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

2008Founded
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aillmstartup

Vertical LLM Agents as Billion-Dollar SaaS Opportunities

Vertical AI agents as a SaaS opportunity. What Casetext's founder says about its $650M sale to Thomson Reuters, and Y Combinator's case for billion-dollar vertical LLM agents. AI startup playbook ✓

startupoutsourcingdev-agency

What a Startup Development Company Does for Your Idea

Discover how a startup development company turns ideas into reality with innovative solutions and tech.

startupproduct

Virality and Network Effects: How Consumer Apps Grow

Explore how the best consumer companies use virality and network effects to grow their user base organically. Learn about key concepts and successful examples.

productstartup

Design Insights: Katie Dill Reviews Startup Websites

Stripe's Head of Design Katie Dill reviews startup websites like Mito, SigNoz and TAIV: first impressions, clear navigation, visual hierarchy and trust.

railsruby

The Best Rails Open Source Projects for Developers

Discover top Rails open source projects in 2025 that boost skills and innovation for developers.

startupmanagementproductivity

Finding The Right Co-Founder: A Guide For Startups

Building a startup is no small feat, especially when you’re trying to break into a competitive market.

startupmanagementproductivity

Starting a Business as a Software Engineer

Thinking about starting your own business as a software engineer in 2025? You're not alone. Many are turning their coding skills into successful ventures.

pythonlangchaindjango

LangChain Python Tutorial: Complete Guide

Learn LangChain Python with this comprehensive tutorial. Step-by-step guide with Django and FastAPI integration, production patterns, and 15+ working code examples. Build your first LLM app today.

rubyrailsai

Getting Started with LangChain-Ruby: A Complete Guide

Learn how to build AI-powered applications with LangChain-Ruby. Complete guide with working code examples, Rails integration, and production best practices for junior Ruby developers.

startupmanagementproductivity

Fractional Positions: How Flexible Employment Is Changing

Fractional positions are changing how we work, giving both companies and workers more flexibility. In 2025, this trend is expected to grow even more.

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