This is what building a Two-Node Lightning Network From Scratch looked like in one week.
There's a version of learning Bitcoin where you read the whitepaper, nod along, and move on. Then there's the version where you're staring at a termin…
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The Indie Hacker's Guide to UK Business Banking in 2026
If you're building a SaaS or side project as a solo founder in the UK, your bank account is infrastructure as much a part of your stack as your hostin…
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…
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…
Building a Financial Document OCR with Claude Vision API: Lessons from Production
After processing thousands of bank statements, invoices, and receipts through Claude Vision API, I've learned that financial document OCR is harder th…
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 …
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…
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…
Snappt Alternative: A Self-Serve PDF Fraud Detection API for Rental & Beyond
Originally published at htpbe.tech . The version on htpbe.tech stays in sync with the latest detection algorithm — refer to it for the canonical text.…
Fintech Needs Sandboxes, Not Just Live APIs
I’ve been back in the trenches of finance and technology. Fintech, in practice, is rarely one company owning the whole stack. It is a chain of regulat…
SBA-7a Loan Stip Fraud Detection: Post-PPP Lessons
Originally published at htpbe.tech . The version on htpbe.tech stays in sync with the latest detection algorithm — refer to it for the canonical text.…
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…
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 …
Accrual vs Cash-Based Accounting: Geographic Differences and What They Mean for Your API
If you are building software that touches accounting data, you need to understand the difference between accrual and cash-based accounting. The accoun…
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…
How Egyptian FRA Regulations Built Better FinTech Architecture
When our team started building the backend for a licensed NBFI under Egyptian financial regulations, compliance felt like a list of things we couldn't…
Idempotency in Payment APIs — Not Optional, Not Later
There's a version of this story that plays out at almost every fintech startup I've worked with: the team ships a payment API, it works in testing, it…
A sample eval matrix for financial-services voice AI agents
Disclosure: This post supports a fixed-scope Memetic Forge service offer. No affiliate links are included. Financial-services voice AI agents are not …
How to Build a Compliant Fintech App in the UAE
The UAE fintech sector spans three distinct regulatory authorities. Whether you are building for the CBUAE-licensed mainland, the DIFC, or the ADGM, t…
Why current balance is a weak UX primitive for everyday banking
If an app shows only how much money is there right now but ignores the obligations already moving towards that balance, it gives the user a distorted …
Algorithmic Entity Resolution in Music Metadata
In the global streaming economy, Spotify, Apple Music, and other DSPs process billions of plays daily. Behind this massive transaction layer lies a fr…
20 Threat Scenarios Every Banking Application Should Test (Before Attackers Do)
Every banking app I've ever worked on "worked" on the day it shipped. Login worked. Transfers worked. The balance updated correctly after every test c…
Why UPI and Fintech Apps Need Business Logic Testing (Not Just Security Testing)
Most fintech breaches you read about involve a hacker, a vulnerability, and a headline. Most fintech losses I've actually seen up close involve none o…
Why This System Looks the Way It Does — Recoverflow's 6-Day Design Journey
The day after submitting to the hackathon, I finally had a moment to look back at the whole system. Turned out something surprising. In these 7 days, …
What 506K real transactions taught me about how Latin Americans actually save
For nine years I ran Coinch, a goal-based savings app used by 30,000+ people across Mexico, Colombia, Argentina, Peru and Chile. When it wound down in…
AMLA Is Coming Online: What the EU's New Anti–Money Laundering Authority Means for Builders and Regulators
If you work anywhere near payments, banking, crypto, or fintech in Europe, a new acronym is about to land in your backlog: AMLA — the EU's Authority f…
Why your synthetic fintech data fails code review (and how mixture models fix it)
Every fintech developer has done this: you need test data, you reach for Faker, you generate ten thousand transactions, and your demo works. Then a da…
Benchmarking non-US payment infrastructure: a DORA compliance case study with cloud cost optimization services
Migrating payment infrastructure to EU: DORA compliance performance benchmarks A European fintech processing €50M annually needed to solve a critical …