Fullstack Developer (.NET C#)
Fullstack Developer (.NET C#)

Fullstack Developer (.NET C#)

Part-Time 72000 - 168000 £ / year (est.) No home office possible
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At a Glance

  • Tasks: Design and build an AI-powered platform from scratch, creating intuitive user experiences.
  • Company: Join a stealth-mode AI start-up backed by top-tier VCs, revolutionising consumer tech.
  • Benefits: Enjoy a competitive salary, generous stock options, and flexible office days.
  • Why this job: Be part of a mission-driven team shaping the future of personalised shopping with cutting-edge AI.
  • Qualifications: Strong experience in frontend and backend development; a product-minded, fast-learning engineer.
  • Other info: Work closely with co-founders in a high-trust environment, experimenting with modern AI tools.

The predicted salary is between 72000 - 168000 £ per year.

Founding Full Stack Engineer – We are working with a stealth-mode, consumer AI start-up backed by top-tier US and European VCs to find a Full Stack Engineer to join the Founding team. Their mission is to help people make smarter spending decisions with the help of AI agents that understand their needs, habits and trusted social circles. They are building a completely new kind of shopping experience—deeply personalized, socially intuitive, and powered by the latest in generative AI. This is a massive, untapped opportunity in a $1tr+ category.

They are looking for a Founding Full Stack Engineer to help shape the product, stack and culture from day one. You don’t need to cover all of the below as what they are looking for most are Full Stack Engineers with a product-mindset, a bias for action who enjoys building things from scratch and learning as you go!

What you’ll do as a Founding Full Stack Engineer:

  • You will design and build the alpha version of their AI-powered platform from the ground up.
  • Design, prototype and ship fast, customer-validated features across frontend and backend.
  • Craft seamless, mobile-first experiences that feel intuitive, fast and personal.
  • Experiment with GenAI tooling to supercharge your workflow and product capabilities.
  • Collaborate closely with the cofounders in a small, high-trust, mission-driven team.

What they’re looking for in a Founding Full Stack Engineer:

  • Strong experience building polished frontend and scalable backend systems.
  • A 0→1 mindset: You’ve launched things from scratch, either at startups or on your own and enjoy fast iteration cycles, direct user feedback, and high ownership.
  • Comfort using modern AI tools and platforms in your workflow.
  • A customer-obsessed, fast-learning engineer who cares about real-world impact.

Tech Stack:

  • Frontend: React Native, Expo, TypeScript, Redux
  • Backend: Azure, .NET Core, Docker, C#, SignalR

They are pragmatic about using the right tool for the job and while the backend relies heavily on the Microsoft stack they actively consider other languages like Python for data-heavy tasks, Go for microservices or Rust where performance is key. They are constantly evolving their GenAI toolkit and are currently using Cursor, CLINE, Windsurf.

This is a fantastic opportunity for a Founding Full Stack Engineer to join a well-funded AI start-up. Please reply with your CV or call Simon for a chat.

Fullstack Developer (.NET C#) employer: Burns Sheehan

Join a pioneering consumer AI start-up in London as a Founding Full Stack Engineer, where you'll have the unique opportunity to shape the product and culture from the ground up. With a strong emphasis on innovation, collaboration, and personal growth, the company offers a dynamic work environment that encourages experimentation and direct user feedback, alongside competitive compensation and generous stock options. Experience the thrill of building something radically new while working closely with visionary co-founders in a mission-driven team dedicated to transforming the shopping experience.
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Contact Detail:

Burns Sheehan Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Fullstack Developer (.NET C#)

✨Tip Number 1

Familiarise yourself with the specific technologies mentioned in the job description, such as .NET Core, Azure, and React Native. Having hands-on experience or personal projects that showcase your skills in these areas can set you apart from other candidates.

✨Tip Number 2

Demonstrate your 0→1 mindset by preparing examples of projects where you've built something from scratch. Be ready to discuss how you approached challenges, iterated based on user feedback, and what impact your work had on the end-users.

✨Tip Number 3

Show your enthusiasm for AI and consumer tech by staying updated on the latest trends and tools in the industry. Mention any relevant AI tools you've experimented with, as this will highlight your proactive approach and passion for the field.

✨Tip Number 4

Prepare to discuss your collaborative experiences, especially in small teams. Highlight instances where you've worked closely with co-founders or stakeholders, as this aligns with the company's mission-driven culture and their need for a high-trust environment.

We think you need these skills to ace Fullstack Developer (.NET C#)

.NET Core
C#
Azure
React Native
TypeScript
Python
Docker
SignalR
Frontend Development
Backend Development
User Experience Design
Agile Methodologies
Problem-Solving Skills
Collaboration Skills
Customer-Centric Mindset
Adaptability
Fast Iteration Cycles
AI Tools and Platforms

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your experience with .NET Core, Azure, and the other technologies mentioned in the job description. Showcase any projects where you've built applications from scratch or worked in a startup environment.

Craft a Compelling Cover Letter: Write a cover letter that reflects your passion for AI and consumer tech. Explain why you're excited about this opportunity and how your skills align with their mission to create a new shopping experience.

Showcase Your Projects: Include links to your GitHub or portfolio where you can demonstrate your previous work, especially any projects that involved building full-stack applications or using modern AI tools.

Highlight Your Mindset: In your application, emphasise your 0→1 mindset and your ability to iterate quickly based on user feedback. Share examples of how you've taken ownership of projects and contributed to their success.

How to prepare for a job interview at Burns Sheehan

✨Showcase Your Product Mindset

During the interview, emphasise your experience with building products from scratch. Share specific examples of projects where you took ownership and iterated based on user feedback. This will demonstrate that you align with their 0→1 mindset.

✨Familiarise Yourself with Their Tech Stack

Make sure to brush up on the technologies mentioned in the job description, especially .NET Core, Azure, and React Native. Being able to discuss how you've used these tools in past projects will show your technical competence and readiness for the role.

✨Demonstrate Your AI Knowledge

Since the company is focused on AI, be prepared to discuss your experience with AI tools and platforms. Highlight any relevant projects or experiments you've conducted using generative AI, as this will showcase your ability to innovate within their framework.

✨Prepare Questions for the Cofounders

Engage with the cofounders by preparing thoughtful questions about the company's vision and culture. This not only shows your interest in the role but also helps you assess if the company's mission aligns with your values and career goals.

Fullstack Developer (.NET C#)
Burns Sheehan
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