Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Lead the development of a unique platform using Flutter and FastAPI.
- Company: Join Unknown Systems, a startup focused on exploring unexplained phenomena.
- Benefits: Enjoy equity, flexible hours, and a remote-first culture.
- Why this job: Be part of a groundbreaking project that shapes a global community.
- Qualifications: 10+ years experience, with 5+ in Flutter, Python, and AWS required.
- Other info: Ideal for those passionate about startups and innovative technology.
The predicted salary is between 36000 - 60000 £ per year.
Unknown Systems is building Nanu, a groundbreaking platform that investigates unexplained phenomena through community-submitted experiences and AI-powered tools. We are 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
Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI) (Central London / West End) employer: Unknown Systems
Contact Detail:
Unknown Systems Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI) (Central London / West End)
✨Tip Number 1
Familiarise yourself with the specific technologies mentioned in the job description, especially Flutter and FastAPI. Consider building a small project or contributing to an open-source project using these technologies to showcase your skills.
✨Tip Number 2
Engage with the community around AI and community-driven platforms. Join relevant forums or social media groups where you can share insights and learn from others, which could help you connect with like-minded individuals at Unknown Systems.
✨Tip Number 3
Prepare to discuss your experience in startup environments during any interviews. Highlight specific examples of how you've taken ownership of projects and contributed to their success, as this aligns well with the company's culture.
✨Tip Number 4
Research Unknown Systems and their product, Nanu. Understanding their mission and vision will allow you to tailor your conversations and demonstrate your genuine interest in being part of their journey.
We think you need these skills to ace Senior Full Stack Developer (Equity Only | Remote | Flutter + FastAPI) (Central London / West End)
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with Flutter, FastAPI, and Python. Emphasise any previous roles where you led development projects or worked in startup environments.
Craft a Compelling Cover Letter: In your cover letter, express your enthusiasm for the role and the company's mission. Mention specific experiences that demonstrate your ability to build scalable applications and your interest in community-driven products.
Showcase Relevant Projects: Include links to your portfolio or GitHub showcasing projects that align with the tech stack mentioned in the job description. Highlight any AI integrations or community platforms you've worked on.
Prepare for Technical Questions: Be ready to discuss your technical skills in detail. Prepare examples of challenges you've faced in previous projects and how you overcame them, particularly in relation to building production-ready apps.
How to prepare for a job interview at Unknown Systems
✨Showcase Your Technical Skills
Be prepared to discuss your experience with Flutter and FastAPI in detail. Highlight specific projects where you've built scalable applications, and be ready to demonstrate your understanding of the tech stack mentioned in the job description.
✨Emphasise Your Startup Experience
Since this role is in a startup environment, share examples of how you've thrived in similar settings. Discuss your ability to take ownership of projects and adapt to changing requirements, as this will resonate well with the company's needs.
✨Demonstrate Your Passion for the Mission
Unknown Systems is looking for someone who is mission-driven. Research their platform, Nanu, and express your enthusiasm for contributing to a community-driven product that investigates unexplained phenomena. This will show that you align with their vision.
✨Prepare Questions About the Role
Have thoughtful questions ready about the company's future direction, the team dynamics, and how they envision the development process. This not only shows your interest but also helps you assess if the role is the right fit for you.
