Intern at Isidor (London, United Kingdom)
Isidor· London, United Kingdom·
Job description
Isidor is looking for an intern to join our London office (Soho) for immediate start, full-time, in-person. Required background is in investment banking and/or private equity (at minimum, internship experience at top-tier institutions). Excellent financial modelling skills are necessary.
- Key terms:
- Start: Dec-2025 / early Jan-2026 (as soon as possible)
- Duration 3-6 months (flexible)
- Pay: $6,500 pcm
About Us
Isidor is building the foundation of reliable AI. We believe that the next leap in AI depends as much on understanding and measuring model behavior as it does on model size. To make AI trustworthy, we need systems that verify outputs, benchmark performance, and automate evaluation across billions of examples.
Isidor was founded by engineers and researchers who care deeply about precision, transparency, and scientific rigor. We are a small, fast-moving team working directly with frontier AI labs and enterprise to make evaluation as measurable and reproducible as training itself.
Website: www.isidor.ai
Founded in September 2025, Isidor raised an oversubscribed $3.6m pre-seed from leading funds including Gradient Ventures, futurepresent and Seedcamp, along with angels from Google DeepMind, Perplexity, KKR, Balyasny, Perella Weinberg and more.
Why work at Isidor
- Culture: Tight-knit, fast-moving team of engineers and researchers who value precision, transparency, and scientific rigor. Emphasis on ownership and wearing many hats.
- Work Policy: Full-time, in-office in London (in-person), with potential relocation to San Francisco in H1 2026 (visa support provided).
- Notable Perks: Relocation package, housing bonus (if within 3 miles of the London office), competitive salary + equity.
- Impact: Direct influence on the development of next-generation AI models and frontier research; systems built here will be used by top AI labs globally.