, he enjoys understanding how systems, technical or human, work at a deeper level. He places great value on code clarity, efficient processes, and healthy team dynamics. Outside of work, he plays padel weekly and spent many years playing chess, a game he still enjoys for its complexity and logic.

Andreas Couscouras

COO

An entrepreneur at heart, he joined JAK Solutions, drawn by the team’s quality standards and way of working. With solid experience in building and growing businesses, he now brings his strategic mindset and entrepreneurial vision to support JAK’s expansion.

As COO, he helps structure, organize, and optimize internal processes to drive the company’s sustainable and ambitious growth.

Our web experts

Corentin Grégoire

FullStack Developer

Since joining JAK, Corentin has quickly established himself as a key member of the team. His approach to development is both methodical and thoughtful: he pays close attention to every detail and never settles for anything less than excellence. Always seeking elegant and efficient solutions, he enjoys understanding the “why” behind every line of code and constantly strives to refine his methods.

Throughout various projects, Corentin has demonstrated strong adaptability, continuous technical curiosity, and a genuine commitment to quality work. He approaches each challenge with calm determination, and his high standards help raise the collective level of the team.

Behind his professional rigor lies a curious and passionate mind — someone who loves to learn, explore new technologies, and share his discoveries with others.

José Lopez Fernandez

Web Developer & SEO Specialist

Passionate about the digital world and equipped with strong expertise in web development and SEO, he supports businesses in creating high-performance, visually appealing, and strategically optimized websites that enhance their online visibility. Combining attention to detail, business insight, and creativity, he designs digital experiences that faithfully reflect each brand’s identity while maximizing their impact.

Committed to quality and close collaboration, he favors a results-driven approach where every project becomes an opportunity to create lasting value for his clients.

Dany Vanmuylder

FullStack Developer

Dany is a versatile and determined web/mobile developer who thrives on tackling challenges head-on. Known for his sociable and approachable nature, he brings a unique balance of professionalism and joyful collaboration to every project. His passion for coding goes beyond just work, he views it as a game, always looking for ways to optimize, innovate, and push his limits.

Outside of development, Dany is a competitive chess player with a strategic mindset, and a fan of various board games and video games. His love for these activities mirrors his approach to coding: patient, thoughtful, and always seeking the next move to gain an edge. Whether it's in development or in a game, Dany is someone you can count on to bring his best to the table.

Richi Nieto

Product Designer and Web Developer

Richi is a Product Designer and Web Developer passionate about creating beautiful and intuitive interfaces that seamlessly blend psychology and technology to deliver exceptional user experiences.

With over seven years of experience in a startup studio, he specializes in UX/UI design, branding strategy, and Code/No Code development. He enjoys helping startups grow, enhance their customer experience, and achieve their goals through smart and purposeful design.

A creative problem-solver by nature, he strives to find the perfect balance between best practices and the unique needs of each project.

Sebastien Vandaele

FullStack Developer

Sébastien is a passionate full-stack developer and tech lead who thrives on demanding projects that combine deep technical challenges with strong product vision. Curious and committed, he enjoys both designing robust backend architectures and refining seamless frontend experiences. His approach is driven by a constant pursuit of clarity, efficiency, and purpose — without ever giving in to unnecessary complexity.

Known for his analytical mindset, direct communication style, and subtle sense of humor, Sébastien brings thoughtful energy and a drive for excellence to every team. An entrepreneur at heart, he is always exploring new ideas, especially around artificial intelligence and automation. For him, code is a tool for impact — a playground where rigor, boldness, and the joy of building come together.

Arnaud Vanderschrieck

FullStack Developer

Arnaud is a creative full stack developer who sees every line of code as an opportunity to innovate. In his day to day work at JAK Solutions, he skillfully balances building new features with solving complex bugs, showing remarkable agility. For him, coding is not just about writing instructions, it is a creative process where the elegance of a solution matters just as much as its efficiency.

