Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI)

JR United Kingdom; Greater Manchester; Remote; GBP 60,000 - 100,000; Part time

Job summary

A pioneering startup is seeking a Senior Full Stack Developer for an equity-only role to lead the development of Nanu, a platform focused on unexplained phenomena. This remote position offers flexible hours and the chance to influence product direction while working with cutting-edge technologies like Flutter and FastAPI.

Benefits

Equity in a high-potential, early-stage company

Flexible hours and remote-first culture

Influence over product and technical direction

Chance to build something that truly matters

Qualifications

• 10+ years of experience, with a minimum of 5+ years in Flutter, Python, and AWS.
• Experience with AI, community platforms, or content moderation is a bonus.
• Strong ownership and startup experience.

Responsibilities

• Lead frontend and backend development of the Nanu platform.
• Build scalable features using Flutter and FastAPI.
• Collaborate closely with the founder and lead developers.

Skills

Flutter

Python

AWS

AI

Community platforms

Tools

PostgreSQL

Redis

SQLAlchemy

Pydantic

Pytest

Job description

Social network you want to login/join with:

Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI), Greater Manchester

Client:

Unknown Systems

Location:

Remote (London-based preferred)

Job Category:

Other

EU work permit required:

Yes

Job Views:

1

Posted:

25.05.2025

Expiry Date:

09.07.2025

Job Description:

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