# Member of Technical Staff (Machine Learning Research Engineer)

**Company**: Perplexity
**Location**: Berlin
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Technology

**Apply**: https://jobs.ashbyhq.com/Perplexity/1a3df802-9238-4827-ab1f-12a9d1e4b81c?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/job/member-of-technical-staff-machine-learning-32caf7cf-e85/

## Description

Perplexity is seeking an experienced Machine Learning Research Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking.

## Responsibilities

- Relentlessly push search quality forward , through models, data, tools, or any other leverage available

- Architect and build core components of the search platform and model stack

- Design, train, and optimize large-scale deep learning models using frameworks like PyTorch, leveraging distributed training (e.g., PyTorch Distributed, DeepSpeed, FSDP) and hardware acceleration, with a focus on retrieval and ranking models

- Conduct advanced research in representation learning, including contrastive learning, multilingual, and multimodal modeling for search and retrieval

- Deploy models , from boosting algorithms to LLMs , in a scalable and performant way

- Build and optimize RAG pipelines for grounding and answer generation

- Collaborate with Data, AI, Infrastructure, and Product teams to ensure fast and high-quality delivery

## Qualifications

- Deep understanding of search and retrieval systems, including quality evaluation principles and metrics

- Proven track record with large-scale search or recommender systems

- Strong proficiency with PyTorch, including experience in distributed training techniques and performance optimization for large models

- Expertise in representation learning, including contrastive learning and embedding space alignment for multilingual and multimodal applications

- Strong publication record in AI/ML conferences or workshops (e.g., NeurIPS, ICML, ICLR, ACL, CVPR, SIGIR)

- Self-driven, with a strong sense of ownership and execution

- Minimum of 3 years (preferably 5+) working on search, recommender systems, or closely related research areas

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## Skills

### Required
- PyTorch
- distributed training
- representation learning
- contrastive learning
- multilingual modeling
- multimodal modeling
- search and retrieval systems

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Source: [Apply at jobs.ashbyhq.com](https://jobs.ashbyhq.com/Perplexity/1a3df802-9238-4827-ab1f-12a9d1e4b81c?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)