Skip to profile
London, UK

Stef L.

Fractional CTO / tech lead working on applied AI

I’m an experienced early-stage startup tech/product lead with a mix of overlapping skills in software development, design, and business model innovation.

Throughout my career, I’ve sought to find repeatable ways to discover new opportunities, prototype and develop early-stage tech startups and scale them to have an impact on solving problems the world faces.

Hire Stef
Stef L.

Work

Oak National Academy — rapid launch & generative-AI for teachers

thenational.academy
Oak National Academy — rapid launch & generative-AI for teachers
Day‑1 code committer on a small team that built and shipped Oak V1 in one week during the COVID lockdown and then helped it scale to supporting ~5m children monthly to learn online during lockdown; the platform later became an arms‑length government‑funded department and is now used in 72% of UK schools. I prototyped and then helped build and scale one of the UK government’s first applications of generative AI in education — a teacher-facing tool to co-generate curriculum-aligned teaching resources. The work supported rapid, large‑scale remote learning adoption at the pandemic peak and then has now become a valuable resource for teachers.

Translucent - Multi-entity financial data platform

translucent.io
Translucent - Multi-entity financial data platform

Translucent is the CFO super-app that solves the everyday problems of finance teams. Connect to your existing accounting solutions to create a single system of record.

Led the development of the first prototype, wrote the first lines of code, hired the early team, enabled the company to raise $9m seed, got to first revenue, handed over to ongoing leadership.

Experience

Jan 2025 — Apr 2025
Pre-launch conversational AI startup

Pre-launch conversational AI startup

Fractional Applied AI CTO / Lead Engineer

Fractional advisory for a pre-launch early stage conversational AI startup - featuring real-time transcription, live response generation by an assistant during conversation.

Jan 2024 — Apr 2025
Aila - Oak National Academy

Aila - Oak National Academy

Fractional Applied AI Engineer

Helped develop one of the first publicly released generative AI tools via the UK government. An AI assistant to help teachers develop resources to use in their lessons, based on an open API and database of content developed by Oak National Academy.

Mar 2021 — Sep 2022
On Deck

On Deck

Director of Platform

Where top tech talent goes to explore what’s next.

Mar 2020 — Mar 2021
Oak National Academy

Oak National Academy

Head of Engineering

When COVID hit, I helped build a platform to support 4.5M children per month to continue learning online.

Aug 2018 — Apr 2020
ING Bank

ING Bank

Venture Builder

A pioneer in digital banking for retail and wholesale clients, driving innovation and sustainability initiatives.

Sep 2016 — Aug 2018
Rainmaking

Rainmaking

Venture Builder

We unleash the power of entrepreneurship to solve big problems with the world’s leading companies.

Jan 2013 — Jan 2015
Makeshift.io

Makeshift.io

Founder and Chief Technology Officer

Startup studio building and testing digital products on repeat

Mar 2009 — Mar 2012
Aframe

Aframe

Technical Co-founder

Co-founded a media collaboration platform startup which raised over $15m of investment.