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Angus Uelsmann — Secure Backend & Full-Stack Engineer
Open to conversations

ANGUS UELSMANN

I build secure systemsfast APIsclean backendslasting software

See my work Get in touch
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 · Whistleblowing hinschg‑portal

hinschg‑portal

Self-hosted SaaS portal for internal whistleblower reporting under the German HinSchG. Multi-tenant with whitelabel branding, AES-256 encryption, and a full no-log architecture.

PHPMariaDBAES-256Multi-Tenant
02 Network · Community ongrnd

ongrnd

A distributed game preservation network for archiving, cataloging, and discovering retro software. Community-driven with contributor roles, upload pipelines, and a public API.

PHPMariaDBnginxREST API
03 Security · Infrastructure safegate

safegate

Zero-trust access control gateway with IP allowlists, rate limiting, challenge/response flows, and comprehensive request logging.

PHPnginxMariaDBZero-Trust
04 SaaS · Storage storagenow24

storagenow24

Dynamic storage unit booking platform with real-time availability, contract management, online payments, and a multi-location operator dashboard.

PHPMariaDBPaymentsSaaS
05 Alert System · Push westerwarn

westerwarn

Regional emergency alert platform with Web Push notifications (VAPID), geo-targeted broadcasts, escalation trees, and a zero-dependency admin panel.

PHPMariaDBWeb PushVAPID
06 Tool · Desktop + Web filebeam

filebeam

Instant local file transfer between PC and phone via QR code. No cloud, no cables, no file size limits — everything stays on your network. Desktop app with a browser-based receiver.

Node.jsWebSocketQRLAN
07 Tool · Audio audiomatrix

audiomatrix

Windows audio routing tool written in Rust. Per-app volume, cross-app routing, 3-band EQ, compressor, noise gate, profile auto-switching, and a PWA remote dashboard over LAN.

RustWebSocketPWAWindows
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.