Principal Full Stack Developer with React (Remote, Global)

What you’ll do We’re looking for a Principal Full‑Stack Engineer - someone who builds things that matter and leads by example. You’ll write code, define architecture, and help shape our product and engineering culture. Ready to make an impact? Here’s how you’ll contribute: • Ship full-stack features - React frontends, backend APIs, data layers, infra scripts, etc. • Review code, mentor engineers, and raise the bar across the team • Lead architecture & technical standards without red tape • Collaborate with product & design to deliver value fast • Own complex initiatives end-to-end - we trust you to make decisions • Optimize performance, scalability & reliability without endless meetings • Troubleshoot production issues and guide incident response The technical challenges This isn't CRUD work. You'll be solving real problems: • Designing and shipping secure integrations - ML prediction engines, LLMs, third-party APIs with strict auth and data handling • Building high-performance UIs that stay fast under heavy data loads • Creating dashboards that turn complex datasets into clear, actionable insights • Scaling a multi-tenant SaaS platform - and shipping on-prem for enterprise customers who need it • Working with security-sensitive data where mistakes aren't an option Who you are You're an engineer who: • Has 8+ years of professional experience with excellent full-stack skills • Brings 4+ years working with React (Next.js), Nest.js/Express, GraphQL, Docker, Postgres • Understands system design and architecture - CQRS, event sourcing, distributed systems • Builds scalable, secure, production-ready systems and takes ownership of them • Communicates clearly in English, both written and verbal • Enjoys working in high-trust, low-bs environments Bonus points • You've built real-time data visualizations or analytics dashboards (tailwind, d3, ag-grid) • You've worked with behavioral data, event streams, or time-series analysis • You've shipped ML-powered features to production • You have DevOps/CI-CD chops