A Margin Note Five Years Later
A 2021 book review contained an unanswered question. Two research papers later, the question is still largely unanswered — and the EdTech industry is still not asking it.
SF
Posts by Sayed Hamid Fatimi
Page 3 of 17 | Posts 21-30 of 162 posts
Variable Income, Fixed Expenses
When your income varies, conventional budgeting answers a question you are not asking. The leverage isn't on the income side — it never was.
The Gold is in the Structure
Valeon has been rebuilt from the ground up and VocaSync has matured significantly — same surfaces, different beasts underneath. A full account of what shipped, what changed architecturally, and what's coming next.
The Tangible Cost of Dead Miles
Two platforms, nearly identical daily gross income — and completely different economics once you look beneath the surface. What gig workers measure and what they should measure are rarely the same thing.
The Contract Nobody Signed
Every institution that claims to serve the public is invoking an obligation it never formally accepted. This essay examines the implied social contract — the unwritten expectations that hold society together, how they are systematically hollowed out, and why the violation is so difficult to name.
Secured Debt, What Is It?
Not all debt is created equal. The difference between secured and unsecured debt determines what a lender can take from you when things go wrong — and most people don't think about it until it's too late.
What a Platform Owes Itself
"A core rewrite, a lifecycle state machine, CI orchestration, observability, an internal operator dashboard with audit trail, and documentation for engineers not yet hired — the internal work that decides whether the external promises can be kept."
What a Platform Owes
"Organisations and RBAC, compute sleep cycles, a custom support system, and paper trading — four updates that don't add to the exchange count, but change what it means to actually operate on the platform."
Custom Domain Email, Part 2: Sending
Cloudflare Email Routing handles the receiving half. This post covers sending — Gmail "Send As" for human outbound, Resend for programmatic.
SFSayed Hamid Fatimi8 min readLate to the Game, Changed by It
After discovering Claude Code and integrating it into a solo 82,000-line trading platform, the real lesson wasn't about speed — it was about context: "in your head, in the model's window, and in the codebase itself."
SFSayed Hamid Fatimi12 min read