# Member of Technical Staff

**Company:** [Perplexity](https://hotfix.jobs/companies/perplexity)
**Location:** Belgrade, Serbia, London, United Kingdom, Berlin, Germany
**Role:** ML Engineering
**Experience:** 5+ years
**Skills:** Machine Learning, Search Systems, Information Retrieval, Recommender Systems, Ranking Models, Classification Models, LLMs, RAG, Model Deployment, Python
**Posted:** 2025-03-25

> Build and deploy retrieval, ranking, classification, and LLM-based systems that improve large-scale search quality. The role requires deep search or recommender-systems expertise and at least five years of relevant project experience.

## Job Description

## Responsibilities
- Push search quality forward through models, data, tools, and other leverage.
- Architect and build core components of the search platform and model stack.
- Train and evaluate retrieval, ranking, and classification models, including large language models (LLMs).
- Deploy models—from boosting to LLMs—in a scalable and performant way.
- Build and optimize retrieval-augmented generation (RAG) pipelines for grounding and answer generation.
- Collaborate with Data, AI, Infrastructure, and Product teams to deliver quickly and with high quality.

## Requirements
- Deep understanding of search and retrieval systems, including quality evaluation principles and metrics.
- Proven track record with large-scale search or recommender systems.
- Self-driven, with a strong sense of ownership and execution.
- Minimum of 5 years working on search- or recommender-system-related projects.

## Similar jobs

- [AI Software Engineer](https://hotfix.jobs/jobs/c9a0e889-a36e-488f-87d0-e9c27ab63bf0) - Rollstack - Remote
- [Applied AI Engineer, Digital Natives](https://hotfix.jobs/jobs/74eb3e31-bab1-479e-90e1-2e172658343a) - OpenAI - London, United Kingdom
- [Agent Engineer](https://hotfix.jobs/jobs/627cc378-6ac6-467e-bbf0-2c07738ae0a5) - Elliptic - London, United Kingdom
- [AI Engineer - New Verticals](https://hotfix.jobs/jobs/4159c72e-536e-4211-969c-6bcb9ad805fd) - Protege - Remote
- [ML Operations Engineer](https://hotfix.jobs/jobs/f4bb035d-d3fe-4f5a-9f21-9ee2f0f079b5) - DeepIntent - Belgrade, Serbia

**Apply:** https://hotfix.jobs/jobs/80fc0270-c8fc-4c82-85de-01a26ecc8c7b
**Canonical:** https://hotfix.jobs/jobs/80fc0270-c8fc-4c82-85de-01a26ecc8c7b