Software Developer — Glen Cove, New York

John Brandt

Developer Team Lead · Saberin Data Platform

I build .NET backends and AI systems that hold up in production.

See the work RésuméPDF

Fig. 1Me, unflattering and real

Selected Work

four things I actually finished enough to show you

01 / 05

001

Screenshot — spectrum + clip list

RadioHub

Live SDR receiver & auto-clip library

Problem: I volunteer on the response side and wanted a searchable record of the county dispatch channel. Scanners give you audio in the moment and nothing afterward.

Solution: One I/Q stream from rtl_tcp feeds spectrum, live audio, and recording in-process — an RTL-SDR allows one owning process, so shelling out per feature was never going to work. Squelch gates on pre-demodulation RSSI rather than audio RMS, because FM noise is loud and carrier is not.

Stack: .NET 9Minimal APISignalREF CoreReactD3Framer Motion

002

Chart — tok/s vs baseline

Expert Prefetch Cache

llama.cpp fork · MoE inference

Problem: Running mixture-of-experts models on a single Tesla P40 means most experts live in system RAM. Every miss is a PCIe stall, and the stalls dominate throughput.

Solution: A speculative prefetch layer that predicts the next token's expert set from routing history and pulls those weights across the bus early. Tensor-level offload is tuned per layer rather than by a blanket flag.

Stack: C++CUDAllama.cppDebian LXC

003

Gameplay capture — storm cell

Drift

Last-boat-afloat multiplayer

Problem: Browser multiplayer usually means either a thin toy or a 40MB download. I wanted physics-driven boats and procedural terrain that load in a tab.

Solution: Islands generate from a seed on both client and server so the world never ships over the wire. Storm cells are local, not global, which keeps state small and makes the map feel alive instead of scripted.

Stack: three.jsTypeScriptWebSocketsNode

004

Lobby browser UI

Unfit For Print

Unreal Engine party card game

Problem: Party games die when getting six friends into the same room takes six minutes.

Solution: Short lobby codes over Steam sessions, plus a public browser for people with no friends currently available. A separate Labs mode ships experimental decks without touching the stable card pool.

Stack: Unreal EngineC++Steam Online Subsystem

Technical Skills

the honest list, not the keyword soup

02 / 05

Languages

C#
TypeScript / JavaScript
SQL
C++
Python

Frameworks

ASP.NET Core
Entity Framework Core
React / Next.js
SignalR
Semantic Kernel
three.js / D3

Data

SQL Server
PostgreSQL
SQLite
Redis
RabbitMQ
sqlite-vec / Lucene.NET

Platform & Tools

Azure (Container Apps, Key Vault)
Entra ID / MSAL / OBO
Docker
Azure DevOps CI/CD
AWS (Route 53, CloudFront)
YARP

Colophon

big word. means “about me.” I kept it because it looks expensive.

03 / 05

Photo — desk / rack / antenna

Fig. 2 — the homelab, mid-argument

I build the parts of software nobody sees, then spend an unreasonable amount of time on the parts everybody does.

Day job: leading a small team on an agentic AI platform. .NET services, Semantic Kernel, MCP tooling, Entra ID auth flows, and the unglamorous plumbing that decides whether any of it survives contact with a real company.

My philosophy is boring on purpose. Find the constraint that actually binds — one dongle, one GPU, one team — and design around it honestly instead of pretending it isn’t there. Most architectural decisions I’m proud of started as an admission that something wouldn’t scale the way I first drew it.

Nights are radio and rendering. I run large models on hardware that has no business running them, and keep an SDR pointed at the county dispatch channel because I volunteer on the response side and wanted to see what a call looks like before it’s a call.

Interested in backend and platform roles where the AI part is a component, not the pitch.

Photography

I fly the drone far more often than I edit the footage.

04 / 05

Drone — coastline

Fig. 3North shore, low tide

Drone — top-down

Fig. 4Interchange, straight down

Drone — storm front

Fig. 5Weather doing the work

Ground — road trip

Fig. 6Route 66, somewhere in the middle

Ground — antenna

Fig. 7The antenna that started it

Ground — rack at night

Fig. 8Homelab, 2am, fine

Contact

I answer email faster than LinkedIn. Everyone does.

05 / 05

Say hello.

Open to backend and platform work, and always up for talking about radio, inference, or why your build is slow.

hello@example.com