AI Support Engineer - San Francisco

About Our TeamAt OpenAI, our User Operations team is at the forefront of guiding customers in their journey with AI, ensuring an outstanding product experience. We are pioneering the first-ever post-AGI support team dedicated to resolving intricate challenges, delivering technical insights, and empowering customers to derive maximum value from our solutions. Collaborating closely with Sales, Technical Success, Product, Engineering, and other teams, we strive to provide unparalleled service to a diverse clientele ranging from innovative startups to established global corporations.About the RoleWe are seeking dedicated, experienced, and passionate professionals to join our post-AGI support team and tackle some of the most complex challenges faced by our customers. In this position, you will engage directly with clients through support tickets and Slack communications, troubleshooting intricate problems and addressing unique technical issues while setting a benchmark for team excellence. You will collaborate with cross-functional teams to spearhead initiatives that minimize bugs, enhance features, and develop systems that elevate the customer experience. Your contributions will be key in achieving industry-leading response times and service quality, while also fortifying our internal customer feedback operations in an increasingly complex environment. You will play a vital role in scaling our support organization by refining operational processes and utilizing our technology to shape the future of support in the evolving AI landscape. If you excel in fast-paced environments that prioritize impact, teamwork, and innovative problem-solving, you could be the ideal addition to our team!We operate under a hybrid work model, requiring three days in the office each week, and we provide relocation assistance for new hires.

Join a pioneering team of former Google engineers who have developed ground-breaking defensive technologies, such as Safe Browsing and reCAPTCHA. We are on a mission to confront an urgent challenge: combating the rising tide of adversarial AI attacks that threaten organizations globally.Operating in stealth mode, we are targeting a lucrative $5B+ market that is primed for innovation. Conventional detection methodologies are proving inadequate against the speed and sophistication of AI-driven assaults. Current adversaries are leveraging AI to engineer tailored, high-evasion attacks, leaving traditional systems vulnerable.Your Role:You will design a network of AI agents that are rapid, cost-effective, and precise, collaborating to identify and neutralize emerging threats. Your work will dive deep into real-time threat data, continuously evolving your agents in a fast-paced environment. These agents will function under an orchestration layer that fosters quick adaptation and learning.The Excitement of the ChallengeRapidly Evolving Models: The landscape changes daily; solutions that worked yesterday may be outdated today.Intelligent Adversaries: We are engaged in a real-time arms race against cunning, AI-enhanced attackers crafting sophisticated payloads.No Existing Playbook: We are forging new detection paradigms as swiftly as threats evolve. This high-stakes work places you in the heart of the action from day one.If you thrive on solving challenging problems with rapid feedback, this is your opportunity.Why We Are Positioned to SucceedExpansive Market: The market is vast at $5B and expanding quickly, while established players struggle to adapt.Proven Track Record: Our team has previously developed the foundational technology for Safe Browsing (serving over 5B users) and reCAPTCHA (protecting more than 5M websites) during our time at Google.Experienced Team: This is our third endeavor in creating a category-defining security enterprise, and we know how to scale our technology and our organization effectively.Deeply Integrated AI and Security: We embed AI from the outset rather than layering it on top.Top Talent: We hire only the highest achievers; many on our team were in the top 1% of engineers at Google. If you excelled in your previous role, you will fit right in.Agility: We prioritize speed and efficiency in everything we do.

