Alt Platform Inc - Senior Machine Learning Engineer

• 7+ years engineering, with 5+ years building and shipping production ML/AI models • 7+ years • 5+ years building and shipping production ML/AI models • Production-grade Python and SQL, including custom feature-engineering pipelines — not just off-the-shelf scikit-learn. Time-decay weighting, leakage-safe k-fold cross-validation, cascading fallback and imputation logic • Production-grade Python and SQL • Gradient-boosted or ensemble estimators trained and validated against strict accuracy tolerances, with segment-specific tuning by category or asset type • Gradient-boosted or ensemble estimators • LLMs and foundation models in production, for both internal tooling and user-facing product • LLMs and foundation models in production • MLflow or a comparable tool for experiment tracking and model registry/versioning • MLflow • Production model-serving on AWS that was yours — capacity planning, autoscaling, and diagnosing memory and timeout failures at scale • Production model-serving on AWS that was yours • CI/CD, production workflow orchestration, and IaC • A pragmatic bias. Value delivered incrementally over the perfect rebuild • A pragmatic bias. • Bonus: real-time or low-latency serving at scale. Startup experience. You collect, or you have opinions about the collectibles market. • Bonus: • How We'll Interview You: • We'll be specific so you can prepare. Before any of it: download the app, buy, bid, and sell. Explore our industry. Every round assumes you've used the product, and we expect your point of view to sharpen as you go. • 1. Recruiter screen — 25 minutes. Come ready to talk about the metric you own today, why Alt specifically, and how you're actually using AI. We'll answer your questions and align on comp. • 1. Recruiter screen — 25 minutes. • 2. Hiring manager with Dae, Head of Data — 45 minutes. Be ready to go deep on a model you took to production and kept there: the systems design, what you owned, where it broke, and what you'd do differently. • 2. Hiring manager with Dae, Head of Data — 45 minutes. • 3. System design— 45 minutes. Design a model-serving path under real constraints. We'll push back on at least one of your choices on purpose — how you take that matters as much as the design. • 3. System design— 45 minutes. • 4. Team interview- 45 minutes. How you work with the people who depend on your models, including our Expert Pricers. • 4. Team interview- 45 minutes. • 5. Dae — 30 minutes, then Leore, our founder and CEO — 30 minutes. Everyone who joins Alt meets Leore. Come with a point of view on where you'd take our pricing intelligence. • 5. Dae — 30 minutes • Leore, our founder and CEO — 30 minutes. • Compensation: $230,000 - $250,000 per year, plus equity for all full-time employees.