Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London
Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise

Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London

London Full-Time 100000 - 200000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Design and develop cutting-edge frontend and backend applications using React and Python.
  • Company: Join a YC-backed AI-native enterprise with a dynamic and innovative culture.
  • Benefits: Earn a competitive salary plus equity and performance-based incentives.
  • Why this job: Be part of a pioneering team shaping the future of AI in enterprise solutions.
  • Qualifications: 5+ years in software engineering with strong skills in React, Python, and cloud technologies.
  • Other info: Mentor junior developers and enjoy a supportive environment with global opportunities.

The predicted salary is between 100000 - 200000 £ per year.

What You'll Be Doing

  • Design, develop, and maintain frontend applications using React and Next.js.
  • Build, test, and deploy backend services and APIs (Python/Django/FastAPI preferred).
  • Collaborate with founders, growth team, designers, and other engineers to deliver high-impact features.
  • Ensure scalability, performance, and security across the stack.
  • Implement CI/CD pipelines, automated testing, and monitoring solutions.
  • Contribute to infrastructure planning, deployment, and optimization in cloud environments (AWS, GCP, or Azure).
  • Develop and deploy AI-powered features in production, including RAG systems and multi-agent infrastructure.
  • Create data pipelines for AI model training, evaluation, and continuous improvement.
  • Mentor junior developers and promote engineering best practices.

What We're Looking For

  • 5+ years of professional software engineering experience.
  • Proven experience with React and Next.js in production environments.
  • Strong backend development skills (Python preferred).
  • Solid understanding of relational and/or NoSQL databases.
  • Experience with Git and collaborative development workflows.
  • Knowledge of cloud infrastructure, containerization (Docker, Kubernetes), and CI/CD pipelines.
  • Experience implementing background workers and task queues (Celery, RQ, etc.).
  • Proficiency with Redis for caching, pub/sub, or job queues.
  • Hands‑on experience building and deploying AI applications in production environments.
  • Experience implementing RAG pipelines, AI agent orchestration, model fine‑tuning, and performance monitoring.
  • Familiarity with LLM evaluation techniques and tools for measuring model accuracy, reliability, and safety.

Compensation & Benefits

  • Competitive salary £100,000 – £200,000 GBP + equity.
  • Performance‑based incentives.
  • Opportunity to be instrumental in our expansion into the APAC market.
  • Supportive and innovative work environment.

About the Company

The client is an AI‑native workspace initially designed for investment banking, private equity, consultancies, and asset managers. The company is led by two well‑known founders who have successfully sold their last two YC‑backed companies. They have raised significant funding from Y Combinator and top‑tier venture firms, with live deployments at prestigious global institutions. The team operates across New York, London, and Hong Kong, aiming to become the leading AI application platform for enterprise.

Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London employer: TechTree

Join a pioneering AI-native enterprise that offers a dynamic and innovative work environment, where your contributions will directly impact our expansion into the APAC market. With competitive salaries, equity options, and performance-based incentives, we prioritise employee growth and collaboration, ensuring you thrive alongside industry leaders in a supportive culture. Located in vibrant hubs like London, you'll have the opportunity to work with cutting-edge technology and mentor junior developers, making this an ideal place for those seeking meaningful and rewarding employment.
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Contact Detail:

TechTree Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London

✨Tip Number 1

Network like a pro! Reach out to your connections in the tech world, especially those who might know someone at the company. A personal introduction can make all the difference in getting your foot in the door.

✨Tip Number 2

Show off your skills! Create a portfolio showcasing your best projects, especially those involving React and Python. Make sure to highlight any AI applications you've built – this is a hot topic right now!

✨Tip Number 3

Prepare for the interview by brushing up on your technical skills and understanding of cloud infrastructure. Be ready to discuss your experience with CI/CD pipelines and how you’ve tackled scalability and performance issues in past projects.

✨Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we love seeing candidates who take that extra step to connect with us directly.

We think you need these skills to ace Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London

React
Next.js
Python
Django
FastAPI
CI/CD Pipelines
Cloud Infrastructure (AWS, GCP, Azure)
Docker
Kubernetes
Redis
Celery
AI Applications Development
RAG Pipelines
Model Fine-Tuning
Data Pipelines

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your experience with React, Python, and any relevant cloud technologies. We want to see how your skills align with what we're looking for, so don’t be shy about showcasing your best projects!

Craft a Compelling Cover Letter: Your cover letter is your chance to tell us why you’re the perfect fit for this role. Share your passion for AI and how your background in full-stack development can contribute to our mission. Keep it engaging and personal!

Showcase Your Projects: If you've worked on any AI applications or have experience with CI/CD pipelines, make sure to include those in your application. We love seeing real-world examples of your work, so links to GitHub or live demos are a big plus!

Apply Through Our Website: We encourage you to apply directly through our website. It’s the easiest way for us to keep track of your application and ensures you get all the latest updates from our team. Plus, we can’t wait to hear from you!

How to prepare for a job interview at TechTree

✨Know Your Tech Stack Inside Out

Make sure you’re well-versed in React, Next.js, and Python. Brush up on your knowledge of backend services and APIs, especially with Django and FastAPI. Be ready to discuss your past projects and how you’ve tackled challenges using these technologies.

✨Showcase Your Collaboration Skills

This role involves working closely with various teams, so be prepared to share examples of how you've collaborated with designers, growth teams, and other engineers. Highlight any mentoring experiences you’ve had with junior developers to demonstrate your leadership abilities.

✨Demonstrate Your Problem-Solving Approach

Be ready to discuss how you ensure scalability, performance, and security in your applications. Prepare to talk about specific instances where you implemented CI/CD pipelines or automated testing, and how these practices improved your workflow.

✨Familiarise Yourself with AI Applications

Since the company focuses on AI-powered features, brush up on your experience with AI applications. Be prepared to discuss RAG systems, model fine-tuning, and any relevant tools you’ve used for evaluating model performance. This will show your alignment with their innovative goals.

Senior Full-Stack Engineer (React/Python) (+ Equity) at YC-backed AI-native enterprise in London
TechTree
Location: London

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