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Engineering notes on Rails, Ruby, AI and testing, and guides for founders who work with engineers.

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fractional-ctocost-analysisstartup-finance

Fractional or Full-Time CTO? How to Compare the Total Cost

A framework for comparing a fractional CTO with a full-time hire: which costs to count, how to model break-even with your own numbers, and when each model fits.

· Paul Keen
vendor-managementoutsourcingsoftware-development

Poor Dev Vendor Management Costs More Than the Invoice

The invoice is the visible cost of a dev-shop project. The hidden ledger - your hours, the stalled launch, paying twice - is what breaks budgets. A four-phase fix.

startupmanagementrails

Why CTOs Still Choose Ruby on Rails in 2025

Is Rails still a safe bet? What Rails 8 ships, how long each version gets security fixes, what Shopify says about running a huge Rails monolith, and the questions to ask before agreeing to a rewrite.

startupmanagementproductivity

Building The World's Best Image Diffusion Model

Build image diffusion models: Suhail Doshi (Playground) shares AI image generation strategies, text accuracy techniques, prompt engineering. Create graphic design tools for startups ✓

developer-mindsetengineering-successdeveloper-growth

Five Mindset Shifts That Decide a Developer's Career

Technical skills get you hired. Mindset shapes how you learn and grow after that. Five mindset shifts for developers, with habits and an eight-week plan to practice them.

· Paul Keen
startupmanagementproductivity

How MVP Development Services Reduce Startup Risk

Starting a new business is no small feat, and having a solid plan can make all the difference.

startuptutorialmanagement

How to Build a Single Source of Truth for Your Startup

Most early-stage failures come from misalignment rather than technology. How to build a single source of truth the whole team actually uses.

startupmanagementproductivity

Marketplace Jobs and What They Change in the Job Market

Marketplace jobs are really shaking things up in 2025. They're not like your typical 9-to-5 gigs.

startuptechnical-leadershipcto

5 Warning Signs Your Startup Needs Technical Leadership

Five signs a founder can spot without reading code: slow simple changes, no-go zones, endless technical meetings, rewrite talk, and a team that stops committing to dates.

· Paul Keen
fractional-ctostartup-leadershiptechnical-strategy

Fractional CTO vs Full-Time CTO: A Side-by-Side Comparison

What a fractional CTO and a full-time CTO each give a startup, what a full-time hire costs according to BLS data, and the questions that decide between them.

· Paul Keen

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