Senior State Estimation Engineer at Hayden AI | San Francisco

Hayden AI develops computer vision platforms that assist transit agencies and governments in addressing real-world transportation challenges. The company’s mobile perception technology supports bus lane and bus stop enforcement, enhances transit operations, and aims to create safer streets while promoting sustainability. Role overview The Senior State Estimation Engineer position is based at Hayden AI’s San Francisco headquarters. This role centers on designing and deploying advanced real-time pose estimation algorithms. The work involves both research and practical development, targeting complex mapping challenges at scale. Collaboration and responsibilities Collaboration is an essential part of this role. The Senior State Estimation Engineer will work closely with fellow engineers on multi-sensor calibration efforts, participating in both fieldwork and factory-based projects. The position blends technical leadership with hands-on problem solving in a team setting.

About UsAt Hayden AI, we are dedicated to leveraging advanced computer vision technology to revolutionize how transit systems and governmental agencies tackle pressing real-world challenges. Our state-of-the-art mobile perception system not only enhances transportation efficiency but also promotes street safety and sustainable urban development.Job Summary:We are seeking an Engineering Manager for State Estimation to lead a dynamic team in the creation of cutting-edge mapping, localization, and SLAM (Simultaneous Localization and Mapping) solutions aimed at embedded camera systems. This role involves overseeing the research, development, and implementation of large-scale mapping and localization solutions while driving technical strategy and fostering collaboration across device, cloud, and applied AI teams.Responsibilities:Guide, mentor, and manage a talented team of engineers in developing pioneering mapping, localization, and SLAM algorithms.Establish technical direction and prioritize projects in alignment with organizational objectives.Lead impactful, cross-functional projects from inception to deployment, collaborating closely with research, hardware, and product teams.Provide expert advice on algorithm design, system architecture, and implementation while promoting software development best practices and performance optimization.Cultivate a culture of innovation, technical excellence, and teamwork within the department.Create and manage project roadmaps, milestones, and comprehensive technical documentation.Collaborate with senior leadership to shape long-term strategies for localization, state estimation, and multi-sensor calibration.Review and endorse designs, architectures, and implementations, ensuring top-tier technical quality and scalability.Lead recruitment and performance management to build an outstanding engineering team.

Hayden AI creates mobile perception systems that help transit agencies and city governments solve transportation challenges. The team’s technology supports bus lane and stop enforcement, improves street safety, and helps make transit systems more efficient and sustainable. This Senior Firmware Engineer role is based at Hayden AI’s San Francisco headquarters. The position sits within the Device Software team and focuses on the low-level software stack powering the company’s edge AI systems. Work centers on direct interaction with hardware to ensure reliable, high-performance operation in real-world settings. Responsibilities Develop and maintain Linux kernel modules and device drivers for embedded platforms. Integrate hardware and software layers for edge AI devices to ensure stable operation. Work closely with hardware engineers and other software teams to deliver high-performance solutions. Troubleshoot and resolve firmware issues in deployed environments. Requirements Significant experience with Linux kernel and device driver development. Strong background in embedded systems and low-level programming. Comfort working directly with hardware and debugging complex system interactions. Experience with edge AI or similar real-time systems is a plus.

About UsAt Hayden AI, we are dedicated to leveraging the capabilities of computer vision to revolutionize how transit systems and government agencies tackle pressing real-world issues.Our cutting-edge mobile perception system enhances bus lane enforcement, transportation optimization, and much more, empowering our clients to speed up transit, improve street safety, and work towards a sustainable future.About the RoleThe Infrastructure Engineering team plays a vital role in the success of Hayden AI products. We are responsible for the foundational infrastructure that links thousands of deployed devices to our extensive, multi-region cloud services and applications that utilize the data collected from these devices. If you consider yourself a force multiplier, you’ll thrive in our dynamic team!Key Responsibilities:Architect the Service Backbone: Lead the design and continuous improvement of our core services architecture, ensuring a robust, high-availability backbone for all cloud services and engineering teams.Drive Technical Roadmap: Define the long-term technical strategy and architectural vision for our cloud services, aligning with future business expansion and technological advancements.Strategic Decision Making: Lead pivotal architectural decisions, conduct in-depth code reviews, and assess technical trade-offs to maintain a sustainable and scalable service ecosystem.Scale Multi-Region Cloud: Design and oversee globally distributed, multi-region cloud deployments utilizing advanced Infrastructure as Code (IaC) for optimal scalability and performance.Automate Everything: Employ automation and modern orchestration tools to minimize manual tasks, enabling a self-service infrastructure model that allows developers to deploy code swiftly and safely.

Join Our Team at Hayden AIAt Hayden AI, we are dedicated to revolutionizing public transit and government operations through innovative computer vision technologies. Our mission is to tackle real-world challenges faced by transit systems, enabling them to enhance safety, optimize transportation, and contribute to a sustainable future.We develop advanced mobile perception systems designed to improve transit flow and street safety. As a part of our dynamic team, you will work at the forefront of technology, utilizing AWS and GCP cloud services while developing cutting-edge Linux-based edge devices.Role OverviewWe seek an enthusiastic Senior Software Engineer to enhance our data platform, ensuring it is reliable, scalable, and high-performing. In this role, you will design and construct core data infrastructure, optimize data pipelines, uphold data quality standards, and collaborate closely with product and data science teams to deliver transformative data solutions that drive business insights.

