# Member of Technical Staff - Pre-Training Data at Reflection AI

- Company: Reflection AI
- What the company does: Make intelligence open and accessible to all. Backed by Battery, Lightspeed and Sequoia.
- Company website: https://reflection.ai/
- Type: Startups (AI role)
- Level: Senior
- Location: San Francisco, CA
- Work setup: On-site
- Posted: 2026-10-22
- Apply by: 2026-12-06
- Apply: https://jobs.ashbyhq.com/reflectionai/2b0b0fbf-0e82-4212-be2e-36e4ca37756c?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/reflection-ai-member-of-technical-staff-pre-training-data/

## About the role

Design and implement techniques for sourcing, curating, and filtering large-scale web, text, and code data, with opportunities to extend into other modalities as our models evolve. Develop data quality metrics and analyses that measure coverage, diversity, and representativeness across sources. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- Proficiency in Python and familiarity with at least one deep learning framework (e.g., PyTorch or JAX), with experience debugging distributed workloads and writing code that scales
- Bachelor’s degree or equivalent experience in Computer Science, Machine Learning, Physics, Mathematics, or a related discipline with strong theoretical and empirical grounding
- Clear written communication and the ability to explain complex technical ideas
- A strong grasp of probability, statistics, and ML fundamentals, and the ability to tell real effects from noise and bugs in experimental data
- Experience with curation, preprocessing, and analysis of large-scale text or code datasets, exposure to multimodal data is a plus

Tags: Research

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/reflection-ai-member-of-technical-staff-pre-training-data/