About Retell AIRetell AI is pioneering the future of customer service by leveraging first principles to transform the call center experience through advanced voice AI technology.In just 18 months since our inception, our innovative AI voice agents have been utilized by thousands of companies to efficiently manage sales, support, and logistics calls, significantly reducing the need for large teams of human agents. With the backing of esteemed investors such as Y Combinator and Alt Capital, we have achieved an impressive $36 million ARR, growing from $5 million at the beginning of 2025 with a dedicated team of 20 professionals.Our ambitious vision for 2026 is to develop a state-of-the-art CX platform powered entirely by AI. We aim to create intelligent AI 'workers' that will function as frontline agents, QA analysts, and managers, capable of autonomously executing, monitoring, and enhancing customer interactions.We are rapidly expanding and seeking passionate innovators eager to solve challenging technical problems, work swiftly, and make a tangible impact at one of the fastest-growing voice AI startups. Join us in shaping the future.Recognized as a top 50 AI app in a16z's list: https://tinyurl.com/5853dt2xRanked #4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025Listed among the top-ranking startups at: https://leanaileaderboard.com/About the RoleAs the Support Engineering Lead at Retell, you will be responsible for overseeing the technical support operations of our sophisticated voice AI platform. This hands-on leadership position involves directly troubleshooting complex customer challenges, developing AI agents and automations, and leading an expanding team of support engineers.You will work at the intersection of engineering, customer relations, and product development, ensuring unparalleled reliability, swift issue resolution, and scalable support systems as Retell continues its growth trajectory.This position is perfect for individuals who thrive on resolving intricate technical issues under pressure, engaging with clients directly, and constructing systems and teams from the ground up.

About the TeamThe User Operations team at OpenAI is dedicated to guiding our clients through the adoption of AI technologies, ensuring an unparalleled product experience. As we embark on building the first-ever post-AGI support team, our focus is on resolving intricate issues, delivering technical insights, and empowering customers to maximize their use of our products. We collaborate extensively with Sales, Technical Success, Product, Engineering, and other teams to provide a seamless experience for our diverse clientele, which ranges from emerging startups to well-established global organizations.About the RoleWe are on the lookout for committed and experienced individuals who are passionate about addressing the complex challenges our customers face as we build our post-AGI support team. In this role, you will engage directly with clients through support tickets and Slack communications, tackling sophisticated issues and resolving undefined technical challenges while setting a positive standard for the team. Close collaboration with cross-functional teams will be essential to drive initiatives aimed at reducing bugs, enhancing features, and developing systems that elevate our clients' experiences. Your contributions will be pivotal in achieving industry-leading response times and service levels while reinforcing our internal customer feedback operations in an increasingly complex landscape. You will play a key role in scaling our support organization by refining operational processes and utilizing our own technology to establish the next iteration of the support team in this new AI landscape. Your efforts will be instrumental in the success of some of the most innovative, disruptive, and scalable AI solutions being developed at OpenAI.If you excel in an environment that prioritizes impact, teamwork, and rapid problem-solving, you could be the ideal addition to our team.We embrace a hybrid work model, requiring three days in the office each week, and we offer relocation assistance to new hires.Note: To comply with a U.S. government contract, applicants for this position must be U.S. citizens, U.S. nationals, or U.S. persons (i.e., U.S. lawful permanent residents, refugees, and asylees).

Join Our Innovative Team at Simple AIAt Simple AI, we are transforming enterprise communications through cutting-edge voice AI agents. Our highly realistic agents empower leading companies such as DoorDash, xAI, and Omaha Steaks to efficiently manage a variety of phone operations, including customer support, order processing, and lead qualification.As we experience exponential growth and a surge in customer demand, we are seeking a few founding software engineers to help us navigate this exciting journey and develop systems for the future. Our passionate team operates from our vibrant San Francisco office five days a week, driven by a shared vision of leveraging AI to make a significant impact in the world.We are proud to be backed by esteemed investors and operators, including Y Combinator, Massive Tech Ventures, and industry leaders such as Michael Seibel (Twitch), Jared Friedman (Scribd), and more.

About the RoleJoin our innovative team at saris-ai, a pioneering applied AI startup based in San Francisco and Montreal. We are on a mission to redefine the banking industry by addressing a $100 billion annual challenge that is rapidly evolving. Our cutting-edge multi-turn AI agentic systems are at the forefront of this transformation.Our objective is to develop automated solutions that require sophisticated long-context reasoning, seamless tool integration across legacy systems, and stringent compliance mechanisms, particularly in scenarios where conventional answers are elusive.With successful real-world deployments and a rapidly expanding client base, we are seeking passionate and technically adept builders eager to make a significant impact from the start.We are in search of an AI Sales Engineer who will play a pivotal role in enhancing productivity and efficiency within financial institutions through innovative AI solutions. In this role, you will lead discovery calls with various departments to identify workflow challenges and design impactful AI-driven solutions. You will serve as the technical authority during sales cycles, assisting clients in recognizing problems, framing solutions, and articulating ROI.This position combines elements of customer engagement and workflow analysis.Your Key Responsibilities Include:Conduct discovery and technical scoping calls with potential clients to uncover operational inefficiencies in financial institutions.Develop workflow maps and reports to identify bottlenecks and pinpoint opportunities for agentic AI automation.Collaborate with the Sales team to co-manage the pre-sales process from initial discovery to proposal delivery.Engage with executive stakeholders, presenting clear and compelling insights on how Agentic AI can deliver measurable ROI and transform operations at scale.Work closely with cross-functional teams including sales, customer success, and product to ensure customer satisfaction and success.

