AI Engineer
Mountain View, CA · On-site
Design and implement REST/GraphQL APIs with proper auth (OAuth2/JWT), input validation, and rate ... AI-native building ability: you know how to use AI tools (Claude Code, Cursor, Copilot, etc.) to ...
Mountain View, CA · On-site
Design and implement REST/GraphQL APIs with proper auth (OAuth2/JWT), input validation, and rate ... AI-native building ability: you know how to use AI tools (Claude Code, Cursor, Copilot, etc.) to ...
Mountain View, CA · On-site
Design and implement REST/GraphQL APIs with proper auth (OAuth2/JWT), input validation, and rate ... AI-native building ability: you know how to use AI tools (Claude Code, Cursor, Copilot, etc.) to ...
San Francisco, CA · On-site
$140 - $190/hr
Nexxa is building the best AI systems for heavy industries -- enabling machines, systems and ... Define and track quality metrics beyond simple accuracy -- groundedness, hallucination rate, task ...
San Francisco, CA · On-site
$140 - $190/hr
Nexxa is building the best AI systems for heavy industries -- enabling machines, systems and ... Define and track quality metrics beyond simple accuracy -- groundedness, hallucination rate, task ...
Nexxa is building the best AI systems for heavy industries - enabling machines, systems and ... Define and track quality metrics beyond simple accuracy - groundedness, hallucination rate, task ...
Nexxa is building the best AI systems for heavy industries - enabling machines, systems and ... Define and track quality metrics beyond simple accuracy - groundedness, hallucination rate, task ...
Sunnyvale, CA · On-site
$150 - $190/hr
Nexxa is building the best AI systems for heavy industries -- enabling machines, systems and ... Define and track quality metrics beyond simple accuracy -- groundedness, hallucination rate, task ...
Sunnyvale, CA · On-site
$150 - $190/hr
Nexxa is building the best AI systems for heavy industries -- enabling machines, systems and ... Define and track quality metrics beyond simple accuracy -- groundedness, hallucination rate, task ...
Sunnyvale, CA · On-site
$120 - $190/hr
Integrate AI models developed by AI engineers into product backends while continuously improving scalability, monitoring, and resilience based on latency, error rates, and operational costs. * Domain ...
Sunnyvale, CA · On-site
$120 - $190/hr
Integrate AI models developed by AI engineers into product backends while continuously improving scalability, monitoring, and resilience based on latency, error rates, and operational costs. * Domain ...
San Francisco, CA · On-site
$250K - $350K/yr
Own output quality across Highlight chat, actions, and workflows; drive toward industry leading acceptance rates. * Build and lead a world-class ML Engineering team; Establish AI/ML best practices ...
San Francisco, CA · On-site
$250K - $350K/yr
Own output quality across Highlight chat, actions, and workflows; drive toward industry leading acceptance rates. * Build and lead a world-class ML Engineering team; Establish AI/ML best practices ...
Redwood City, CA · On-site
$160K - $219K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
Redwood City, CA · On-site
$160K - $219K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
Redwood City, CA · On-site
$160 - $219/hr
AI), is the Enterprise AI application software company. C3 AI delivers a family of fully integrated ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
Redwood City, CA · On-site
$160 - $219/hr
AI), is the Enterprise AI application software company. C3 AI delivers a family of fully integrated ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
San Francisco, CA · On-site
$180 - $240/hr
As people increasingly use AI for emotional support, health information, and guidance during ... Design studies to validate evaluation methods, including clinician review, inter-rater reliability ...
San Francisco, CA · On-site
$180 - $240/hr
As people increasingly use AI for emotional support, health information, and guidance during ... Design studies to validate evaluation methods, including clinician review, inter-rater reliability ...
Define and track key product metrics: deployment success rates, time-to-value, system reliability ... Strong understanding of how AI compute workloads are provisioned, deployed, and operated ...
Quick apply
Define and track key product metrics: deployment success rates, time-to-value, system reliability ... Strong understanding of how AI compute workloads are provisioned, deployed, and operated ...
$150K - $197K/yr
C3 AI is building the platform that makes autonomous intelligence reliable in the real world. We ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
$150K - $197K/yr
C3 AI is building the platform that makes autonomous intelligence reliable in the real world. We ... rates in production. * Drive agent performance: optimize latency, throughput, scalability, and ...