Driven by curiosity and a strong aesthetic sense, he enjoys adding a visual and intuitive dimension to the projects he works on. His ability to visualize solutions even before implementing them allows him to turn technical challenges into smooth, user friendly experiences.

Administration

Sophia Pratsas

Executive Assistant

With a strong sense of organization and an unwavering commitment to excellence, she ensures the team runs smoothly every day. Her background in entrepreneurship and customer service brings valuable perspective and drive to her role. She combines efficiency with a natural sense of empathy.

Beyond her operational role, she embodies the balance between structure and warmth that defines our culture. Her proactive mindset, reliability, and positive energy make her an essential point of support for both management and the wider team.

Our talents

Mehdi El Mestari

Intern

Mehdi is a curious and level headed web developer, driven by a genuine desire to learn and grow. At JAK Solutions, he approaches each new challenge with calm, method and an open mindset, whether it is discovering new tools or understanding technical problems.

Drawn to adventure and exploration, he enjoys stepping outside his comfort zone, an approach he naturally brings into his work. Hiking, running, travel and off the grid experiences fuel his perseverance and endurance, qualities that shape his journey as a developer and his role within the team.

Victor Castelain

intern

Victor is a final-year management IT student completing his internship at JAK Solutions. Methodical and hardworking, he has a natural ability to ask the right questions, understand the bigger picture, and get up to speed fast, qualities that made him feel like part of the team almost immediately.

At JAK, he is strengthening his skills in .NET and expanding into React, with the goal of contributing to real projects and meaningful challenges. His approach to development mirrors the way he tackles everything else: with patience, structure, and a steady drive to improve.

Outside of work, Victor recharges through rock climbing and running, two disciplines that reflect his mindset well. And if 40 days backpacking across Asia taught him anything, it's that the best way to grow is to embrace the unknown head-on.

Let’s build something exceptional together

We support you. Let’s discuss your challenges and build a solution tailored to your objectives.

Meet JAK
An ambitious crew

Meet our team

Our goal is simple.

  We're on a mission to build award-winning digital products.

In House

Kim Berthonneau

CEO / Solution Architect

Kim plays many roles at JAK Solutions. Usually, he's the first point of contact for prospects and clients, so chances are, your initial interactions will be with him. Blessed with a high degree of empathy, Kim has the unique ability to truly walk in your shoes and understand your needs at a fundamental level. His strong technical background equips him to convert your needs into customized digital solutions that fit your business like a glove.

Kim also has a passion for all activities related to boards. Don't be surprised if you spot him skateboarding down the street, snowboarding down a frosty mountain slope, or kitesurfing over the ocean waves in his free time.

Jon Pauwels

CTO / Lead Developer

Jon is the CTO at JAK Solutions. A true Swiss army knife, he blends strategic vision, team leadership, and technical expertise. He oversees the development team, structures projects, evolves the architecture, and still codes regularly, both in fullstack web and FileMaker development.

Analytical and naturally curious, he enjoys understanding how systems, technical or human, work at a deeper level. He places great value on code clarity, efficient processes, and healthy team dynamics. Outside of work, he plays padel weekly and spent many years playing chess, a game he still enjoys for its complexity and logic.

Andreas Couscouras

COO

An entrepreneur at heart, he joined JAK Solutions, drawn by the team’s quality standards and way of working. With solid experience in building and growing businesses, he now brings his strategic mindset and entrepreneurial vision to support JAK’s expansion.

As COO, he helps structure, organize, and optimize internal processes to drive the company’s sustainable and ambitious growth.

Corentin Grégoire

FullStack Developer

Since joining JAK, Corentin has quickly established himself as a key member of the team. His approach to development is both methodical and thoughtful: he pays close attention to every detail and never settles for anything less than excellence. Always seeking elegant and efficient solutions, he enjoys understanding the “why” behind every line of code and constantly strives to refine his methods.

