Software Engineer, Data Infrastructure

About the role

Data is the lifeblood of our models, and we are looking for a Software Engineer, Data Infrastructure to own the strategy and execution for all data at Cartesia. In this highly impactful role you will build and evolve the datasets that power our cutting‑edge research, designing scalable systems to acquire, process, and curate massive multimodal datasets while partnering closely with research and inference teams.

Key responsibilities

• Define Cartesia's multi‑modal data strategy across pre‑training and post‑training, spanning human, synthetic, and web‑scale sources, with particular depth in audio.
• Design and operate scalable, high‑throughput data pipelines for text, audio, and video covering ingestion, preprocessing, augmentation, dataset versioning, and data loading for training.
• Partner closely with research and inference teams so data systems are co‑designed with training and serving infrastructure (batching, GPU‑aware loading, evaluation pipelines).
• Establish and enforce rigorous standards for data quality, maintaining a tight feedback loop between dataset characteristics and model behavior.
• Identify and source novel datasets; manage relationships and budgets with external data vendors and partners.

Required profile

• Hands‑on experience with ML data infrastructure: training data pipelines, dataset versioning, large‑scale data loading, and the interplay between data systems and model training and inference.
• Working knowledge of multimodal data, especially audio formats, preprocessing, augmentation, and large‑scale storage and streaming patterns.
• Strong modern engineering execution: clean, well‑tested code, fluency with current tools, and the ability to choose the right tool for the problem.
• Experience leading cross‑functional technical efforts in a fast‑moving, research‑driven environment.
• Familiarity with building and evaluating datasets for generative models and a reasonable understanding of how they are trained and inferred.

What we offer

• Competitive base salary alongside an attractive equity package.
• Fully covered medical, dental, and vision insurance for you and your family.
• Parental leave (9 weeks paternity, 12 weeks maternity).
• 401(k) retirement plan.
• Monthly commuter allowance.
• Flexible PTO and daily meals & snacks.