INV—24/7 · FIELD NOTES · EST. 2014 WRITING · VOL. 04 · 2026
Invental/Writing

Field notes from a software studio.

Essays, playbooks, and the occasional post-mortem. Engineering, design, SEO, and what it takes to ship real software in 2026 — written by the people doing the work.

42 essays · Updated weekly RSS → /feed.xml
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Security

Application security analysis tools: SAST, DAST, SCA and ASPM, explained.

Every scanner finds a different class of flaw; none, on its own, tells you what to fix first. How the tools actually work in 2026 — and why buying more rarely makes an app more secure.

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Security

Whitespots vs DefectDojo: managed ASPM vs open-source triage.

A fair comparison of managed ASPM and open-source vulnerability triage — native scanning, dedup, false positives, the real cost of "free", and who should pick which.

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Security

Open-source application security tools: the best free scanners in 2026.

The free SAST, DAST, SCA, secrets and IaC scanners worth running — and the honest point where a DIY open-source stack starts costing more than it saves.

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Market

The Middle East's real fintech buyer isn't a unicorn — it's the mid-market on a regulator's clock.

In the Gulf, modernization is set by the regulator's calendar, not the CFO's budget. The 201–1,000 mid-market is legally in scope, and too lean to build in-house.

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Market

The 201–1000 squeeze: why mid-sized European fintechs are the receptive ones.

Investors killed growth-at-all-costs while DORA and PSD3 imposed bank-grade compliance regardless of size. The mid-band is caught in a buying window.

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Market

The squeezed middle of US finance — the real buyers aren't who you think.

Not the megabanks (they build in-house), not the seed neobanks (no budget). The 201–1,000-employee tier can't hire or fundraise its way to modernization — it has to buy.

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Market

The LatAm fintech sweet spot isn't the unicorns — it's the tier underneath.

Everyone studies Nubank's 123M customers. If you sell into LatAm fintech, that's the wrong company to study. The reachable buyers are the 200–1,000-person tier below it.

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Engineering

Typed from day one: why we don't ship untyped JavaScript anymore.

Types aren't about purity — they're about shipping faster with fewer nights on call. What we use, what we skip, and the two rules we enforce on every project.

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Process

How we scope a project in a single week (and what we refuse to estimate).

Five days, four artefacts, one honest number. The shape of our discovery engagement and why we never send a multi-page proposal.

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SEO

SEO for product teams: the ten things that actually move the needle.

Engineering-grade SEO for 2026 — Core Web Vitals, structured data, content architecture. No content farming, no link swaps.

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Shopify

Notes on designing Shopify checkout extensions.

What the new extensibility surface gets right, what it still gets wrong, and the patterns we've arrived at after shipping twelve of them.

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Design

What a studio-grade design system looks like in 2026.

Tokens, primitives, composition — how we structure design systems so they survive a handoff, a team change, and three years of product drift.

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Engineering

Postgres is still the correct answer.

We audited fourteen greenfield stacks we've shipped since 2023. In every one of them, Postgres plus a decent ORM was the right default. Here's why.

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Process

The two-week sprint contract — our engagement model, written out.

No hour-by-hour invoicing, no scope creep, no mystery. The cadence we've used on forty-plus engagements and why clients renew on it.

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Design

Editorial typography for product interfaces.

What magazines do better than product designers, and how to borrow from them without your dashboard turning into a zine.

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Engineering

Observability for teams of five or less.

You don't need a platform team to know what your app is doing. A minimal observability stack that costs less than one senior engineer's monthly coffee.

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