Job Title: Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI)
Company: Unknown Systems
Location: Remote (London-based preferred)
Job Type: Equity-Only | Part-Time or Flexible Hours
About the Role Unknown Systems is building Nanu, a groundbreaking platform that investigates unexplained phenomena through community-submitted experiences and AI-powered tools.
We're looking for a Senior Full Stack Developer to join us at a pivotal moment. This is an equity-only role perfect for someone excited by early-stage building, who wants to help launch something truly unique.
You’ll Be Responsible For:
Leading frontend and backend development of the Nanu platform
Building scalable features using Flutter and FastAPI
Collaborating closely with our founder and lead developers
Contributing to architecture, infrastructure, and product evolution
Helping shape the future of a global community-driven product
Our Tech Stack:
Frontend: Flutter (iOS, Android, Web)
Backend: FastAPI, Python
Database: PostgreSQL
Auth: AWS Cognito
Infra: Redis, Alembic, SQLAlchemy, Pydantic, Pytest
AI: OpenAI API integrations
Feed: Multi-factor ranking system for personalised content
You’re a Great Fit If You:
Have 10+ years of experience (min 5+ with Flutter, Python, AWS)
Love building clean, scalable, production-ready apps
Thrive in startup environments and take ownership
Are curious, open-minded, and mission-driven
Bonus: experience with AI, community platforms, or content moderation
What We Offer:
Equity in a high-potential, early-stage company
Flexible hours and remote-first culture
Influence over product and technical direction
A chance to build something that truly matters