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- Tasks: Design and build user workflows from UI to backend, integrating AI features.
- Company: Stealth startup backed by top-tier VCs, focused on transforming industries.
- Benefits: Visa sponsorship, relocation support, meals, and tools covered.
- Why this job: Join a world-class team and ship impactful products from day one.
- Qualifications: Strong TypeScript and React skills, backend experience in Python, AI integration knowledge.
- Other info: Dynamic environment with high ownership and rapid career growth opportunities.
The predicted salary is between 36000 - 60000 £ per year.
We’re removing one of the last great barriers to progress in the physical world. While software moves fast, industries like aerospace, healthcare, and energy are still slowed by outdated, manual systems. We are rapidly growing in stealth with 6-figure revenue, backed by a 14× oversubscribed $4.5m seed round from Tier-1 VCs such as Coinbase, Reddit, Klarna, and Spotify. Our world-class team includes former unicorn founding engineers and talent from X, Google, Amazon, and Yandex. We value people who want to win and thrive in high-ownership environments. We’re building the system that lets complex, real-world work move at software speed.
We’re looking for a Fullstack Engineer who thinks in user workflows, not tickets or isolated features. This is a role for someone who wants to decide what should exist, build it end-to-end, and put it in users’ hands. You will fit right in if you have experience with:
- Product Engineering — Design and build end-to-end user workflows, from UI to backend logic and data
- User Experience — Translate complex real-world processes into clear, intuitive interfaces
- Frontend — Build production-grade UI using modern frontend frameworks (React, TypeScript)
- Backend — Implement APIs, business logic, and data models that support complex workflows
- AI Integration — Design and integrate AI-powered features (LLMs, agents, model-backed APIs) into user workflows
- Product Judgment — Be opinionated about what to build, what not to build, and when to ship
- Ownership — Build fast and ship production-grade systems with high ownership
What You Will Do:
- Ship from Day 1 — Deploy to production immediately and own real product surface area
- Own it end-to-end — Create specs, figure things out, and build features end-to-end
- Solve real problems — From UX polish to backend logic to jumping on customer calls
Technically, we are looking for:
- Strong experience with TypeScript and modern frontend frameworks (React or equivalent)
- Comfortable building backend services in Python
- Experience integrating AI systems (LLMs, agents, model-backed APIs) into production products
- Ability to reason about complex workflows, not just CRUD
Strong plus if you have:
- Founder or ex-founder experience
- Early-stage or stealth startup background
- Founder fellowships or similar environments (EF, YC, Antler, etc.)
- Experience building AI-powered products in production
- Experience working where requirements were unclear and evolving
Your First Month:
- Ship to production from day one
- Own problems end-to-end, from definition to deployment
- Do what needs doing, including UX polish, debugging, and customer interaction
We Offer:
- Pace and purpose — In-person in London (visa sponsorship available)
- No friction — Relocation, visas, meals, and tools fully covered
- A tight-knit team — High standards, high trust, no politics
Founding Fullstack Engineer employer: Seamflow
Contact Detail:
Seamflow Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Founding Fullstack Engineer
✨Tip Number 1
Network like a pro! Reach out to people in your industry, especially those who work at companies you admire. A friendly chat can lead to referrals or insider info about job openings.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your projects, especially those that align with the role you're after. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews by practising common questions and coding challenges. But don’t just rehearse; think about how your past experiences relate to the job and be ready to share those stories.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, it shows you’re genuinely interested in joining our team and making an impact from day one.
We think you need these skills to ace Founding Fullstack Engineer
Some tips for your application 🫡
Show Your Passion: When writing your application, let your enthusiasm for the role shine through. We want to see that you’re genuinely excited about building user workflows and solving real problems. Share why this opportunity speaks to you!
Tailor Your Experience: Make sure to highlight your relevant experience with TypeScript, React, and backend services in Python. We’re looking for someone who can build end-to-end solutions, so give us examples of how you've done this in the past.
Be Clear and Concise: While we love detail, clarity is key! Make your application easy to read and straight to the point. Use bullet points if it helps, and ensure we can quickly grasp your skills and experiences.
Apply Through Our Website: Don’t forget to submit your application through our website! It’s the best way for us to keep track of your application and ensures you don’t miss out on any important updates from our team.
How to prepare for a job interview at Seamflow
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in TypeScript, React, and Python. Be ready to discuss your past projects and how you’ve used these technologies to solve real-world problems. Prepare to explain your thought process when building user workflows and integrating AI features.
✨Showcase Your Product Judgment
Be prepared to share your opinions on what makes a great product. Think about the balance between user experience and backend logic. Discuss examples where you had to make tough decisions on what to build or prioritise, and how that impacted the end-user.
✨Demonstrate Ownership and Initiative
This role is all about taking ownership from day one. Share experiences where you’ve taken the lead on projects, defined specs, and driven them to completion. Highlight your ability to jump into customer calls and gather feedback to improve the product.
✨Prepare for Problem-Solving Scenarios
Expect to tackle some real-time problem-solving during the interview. Brush up on your ability to reason through complex workflows and think on your feet. Practice explaining your approach to debugging and refining user interfaces, as well as how you’d handle evolving requirements.
