Full-stack development · Bocholt & Dortmund
I build software that replaces patchwork systems: mobile apps for the warehouse, dashboards for ERP data and web apps instead of Excel macros. Every project on this page runs live on my own infrastructure.
$ git push origin main ✓ astro check types ok ✓ astro build static ✓ playwright 11 tests ✓ docker build web:7280efd ✓ traefik tls · hsts ● live 14 Oct 2026
01Solutions
These scenarios come straight from conversations with machine-building companies. Each one has a demo.
Technicians fill in paper time sheets, the office types them up – days later, with errors. There is often no signal in the hall.
Report on the tablet, works offline, digital signature. Once approved, the voucher lands in the ERP automatically.
A desktop PC on a trolley, a generator for power – that is how parts get scanned and photographed in the warehouse.
A private app on a phone or handheld scanner: scan, snap, done. Works offline.
Customers hand over databases and exports – analysed by hand in Excel, every single week.
Automated import, clean data models and dashboards that refresh themselves.
VBA macros, Access databases and scripts only one person still understands – who retires soon.
Step-by-step replacement with maintainable, tested software – no big bang, no downtime.
Downtime is noticed when someone walks by. Metrics arrive at the end of the month.
Capture machine data live, alerts on your phone, OEE at a glance.
02Projects
Every subdomain is a standalone project with its own stack – frontend to database, containerised and shipped automatically.
Technicians record time, material, photos and the customer signature on a tablet – even offline. The office approves, the voucher goes to the ERP, the PDF to the DMS. Architecture: frontend · backend-for-frontend · backend.
Solves: Reports on paper
Import customer data from ERP exports (CSV, Excel, SQL dumps), clean it, and turn it into dashboards for stock turnover, order backlog and delivery reliability.
Solves: Data in the ERP, insight nowhere
Scan, photograph and book machine parts from a phone – even without Wi-Fi in the hall. Syncs automatically once the connection is back.
Solves: The PC on wheels
A typical macro tool (VBA-based costing sheet) migrated step by step into a multi-user web app – with a before/after comparison.
Solves: Frankenstein architecture
Simulated machines stream telemetry over MQTT. Live dashboard with OEE, downtime reasons and real-time alerts.
Solves: Machines without a voice
Cross-platform pen-pal app with sign-up, profiles, search, direct messages and monetization. Demo video and APK available.
Shows live which services of this infrastructure are running – the operations view behind every subdomain.
03Approach
AI agents write a lot of code today. What makes the difference is specification, architecture, tests and review – and that is exactly my job.
Listen on site, map the process, capture requirements as a testable spec.
Settle architecture, data model and interfaces before the first line is written.
Implement with AI agents in small, reviewable steps. Every change is read.
Automated tests, self-checks and code review are mandatory, not optional.
Containers, automatic HTTPS, reproducible builds, monitoring.
Case study · C# · BepInEx · Harmony
A mod for the game “Skul: The Hero Slayer”, built entirely with AI agents. It hooks into an undocumented third-party Unity game through Harmony patches, exposes hidden game mechanics and survives game updates.
v0.12.1 · GPL-3.0 · live data at build time
04Lifecycle
This site goes through the same lifecycle as every client project. The values below come from the current build.
No cookies, no tracking, no third-party fonts.
05Résumé
Leue & Nill GmbH · Dortmund
Kaasa Solution GmbH
Lehrstuhl 1 Informatik, TU Dortmund · Dortmund
TU Dortmund
Euregio Gymnasium Bocholt
06Contact
Tell me where it hurts – the warehouse, the ERP or the Excel file nobody dares to touch. The first conversation is free.
umut.aslan99@outlook.de