AI Hiring Index

Perplexity · Research · Intern · Posted 2026-09-02

Internship - Machine Learning Research Engineer

Perplexity · Berlin

Apply on Perplexity's site Watch Perplexity for new roles

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).

New research roles at AI companies, every Monday. The week's openings in this function across 286 companies, plus the weekly index. Free.

More research roles at Perplexity

See also: Research Engineer jobs · AI jobs in Berlin · Perplexity salaries · PyTorch jobs · RAG jobs · Distributed training jobs.

This listing is reproduced from Perplexity's public careers feed and links to the original. AI Hiring Index is not the employer and does not accept applications. All Perplexity roles · AI salaries.