Skip to content
LiftoffLiftoff

Machine Learning Engineer

Machine Learning Engineer building statistical models, optimization systems, and experiments for mobile ad tech economics on the Revenue Engine team. Requires PhD in CS/ML/Economics and industry experience applying ML or economics at scale.

About the job

Responsibilities

  • Build statistical models and production systems to balance advertiser performance with business goals.
  • Tune optimization parameters, measure internal competition, and model dynamic environments.
  • Design and run experiments to validate theories underpinning the mobile ad tech economy.
  • Develop applications in the areas of advertiser budget retention and growth, optimal margin allocation, and bidding innovations.
  • Collaborate with a team of world-class engineers with diverse backgrounds as well as peers across the broader company (e.g. Operations, GTM).
  • Use strong communication skills (verbal and written) to explain statistical and machine learning concepts to both technical and non-technical audiences.
  • Be part of an “engineering excellence” culture through state-of-the-art tools, risk-driven testing, explainable systems, and design/code review.

Requirements

  • PhD in Computer Science, Machine Learning, Economics, or a related field.
  • Industry experience applying economics or machine learning to large scale problems.
  • Solid engineering and coding skills.
  • Excellent team communication and collaboration skills.
  • Experience with ad tech is a solid plus.

Compensation

  • SF Bay Area, Los Angeles/Orange County, NYC, Seattle: $235,000 - $275,000
  • All other cities and towns in our approved states: $215,000 - $255,000
  • Includes equity and health/vision/dental benefits.

Skills

Machine Learning, Statistics, Economics, Python, Experiment Design, Ad Tech, Optimization, Bidding Systems

Applied Intuition

Applied Intuition

Sunnyvale, CA

Machine Learning Performance Engineer - Offboard Training & Inference
$215k+/yrOn-siteML Engineering

Optimizes distributed machine learning training and high-throughput offline inference across large accelerator clusters. The role focuses on profiling, scaling efficiency, cluster goodput, GPU performance, and cost-effective processing of autonomy data.

Cinder

Cinder

New York, NY

AI/ML Engineer
$220k+/yrHybrid5+ YOEML Engineering

Build and operate production machine-learning systems for content safety, from messy customer data through classification, evaluation, and inference. The role requires 5+ years of ML engineering experience, strong Python and MLOps skills, and sound judgment across classical models and LLMs.

Perplexity

Perplexity

San Francisco, CA

Member of Technical Staff
$220k+/yrOn-siteML Engineering

Build AI agent harnesses, models, and product capabilities that enable agents to perform complex work across digital environments. The role combines applied AI research and software engineering, requiring Python proficiency, strong product judgment, and experience with agent tooling, reinforcement learning, or browser technologies.

Firecrawl

Firecrawl

San Francisco, CA

Machine Learning Engineer
$210k+/yrHybrid3+ YOEML Engineering

Build and operate production machine-learning systems for search ranking, relevance, extraction quality, and LLM-driven features. The role requires production ML ownership, ranking or relevance expertise, large-scale data experience, Python, and rigorous experimentation skills.

Mercor

Mercor

San Francisco, CA

Member of Technical Staff, Enterprise Evals Platform
$220k+/yrOn-siteML Engineering

Builds the platform, verifiers, environments, and grading infrastructure used to evaluate enterprise AI agents at scale. The role combines strong software engineering with expertise in agent runtimes, evaluation design, benchmarks, and production failure analysis.