PHP is my primary language. I started a long time ago with PHP 3 and I'm now proficient up to PHP 8.2.
I specialize in Laravel development.
API / OAuth2.0 & SSO/ Laravel / PHPUnit
Hello, my name is
Jérémy Dillenbourg
I am Backend software engineer (PHP)
With more than 12 years of professional experience (and 23+ as a passionate), I'm now focused on developing products following the industry's best practice of code quality.
I'm experienced in producing quality code but also isolating legacy to make it sustainable.
I'm Belgian and speak French, working mostly in English with international teams.
- 12 +Years of Experience
- 2M+lines of Code
Software
What do you need?
my Services
Services
Professional Skills
Hard & soft skills
Coding in PHP
Software Craftsmanship
SOLID principles and design patterns lead me to the general principle of clean architecture.
- Domain-Driven Design (DDD)
- Test-Driven Development (TDD)
- Command and Query Responsibility Segregation (CQRS)
- Hexagonal Architecture
Database
- MySQL (MariaDB)
- Redis
- Elasticsearch / Typesense / Algolia
DevOps
- Setting up tools to increase the reliability and frequency of release.
- Using CI/CD pipeline, monitoring tools, and the right server setup (AWS)
- Github (Action), linter, and static analyzer such as PHPCSFixer, PhpStan, Deptrac
- Monitoring tools Cloudwatch (AWS), Sentry, Flare, OhDear, Papertrail
Legacy system modernization
I'm experienced in working with and improving legacy codebases — isolating, refactoring, and progressively modernizing them without stopping the business.
DDD / Strangler Fig / Incremental refactoring
AI-assisted development
I leverage AI tools to accelerate development while keeping quality and safety at the forefront — using them for code generation, review, and documentation, always with critical oversight.
GitHub Copilot / Code review / Safe iteration
Processes
Working with Agile/Scrum pragmatically to suit your needs. Using small iterations allows us to keep the scope under control and get early feedback. In the end, that allows delivering a stable product and keeping your budget aligned.
Pair coding & Sharing knowledge
Pair programming enables faster development, fewer bugs, and well-thought-out code architecture.
Documenting and sharing knowledge about the code, but also about coding in general level up the entire team.
Check my blog post on Medium
Skills
Companies I've worked with
Cinexpert
FamousGrey
Eplaque
Grenier Du Geek
Giftify
Skaleet
Cinexpert
FamousGrey
Eplaque
Grenier Du Geek
Giftify
Skaleet
Cinexpert
FamousGrey
Clients
Resume
My most relevant work experiences
You can review my professional journey here, from my beginnings in 2003 to my career start in 2014 and through to the present.
Aside from that, I work as a freelancer through my own company: Casper Development. I'm available for freelance projects and consulting engagements.
Aside from that, I work as a freelancer through my own company: Casper Development. I'm available for freelance projects and consulting engagements.
(Freelance) Backend software engineer
Giftify
2025 - Present
Giftify provides gift cards for shopping centers, mostly in Europe and EMEA. I'm working on adding new features but also maintaining and modernizing the existing code base.
(Freelance) BaaS: Senior software engineer
Skaleet
2023 - 04/2025
Skaleet is a Core Banking platform providing white-label banking solutions for new banks and emerging markets. • Working on a high-availability SaaS Core Banking Platform used across EMEA. • Improving core technical infrastructure and optimizing performance. • Ensuring security and maintainability of banking solutions (ISO 27001 compliance). • Implementing clean code principles and best practices in PHP development. • Improving scalability (performance, stateless)
SaaS: Senior software engineer
BePark & Izix
2019 - 2023
Bepark is a parking operator managing user subscriptions (B2C) and allowing them to open gates. Izix evolved into a parking management SaaS allowing B2B companies to manage and optimize their parking lots. I helped move from a POC built quickly to a sustainable code (DDD, Hexagonal architecture, good CI/CD,...) able to handle the future of the product. As it operates gates, it has to be reliable and failure tolerant. With a strong growth, scalability was also a real challenge (Load, database, ...).
Agency: Backend PHP developer
BBDO Belgium
2018 - 2019
Taking care of campaign websites for accounts like Carrefour, Lidl, Total, Atos, ...
Agency: Web developer
FamousGrey
2016 - 2018
Taking care of campaign websites (& chatbot) for accounts like Volvo, Nmbs, Maes, WWF, ...
Agency: Lead Web developer
YouOnWeb
2014 - 2016
Working for various accounts, handling the process from A to Z and leading the team. One of these accounts was eplaque.fr, which I still work with to this day.
The origin: Passionate Web developer
2003 - 2014
I was 13 in 2003 when I started building websites. It stayed a passion for a long time until I turned it into a profession. The interesting skills that came out of this: Working with passion, self-learning, fast learner
History
Contact Me
Let’s Talk About You
Address
Gembloux, Belgium
Freelance
Available for project or long mission
Email
freelance@casper-development.be
Contact Me