fractional-ai is hiring a Software Engineer to join the team onsite in San Francisco. This role centers on building and improving technology that advances artificial intelligence. Role overview As a Software Engineer, you will work closely with others to develop and support projects that drive the company’s AI initiatives forward. The work involves collaborating with colleagues and contributing technical solutions in a team setting. What you will do Develop software for AI-driven projects Collaborate with team members in the San Francisco office Contribute ideas and technical expertise to ongoing initiatives Requirements Interest in technology and artificial intelligence Ability to work onsite in San Francisco Strong motivation to learn and contribute to team projects

Join Saris AI as an AI Systems Engineer, where you will play a pivotal role in designing and implementing innovative solutions that leverage artificial intelligence technologies. You will collaborate closely with cross-functional teams to develop AI systems that enhance our products and services, driving impactful results for our clients.

Role OverviewLocation: San Francisco, CA Work Model: In-officeAbout Effective AIAt Effective AI, we are pioneering the future of work, focusing on sophisticated AI solutions for complex knowledge tasks rather than simple, repetitive functions. Our goal is to develop advanced AI Teammates that excel in intricate workflows and collaborate seamlessly with human professionals. Our initial challenge is to revolutionize the trillion-dollar U.S. Property & Casualty insurance sector, an area rich in data and complexity, ideal for our innovative approach.We have successfully secured $10 million in seed funding from prominent investors including Lightspeed Ventures and Valor Equity Partners.Our passionate team operates out of San Francisco, where we value in-person collaboration to address these pressing challenges.Your ResponsibilitiesAs a Founding Software Engineer, you will be an integral member of our founding team, significantly influencing the design and development of our core product from inception. You will confront critical challenges in agentic AI, crafting Teammates capable of managing essential insurance functions such as underwriting and claims processing.Specifically, you will:Facilitate long-term task completion by creating the foundational architecture for AI agents to plan and execute multi-step processes reliably over prolonged interactions.Develop advanced reasoning functionalities, enabling agents to make informed decisions based on ambiguous or incomplete information, akin to human experts.Create intelligent, tool-utilizing agents capable of selecting and employing a variety of external tools—APIs, databases, web searches, and Excel-based pricing algorithms—to gather information and take decisive actions.Design adaptive and learning systems, equipping our AI Teammates to learn from feedback and adjust to evolving conditions such as regulatory changes or market dynamics.Your ProfileWe seek an innovative and driven builder excited to tackle substantial challenges.You possess a solid foundation in computer science and remarkable problem-solving capabilities, evidenced by impactful projects or previous experience.Your genuine enthusiasm for AI fuels your passion for tackling complex issues.

Join the Reducto Team as a Support EngineerAt Reducto, we empower AI teams to seamlessly integrate real-world enterprise data with unparalleled accuracy. Our innovative technology unlocks vast amounts of unstructured data, from financial documents to health records, enabling vision models to interpret these resources just like a human would. This capability allows businesses to develop products, train models, and automate processes efficiently.We are experiencing exponential growth, having increased our revenue by 7x year-over-year, and proudly collaborate with a diverse range of clients, from leading AI organizations like Harvey and Vanta to major enterprises including FAANG companies and top trading firms.Backed by over $100 million from prestigious investors such as A16z, Benchmark, and First Round Capital, we are expanding our team and looking for a dedicated Support Engineer.

