Koen te Brinke — Full Stack PHP Developer

Selected work

Client projects that show range, depth and execution.

A selection of platforms, tools and products I designed, developed and maintained. From loyalty systems and assessment engines to industry databases and business dashboards.

Case 01 · Loyalty Platform / Webshop / Integrations

Hallmark Verwenkaart, full loyalty platform with webshop, giftcards, integrations and automated order flows.

A full-scale loyalty platform for Hallmark, built around digital and physical gift cards, combining webshop flows, voucher systems and real-time integrations into one cohesive system.

The platform handles the complete flow from purchase to fulfillment: payments, stock, supplier routing and redemption. Multiple external systems are connected, enabling automated processing and reliable data exchange.

I was responsible for the full stack, from UX and frontend to backend architecture, integrations and long-term maintenance. The system was designed to handle complex data flows while remaining scalable and maintainable.

Full webshop with gift card flows and redemption logic
POS / cash register integrations
Supplier integrations with automated order processing
Stock management and synchronization
Financial reporting and transaction flows
Bidirectional integrations (REST, SOAP, JSON, CSV)
Custom CMS and backoffice dashboards
Design, development and long-term maintenance

Case 02 · Assessment Platform / Learning / API Integration

HeroScan, interactive assessment platform with dynamic questionnaires and personalized learning outcomes.

An interactive assessment platform that generates personalized insights and learning paths based on dynamic questionnaires and scoring logic.

Users complete tests that adapt to their input, after which the system calculates outcomes and maps them to relevant courses via API integrations with an external training database.

I built the full platform including the questionnaire engine, scoring system, API integrations and CMS. The system is flexible, allowing non-technical users to create and manage new assessments.

Dynamic questionnaire engine with multiple question types
Support for multiple choice, multi-select and value sliders
Personalized results with scoring and weighted logic
API integration with course and training database
Automated mapping from results to learning content
Custom CMS for managing tests, questions and outcomes
Scalable architecture for different use cases
Full design, frontend and backend development

Case 03 · Platform / Database / Community / E-commerce

Materialliance, data-driven platform for the knitting industry, combining databases, community and product creation.

A data-driven platform for the knitting industry, combining multiple databases into one structured system for machines, yarns, fabrics and product development.

The platform connects data, community and creation: users can explore materials, build concepts and collaborate through messaging and timelines, with a direct path to production.

I worked on structuring complex data models and building a scalable platform that merges multiple sources into a clear and usable system, including webshop integration and product workflows.

Centralization of 5 separate industry databases
Advanced data models: machines, yarns, fabrics, stitches
Creator tool for moodboards and product concepts
Community features: messaging & timeline
Integrated webshop and product pipeline
From concept → submission → physical product

Case 04 · Platform / Dashboard / Laravel

Devidend Partnerview, marketing platform for lead management, performance tracking and financial insights.

A marketing and lead management platform that provides insight into performance, conversions and financial results for internal teams and partners.

The system tracks leads, handles offers and calculates bonuses, while dashboards provide real-time insights into business performance and daily operations.

I worked on the redesign and further development of the platform, improving usability, structure and clarity while maintaining performance and scalability.

Lead management and tracking system
Offer generation and workflow handling
Statistics dashboards and performance insights
Bonus calculations and financial overviews
Role-based access for marketers and management
UI/UX restyling and structural improvements

API Development & Integrations

Extensive experience building and maintaining integrations between platforms, including payment providers, POS systems, supplier APIs, reporting pipelines and custom data flows between external systems.

Custom Internal Tools & Admin UX

Backoffice environments, management dashboards, data entry interfaces and process automation built with clarity, maintainability and real-world daily use in mind.

Own products

Not just client work. I build my own systems, products and experiments.

These projects show how I think beyond client requirements. From game development to Bitcoin-native concepts, built from scratch, tested in the real world and continuously improved.

