Architecture8 min read
Designing systems that survive their first 100k users
Read article
Knowledge Hub
Ideas, patterns and playbooks for modern software teams.
A curated library of what we've learned shipping products at scale — architecture, AI, performance, and the practice of building well.
Engineering Insights
Deep dives into architecture, performance, and the craft of shipping resilient software.
24 articles
Product Playbooks
Frameworks for scoping, designing, and launching products customers actually love.
12 playbooks
Tutorials & Guides
Step-by-step walkthroughs covering modern stacks — from TanStack to AI agents.
38 guides
Case Studies
How real teams used Lumen to ship faster, scale safely, and delight their users.
9 stories
Latest articles
Fresh thinking from our engineers and designers.
AI6 min read
Evals before features: a pragmatic approach to LLM products
Read article
DX10 min read
Type-safe end to end: lessons from a year on TanStack
Read article
Performance5 min read
Why we budget every kilobyte (and how you can too)
Read article
Process7 min read
The minimum viable design system for early-stage teams
Read article
Cloud9 min read
Edge-first by default — pitfalls and patterns
Read article
Ready to build something powerful?
Let's turn what you've read into what you ship.
Start Your Project