Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and build core backend systems using Python, shaping the future of AI solutions.
- Company: Exciting early-stage AI platform with a fast-growing team and innovative culture.
- Benefits: Competitive salary, equity options, and relocation support in London.
- Why this job: Join as a founding engineer and make a real impact on cutting-edge technology.
- Qualifications: 4+ years backend experience, strong Python skills, and a builder mindset.
- Other info: Direct access to founders and opportunities for significant career growth.
The predicted salary is between 43200 - 72000 £ per year.
Location: London King's Cross - onsite
Salary: Up to £200k base + meaningful equity
We are partnered up with an early-stage, well-funded AI platform company solving complex problems for large, highly regulated enterprises. The product is already live, customers are active, and the company is scaling fast but the engineering team is still growing. This is a true founding engineering position with real ownership, influence, and long-term upside.
The Role
As a Founding Backend Engineer, you'll help architect and build the core backend systems from the ground up. You'll work across system design, data infrastructure, and production reliability, partnering closely with ML, product, and infrastructure teams. You won't be maintaining legacy systems - you'll be shaping the foundations that everything else is built on.
What You'll Be Doing
- Designing and building core backend services and APIs in Python
- Architecting scalable data pipelines and distributed systems
- Productionising ML models in close collaboration with ML engineers
- Making early architectural decisions that will scale with the company
- Implementing async processing, caching, and event-driven workflows
- Setting engineering standards and best practices from day one
What We're Looking For
- 4+ years backend engineering experience
- Strong Python experience (FastAPI, Flask, or Django)
- Previous experience in startups or high-growth environments
- Comfort working with ambiguity, speed, and limited structure
- Strong database knowledge (PostgreSQL, Redis)
- Experience with async task queues and message brokers
- Cloud experience (Azure, AWS, or GCP)
- Builder mindset: ownership, pragmatism, and bias toward action
Why Join
- Competitive salary + meaningful equity
- Relocation support in London
- Direct access to founders and real technical influence
- Opportunity to help build a company from early scale to category leader
This role is not about perfect roadmaps or fixed requirements. It's about building fast, thinking deeply, and owning what you ship.
Python Developer in London employer: Jobster
Contact Detail:
Jobster Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Python Developer in London
✨Tip Number 1
Network like a pro! Reach out to people in the industry, especially those who work at startups or in AI. Use platforms like LinkedIn to connect and engage with them. You never know who might have the inside scoop on job openings!
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your Python projects, especially any backend systems or APIs you've built. This is your chance to demonstrate your expertise and builder mindset, so make it shine!
✨Tip Number 3
Prepare for technical interviews by brushing up on system design and data infrastructure concepts. Practice coding challenges that focus on Python and backend development. We want you to feel confident and ready to impress!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who take the initiative to reach out directly. Don’t hesitate – get your application in and let’s build something amazing together!
We think you need these skills to ace Python Developer in London
Some tips for your application 🫡
Show Your Passion for Python: When you’re writing your application, make sure to highlight your love for Python. Share specific projects or experiences where you've used frameworks like FastAPI, Flask, or Django. We want to see your enthusiasm and how you’ve tackled challenges in your previous roles!
Tailor Your Experience: Don’t just send a generic CV! Tailor your application to reflect the skills and experiences that match our job description. Focus on your backend engineering experience, especially in startups or high-growth environments. We’re looking for builders who can thrive in ambiguity!
Be Clear and Concise: Keep your application clear and to the point. Use bullet points to outline your key achievements and skills. We appreciate straightforward communication, so make it easy for us to see why you’d be a great fit for our founding engineering team.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss any important updates. Plus, we love seeing candidates who take the initiative to connect with us directly!
How to prepare for a job interview at Jobster
✨Know Your Python Inside Out
Make sure you brush up on your Python skills, especially with frameworks like FastAPI, Flask, or Django. Be ready to discuss your past projects and how you've used these technologies to solve real problems.
✨Understand the Company’s Product
Do your homework on the AI platform and its applications in regulated enterprises. Knowing how their product works and the challenges it addresses will show your genuine interest and help you connect your experience to their needs.
✨Prepare for System Design Questions
Since this role involves architecting backend systems, be prepared to tackle system design questions. Think about scalability, data pipelines, and how you would approach building a robust architecture from scratch.
✨Show Your Builder Mindset
Emphasise your ownership mentality and ability to thrive in fast-paced environments. Share examples of how you've taken initiative in previous roles, especially in startups or high-growth settings, to demonstrate your fit for this founding engineer position.
