Perplexity logo

Internship - Machine Learning Research Engineer

Perplexity · Berlin

Location
Berlin
Funding
$1.5B
Posted
Sep 2, 2026

Perplexity is hiring a Internship - Machine Learning Research Engineer based in Berlin. Every apply link on Engg.space goes straight to the company's own careers page - no recruiter middleman, no generic job-board form.

Apply directly at Perplexity

Role details

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).

More roles at Perplexity

Link
Member of Technical Staff (TPM, Inference)3 days ago
San Francisco
$170K - $265K$1.5BApply
Member of Technical Staff (Search Quality Analyst)3 days ago
Belgrade
N/A$1.5BApply
Member of Technical Staff (AI Software Engineer, Agents)26-08-2026
San Francisco
$220K - $405K$1.5BApply
Member of Technical Staff (Software Engineer, Desktop Apps)26-08-2026
San Francisco
$200K - $400K$1.5BApply
Member of Technical Staff (Software Engineer, Model Platform)25-08-2026
San Francisco
$220K - $405K$1.5BApply
Member of Technical Staff (Software Engineer, Multimodal)12-08-2026
San Francisco
$220K - $405K$1.5BApply
Member of Technical Staff (Machine Learning Engineer, Ranking Quality - Search)12-08-2026
Belgrade
N/A$1.5BApply
Engineering Manager (TLM, Agents)12-08-2026
San Francisco
$300K - $405K$1.5BApply
Member of Technical Staff (Software Engineer, Acceleration)12-08-2026
San Francisco
$250K - $405K$1.5BApply
Member of Technical Staff (Software Engineer, API Platform)12-08-2026
San Francisco
$220K - $405K$1.5BApply
Engineering Manager (API Platform)12-08-2026
San Francisco
$300K - $405K$1.5BApply
Member of Technical Staff (Software Engineer, Design System)11-08-2026
San Francisco
$220K - $405K$1.5BApply

Search all engineering roles