Top Tech Jobs & Startup Jobs in San Francisco Bay Area, CA

Develop and train reinforcement-learning control models in realistic simulators, refine training environments and reward logic, analyze and improve model performance, close the sim-to-real gap with plant data, write well-tested production code, and collaborate with process and chemistry experts to deploy autonomous controllers optimizing recovery, reagent use, energy, and uptime.

Design and own end-to-end data domains and pipelines for plant sensors, lab results, and historians. Build schemas, ensure data quality, observability, and lineage, and supply model-ready time-series and analytical datasets to ML and operations teams. Mentor junior engineers and define data contracts.

Support pilot-scale process development for bioleaching and other metallurgical equipment: operate and troubleshoot pilot systems, run experiments, maintain PFDs/P&IDs and procedures, analyze data for process improvements, collaborate with software/ML teams on monitoring, and uphold EHS and risk-management practices.

Serve as a strategic HR business partner and hands-on generalist supporting the full employee lifecycle. Advise leaders on compensation, performance, organizational design, and workforce planning. Manage HR operations (onboarding/offboarding, HRIS, policy, compliance), coach on employee relations and investigations, drive engagement programs, analyze workforce data, and help scale people programs to support growth and a high-performing culture.

Lead mechanical engineering for mineral processing and metallurgical refining projects: design, specify, and validate static equipment and solids-handling systems; perform FEA and CFD analyses; develop plant layouts and 3D models; manage vendors through procurement, fabrication, and commissioning; and provide on-site construction and start-up support while collaborating with multidisciplinary teams.

Own end-to-end pre-operational procurement for new projects and sites: define specs with engineering, run RFQs, qualify vendors, negotiate contracts, execute purchases, manage first deliveries, consolidate sourcing for volume savings, and transition vendor relationships to on-site procurement.

Design, prototype, and validate electromechanical and robotic hardware for autonomous mining vehicles, including drive-by-wire actuation, motion and powertrain systems, manipulators, and end-effectors. Produce CAD, BOMs, select components, lead bench and field testing, and collaborate with controls and autonomy teams to integrate hardware, sensing, and compute for fully autonomous operation.

Lead end-to-end execution of Mariana's capital project programs from development through construction, owning schedules, budgets, risk management, and cross-functional coordination. Manage and grow a team of Technical Program Managers, drive deployment of capital-project software tools, standardize project development and execution, and partner with finance and business development on capital allocation and project economics.

Design, implement, and validate autonomy software for mining vehicles including perception, localization, mapping, motion planning, and control. Integrate and calibrate LiDAR, camera, radar, IMU/GNSS sensors; build embedded real-time software; develop simulation and data pipelines; and lead bench, rig, and field validation while collaborating with hardware and controls teams.

The Hydrometallurgical Process Engineer will lead the development of hydrometallurgical refining processes and manage equipment scopes from concept to execution, optimizing mineral extraction and collaborating with various teams for integration with software and automation.