IT Consulting
Your Partner for
Quality Software Development
Your reliable partner for full-stack development, strategy, and digital innovation—built on clean code and quality.
Cotersus = Code + Tersus (Latin: clean) — Clean code is our foundation
How We Help You
Quality-driven solutions built on clean code principles
IT Consulting & Developer Coaching
We embed within your organization as senior developers and technical coaches—building scalable solutions while mentoring your teams and establishing best practices.
- •Frontend architecture guidance and technical mentorship
- •Hands-on development within Nx monorepos and enterprise applications
- •Mentoring developers and promoting best practices across agile teams
- •Establishing clean code standards and maintainable practices
Website & Web Application Development
We design and build professional websites and web applications that help your business grow—delivering fast, modern, and user-friendly solutions that make the right impression.
- •Modern, responsive design that works perfectly on all devices
- •Fast performance and excellent user experience
- •Accessible and SEO-optimized for maximum reach
- •Built with clean, maintainable code for long-term value
A Clear Plan, No Surprises
Our proven process ensures quality results
Strategy & Analysis
We listen to your goals and analyze the requirements.
Design & Development
We design and build the solution with a focus on quality and feedback.
Delivery & Support
After a thorough testing phase, we launch the project and remain available for support.
Our Core Technologies
We use modern, robust, and scalable technologies to guarantee the quality of your project.
Featured Projects
A selection of projects we've worked on and helped realize
Ward Pellegrims • 2025
Analysis • Design • Full-stack Development
Learn to swim crawl or improve your technique under expert guidance from Pieter Timmers and Ward Pellegrims.
Ward Pellegrims • 2025
Analysis • Design • Full-stack Development
Professional coaching platform for elite swimming and triathlon athletes with online training programs, technique sessions, and payment integration.
Analysis • Design • Full-stack Development
Foundation website supporting children with rare genetic disorders, featuring documentary integration, educational resources, and fundraising initiatives.
Frontend Development
The Belgian platform for the online incorporation, modification, and dissolution of your company, association, or foundation.
Riff agency • 2019
Frontend Development
Modern football agency platform combining legal expertise, international networking, and performance coaching with transparent fee structures.
Riff agency • 2019
Frontend Development
Modern website update for Belgian law firm emphasizing professional branding and user experience
Frontend Development
The statutory database that contains all versions of the articles of association of legal entities, resulting from notarial acts executed in Belgium, from the incorporation of the legal entity up to the very last update of the articles of association.
Riff agency • 2017
Frontend Development
Jazz magazine, community site, and music discovery platform where users can contribute content and discover their next favorite artist or album.
Riff agency • 2016
Frontend Development
Charitable fund website managed by King Baudouin Foundation, supporting cancer patients in Belgium, heritage preservation, and global health initiatives.
ZVC Goldgetters • 2012
Analysis • Design • Full-stack Development
Official website for ZVC Goldgetters futsal team, featuring team information, match schedules, player profiles, statistics, and more.