Redwood City, CA · On-site
$140 - $220/hr
C3 AI C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to lead C3 AI ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
Redwood City, CA · On-site
$140 - $220/hr
C3 AI C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to lead C3 AI ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
Redwood City, CA · On-site
$140K - $220K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
Redwood City, CA · On-site
$140K - $220K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
Redwood City, CA · On-site
$140K - $220K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... Establish and manage partnership KPIs, including sourced pipeline, win rate, influenced revenue ...
Redwood City, CA · On-site
$140K - $220K/yr
C3 AI (NYSE: AI), is the Enterprise AI application software company. C3 AI delivers a family of ... Establish and manage partnership KPIs, including sourced pipeline, win rate, influenced revenue ...
Lead flagship AI/ML projects that drive measurable value across fixed income trading, credit, rates, and investment banking workflows, from pricing and execution to risk and origination. * Direct the ...
Lead flagship AI/ML projects that drive measurable value across fixed income trading, credit, rates, and investment banking workflows, from pricing and execution to risk and origination. * Direct the ...
C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to lead C3 AI's relationships with ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to lead C3 AI's relationships with ... Establish and track partnership KPIs, including sourced pipeline, influenced revenue, win rate, and ...
Redwood City, CA · On-site
$120 - $160/hr
Define and track key product metrics: deployment success rates, time‑to‑value, system ... Strong understanding of how AI compute workloads are provisioned, deployed, and operated ...
Redwood City, CA · On-site
$120 - $160/hr
Define and track key product metrics: deployment success rates, time‑to‑value, system ... Strong understanding of how AI compute workloads are provisioned, deployed, and operated ...
C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to own and grow C3 AI ... Establish and manage partnership KPIs, including sourced pipeline, win rate, influenced revenue ...
C3 AI is seeking a Manager / Senior Manager, Strategic Alliances to own and grow C3 AI ... Establish and manage partnership KPIs, including sourced pipeline, win rate, influenced revenue ...
San Francisco, CA · On-site
$225K - $275K/yr
Higgsfield AI is the fastest-scaling generative AI company in history, hitting $500M in annual revenue run rate, 25M+ users worldwide, 6M+ generations per day, and powering 390 of Fortune 500 brands.
San Francisco, CA · On-site
$225K - $275K/yr
Higgsfield AI is the fastest-scaling generative AI company in history, hitting $500M in annual revenue run rate, 25M+ users worldwide, 6M+ generations per day, and powering 390 of Fortune 500 brands.
San Francisco, CA · On-site +1
$134K - $185K/yr
Design rate limiting, isolation, and workload protection controls * Build monitoring and detection for anomalous inference behavior AI Supply Chain and Model Security * Evaluate open source models ...
San Francisco, CA · On-site +1
$134K - $185K/yr
Design rate limiting, isolation, and workload protection controls * Build monitoring and detection for anomalous inference behavior AI Supply Chain and Model Security * Evaluate open source models ...
An AI Rater evaluates and provides feedback on artificial intelligence models, typically improving search engines, chatbots, or recommendation systems. They assess the relevance, accuracy, and quality of AI-generated content based on specific guidelines. This role requires strong analytical skills, attention to detail, and familiarity with the subject matter being reviewed. AI Raters often work remotely and on a flexible schedule.
A typical day for an AI Rater involves reviewing and evaluating various types of content, such as search engine results, social media posts, advertisements, or chatbot responses, to ensure they meet quality and relevancy standards. You may follow detailed guidelines to rate or annotate content, complete assigned tasks in a web-based platform, and provide feedback to help improve AI performance. Most positions are remote and offer flexible schedules, allowing you to plan your workload around personal commitments. Collaboration is generally limited, as most work is performed independently, but periodic communication with team leads for training or updates is common.
To thrive as an AI Rater, you generally need strong attention to detail, analytical thinking, and proficiency in English, often supported by formal education such as a high school diploma or higher. Familiarity with web browsers, online research, and company-specific rating platforms or guidelines is essential. Excellent time management, adaptability, and effective written communication help individuals excel in this position. These skills and qualities ensure accurate and consistent evaluations of AI-generated content, directly impacting the improvement of artificial intelligence systems.