Throughout various projects, Corentin has demonstrated strong adaptability, continuous technical curiosity, and a genuine commitment to quality work. He approaches each challenge with calm determination, and his high standards help raise the collective level of the team.

Behind his professional rigor lies a curious and passionate mind — someone who loves to learn, explore new technologies, and share his discoveries with others.

José Lopez Fernandez

Web Developer & SEO Specialist

Passionate about the digital world and equipped with strong expertise in web development and SEO, he supports businesses in creating high-performance, visually appealing, and strategically optimized websites that enhance their online visibility. Combining attention to detail, business insight, and creativity, he designs digital experiences that faithfully reflect each brand’s identity while maximizing their impact.

Committed to quality and close collaboration, he favors a results-driven approach where every project becomes an opportunity to create lasting value for his clients.

Dany Vanmuylder

FullStack Developer

Dany is a versatile and determined web/mobile developer who thrives on tackling challenges head-on. Known for his sociable and approachable nature, he brings a unique balance of professionalism and joyful collaboration to every project. His passion for coding goes beyond just work, he views it as a game, always looking for ways to optimize, innovate, and push his limits.

Outside of development, Dany is a competitive chess player with a strategic mindset, and a fan of various board games and video games. His love for these activities mirrors his approach to coding: patient, thoughtful, and always seeking the next move to gain an edge. Whether it's in development or in a game, Dany is someone you can count on to bring his best to the table.

Richi Nieto

Product Designer and Web Developer

Richi is a Product Designer and Web Developer passionate about creating beautiful and intuitive interfaces that seamlessly blend psychology and technology to deliver exceptional user experiences.

With over seven years of experience in a startup studio, he specializes in UX/UI design, branding strategy, and Code/No Code development. He enjoys helping startups grow, enhance their customer experience, and achieve their goals through smart and purposeful design.

A creative problem-solver by nature, he strives to find the perfect balance between best practices and the unique needs of each project.

Sebastien Vandaele

FullStack Developer

Sébastien is a passionate full-stack developer and tech lead who thrives on demanding projects that combine deep technical challenges with strong product vision. Curious and committed, he enjoys both designing robust backend architectures and refining seamless frontend experiences. His approach is driven by a constant pursuit of clarity, efficiency, and purpose — without ever giving in to unnecessary complexity.

Known for his analytical mindset, direct communication style, and subtle sense of humor, Sébastien brings thoughtful energy and a drive for excellence to every team. An entrepreneur at heart, he is always exploring new ideas, especially around artificial intelligence and automation. For him, code is a tool for impact — a playground where rigor, boldness, and the joy of building come together.

Sophia Pratsas

Executive Assistant

With a strong sense of organization and an unwavering commitment to excellence, she ensures the team runs smoothly every day. Her background in entrepreneurship and customer service brings valuable perspective and drive to her role. She combines efficiency with a natural sense of empathy.

Beyond her operational role, she embodies the balance between structure and warmth that defines our culture. Her proactive mindset, reliability, and positive energy make her an essential point of support for both management and the wider team.

Alexandre Van Den Berghe

Intern

Alexandre is a passionate developer intern, always eager to learn and improve. Curious and positive, he approaches every project with enthusiasm and a genuine desire to understand needs in order to achieve the best possible outcome. New challenges don’t intimidate him — they drive him to push his limits and excel.

Trilingual in Dutch, French, and English, Alexandre communicates with ease, fostering effective teamwork and smooth international collaboration. A motorsport enthusiast, he brings a true competitive spirit to everything he does, tackling each challenge with determination and energy.

Arnaud Vanderschrieck

FullStack Developer

Arnaud is a creative full stack developer who sees every line of code as an opportunity to innovate. In his day to day work at JAK Solutions, he skillfully balances building new features with solving complex bugs, showing remarkable agility. For him, coding is not just about writing instructions, it is a creative process where the elegance of a solution matters just as much as its efficiency.