Saris AI develops advanced AI automation for the banking sector, with teams in San Francisco, Montreal, and Toronto. The company addresses large-scale automation challenges, focusing on long-context reasoning, integrating with legacy systems, and meeting strict compliance needs. Saris AI’s AI agents are already active in production, supporting real customer workflows as the business expands. Role overview The San Francisco engineering team is seeking an Engineering Manager. This leader will guide engineers through shifting priorities and frequent ambiguity. The position involves building and leading teams, managing projects from concept to launch, and ensuring the delivery of reliable software that powers AI-driven products. What you will do Build and lead engineering teams focused on automation and AI Oversee software projects from initial idea through production launch Adapt to changing requirements and priorities as the company grows Address the technical challenges unique to deploying software in AI systems Requirements Proven experience building and leading engineering teams History of delivering software projects from start to finish Comfort working in environments where priorities and requirements shift quickly Understanding of the complexities involved in AI-driven software deployment Location This role is based in San Francisco.

About the RoleWe are on the lookout for a skilled Forward Deployed AI Engineer to join our dynamic team at Stack AI. This position is crucial for implementing enterprise-level AI solutions with an emphasis on Retrieval-Augmented Generation (RAG) pipelines and large language model (LLM) workflows. Your contributions will significantly enhance our offerings to Fortune 500 companies and enterprises across diverse sectors.Role Overview:In this role, you will seamlessly integrate large language models into enterprise systems, collaborating with strategic accounts to tailor solutions that meet their technical needs. Utilizing the Stack AI platform, you’ll engage with clients to co-create innovative solutions that address their evolving challenges.Key Responsibilities:Enhance and maintain solutions for strategic accounts using the Stack AI platform.Analyze and document requirements and relationships within target enterprise offices.Identify opportunities and provide insights to shape our go-to-market strategy.Directly contribute to the Stack AI codebase, transforming customer feedback into enhancements for the Python backend and React/Next.js TypeScript frontend.Project future opportunities and secure high-value contracts.Draft proposals, present to stakeholders, and lead engaging product demonstrations.Promote Stack AI at enterprise conferences and events.

About David AIDavid AI is pioneering the audio data research landscape, applying a rigorous R&D approach to dataset development akin to the methodologies used in AI labs for model creation. Our goal is to integrate AI seamlessly into real-world applications, with audio serving as the perfect entry point due to its inherent versatility and human connection. As the audio AI field progresses, the demand for high-quality training data becomes critical, and that's where David AI excels.Founded in 2024 by a team of experienced engineers and operators from Scale AI, David AI has quickly gained traction, serving prominent clients among FAANG companies and AI research labs. Recently, we secured a $50M Series B funding round from esteemed investors including Meritech, NVIDIA, Jack Altman (Alt Capital), Amplify Partners, and First Round Capital.Our team embodies intelligence, humility, ambition, and a close-knit ethos. We are on the lookout for exceptional talent in research, engineering, product, and operations to join us in advancing the frontiers of audio AI.About Our Engineering TeamAt David AI, our engineering team is responsible for constructing the pipelines, platforms, and models that convert raw audio into valuable data for top AI labs and enterprises. We pride ourselves on our collaborative environment, comprising product engineers, infrastructure specialists, and machine learning experts dedicated to leading the charge in audio data research.We operate at a fast pace, taking ownership of our projects from conception through to production. Our team develops real-time processing pipelines capable of managing terabytes of audio data daily while deploying innovative generative audio models.About This RoleAs a Product Engineer at David AI, you will design and implement state-of-the-art tools that enable our users to leverage audio data effectively for training their AI models. You will collaborate closely with researchers to continuously refine our data collection methodologies.Your ResponsibilitiesDeliver full-stack features that will be utilized by thousands of users on a daily basis.Develop scalable systems that create essential data processing pipelines, extracting actionable insights from terabytes of audio data each day.Construct, deploy, and assess LLM and DSP-based solutions to enhance our clients' comprehension of intricate features within our datasets.Rapidly iterate on research hypotheses by collaborating with researchers and the operations team to deploy enhancements efficiently.

