At a Glance
- Tasks: Own the entire tech stack, from backend to frontend, and ship features rapidly.
- Company: Fast-paced AI startup revolutionising the real estate industry in London.
- Benefits: Competitive salary, late-night Uber rides, and a brand new MacBook.
- Other info: High-intensity environment with opportunities for rapid career growth.
- Why this job: Join us to build impactful AI solutions in a $1T+ industry.
- Qualifications: Proficient in Python, FastAPI, and Next.js; eager to own systems end-to-end.
The predicted salary is between 60000 - 80000 £ per year.
Hoxton, London. In-office 5 days a week, on-site. PLEASE DO NOT APPLY IF YOU ARE NOT IN THE UK. This will be the hardest job you've ever had. We operate with the intensity and speed of an SF YC-stage startup, but in London. Shipped features, not endless planning. We need an engineer who can own technical systems end-to-end and thrive in a fast-paced, high-stakes, five/six-day-a-week environment.
What we’re building
Our starting point is selling to real estate agencies, where we’re replacing manual workflows with AI employees that handle tenant engagement, landlord outreach, compliance, and maintenance autonomously. Property is one of the most important parts of people’s lives, and the experience of buying, selling or renting one is still terrible. The industry is fragmented, compliance-heavy, and deeply inefficient. It runs on spreadsheets, missed calls, and manual processes that haven’t changed in 30 years. Nobody has built the definitive AI agent layer for real estate yet. That’s what we’re doing.
Backed by Entrepreneurs First and top-tier VCs. Live with agencies across the UK with early US traction. Building AI agents that don’t just assist. They do the work. Based in Hoxton, London. In-office 5/6 days a week.
The Role
As a Full-Stack Engineer, you’ll:
- Own backend, frontend, infrastructure, and deployment. Full-stack ownership.
- Make architectural decisions that shape our product.
- Ship features from concept to production in days, not weeks/months.
- Work closely with the founding team on strategic technical direction.
- Mentor future engineers as we scale (you’ll be early enough to shape culture).
- Debug production issues at 2am without hesitation, then ship the fix by morning.
You’ll touch every layer of what makes our AI agents actually useful in production:
- The Python / FastAPI backend that orchestrates our agents.
- LLM orchestration and RAG pipelines.
- Telephony and voice infrastructure (real-time calls, STT/TTS).
- Messaging integrations (WhatsApp, SMS, email).
- API integrations with property management and CRM systems.
- A Next.js / TypeScript frontend that operators and customers actually use.
Required Skills
Mandatory (non-negotiable)
- Python. Backend systems, scripting, data processing.
- FastAPI. Async APIs and event-driven services.
- Next.js / React. Production apps real users touch.
This is not a feature-builder role. You’re creating entire systems, making tradeoffs, and owning their outcome end-to-end.
Highly desired
- Track record building products from 0 to 1 or scaling at an early-stage startup.
- Hands-on with LLMs in production (orchestration frameworks, vector databases, evals).
- System design and architecture experience.
- Ability to read unfamiliar code and understand it quickly.
Nice to have
- 1+ years at a top-tier tech company.
- Desire to found in the future.
We value taste, speed, and a maker’s mindset over credentials.
How we work
This is not a 9-to-5 role. We operate with YC startup culture in London. 12-hour days are standard. 10am to 10pm or similar flexibility. Five-Six-day working weeks. 5 days - In-office in Hoxton. High-intensity environment. Fast decisions, high stakes, rapid iteration. Fast feedback loops. Ideas to code to production in days. High ownership, high autonomy. You make calls, not committees.
We are rebuilding a $1T+ industry and we don’t think that happens on a 9-to-5. If you’re optimising for work-life balance, predictable hours, or a slow pace, this isn’t for you. We need people energised by intensity, not drained by it.
This role isn’t for you if
- You want a predictable 9-to-5.
- You optimise for work-life balance over output.
- Six days a week in the office sounds exhausting rather than energising.
- You want to feature-build instead of system-build.
What we offer
- Front-row seat to building the AI agent layer for a $1T+ industry.
- A team obsessed with winning. Small, fast, building something that matters.
- Uber home when you’re working late.
- DoorDash dinners in the office.
- Brand new MacBook.
But the real offer is ownership. You own the system. You make the calls. No committees, no waiting for permission.
End-to-End AI Full-Stack Engineer – Real Estate (London) employer: Letty
Join a dynamic team in Hoxton, London, where you'll be at the forefront of revolutionising the real estate industry with cutting-edge AI technology. We foster a high-intensity work culture that prioritises rapid innovation and ownership, allowing you to make impactful architectural decisions and mentor future engineers. With a focus on personal growth and a commitment to building something meaningful, this is an exceptional opportunity for those who thrive in fast-paced environments and are eager to shape the future of property management.
StudySmarter Expert Advice🤫
We think this is how you could land End-to-End AI Full-Stack Engineer – Real Estate (London)
✨Tip Number 1
Get your networking game on! Connect with people in the industry, attend meetups, and engage on platforms like LinkedIn. You never know who might have a lead on that perfect role.
✨Tip Number 2
Show off your skills! Build a portfolio showcasing your projects, especially those that demonstrate your full-stack capabilities. This is your chance to shine and prove you can own technical systems end-to-end.
✨Tip Number 3
Prepare for the interview like it’s a sprint, not a marathon. Research the company, understand their tech stack, and be ready to discuss how you can contribute to their fast-paced environment.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are proactive and eager to join our mission in revolutionising the real estate industry.
We think you need these skills to ace End-to-End AI Full-Stack Engineer – Real Estate (London)
Some tips for your application 🫡
Show Your Passion:When you write your application, let your enthusiasm for the role shine through. We want to see that you're genuinely excited about tackling the challenges in the real estate industry and building AI solutions that make a difference.
Be Specific About Your Skills:Make sure to highlight your experience with Python, FastAPI, and Next.js/React. We’re looking for someone who can own technical systems end-to-end, so give us concrete examples of how you've done this in the past.
Keep It Concise:We appreciate brevity! Get straight to the point and avoid fluff. We want to know what you can bring to the table without wading through unnecessary details. Remember, we’re all about shipping features quickly!
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 ensure it gets the attention it deserves. We can’t wait to hear from you!
How to prepare for a job interview at Letty
✨Know Your Tech Inside Out
Make sure you’re well-versed in Python, FastAPI, and Next.js/React. Be ready to discuss your past projects and how you’ve built systems from the ground up. They’ll want to see that you can own technical systems end-to-end, so prepare examples that showcase your experience.
✨Embrace the Intensity
This role is all about thriving in a fast-paced environment. Be prepared to talk about how you handle high-pressure situations and tight deadlines. Share stories where you’ve shipped features quickly or debugged issues under pressure to demonstrate your ability to keep up with their intensity.
✨Show Your Problem-Solving Skills
Expect technical questions that test your problem-solving abilities. Think through potential scenarios they might present, especially around system design and architecture. Practice explaining your thought process clearly, as they value quick, effective decision-making.
✨Cultural Fit is Key
They’re looking for someone who aligns with their startup culture. Be honest about your work ethic and willingness to put in long hours. Discuss how you thrive in environments that require high ownership and autonomy, and why you’re excited about building something impactful in the real estate industry.
