Software Engineer, Platform

*HQ - San Francisco, CA on site Until 9/13/2026 3+ years exp H-1B sponsor history First posted March 20, 2025 Last posted July 15, 2026
Job description

About Cartesia

Our mission is to architect AI that learns from and interacts with the world like humans do.

We're pioneering the model architectures that will make this possible. Our founding team met as PhDs at the Stanford AI Lab, where we invented State Space Models or SSMs, a new primitive for training efficient, large-scale foundation models. Our team combines deep expertise in model innovation and systems engineering paired with a design-minded product engineering team to build and ship cutting edge models and experiences.

We're funded by leading investors at Index Ventures and Lightspeed Venture Partners, along with Factory, Conviction, A Star, General Catalyst, SV Angel, Databricks and others. We're fortunate to have the support of many amazing advisors, and 90+ angels across many industries, including the world's foremost experts in AI.

About the Role

We're hiring a Software Engineer, Platform to advance our mission of building real-time multimodal intelligence.

Your Impact

  • Design and build low latency, scalable, and reliable model inference and serving stack for our cutting edge SSM foundation models

  • Work closely with our research team and product engineers to translate cutting edge research into incredible products

  • Build highly parallel, high quality data processing and evaluation infrastructure for foundation model training

  • You'll have significant autonomy to shape our products and directly impact how cutting-edge AI is applied across various devices and applications.

What You Bring

Given the scale and difficulty of problems we work on, we value strong engineering skills at Cartesia.

  • Strong engineering skills, comfortable navigating complex codebases and monorepos.

  • An eye for craft and writing clean and maintainable code.

  • You're comfortable diving into new technologies and can quickly adapt your skills to our tech stack (Go and Python on the backend, Next.js for the frontend).

  • Experience building large-scale distributed systems with high demands on performance, reliability, and observability.

  • Technical leadership with the ability to execute and deliver zero-to-one results amidst ambiguity.

  • [bonus] Background in or experience working with machine learning and generative models.

Even if you donโ€™t meet every requirement above, we'd encourage you to apply.

Note: Cartesia participates in E-Verify and will provide the federal government with Form I-9 information to confirm employment eligibility after hire.

More Details

๐Ÿข In-office policy: Weโ€™re an in-person team based out of offices in ๐Ÿ‡บ๐Ÿ‡ธ San Francisco, ๐Ÿ‡ฌ๐Ÿ‡ง London and ๐Ÿ‡ฎ๐Ÿ‡ณ Bangalore. We love being in the office, hanging out together, and learning from each other every day.

๐ŸŒŽ Visa sponsorship: We provide visa sponsorship support and assess each circumstance on a case-by-case basis. However, visa sponsorship is dependent on many factors, including the role you are applying for, and the location you are going to be based, and so we can't always guarantee success. Your Recruiter will work with you to understand your visa sponsorship needs from the first call.

๐Ÿšข We ship fast. All of our work is novel and cutting edge, and execution speed is paramount. We have a high bar, and we donโ€™t sacrifice quality or design along the way.

๐Ÿค We support each other. We have an open & inclusive culture thatโ€™s focused on giving everyone the resources they need to succeed.

Our Benefits (US Employees Only)

๐Ÿ’ฐ Compensation Competitive base salary alongside attractive equity package.

๐Ÿฉบ Health Insurance Fully covered medical insurance along with dental and vision for you and your family.

๐Ÿง‘โ€๐Ÿง‘โ€๐Ÿง’โ€๐Ÿง’ Parental Leave 9 weeks paternity & 12 weeks maternity leave

๐Ÿฆ 401(k)

๐Ÿš† Commuter Allowance A monthly stipend to help you get to and from the office.

๐Ÿ–๏ธ Flexible PTO Take as much time as you need to recharge your batteries.

๐Ÿฒ Meals & Snacks Lunch, dinner and plenty of snacks, provided daily.

๐Ÿฆ– Your own personal Yoshi

Our Commitment to Equal Opportunity

Cartesia is an equal opportunity employer. We consider qualified applicants without regard to race, color, religion, sex, national origin, age, disability, veteran status, genetic information, or any other legally protected status.

Compensation (from employer):
$180K โ€“ $250K โ€ข Offers Equity

About this role

Summary

Build scalable, low latency ML inference systems and infrastructure for AI models.

Job title

Software Engineer, Platform

Experience level

middle to senior level

Minimum experience

3+ years exp

Industry

artificial intelligence

Location requirements

Must be based in San Francisco, CA; in-office work required.

Salary

$180kโ€“$250k

Visa sponsorship

H-1B sponsor history

Management role

No

Skills & keywords

Required skills

GoPythondistributed systemsperformancereliabilityobservability

Preferred skills

machine learninggenerative models

Specializations

distributed systemsmodel inferencescalabilityperformancegenerative models
Locations

Structured locations inferred from the posting.

San Francisco, CA, USA

On-site City