About Simple AIAt Simple AI, we are pioneering cutting-edge voice AI solutions tailored for enterprises. Our lifelike voice agents empower renowned companies such as DoorDash, xAI, and Omaha Steaks in managing diverse phone operations ranging from customer support to order intake and lead qualification. As we experience rapid revenue growth, we seek a couple of founding software engineers to help us meet current customer demands while developing innovative systems for the future. Our team is passionate about harnessing AI to transform the world, and we operate from our San Francisco office five days a week.Simple AI is proudly supported by top-tier investors and industry leaders, including Y Combinator, Massive Tech Ventures, and prominent figures like Michael Seibel (co-founder of Twitch), Jared Friedman (Scribd), Alexandr Wang (Scale AI), Matt Van Horn (June Oven and Lyft), Suhail Doshi (Mixpanel), JJ Fliegelman (WayUp), and Scott Wu (Cognition).Meet the FoundersThe founders, Catheryn Li and Zach Kamran, previously led software teams at Y Combinator, where they launched numerous products for YC founders, including the co-founder matching site. Cat brings experience from Instagram and Facebook and holds degrees in mathematics and computer science from MIT. Zach studied computer science and statistics at the University of Chicago and led software initiatives at PEAK6.What We ProvideCompetitive salary with significant equity opportunitiesEmployee-friendly equity termsOffice located in San FranciscoComprehensive health, dental, and vision insuranceComplimentary lunch and dinner at the officeFree Uber rides home after 8:30 PMRegular team events and offsite activitiesYour Qualifications4+ years of relevant software engineering experience.Exceptional problem-solving skills and a passion for tackling technical challenges.A customer-centric mindset coupled with strong communication skills and a keen interest in product design and prioritization.Self-motivated with the ability to work independently.A genuine enthusiasm for continual learning and keeping abreast of the latest advancements in AI.

David AI builds high-quality audio datasets for AI technologies, working with clients that include major FAANG companies and leading AI labs. Founded in 2024 by former Scale AI engineers and operators, the company recently secured $50 million in Series B funding led by Meritech and NVIDIA. The team values sharp thinking, humility, and ambition, and is expanding across several functions. The Executive Assistant will join the Office of the CEO in San Francisco, working closely with CEO Tomer and supporting the company’s ongoing growth. This position involves direct collaboration with customers, internal teams, and investors, offering a front-row seat to high-level business decisions and daily operations. What you will do Organize and execute team events, offsites, and in-office gatherings. Manage communications for the CEO, determining when to escalate issues or address them independently. Support ad hoc projects spanning recruiting, legal, finance, and business operations. Oversee complex calendar management, prioritization, and scheduling for both internal and external stakeholders. Plan and coordinate travel logistics for team members and prospective candidates. Manage daily office operations, including vendor relationships and supply management. Role overview This role focuses on keeping office operations running smoothly while supporting the CEO and internal teams. Expect involvement in cross-functional projects and a variety of tasks that help maintain organized, efficient processes as David AI scales.

About Our TeamThe Technical Support team plays a pivotal role in empowering developers and enterprises to create mission-critical solutions utilizing OpenAI models. Our mission is to offer technical guidance, resolve intricate issues, and assist our customers in maximizing the value and adoption of our powerful models. We collaborate closely with Technical Success, Product, Engineering, and other departments to ensure our customers receive an unparalleled experience at scale. Adopting an automation-first approach, we leverage cutting-edge AI technologies to enhance our support operations. Join the Senior Support Engineering (SSE) team at OpenAI and contribute to revolutionizing Technical Support in the AI era.About the PositionWe are in search of a Senior Support Engineer to work alongside our strategic enterprise accounts and product teams, tackling some of the most challenging problems our customers face. As a key member of the elite technical troubleshooting team at OpenAI, you will be the go-to expert for both our customers and Engineering teams when addressing complex technical issues in our environment.In this role, you will design and manage operational processes to monitor our top strategic customers and lead a 24/7 response team. Collaborating closely with our Infrastructure and Engineering teams, you will ensure that our customers enjoy the best possible experience at scale. Engaging directly with our most strategic customers, you will be instrumental in the success of the most innovative, disruptive, and large-scale AI solutions developed using the OpenAI API platform.This position is characterized by low volume but high complexity.This role is based in San Francisco, CA, with a hybrid work model requiring three days in the office each week. We also offer relocation assistance to new employees.Key ResponsibilitiesServe as one of the leading technical and troubleshooting experts for our API platform at OpenAI, acting as the final line of defense before escalation to the core Engineering team.Proactively seek and implement strategies to enhance support operations through automation and advancements in AI technologies, playing a role in shaping the future of technical support in an AI-driven landscape.Set up and utilize advanced monitoring and alerting workflows to detect customer-impacting issues in real time.Collaborate with engineering teams to contribute to reliability reviews and preparation for new features, launches, or strategic customer requirements.

