Formation is a San Francisco–based, A16Z-backed virtual fellowship that trains experienced software engineers to land senior roles at top tech companies. It pairs adaptive AI assessments with one-on-one mentorship from engineers at Meta, Google, Stripe and Airbnb to drill candidates on algorithms, system design and modern AI fluency.
Karri Saarinen is the co-founder and CEO of Linear — a $1.25B unicorn project management tool trusted by 66% of Forbes' top 50 AI companies, including OpenAI, Ramp, and Vercel. A Finnish designer-turned-engineer who grew up questioning why everyday objects look ugly, attended 5,000-person LAN parties as a child, and turned that instinct into one of the most respected product careers in Silicon Valley. After shaping the visual language at Coinbase and Airbnb (Cereal typeface, Design Language System, Lottie, Google Material Design Award), he co-founded Linear in 2019 with two fellow Finns from Helsinki — and built it to 20,000+ customers and $100M+ ARR while staying profitable the entire time. His philosophy: quality is the growth strategy, tools embed opinions so choose accordingly, and the best MVP in a crowded category isn't minimal — it's sharply opinionated for a specific audience.