At a Glance
- Tasks: Build innovative financial tech solutions with autonomous AI for B2B platforms.
- Company: Exciting pre-seed startup targeting a $100B market shift.
- Benefits: Join at the ground floor with full ownership and growth potential.
- Other info: Fast-paced environment with direct collaboration alongside the founder.
- Why this job: Be part of a game-changing venture and shape the future of fintech.
- Qualifications: Senior Engineer with experience in early-stage product development and LLMs.
The predicted salary is between 36000 - 60000 £ per year.
A pre-seed, founder-led startup is seeking a Founding Engineer to build the "Agentic Financial Ops" layer for the global fintech market. This stealth-mode venture is embedding autonomous AI agents directly into major B2B platforms—automating invoicing, bill pay, and payroll for SMBs. This is an opportunity to join at the ground floor of a company targeting a $100B market shift.
What you will build:
- The Engine: A white-label, API-first, multi-tenant system designed to embed cleanly and securely into partner ecosystems.
- The Intelligence: You aren’t just calling APIs; you are treating LLMs as infrastructure. You will build agentic workflows that handle complex financial operations autonomously.
- The Foundation: You will replace the founder’s initial "vibe-coded" prototype with a robust, production-ready architecture. You decide the stack; you set the engineering culture.
The Founders:
- The Commercial Engine: A domain expert and "straight talker" (formerly VP at a successful embedded finance scale-up). They have already secured signed contracts across the UK, US, and Europe—and early revenue—before the API is even live. They bring the pipeline, the deep market knowledge, and the capital; you bring the product.
The Role:
- This is not a ticket-taking role at a stagnant SaaS. This is a Decide + Build + Own seat where you sit directly beside the founder.
- Zero to One: Take the product from MVP concept to Production.
- Full Ownership: Build the core platform end-to-end (Backend, APIs, Frontend).
- Architecture: Design for security, permissions, and scale from day one.
- Speed: Iterate fast with real customers. The goal is to launch the API in Q2.
The Profile:
- Mindset: Scrappy, high-growth, and product-minded. You care deeply about why a feature exists, not just how it’s built.
- Experience: A Senior Engineer (Backend-leaning or Full-stack) who has shipped early-stage products into production.
- Tech: Hands-on experience with LLMs.
Founding Engineer employer: numi
numi is an exceptional employer that fosters a collaborative and innovative work culture in the heart of London. With a strong emphasis on mentorship and continuous learning, employees are empowered to grow their skills while enjoying a hybrid work model and comprehensive benefits such as private medical insurance. Joining numi means being part of a dynamic team dedicated to technical excellence and meaningful growth.
StudySmarter Expert Advice🤫
We think this is how you could land Founding Engineer
✨Tip Number 1
Network like a pro! Reach out to people in the fintech space, especially those who are already working at startups. Use platforms like LinkedIn to connect and engage with them—ask questions, share insights, and show your enthusiasm for the industry.
✨Tip Number 2
Show off your skills! Create a portfolio that highlights your past projects, especially those related to building APIs or working with LLMs. This is your chance to demonstrate your hands-on experience and how you can contribute to the team.
✨Tip Number 3
Prepare for interviews by understanding the company’s vision and the specific challenges they face in the fintech market. Be ready to discuss how your background aligns with their goals and how you can help them build that robust platform from scratch.
✨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, it shows you’re genuinely interested in being part of our journey from the ground up.
We think you need these skills to ace Founding Engineer
Some tips for your application 🫡
Show Your Passion:When writing your application, let your enthusiasm for fintech and AI shine through. We want to see that you’re not just looking for a job, but that you’re genuinely excited about building something groundbreaking with us.
Tailor Your Experience:Make sure to highlight your relevant experience in your application. We’re looking for someone who has shipped early-stage products, so don’t be shy about showcasing your past projects and how they relate to what we’re building.
Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon and fluff. Just tell us what you’ve done, what you can do, and why you’d be a great fit for our 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 it gets into the right hands. Plus, it shows you’re serious about joining our adventure!
How to prepare for a job interview at numi
✨Know Your Tech Stack
Make sure you’re well-versed in the tech stack mentioned in the job description. Brush up on your experience with LLMs and be ready to discuss how you've used them in past projects. This shows you’re not just a fit for the role, but that you can hit the ground running.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific challenges you've faced in previous roles, especially in early-stage product development. Use the STAR method (Situation, Task, Action, Result) to structure your answers. This will demonstrate your scrappy mindset and ability to navigate complex problems.
✨Understand the Market
Research the fintech landscape and the specific challenges SMBs face with financial operations. Being able to speak knowledgeably about the market shift and how your role as a Founding Engineer fits into that will impress the founders and show your commitment to the company’s mission.
✨Emphasise Collaboration
Since this role involves working closely with the founder and other team members, highlight your experience in collaborative environments. Share examples of how you’ve contributed to building a positive engineering culture and how you plan to do the same in this new venture.
