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Notes from the Engine Room

Architecture decisions, production incidents and hiring calls, written by the engineers who made them.

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How Much Does It Cost to Build an App in Spain in 2026 (Real Numbers, Three Ways to Buy)

What an app really costs to build in Spain in 2026: the arithmetic behind the ranges (hourly bands × team-weeks), the three ways to buy it, the costs the quote hides, and the one rule for picking a channel.

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How Much Does It Cost to Build an App in Spain in 2026 (Real Numbers, Three Ways to Buy)

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175 articles
How Much Does It Cost to Build an App in Spain in 2026 (Real Numbers, Three Ways to Buy)Guides

How Much Does It Cost to Build an App in Spain in 2026 (Real Numbers, Three Ways to Buy)

What an app really costs to build in Spain in 2026: the arithmetic behind the ranges (hourly bands × team-weeks), the three ways to buy it, the costs the quote hides, and the one rule for picking a channel.

August 30, 2026·9 min read
Conect AI Dev: the AI Development Platform We Install in 24 Hours on Any Codebase — Agents, Connectors and Human GatesChallenges

Conect AI Dev: the AI Development Platform We Install in 24 Hours on Any Codebase — Agents, Connectors and Human Gates

A technical walkthrough of the Conect AI Dev, the AI-native development platform we deploy with our engineers — our own agentic loop, Python MCP connectors to JIRA and Confluence, an orchestrator plus dev, QA, infra and code-validator agents, and human gates where they belong — as installed at STUVEO in 24 hours on an existing codebase.

August 27, 2026·10 min read
What a Fractional CTO Costs in Spain in 2026 (and What the Price Is Actually Buying)Guides

What a Fractional CTO Costs in Spain in 2026 (and What the Price Is Actually Buying)

The real price of a fractional CTO in Spain in 2026 — from €1,040 a month for advisory to a half-time embedded seat — with the hourly rate behind each figure, the market ranges, and the five moments when paying for one beats not paying.

August 26, 2026·7 min read
How We Run a Software Project End-to-End (and Where Most Partners Stop Early)Guides

How We Run a Software Project End-to-End (and Where Most Partners Stop Early)

The four phases we run on every end-to-end software project — discovery, architecture, sprints, handover — with the cadence, the roles and the numbers we sign against. Written from the delivery seat, not the sales deck.

August 26, 2026·8 min read
Putting an LLM Inside a Product That Already Works: What a Senior Team Does in the First 30 DaysChallenges

Putting an LLM Inside a Product That Already Works: What a Senior Team Does in the First 30 Days

You already have a product, users and a bill. Here is the 30-day plan a senior team runs to integrate an LLM into it without breaking either — one workflow, an eval set from real traffic, a thin slice behind a flag, and cost limits before the rollout.

August 26, 2026·8 min read
Software Development Partners for Startups in Spain and the EU (2026): Who Fits Which JobGuides

Software Development Partners for Startups in Spain and the EU (2026): Who Fits Which Job

A CTO's map of software development partners for startups in Spain and the EU in 2026 — boutique studios, product-engineering houses, embedded squads — sorted by what each one is built for, with the questions that separate them.

August 26, 2026·8 min read
What a «Software Factory» Is — and Why a Company of Fifteen Should Not Buy Onestrategy

What a «Software Factory» Is — and Why a Company of Fifteen Should Not Buy One

«Software factory» started as a 1970s manufacturing metaphor and became the Spanish and Latin-American word for outsourced development. What the model is, who it is built for, and why a company of two to fifteen people gets a better result from a senior squad than from a factory.

August 26, 2026·7 min read
AI Adoption in Mid-Size and Large Companies: The First-Year GuideGuides

AI Adoption in Mid-Size and Large Companies: The First-Year Guide

A practical guide to AI adoption for mid-size and large companies: the three execution paths, what each really costs, a quarter-by-quarter first year, and the six patterns that kill pilots before production.

August 20, 2026·9 min read
You've Just Been Named First CIO (or Head of AI). You Have No Team. Now What.Guides

You've Just Been Named First CIO (or Head of AI). You Have No Team. Now What.

A guide for the first CIO, Chief AI Officer or digital transformation lead of a mid-size or large company: how to execute in year one without an in-house engineering team.

August 20, 2026·7 min read
Bilingual English/Spanish Engineering Teams From Spain: The Nearshore Case Nobody Makes for US Companiesstrategy

Bilingual English/Spanish Engineering Teams From Spain: The Nearshore Case Nobody Makes for US Companies

Every nearshore guide points a US company at LATAM. Here is the case for Spain instead — real time-zone overlap, engineers who work in English and Spanish by default, EU contracts and IP, and an all-in rate that stays. From someone who runs those teams.

August 17, 2026·7 min read
How to Hire Senior Developers in Spain in 2026: Real Cost, Timelines and the Mistakes That RepeatGuides

How to Hire Senior Developers in Spain in 2026: Real Cost, Timelines and the Mistakes That Repeat

Payroll, freelance or a deployed team — the three ways to hire senior developers in Spain, what each one really costs once you count social contributions, search time and risk, how long each takes, and the six mistakes I keep seeing. Rate card included.

August 17, 2026·8 min read
MintID Renewed at Twice the Original Budget. This Is the Work Behind It.Case Studies

MintID Renewed at Twice the Original Budget. This Is the Work Behind It.

A €200,000 engagement, three engineers and a delivery manager embedded in a sovereign-chain identity protocol — from the protocol core to three verifier SDKs, delivered with zero bugs — and a new engagement of €400,000 more, signed.

August 12, 2026·8 min read

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