Machine Learning Engineer

ABOUT COFRAME:

At Coframe, we are building a future where user and agent interfaces can adapt, evolve, and personalize themselves. We are generating revenue, growing rapidly, and trusted by companies you definitely know.

Coframe is a primarily in-person company based in San Francisco, well-capitalized with backing from Khosla Ventures, Nat Friedman, the founder of Android, and others. Our team is small and talent-dense, consisting of competitive programmers, former founders (including our founder who previously co-founded a unicorn), and AI researchers from top institutions who have created some of the most popular open-source code generation projects.

ABOUT THE ROLE:

As a Machine Learning Engineer, you’ll build the models that power performance optimization at Coframe. You’ll train both foundation models and customer-specific models that predict and improve how users engage, click, and convert, and you’ll own each model’s lifecycle end to end: from initial idea, through research and training, to the infrastructure that deploys it.

YOU’RE A GREAT FIT IF YOU HAVE:

- Experience fine-tuning vision-language models (VLMs) or large language models (LLMs)

- Experience training ranking, click-through rate (CTR), conversion, or engagement models

- Strong ML infrastructure experience, including training pipelines, data systems, and model serving

- The ability to own models end to end, from research and experimentation to production deployment

- Strong software engineering fundamentals and experience shipping reliable production systems

- The ability to translate business metrics into modeling objectives and rigorous evaluations

- Curiosity, pragmatism, and excitement about working on problems with no established playbook

- A track record of exceptional achievement, whether in industry, research, or academics

- Experience building agent loops, edge or low-latency model serving, and working with e-commerce, growth, or experimentation teams

WHAT YOU’LL DO:

- Build foundation models and customer-specific models for performance optimization

- Fine-tune VLMs and LLMs to understand and improve digital experiences

- Train ranking, CTR, conversion, and engagement models that guide what Coframe generates and ships

- Own the full model lifecycle, from idea and research through training, evaluation, and deployment

- Build and scale the ML infrastructure for training, serving, and monitoring models in production

- Develop online and offline evaluation systems that tie model performance to real customer outcomes

- Build feedback loops that let models continuously improve from real-world experiment results

- Work with technical and non-technical teams to turn customer goals into models, metrics, and product improvements

BENEFITS:

- Flexible (Unlimited) Paid Time Off

- Top-of-the-line Medical, Dental, and Vision benefits for you and your family

- Life Insurance and Disability Benefits

- 401k Plan with Coframe match

- All meals fully covered in-office

- Gym membership

WHY COFRAME:

Elite Team: Our founder is a serial entrepreneur who previously co-founded a $2B+ unicorn with Tom Brady and guest lectures AI at Stanford. Our team includes researchers from top institutions who created some of the world's most popular open-source code generation projects.

OpenAI: We’re the only marketing technology company officially partnered with OpenAI. Our engineers and researchers work directly with their team to co-train a model specifically for our use case, which is a differentiator, and a testament to the technical caliber of our team.

Inbound Leads: We’re currently growing at 120% QoQ with a consistent flood of inbound demand. We’re looking for the right saleshumans to capture this demand and market opportunity.

Top VCs: We’re backed by tier-1 investors including Khosla Ventures, Nat Friedman (former GitHub CEO), and Rich Miner (Android co-founder). Joining now means getting a seat o