Founding Engineer at Taxnova at Jack & Jill/External ATS

London, England, United Kingdom -

Full Time

Start Date

Immediate

Expiry Date

05 Jun, 26

Salary

0.0

Posted On

07 Mar, 26

Experience

0 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

AI Infrastructure, LLMs, RAG, Graph Analysis, Agentic Systems, Full-Stack Engineering, Backend Systems, Frontend User Interfaces, Cloud Infrastructure, Data-Intensive Systems, Vector Search, Evaluations, Technical Architecture, Product Roadmap

Industry

Staffing and Recruiting

Description

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. Founding Engineer Company Description: VC-backed AI fintech startup Job Description: As the first engineering hire, you will build the AI infrastructure layer for global innovation incentives. You will transform messy, unstructured data from tools like GitHub and Jira into audit-proof technical narratives using LLMs. This role offers the unique opportunity to shape the product roadmap and technical architecture from the ground up. Location: London, UK Why this role is remarkable: Join as the first engineering hire working directly with founders to shape the product roadmap and technical architecture. Solve complex technical challenges by building agentic AI systems that process millions of data points into structured evidence. Backed by top-tier VCs and prominent tech executives, the company is already serving high-growth clients and scaling rapidly. What you will do: Design and build data-intensive agentic systems and workflows using LLMs, RAG, and graph analysis. Own the core AI product from cloud infrastructure to backend systems and frontend user interfaces. Scale the platform to support enterprise customers and expansion into international tax incentive regimes. The ideal candidate: Strong full-stack software engineering background with experience building production-grade systems from scratch. Hands-on experience implementing LLMs at the application layer, including agents, evaluations, and vector search. High-agency mindset with a bias toward action and the ability to make confident technical trade-offs. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. Next steps Step 1. Visit our website. Step 2. Click 'Talk to Jack'. Step 3. Talk to Jack so he can understand your experience and ambitions. Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role. Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction. Step 6. If not, Jack will find you excellent alternatives. All for free. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.

Responsibilities

The first engineering hire will be responsible for building the AI infrastructure layer to transform unstructured data into audit-proof technical narratives using LLMs. This involves designing and building data-intensive agentic systems and owning the core AI product from infrastructure to user interfaces.