Member of Technical Staff (Data Scientist, Evals)
Perplexity · London, United Kingdom · AI
About this role
Perplexity is hiring a staff-level Staff Engineer in the software engineering function based in London, United Kingdom. The posting calls out experience with Python, SQL, AWS, LLMs and roughly 4+ years of relevant work. Listed education preference: a master's degree or equivalent.
- Role
- Staff Engineer
- Function
- software engineering
- Level
- staff
- Track
- Tech leadership
- Employment
- Full-time
- Location
- London, United Kingdom
- Experience
- 4+ years
- Education
- Master's degree
- Department
- AI
- Posted
- Feb 13, 2026
More roles at Perplexity
Job description
from Perplexity careersPerplexity serves tens of millions of users daily with reliable, high-quality answers grounded in an LLM-first search engine and our specialized data sources. We aim to use the latest models as they are released, but the intelligence frontier is a jagged one, and popular benchmarks do not effectively cover our use cases. In this role, you will build specialized evals to improve answer quality across Perplexity, covering search-based LLM answers and other scenarios popular with our users.
Responsibilities
Architect and maintain automated evaluation pipelines to assess answer quality across Perplexity's products, ensuring high standards for accuracy and helpfulness
Design evaluation sets and methods specifically to measure the impact of tool calls (particularly web search retrieval) on the final answer's quality
Develop VLM-based solutions to programmatically evaluate how final answers render visually across different platforms and devices
Continuously review public benchmarks and academic evaluations for their applicability to the Perplexity product, adapting and incorporating them into our regular performance measurements
Operate within a small, high-impact team where your evaluation metrics directly shape product changes, collaborating closely with technical leadership to measure and improve Answer Quality
Qualifications
PhD or MS in a technical field or equivalent experience
4+ years of experience in data science or machine learning
This is an excerpt. Read the full job description on Perplexity careers →