Own Product · Game / Bitcoin / Arcade

Bitcoin Blitz, arcade shooter with Lightning payments and custom game engine.

Bitcoin Blitz is a fully custom-built HTML5 arcade shooter combining fast gameplay, cyberpunk visuals and real Bitcoin Lightning payments. Designed to run both in the browser and on a physical arcade cabinet, it blends game design, system architecture and payment flows into one experience.

The game uses a custom state-driven engine, optimized rendering and layered visual systems including EPPO.EXE hacker-style overlays. Payments are directly integrated into gameplay, allowing players to buy credits and continue runs seamlessly.

Custom JavaScript game engine (Canvas)
State machine architecture & performance tuning
Lightning payment integration (credits system)
Arcade cabinet + kiosk deployment (Linux)
Signature attacks, AI, bosses and effects systems
Custom visual identity (EPPO.EXE interface)

Own Product · Bitcoin / Community / Platform

Noderunners, Bitcoin-native platform focused on sovereignty, nodes and proof-of-work.

Noderunners is a concept and platform built around Bitcoin fundamentals: running your own node, decentralization and proof-of-work. It combines product thinking, branding and community into a clear and recognizable ecosystem.

The project explores how complex technical concepts can be translated into accessible interfaces and engaging user experiences. It serves as both a live platform and a foundation for future Bitcoin-native tools and applications.

Concept → design → full build
Bitcoin-native product thinking
Strong visual identity and tone of voice
Community-driven platform direction
Scalable foundation for future expansion

Expertise

From polished frontend to reliable backend logic.

A focused selection of skills used to build reliable, real-world systems.

01

Frontend & UI

Photoshop roots, responsive layouts, Bootstrap, component thinking, clean markup and user-focused flows.

02

PHP Development

Custom platforms, CodeIgniter 4, business logic, maintainable architecture, admin tooling and backend features.

03

APIs & Integrations

Mollie, Stripe, cash register integrations, stock systems, accounting reports, SOAP services and REST APIs.

04

Custom CMS

Tailored management systems that fit the process instead of forcing the business into a generic template.

Core stack

About

Started as a webdesigner. Grew into a full stack builder.

I’ve been building for the web since 2008. I started on the visual side: webdesign, Photoshop, HTML and CSS. Over the years that evolved into full stack PHP development, custom CMS work, integrations and business-critical systems.

I like projects where frontend, backend and real-world processes come together. Clean UI still matters to me, but so do maintainability, speed and getting the logic right.

One of my strengths is analytical problem solving: breaking down technical challenges, spotting where complexity lives and translating that into practical solutions that actually work.

2008

Started in webdesign and frontend

Photoshop comps, HTML/CSS builds, strong eye for layout and structure.

2010+

Moved into dynamic websites and CMS work

More backend responsibility, templating, data models and full project implementation.

2014+

Full stack PHP development

Custom business platforms, integrations, webshops, dashboards and reporting logic.

Now

Senior builder mindset

Client work plus own products such as a game and Bitcoin-related projects.

Approach

Direct, practical and focused on working software.

A short section like this helps clients understand what it feels like to work with you.

01

Analyze the problem

I start by breaking down the real process: users, data, actions, bottlenecks and where complexity actually lives.

02

Design for use

UI should look sharp, but more importantly it should support the workflow and reduce friction.

03

Build solid logic

Backend, database, integrations and business rules are implemented with maintainability in mind.

04

Solve with structure

Backend, database, integrations and business rules are built in a way that keeps systems clear, maintainable and reliable.

“No overengineering. No unnecessary layers. Just clear thinking and software that works.”

— Koen te Brinke

Contact

Let’s build something that actually works.

Working on a platform, webshop or integration that needs to be reliable and scalable? I help businesses turn complex ideas into clear, maintainable systems.

Email

Location Netherlands · remote / hybrid / on-site by arrangement

LinkedIn linkedin.com/in/koen-te-brinke