Blog
Field notes from building fintech and SaaS platforms — mostly practical, occasionally opinionated.
27 Sep, 2026 · 9 min read
A short, diagram-led note on using AI coding tools like Claude Code and Copilot to speed up fintech system design and delivery — where they help, where they've caused real produ...
26 Sep, 2026 · 10 min read
A short, diagram-led primer on sales tax for engineers wiring up Avalara — nexus, jurisdictions, tax codes, exemption certificates, the calculate-commit-file lifecycle, real fai...
23 Sep, 2026 · 15 min read
A short, diagram-led deep-dive on why duplicate transactions happen, how timeouts and retries turn one payment into two, and how to design idempotency keys properly — with real ...
22 Sep, 2026 · 9 min read
A short, diagram-led note on Cross-Site Scripting. What XSS actually is, why unescaped output is the root cause, the three flavours of the attack with real payloads, and the sma...
21 Sep, 2026 · 17 min read
Laravel's core functionalities explained one by one, how each compares to the equivalent in other modern frameworks, why it's far more than a backend framework — frontend, mobil...
18 Sep, 2026 · 11 min read
A short, diagram-heavy primer on the finance and payment concepts every fintech engineer needs — money movement, the payment lifecycle, double-entry ledgers, the laws that shape...
17 Sep, 2026 · 9 min read
Monolithic Architecture in plain terms: what "one deployable unit" really means, and one real feature — placing an order — built the monolith way with Laravel and Vue.js. A 10–1...
15 Sep, 2026 · 8 min read
Onion Architecture in plain terms: the rings, the dependency rule, and one real feature — placing an order — built the onion way in Node.js. A 10–15 minute read.
14 Sep, 2026 · 8 min read
Hexagonal Architecture (Ports & Adapters) in plain terms: the hexagon, ports vs adapters, and one real feature — registering a user — built the hexagonal way in Node.js. A 10–15...
9 Sep, 2026 · 9 min read
Clean Architecture in plain terms: the concentric circles, the single dependency rule that makes them work, and one real feature — placing an order in a small e-commerce app — b...
7 Sep, 2026 · 8 min read
A short, diagram-led note on the single most famous web vulnerability. What SQL injection actually is, why string-built queries are the root cause, how a real attack unfolds ste...
26 Aug, 2026 · 21 min read
You type-hint an interface in a constructor, and a fully wired object shows up. No `new`, no factory call, nothing that looks like plumbing. This is not magic — it's a container...
26 Aug, 2026 · 18 min read
The code that quietly fires a hundred database queries — and how understanding Eloquent's loading model turns a performance disaster into a two-query operation. A complete guide...
25 Aug, 2026 · 19 min read
A complete guide to understanding online payment flows and building a clean, extensible payment integration in Laravel — covering architecture, webhooks, security, database desi...
20 Aug, 2026 · 14 min read
SOLID is not a checklist — it's a way of thinking about code that makes systems easier to change, test, and extend. This guide walks through every principle with real PHP and La...
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