Harley Lafeber
Medior Software Engineer
.NET - Systems Integration - Cloud - Game Development
Professional Profile
Systems-oriented software engineer with deep experience in C#/.NET. Hands-on ownership of multiple systems across the full stack (server-side, mobile, cloud, hardware, infrastructure, integrations). Enjoy diving into unfamiliar, messy domains, figuring out what you need to learn, and taking vague requirements and turning them into systems.
Most comfortable in roles that involve a mix of engineering, research, and delivery.
Core Skills
- C#, .NET, ASP.NET, Web API, MVC, WPF, Blazor
- Flutter, Dart, Angular, TypeScript, JavaScript, Java, PHP
- Azure, Service Bus, Functions, DevOps, Docker, Cloudflare
- SQL Server, Redis, MongoDB, Cosmos DB
- Smart Cards, APDU, NFC, EMV, BLE, Systems Integration
Education
- Avans University of Applied Sciences, BredaBAS Informatica / Software Engineering
- Konkuk University, South KoreaExchange Program, Computer Science & Engineering
- Techniek College/Albeda, RotterdamMBO 4 Application Development
- Albeda College, RotterdamMBO 3/4 System & Network Administration
Certifications
- Microsoft AZ-900 - Azure Fundamentals
- Cisco Small Network certification
- Intel Network Builders University certification
Experience
Sentinel IT BV
- Own complex production work across fintech, smart cards, mobile apps, APIs, cloud and third-party integrations.
- Sole author of a cross-platform smart-card platform (C#, C++, TypeScript/JS) for secure web-based card reading and authentication.
- Product lead and sole maintainer of a Flutter banking app; implemented EMV/NFC card reading, ID/passport scanning, KYC image encryption and CI/CD ownership.
- Re-architected registration from 45+ minutes to ~5 seconds perceived completion using Azure Service Bus, Functions and event-driven processing.
- Designed PSD2/Open Banking integration bridging internal systems to SaltEdge and built a Cloudflare Workers status page for operational visibility.
Nekrova
- Founded Nekrova from a volunteer game-development project and formalized contributor/IP agreements as the team grew.
- Led The Phoenix Project, then pivoted the organization toward preservation and live operation of Dragon’s Prophet after official shutdown.
- Operate and modernize discontinued MMO infrastructure, tools, websites and supporting services.
- Coordinate volunteer contributors across development, assets, live ops and community support.
Alternate
- Built internal tools, warehouse PDA features and secure logistics systems.
- Designed a BLE-based warehouse positioning system on Android PDAs that reduced affected picking workflows from ~10-20 minutes to 5-10 minutes.
- Developed a C# WPF TCP messaging app for internal communication.
Dutch Game Studio
- Sole programmer on Dutch Biker; learned Unity and C# on the job and delivered a playable proof of concept.
- Implemented gameplay, physics, power-ups, combo logic, API communication and a scoreboard backend.
Pro Unit ICT
- Learned PHP and WordPress on the job and contributed to frontend, backend and server setup for client websites.
Albeda College
- Maintained networks, servers, workstations and cabling, forming the early systems foundation for later software work.
Selected Projects
Anubis
Discord assistant for learning Dutch, using Azure Speech and multiple STT/TTS engines to practice pronunciation and A1 speaking skills.
Allergy Check
Open-source browser extension that scans product pages for rare allergens, making hidden risky ingredients easier to spot.
VRChat Worlds
Built social / interactive worlds including Know Your Friends in Space (111k+ visitors, 5k+ favorites), with custom gameplay logic, spatial audio and optimization work.