The most popular types of Ai Rater jobs in California are:
For Ai Rater jobs in California, the most frequently searched job titles are:
The top searched job categories for Ai Rater jobs in California are:
Cities in California with the most Ai Rater job openings:

Other
Posted 5 days ago
Participate in end-to-end product and engineering workflows, including building and improving agentic systems and evaluation pipelines.
Design, implement, and ship backend code such as APIs, database schemas, and permission models for production systems.
Operate and maintain deployed services by containerizing, deploying, and setting up monitoring and logging.
At O₂ AI, we are building a Vertical AI Agent for the global semiconductor and electronics supply chain, just as Harvey is transforming the legal industry.
Company Website: https://o2tech.ai/
We build deeply vertical AI Agents capable of handling high-stakes, high-complexity challenges in global manufacturing systems, transforming chaos into efficient, intelligent automated execution.
We are looking for a hands-on Builder to own product engineering end-to-end: from understanding real customer problems, to designing and shipping AI-native systems, to iterating in production.
Why Join Us?
Elite Founding Team
Work alongside founders & early members from Yale, Northwestern, NUS, Columbia, Stanford and MIT, with experience across DeepSeek, NVIDIA, and Microsoft, etc.. We are a team that cares equally about frontier AI and real product execution.
We ship: (1) systems used by real customers, (2) awarded publications at top venues.
Real Customers, Real Impact
At O₂ AI, we provide you with direct opportunities to communicate with customers. You will interface directly with US clients and collaborate with Fortune 500 electronics and semiconductor companies. Our products span three layers:
Your code will touch real users, real operational constraints, and real revenue.
True 0 → 1 Ownership
At O₂ AI, we create opportunities for you to deeply engage in product and engineering. You will participate in the complete process from problem definition and solution design to product launch and continuous iteration, gaining highly hands-on practical experience and witnessing the real-world impact of your work in customer business scenarios.
Co-creating Cutting-edge AI with Frontier Labs
O₂ Lab, our downstream research-driven lab, collaborates deeply with Northwestern MLL Lab and MIT Media Lab. Members of the founding team have been recognized at venues such as NeurIPS LAW (Outstanding Paper) and ICCV SP4V (Best Paper), with 10k+ github stars, Huggingface #2 paper of the day, and invited talks at DeepMind, MIT, etc.
We focus on translating research into production-grade vertical AI systems. You will have opportunities for joint research, publications, and turning research insights into shipped products.
What You'll Work On
Participate in end-to-end product and engineering workflows. You are expected to participate in at least one of the following terms in the product lifecycle:
Build and improve agentic workflows and systems
Ship backend code in a real production system
Operate what you build
Foundation We Hope You Have
Strong coding fundamentals: at minimum, solid in Python. You can read, write, debug, and reason about code under pressure, with strong experiences coding agent workflow, training, or evaluation.
AI-native building ability: you know how to use AI tools (Claude Code, Cursor, Copilot, etc.) to prototype, iterate, and ship quickly. You don't just prompt, but build systems around prompts.
Fast learner: you can pick up new stacks, APIs, codebases, and business domains with minimal hand-holding.
Product and systems sense: you can look at a messy business process and start to see where the data flows, where the agent should act, and where a human should stay in the loop.
Ownership under ambiguity: Ask the right questions, not waiting until everything is ready, make reasonable assumptions, build a prototype, and iterate from there.
Nice to have:
General Computer Science background (CS / EE / Software Engineering / AI, etc.)
Familiar with relevant technical stacks (React + TypeScript ; Python / Node.js)
Strong background in AI / LLM / Agent systems (hackathon awards, course project awards, strong GPA in CS/AI/ML courses, publications, open-source projects, etc)
Familiar with or willing to dive deep into:
Patience and enthusiasm for writing code, debugging systems, and solving real problems
We Welcome High-Potential Builders!
If you don't yet have extensive experience or haven't built a complete production-grade product from 0 to 1, that's totally fine.
At O₂ AI, we are very happy to work with engineers who have solid coding abilities and learn quickly to build products together. This is an environment that allows you to truly participate in real systems and grow rapidly.
As long as you have a solid computer science foundation, good engineering discipline, and a strong desire to build, this will be an exceptionally valuable hands-on opportunity!
Work Location
Remote / Mountain View, California
Resume submission: engineer@o2tech.ai
If you have GitHub / portfolio / links to deployed systems, please feel free to include them!