Internship - Machine Learning Research Engineer
at Perplexity
- Location
- Berlin
- Mode
- On-site
- Level
- Intern
- Posted
- Sep 2, 2026
You’ll apply on the company’s own site.
- pytorch
- distributed-training
- rag
- retrieval-ranking
- representation-learning
- contrastive-learning
- multimodal
Pay context
Intern Research roles on this board that post annual USD salaries: median $133k, middle half $133k–$150k, across 8 postings from 3 companies.
Hiring at Perplexity
50 open AI roles listed here · 18 added in the past 30 days · 4 remote.
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).
You’ll apply on the company’s own site.