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Internship - Machine Learning Research Engineer

Perplexity · Berlin

Workplace
Hybrid
Job type
Full-time
Posted

About the role

Internship - Machine Learning Research Engineer at Perplexity in Berlin. Hybrid, full-time. Posted September 2, 2026.

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).

Prefer to apply yourself? Apply on Perplexity’s site

Quick answers

Where is this job based?

Berlin. The role is hybrid.

How do you apply?

Apply on Perplexity’s site using the link on this page. With a free Jobmagic account you can see how well you fit first.

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