Aligning NHI Governance With Financial Services Regulatory Expectations
Aligning NHI Governance With Financial Services Regulatory Expectations Explore how NHI governance, secrets management, and risk framing support regul…
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Translating a product catalog with an LLM: cache keys and guard rails
The first version of an LLM catalog translation pipeline usually works and is still wrong. It re-translates fields nobody touched, and it happily publ…
AI in fintech: use cases that work in production
Why fintech is a different environment Financial services applications have accuracy and explainability requirements that most other AI contexts do no…
What Financial Services Taught Me About Saying No
Financial services has a reputation among engineers: it's the place where velocity goes to die. Ask anyone who shipped software at a startup and then …
What Durable Actually Means for Money-Critical Code
Working on systems that move real money changes what "saved to the database" is allowed to mean. A row existing in Postgres is not the same claim as "…
The Quiet Risk in How Most Banks Store Customer Documents, and How NestJS Handles It Properly
A compliance officer at a bank was preparing for an upcoming audit when she asked a question nobody on the engineering team had a clean answer to. Eve…
A Bank Wanted to Use AI to Approve Loans Faster, Here Is What I Would Build Around It in NestJS
A loan officer at a small digital bank was excited about the new model the data team had built. It could score a loan application in under a second, b…
The First Question I Would Ask a Bank Before Using NestJS to Make Sure Their Money Is Always Accounted For
A finance officer at a mid sized bank was closing out the month when the numbers refused to line up. Customer accounts held a few cents more, in total…
I built an AI-first bank statement converter. The one rule that stopped it lying to me.
When I started building StatementDecoder , I thought the difficult part would be reading bank statements. It wasn't. Reading them turned out to be rel…
Open Banking APIs Explained: What PSD2 Compliance Actually Requires From Your Engineering Team
Open Banking APIs Explained: What PSD2 Compliance Actually Requires From Your Engineering Team Every fintech founder we talk to eventually says some v…
Building a Production AI Pipeline for a UK FinTech Client at Tittri — What Actually Happened
After five years of shipping features at Tittri, the team gave me a piece of feedback that stung a little: I was good, but I only ever built what I wa…
Reversal Architecture in Distributed Financial Systems: Compensation, Liability, and Irreversible Side Effects
Abstract Distributed financial systems frequently treat reversal as a secondary state attached to an otherwise completed transaction. A payment succee…
Money Doesn't Move. Information Does.
One of the biggest misconceptions about international payments is that money travels across borders. It usually doesn't. When someone sends $100 from …
A founder once asked me why refunds kept disappearing, here is what NestJS was actually doing
A founder once messaged me with a problem that sounded almost too simple to be real. Customers were saying they never received their refund. Support w…
Data Consistency in Real-Time Systems: Notes From a Trading Infrastructure Article
There's a category of engineering problem I find genuinely interesting: systems where the cost of getting consistency wrong is immediate, measurable, …
Here is how I would use NestJS to stop one fraud check from freezing an entire fintech platform
Picture this. A fintech company processes thousands of transactions a day. Every single one of them has to pass through a fraud check before it goes t…
Bypassing AMM Slippage: How Typelex Uses On-Chain Atomic Swaps for MEV-Proof OTC Trading
If you’ve ever built or interacted with DeFi protocols, you know the mathematical limitations of Constant Product Market Makers ($x \times y = k$). Wh…
A Shadow Decision System Found a Semantic Boundary Bug in 14 Minutes
I am running an experimental autonomous trading architecture called Darwin. During an audit of its agent-ranking and sizing authorities, I built a rea…
AI Agent Spend Governance: Controls, Policies, and Audit Trails
Your AI agent just spent $4,200 on a data enrichment API — in 11 seconds. Nobody approved it. Nobody noticed until the invoice arrived. This isn't a h…
Payment APIs, Decoded: The Architecture Behind Flutterwave, Paystack, PesaPal, IntaSend, and Stripe
If you've integrated a payment API before, you've probably followed a quickstart guide, pasted in a secret key, hit an endpoint, and shipped it. It wo…
Moving 20,000+ customers to a new Stripe account without anyone noticing
None of our 20,000+ US customers know this happened: last month, we moved them, their payment methods, subscriptions, credits, coupons, and promotion …
Financial Market Analysis (Double-Tower Transformer)
Content Intro - What is it? Briefly A predictive machine learning system explicitly designed to generate profitable trading signals from high-frequenc…
The Real Cost Structure of Sportsbook Platforms in 2026 (Build vs Buy)
A build-vs-buy cost breakdown for founders eyeing the betting vertical — real 2026 numbers. Every few months a founder asks me why sportsbook platform…
Why React Native Is the Better Choice for AI Product Engineering in FinTech (And the Companies Building It Best)
AI is everywhere in fintech right now. Banks are deploying AI copilots, payment companies are automating fraud detection, lenders are using predictive…
Idempotency in NestJS, and Why Your Transaction ID Is Not Always Enough
Picture a customer tapping send on a payment, the app freezes for a second, and out of habit they tap it again. If your backend is not built to handle…
How NestJS Handles Ingestion Boundaries When Transaction Data Comes From an External Bank API
Most banking backend tutorials focus on transactions your own system creates. A user taps a button, your service writes a record, and you control ever…
Payment Systems Architecture — From Laravel Integrator to Staff-Level Architect
This guide takes you from "I integrate HyperPay/Paymob/Stripe webhooks" to "I can design the payment infrastructure of a fintech company." It's writte…
How NestJS Handles Secure Transactions in Banking Applications
Banking software cannot afford to be casual about anything. Every transaction needs to be verified, logged, protected from tampering, and traceable if…
Decision Provenance in Distributed Financial Systems: Why Systems Must Explain Their Own Decisions
Abstract Distributed financial systems do not merely process transactions. They make decisions. A transaction is approved, rejected, delayed, escalate…
Building Trustworthy AI Beyond Prediction
Building Trustworthy AI Beyond Prediction Over the past months, I've been developing CREDERE, an AI engineering project exploring a question that I be…