Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Build innovative AI-native fintech solutions and shape the future of financial advisory.
- Company: Exciting Blackbird-backed startup transforming finance with cutting-edge technology.
- Benefits: Competitive salary, equity options, and mentorship from industry leaders.
- Other info: Enjoy architectural freedom and choose your growth path in engineering.
- Why this job: Join a pre-seed powerhouse and make a real impact in a fast-growing environment.
- Qualifications: Strong coding skills and experience in fast-paced startup settings.
The predicted salary is between 60000 - 90000 £ per year.
Blackbird-backed AI-native fintech startup transforming financial advisory systems.
As the Founding Engineer, you will establish the foundational software architecture for an AI-native system of record replacing legacy 1990s software. You’ll own the entire codebase, building end-to-end features across web and mobile platforms. This high-impact role shifts financial advisers from manual tasks to AI-powered reviewers, directly influencing the product roadmap.
Location: London, UK
Why this role is remarkable:
- Join a pre-seed powerhouse with $2.7M raised from Blackbird (the largest investor in Canva) and experience explosive 45% month-over-month adoption.
- Unparalleled architectural freedom and influence as a founding team member, working directly with founders to shape the engineering culture and technical vision.
- Dual growth pathways allowing you to choose between a Principal Engineer or Engineering Leadership track with direct mentorship from experienced operators.
What You Will Do:
- Architect and build core product features end-to-end using React Native, .NET Core, and Supabase, with a heavy emphasis on AI-native workflows.
- Develop rich AI-powered interfaces including chat, tool-calling flows, and real-time streaming responses using LLMs like Anthropic and OpenAI.
- Manage the full mobile and web lifecycle, from building native audio recording modules to owning the CI/CD pipeline and release deployments.
The ideal candidate:
- Exceptional full-stack or backend coding talent with a proven track record of shipping production-ready applications in fast-paced startup environments.
- Power user of modern AI development tools for architecting and debugging, with a deep curiosity for optimizing LLM performance and UX.
- Detail-oriented builder who thrives in ambiguity, prioritizes in-person collaboration in London, and possesses the business acumen to translate user needs into code.
Founding Engineer (£60k-£90k + Equity) at Blackbird-backed AI-native fintech startup in London employer: Jack & Jill
Contact Detail:
Jack & Jill Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Founding Engineer (£60k-£90k + Equity) at Blackbird-backed AI-native fintech startup in London
✨Tip Number 1
Network like a pro! Reach out to people in the fintech and AI space, especially those connected to Blackbird. Attend meetups or online events to make connections that could lead to job opportunities.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving React Native or AI. This will give potential employers a taste of what you can do and how you think.
✨Tip Number 3
Prepare for technical interviews by brushing up on your coding skills and understanding AI workflows. Practice common coding challenges and be ready to discuss your past projects in detail.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who take the initiative to connect directly with us.
We think you need these skills to ace Founding Engineer (£60k-£90k + Equity) at Blackbird-backed AI-native fintech startup in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Founding Engineer role. Highlight your full-stack or backend coding talent, especially any experience with AI development tools, as this will catch our eye!
Craft a Compelling Cover Letter: Use your cover letter to tell us why you’re excited about joining our AI-native fintech startup. Share your passion for transforming financial advisory systems and how your background makes you the perfect fit for this high-impact role.
Showcase Your Projects: If you've worked on relevant projects, whether personal or professional, make sure to include them in your application. We love seeing real examples of your work, especially if they demonstrate your ability to build end-to-end features or use modern tech stacks.
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 out on any important updates about the hiring process!
How to prepare for a job interview at Jack & Jill
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, like React Native, .NET Core, and Supabase. Brush up on your knowledge of AI-native workflows and be ready to discuss how you've used these tools in past projects.
✨Showcase Your Problem-Solving Skills
Prepare to share specific examples of how you've tackled challenges in fast-paced startup environments. Think about times when you had to make quick decisions or adapt to changing requirements, as this role will require a lot of flexibility.
✨Demonstrate Your Passion for AI
Since this role heavily involves AI, be prepared to discuss your experience with AI development tools and your curiosity about optimising LLM performance. Share any personal projects or research that highlight your enthusiasm for AI technology.
✨Ask Insightful Questions
Prepare thoughtful questions about the company’s vision, the product roadmap, and the engineering culture. This shows your genuine interest in the role and helps you assess if the company aligns with your career goals.