Senior Full-Stack Engineer

Cello turns word-of-mouth into a systematic growth channel for SaaS companies — trusted by Typeform, Miro, and VEED, with 30+ new customers monthly and 10M+ end users interacting with the system every month. Small team, real influence on architecture and product direction, not ticket-factory work. Stack: React, NestJS, Python, AWS. Looking for a strong full-stack problem-solver who's fluent with agentic coding tools (Claude Code, Cursor, MCP servers) and can still reason about systems and debug without AI assistance. Required: strong TypeScript/JavaScript + React (or similar), solid NestJS/Python and AWS experience, comfort with ambiguity and system architecture. Nice-to-have: React Native/Flutter, LangChain/multi-agent frameworks.