Driven by curiosity and a strong aesthetic sense, he enjoys adding a visual and intuitive dimension to the projects he works on. His ability to visualize solutions even before implementing them allows him to turn technical challenges into smooth, user friendly experiences.

Mehdi El Mestari

Intern

Mehdi is a curious and level headed web developer, driven by a genuine desire to learn and grow. At JAK Solutions, he approaches each new challenge with calm, method and an open mindset, whether it is discovering new tools or understanding technical problems.

Drawn to adventure and exploration, he enjoys stepping outside his comfort zone, an approach he naturally brings into his work. Hiking, running, travel and off the grid experiences fuel his perseverance and endurance, qualities that shape his journey as a developer and his role within the team.

Gil Van Roye

Sales Consultant

Gil is our sales expert at JAK Solutions. Results driven and client focused, he builds long lasting partnerships and delivers tangible business value for every organization he works with. His approach is straightforward: understand the challenges, design the right solutions, and grow together over the long term. A rugby enthusiast, he tackles every project with team spirit, commitment, and a never drop the ball mindset. Passionate about music, he believes the best collaborations, like the best songs, are all about perfect harmony.

Victor Castelain

intern

Victor is a final-year management IT student completing his internship at JAK Solutions. Methodical and hardworking, he has a natural ability to ask the right questions, understand the bigger picture, and get up to speed fast, qualities that made him feel like part of the team almost immediately.

At JAK, he is strengthening his skills in .NET and expanding into React, with the goal of contributing to real projects and meaningful challenges. His approach to development mirrors the way he tackles everything else: with patience, structure, and a steady drive to improve.

Outside of work, Victor recharges through rock climbing and running, two disciplines that reflect his mindset well. And if 40 days backpacking across Asia taught him anything, it's that the best way to grow is to embrace the unknown head-on.

Freelance

Valentina Morciano

UX Designer

Loïc Ponchon

Fullstack developer

Guillaume Morvan

UI Designer / Front end developer

Reem Al Kaisy

UX Designer

Mounaïm El Attabi

Quality Assurance Engineer
Simple, collaborative & convivial

Our Core Values

Simplicity

At JAK Solutions, simplicity guides our work, from coding to interface design and communication. We believe simpler code is more efficient, maintainable, and less error-prone. Our interfaces aim to be intuitive and user-focused, removing unnecessary complexities. Our communication is clear and jargon-free, fostering an open and collaborative environment.

Achieving simplicity requires thoughtful planning to distill complex ideas into their essential elements. This process, while challenging, enhances our work and benefits our clients by making their tech interactions straightforward and hassle-free.

Like an iceberg, the simplicity seen on the surface hides the complexity beneath, a balance we strive for at JAK Solutions.

Collaboration

In our profession, the practice of collaboration with our customers is not just beneficial, but indispensable. It is through this close, cooperative relationship that we are able to fully understand their specific needs and circumstances. This understanding, in turn, allows us to discover and devise unique solutions that are not only effective but also tailored to each individual situation. In this way, we ensure that the services we provide are not generic, but personalized and of the highest quality.

To facilitate this collaboration, we strive to understand each client's needs deeply. This enables us to visualize ideal solutions. Regular communication is then needed to refine these ideas into a final project that precisely meets the client's requirements.

Conviviality

Work holds great significance in our lives. It's about finding joy and fulfillment, embracing each day positively, and valuing the contributions of everyone involved. At JAK Solutions, we cherish every moment, every interaction, and every project, infusing positivity and warmth into all that we do. Our team takes pride in fostering a work environment that promotes enjoyable collaboration and the cultivation of strong, meaningful relationships. We celebrate the process of work and the creation of solutions that bring value to our clients. Our aim is to build not just solutions, but also relationships, creating a work culture where everyone loves what they do and feels a deep sense of accomplishment and satisfaction.

Want to meet us?

Come and meet us.

Meet JAK