Join Our Team as a Machine Learning EngineerSaris-AI is a pioneering applied AI startup, based in San Francisco and Montreal, focused on revolutionizing the banking sector. Our mission is to address a colossal $100 billion/year challenge that is rapidly expanding, innovating the limits of what can be achieved with advanced multi-turn AI systems.We aim to automate complex workflows that necessitate long-context reasoning, orchestration of tools across legacy systems, and rigorous compliance processes—solving problems that currently lack definitive solutions.Our team has successfully deployed AI agents that manage real customer workflows effectively in production. As we expand our customer base and accelerate our growth, we are in search of highly skilled technical builders who aspire to make a significant impact in the early stages of our journey.As a foundational Machine Learning Engineer, you will own our entire ML stack and bring custom agents to life.

Responsibilities:Develop Our Product. Take ownership of software features that enhance our AI platform, empowering private market investors to analyze deals swiftly and accurately. This role requires you to actively engage in coding and delivering essential platform components from the ground up.Ensure Quality and Excellence. Establish and maintain coding standards, architectural guidelines, and review procedures; mentor fellow engineers. Co-cultivate a culture centered on practical, reliable, and test-driven development that swiftly meets business requirements.Scale for Growth. Assist in monitoring and scaling the architecture of our platform and its infrastructure.Collaborate Across Functions. Engage closely with product, security, and go-to-market teams to translate our strategic roadmap into actionable features and deliverables.

About Vooma Vooma is building automation-focused enterprise software, moving beyond traditional systems of record. The team develops LLM-powered agents and orchestrators that handle complex business tasks alongside people, aiming to boost autonomy and efficiency in daily operations. The company’s current mission centers on creating an AI orchestration platform tailored for the US trucking industry, which moves over $800 billion in goods each year. Although trucking is essential to the economy, much of logistics still relies on manual work, making it a strong fit for AI-driven solutions. Vooma’s products help shippers, freight brokers, and trucking companies win more business and manage freight operations more smoothly. AI agents automate critical workflows across voice, email, and SMS, supporting the full load lifecycle. Vooma is backed by Index Ventures, Craft Ventures, Y-Combinator, and leaders from the logistics sector. Role Overview: AI Engineer The founding team is looking for an AI Engineer to help train and refine advanced models for real-world use. This role focuses on applied AI, where new capabilities are transformed into reliable, high-performing systems that make a measurable difference. Success in this position comes from a strong grasp of model behavior and a talent for building systems that improve through structured data feedback loops. The right person enjoys rapid deployment, learning from real-world usage, and iterating toward highly effective solutions. Location This role is based in Vooma’s San Francisco office.

About Fable SecurityIn today's landscape, AI-driven threats and human errors pose the greatest risks to enterprise security.Cybercriminals primarily target individuals rather than systems, with human errors accounting for 70% of security breaches. At Fable, we are committed to transforming individuals from potential targets into a robust layer of defense.Fable is the pioneering human risk platform that actively influences employee behavior. Our user-friendly, enterprise-grade platform consolidates diverse employee data, identifies risky actions, and delivers tailored interventions in real time, directly within their work environment.Supported by notable investors such as Redpoint Ventures and Greylock Partners, and founded by former team members of Abnormal Security, Fable is addressing one of cybersecurity's most pressing challenges in a multi-billion-dollar market. Our dynamic team comprises alumni from prestigious organizations like Meta, Twitter, Flexport, and esteemed universities including Waterloo, Columbia, Berkeley, Purdue, CMU, Stanford, UCLA, and USC. Join us at this pivotal moment in our growth journey to help shape the future of security.