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ANGUS UELSMANN

I build secure systemsfast APIsclean backendslasting software

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IamAngusU Germany

About

Backend-first.
Shipped end‑to‑end.

I build secure, layered architectures — from hardened APIs and access-control gateways to full product platforms. I care about clean contracts, predictable state, and code that a future engineer can reason about without needing a guide.

Over the years I’ve shipped monitoring infrastructure, real-time event systems, preservation networks, and emergency alert platforms — each one production-ready from day one.

See the work
40+ Projects shipped
17+ Years building
100% Production-grade
0 Compromises on security & privacy

Stack

Technologies I reach for

Selected work

Things I’ve shipped

01 Compliance · SaaS hinschg‑portal

hinschg‑portal

from $29 / mo

HinSchG-compliant whistleblower SaaS for German companies. Multi-tenant with whitelabel branding, anonymous two-way secure chat, AES-256-GCM encryption, no-log architecture, and EXIF-stripped file uploads — legally compliant in under 5 minutes.

PHPMariaDBAES-256Multi-Tenant
02 Data Integrity · P2P ongrnd

ongrnd

free for providers

Distributed cryptographic verification protocol for private security backups. Every file is simultaneously hashed with SHA-256, SHA-1, MD5, and CRC32 — then cross-referenced across an encrypted P2P mesh. AES-256-GCM, HWID-bound identity, invite-only reputation engine.

RustP2PAES-256-GCMSHA-256
03 SaaS · Booking safegate

safegate

Appointment booking and OTP verification platform for discreet service providers. Clients pay via Stripe and receive a unique 6-digit code — redeemed on arrival with no personal data stored and a neutral bank statement entry. Completely free for providers.

PHPStripeOTPMariaDB
04 SaaS · WMS storagenow24

storagenow24

free – $149 / mo

Real-time warehouse management SaaS with live occupancy heatmaps, AI-assisted slot assignment, and a built-in rental marketplace that turns empty space into revenue. Drag-and-drop floor planner, yard and ramp control, multi-tenant, full audit trail.

PHPMariaDBHeatmapMulti-Tenant
05 Alert System · Push westerwarn

westerwarn

$9.99 one-time

Real-time emergency alert and event platform for the Westerwald region. VAPID Web Push, Leaflet.js live map, Server-Sent Events for instant broadcasts, service worker offline cache, and a lean admin panel. Built to be fast when seconds matter.

PHPMariaDBWeb PushVAPID
06 Tool · Desktop + Web filebeam

filebeam

Drag a file in, scan the QR on your phone — done. FileBeam transfers files peer-to-peer over your local network at full wire speed. No cloud, no account, no file size limits. Windows app with a browser-based receiver for any device.

Node.jsWebSocketQRLAN
07 Tool · Audio audiomatrix

audiomatrix

Windows audio routing engine built in Rust on WASAPI. Route any app to any output, apply a 3-band EQ, compressor, and noise gate per channel, and control everything from a PWA on your phone over LAN. Single .exe, no installer, 1.8 MB.

RustWebSocketPWAWindows
08 AI · Desktop visionsort

visionsort

Stop naming screenshots manually. VisionSort scans a folder, sends each image to a local vision model via Ollama, and proposes descriptive filenames. Review in a clean UI, bulk-approve, undo with one click. 100% local — no uploads, no API keys, no cloud.

PythonOllamaLocal AIWindows
More on GitHub

Contact

Let’s build
something great.

Have a project in mind or want to talk systems? Open to freelance, contracts, and interesting problems.