Internship - Machine Learning Research Engineer

Perplexity|02 Sep 2026

fulltimeremote

Before you apply

Listed location: Berlin

Work arrangement: remote. A remote label does not confirm worldwide eligibility or visa sponsorship.

Read the employer’s description for qualifications, compensation and work eligibility. Confirm the position is still open on the application page.

Job description supplied by Perplexity; category and skill labels may be inferred. How our listings work · Report a problem

Job 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).

Skills mentioned

PyTorchRAGMultimodal

Frequently asked questions

Is the Internship - Machine Learning Research Engineer position at Perplexity remote?

Yes. The Internship - Machine Learning Research Engineer role at Perplexity is a remote position. Country eligibility is not specified here; check the employer listing.

What type of employment is the Internship - Machine Learning Research Engineer role?

Perplexity is hiring for a full-time Internship - Machine Learning Research Engineer position.

Which skills are mentioned for the Internship - Machine Learning Research Engineer job at Perplexity?

Detected skill labels include PyTorch, RAG, Multimodal. Check the employer description to distinguish required skills from preferred experience.

How do I apply for the Internship - Machine Learning Research Engineer position at Perplexity?

You can apply for the Internship - Machine Learning Research Engineer role directly through Perplexity's official application link provided on this page.