Founding Machine Learning Engineer [33007] (San Francisco Bay Area)

Stealth Startup
San Francisco, US
On-siteVisa Sponsorship

Job Description

We're hiring our Founding Machine Learning Engineer (MLE) with expertise in Agent Development and Time-Series Modeling. You'll play a foundational role in building production-grade systems that combine the power of LLM-powered agents with time-series foundation models.

The Role

This is not a narrow research role — you'll design, train, deploy, and monitor ML systems end-to-end, moving from prototype to production with speed and autonomy. You'll also be a core contributor to defining how agents interact with multimodal numerical data, a problem space where the playbook does not yet exist.

Job Description:

  • Design, train, and deploy production ML systems (LLM-powered agents + time-series models)
  • Build and scale LLM-powered agents with advanced capabilities: multi-step reasoning, tool integration, autonomous workflows, memory/context management, and adaptive strategies
  • Develop and refine evaluation frameworks for agents, ensuring reliability, safety, and measurable performance
  • Apply and extend time-series modeling techniques (forecasting, anomaly detection, multimodal fusion) in real-world customer scenarios
  • Operate end-to-end: from data ingestion and preprocessing to deployment, monitoring, and continuous improvement
  • Stay ahead of the curve on the latest innovations in AI agents, orchestration frameworks, and infrastructure (MCP, A2A, etc.)
  • Partner directly with researchers, engineers, and lighthouse customers to validate solutions and drive rapid iteration

What we're looking for:

  • Proven industry experience (4-10 years) as an ML Engineer, Research Engineer, or Applied Scientist, with a track record of shipping production ML systems
  • Hands-on expertise in LLM-powered agents: multi-step reasoning, tool use, context windows, autonomous workflows, agent memory
  • Deep understanding of agent evaluation techniques (reliability, safety, success metrics)
  • Up-to-date with modern agent infrastructure and frameworks (MCP, A2A, etc.)
  • Fluency with ML engineering best practices: reproducibility, monitoring, scaling, CI/CD, observability
  • Comfort operating in a fast-paced startup: shipping quickly, making tradeoffs, and thriving in ambiguity

Nice to have:

  • Experience training custom neural networks beyond pre-trained LLMs (e.g., transformers for time-series or multimodal data)
  • A background in time-series modeling (forecasting, anomaly detection, classical + deep learning approaches)
  • Published research or open-source contributions in ML/AI

Location & Sponsorship

  • Location: San Francisco Bay Area, CA (in-person)
  • Visa Sponsorship: H1-B, O1

Skills & Requirements

Technical Skills

Agent developmentTime-series modelingLlm-powered agentsMulti-step reasoningTool integrationAutonomous workflowsMemory/context managementAdaptive strategiesTime-series foundation modelsForecastingAnomaly detectionMultimodal fusionMl engineering best practicesReproducibilityMonitoringScalingCi/cdObservabilityMcpA2aLeadershipCommunicationProblem-solvingTeamworkAiMachine learningEngineering

Employment Type

FULL TIME

Level

senior

Posted

4/14/2026

Apply Now

You will be redirected to Stealth Startup's application portal.