2x founder

Luke Johnston

Co-founder @ Cajal (YC W26)

Founder

Cajal· Winter 2026 🇺🇸 San Francisco, California, United States

in LinkedIn 𝕏 @CajalResearch

2026W26· Y Combinator

Founder · since 2025

Company

Y Combinator

Role

W26

Stage

—

no public source

Raised

—

no public source

Based

—

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

Cajal

Scaling formal verification to accelerate scientific discovery

Winter 2026

Experience

Career

Cajal
Co-founder
Co-Founder · 2025 – Present
2025
Y Combinator
W26 · 2026
2026
Entrepreneurs First
Founder
Founder in Residence · Bückeburg / San Francisco · 2025
2025
Google
Course Instructor · 2025
2025
UCL
Research Intern · 2024 – 2025
2024
Eurofins
Data Scientist · 2021 – 2022
2021
Oxford e-Research Centre
Machine Learning Intern · 2021
2021
Scholars X Corporation
Lecturer · 2020 – 2021
2020

Bio

Working on formal verification and AI at Cajal (W26). Background in machine learning and neuroscience at research labs in Oxford/Cambridge/UCL. Learn more at https://caj.al/ and feel free to get in touch at luke@caj.al