Serhan Yavçin

TypeScript, Node.js, LLM integrations, SDK & API design, monorepos, backend and worker services, vector search (Qdrant).

Statistics for LLM experiments (sequential A/B testing), prompt evaluation, and native macOS development with SwiftUI.

PromptHelm (prompthelm.app): runtime prompt management for LLM apps. Versioned prompts, one-click rollback, A/B tests, no redeploys. Also Mossling and SimpleRecover.

Chatting about LLM apps in production, prompt management, dev tooling and indie hacking. Building with LLMs? Happy to swap notes or hear your feedback on PromptHelm.