# Internship - Machine Learning Research Engineer at Perplexity

Perplexity is hiring an Internship - Machine Learning Research Engineer for a remote role open to applicants in Germany. Level rates it Builds AI ●●●●; you can [apply on Perplexity](https://jobsbylevel.com/go/0e7b9b0b-db4f-43e8-95d2-a603e4f45530?utm_medium=ai-agent).

AI Level 4, AI centrality 95 out of 100. Remote (Berlin).

## Details

- Company: [Perplexity](https://jobsbylevel.com/companies/perplexity)
- AI level: AI Level 4 (score 95 out of 100)
- Location: Remote (Berlin)
- Posted: September 2, 2026
- Apply: https://jobsbylevel.com/go/0e7b9b0b-db4f-43e8-95d2-a603e4f45530?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=internship-machine-learning-research-engineer-at-perplexity-fb95e0

## Prepare for this job

The job page lists 5 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/internship-machine-learning-research-engineer-at-perplexity-fb95e0

## Description

Internship Program Berlin Internship program: 12 - 24 weeks, full-time, in-person in the Berlin office. Responsibilities Relentlessly push search quality forward — through models, data, tools, or any other leverage available. 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 research in representation learning, including contrastive learning, multilingual, evaluation, and multimodal modeling for search and retrieval. Build and optimize RAG pipelines for grounding and answer generation. Qualifications Understanding of search and retrieval systems, including quality evaluation principles and metrics. Strong proficiency with PyTorch, including experience in distributed training techniques and performance optimization for large models. Interested in representation learning, including contrastive learning, dense & sparse vector representations, representation fusion, cross-lingual representation alignment, training data optimization and robust evaluation. Publication record in AI/ML conferences or workshops (e.g., NeurIPS, ICML, ICLR, ACL, EMNLP, SIGIR).

Source: https://jobsbylevel.com/jobs/internship-machine-learning-research-engineer-at-perplexity-fb95e0

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Level. https://jobsbylevel.com/jobs/internship-machine-learning-research-engineer-at-perplexity-fb95e0.

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