Operating System Concepts — My Notes
The whole OS course distilled: processes, scheduling, memory, file systems and concurrency, with the diagrams I wish I'd had.
PDF · 128 pp · intermediate
Coming soon · releasing in ~1.5 months
Digital field guides & project builds
Everything here is written the way I'd want to learn it — traced from first principles to working hardware and software. Buy once, download instantly, keep forever.
I believe knowledge should be free — and most of what I make, the articles and build write-ups, is. These guides are the small exception. The modest price on each is really just a token for the hours behind it: enough to lift the financial pressure that would otherwise pull at my focus, so I can keep loving the work and put it into what truly matters.
The guides below are all work in progress — once finished, checkout opens the moment each one ships.
The whole OS course distilled: processes, scheduling, memory, file systems and concurrency, with the diagrams I wish I'd had.
Write a tiny relational database in C from scratch — pager, B-tree, SQL-ish parser and a REPL — one commit at a time.
The 15 patterns that cover almost every interview question — taught as recognisable shapes, not 400 random problems.
Stocks, flows, feedback and delays — the mental models that let you see why complex systems behave the way they do.
HTTP, REST, auth, webhooks and rate limits explained until they click — then you design and ship one yourself.
The exact stack behind this site: static front end, Stripe checkout, watermarked downloads and a VPS that survives traffic.
Threads, warps, memory hierarchy and the kernels behind fast deep learning — write code that actually saturates the GPU.
From a single neuron to a working transformer and a deployed model — every layer of the stack, built and explained.
Learn ROS 2 by building a scale self-driving car: nodes, topics, perception, path planning and control, sim to hardware.
A complete quadcopter build — frame, motors, ESCs, flight controller and PID tuning — until it holds a stable hover.
Demystify radio: frequency, modulation, antennas and SDR — capture and decode real signals out of thin air.
Flash, RAM, the stack, the heap and the linker script — finally understand where your variables actually live.
Build a connected device end to end: sensor → ESP32 → MQTT → cloud → live dashboard, with OTA updates and security.
The command-line toolkit for ethical hacking and CTFs — recon, scanning and enumeration, explained command by command.
Done-for-you · custom build
For small-business owners and anyone who wants a real digital presence. I build the whole thing from scratch — front end and back end — and deploy it in a Docker container on your VPS. No templates: I listen closely to what you actually need, build to it, then hand it over so you can run it yourself.
We talk through what you actually need. Then I decide whether it’s a project I can fully commit to — no charge, no obligation.
Front end to back end, deployed on your VPS. We meet on Zoom every fortnight (4–6 calls) to check direction and fold in your changes.
Your satisfaction is the whole point, so I walk you through the entire build and show you how to run and update every part yourself.
Hands-on support to make sure everything’s working and you’re fully comfortable taking the wheel.