About UsAt Hayden AI, we are dedicated to revolutionizing the operational capabilities of transit systems and governmental organizations through cutting-edge computer vision technology.Our innovative mobile perception system not only streamlines bus lane and bus stop enforcement but also enhances transportation optimization, enabling our clients to boost transit efficiency, improve street safety, and work towards a sustainable future.About the Role:As a Senior Program Manager, you will play a pivotal role in fostering positive relationships with our clients. You will oversee various projects, including system implementations, and provide comprehensive program management throughout the project lifecycle. A thorough understanding of our products and services will be essential to assist clients effectively and to recommend optimal solutions tailored to their needs. You will act as the voice of the customer and advocate for enhancements to Hayden AI solutions to the product management, engineering, and operations teams.Responsibilities:Customer Onboarding & ImplementationLead and manage all aspects of client onboarding and implementation processes.Create and maintain a detailed implementation schedule that aligns with client needs and internal timelines.Employ the implementation playbook to effectively guide new customer deployments.Provide training to clients on Hayden AI software, ensuring a smooth transfer of knowledge.Issue Resolution & EscalationsServe as the first point of contact for operational challenges, collaborating closely with business strategy leads, operations teams, and project engineers.Proactively identify and address bottlenecks in customer workflows.Coordinate the resolution of complex issues in conjunction with the Engineering team.Monitor and manage escalations, ensuring prompt resolutions.Monitoring & Performance TrackingTrack essential customer metrics such as uptime, adoption rates, and engagement levels.Guarantee that SLAs and contractual obligations are consistently fulfilled.Provide regular updates on project milestones and performance metrics to stakeholders.

Join Our Mission at Hayden AIAt Hayden AI, we strive to leverage cutting-edge computer vision technology to revolutionize how transit systems and government agencies tackle real-world challenges.Our innovative mobile perception system is designed to enhance transit efficiency, improve street safety, and foster a sustainable future through various applications, including bus lane enforcement and transportation optimization technologies.Your RoleAs a pivotal member of the Hayden Software Engineering team, you will help develop our next-generation Automated Bus Lane Enforcement product. You will be engaged in creating, integrating, and deploying edge-based perception models.This position is centered around C++ software engineering. You will be responsible for delivering high-quality, modern C++ (C++17/20) code that operates on embedded Linux edge devices, primarily utilizing the NVIDIA Embedded Platform.Your work will involve building and optimizing real-time CV/ML pipelines on-device, incorporating CUDA/TensorRT and efficient camera/video input/output.You will collaborate closely with Product Management to translate customer requirements into effective software solutions.Being part of a startup, you will thrive in a fast-paced, dynamic environment with evolving challenges.As we expand, your contributions will help establish a robust foundation through well-designed and thoroughly tested code that can be shared across the organization.

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 UsAt Hayden AI, our goal is to leverage computer vision technology to revolutionize how transit systems and government agencies tackle real-world challenges.Our cutting-edge mobile perception systems facilitate bus lane enforcement, transportation optimization, and more, enabling clients to enhance transit efficiency, improve street safety, and promote sustainable practices.About the Perception TeamThe Perception Team at Hayden AI specializes in developing and refining AI algorithms that drive our mobile enforcement systems, analyzing video and image data to identify traffic violations, parking infractions, and other urban compliance issues. This collaborative team works closely with both cloud and device engineering to create and implement perception pipelines that provide actionable insights for our clients.About the RoleAs a Software Engineering Intern focusing on Perception at Hayden AI, you will be integral to the development of AI systems that support our mobile enforcement platform. You will engage with computer vision and machine learning models to process real-world video and image data for detecting traffic violations and urban compliance events.This position intersects machine learning, data analytics, and real-world deployment. Your responsibilities may include improving model accuracy, refining training datasets, assessing edge cases, optimizing inference performance, and developing tools to enhance perception pipelines across cloud and on-device environments.This is not a role for side projects; you will take ownership of significant technical work that impacts our production systems. Under the mentorship of a senior engineer, you will design experiments, implement enhancements, evaluate performance, and help deliver improvements that influence how our systems interpret and respond to the physical world.This internship is perfect for individuals passionate about applied AI, particularly in computer vision, model evaluation, and deploying machine learning systems in real-world settings.The position is based in San Francisco, with a hybrid work schedule requiring at least three days in the office each week.

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.

Join the Revolution at Retell AIRetell AI is pioneering the future of call centers through innovative voice AI, driven by first principles thinking.In just 18 months since our inception, we have empowered thousands of businesses with our AI voice agents, transforming how sales, support, and logistics calls are managed—previously requiring extensive human teams. Supported by prestigious investors such as Y Combinator and Alt Capital, we've rapidly scaled from $5M ARR to an impressive $36M ARR with a compact yet dynamic team of 20.Our ambition for 2026 is to create a revolutionary customer experience platform, where entire contact centers are powered by AI. Moving beyond basic automation, we aim to develop intelligent AI “workers” that serve as frontline agents, QA analysts, and managers, continuously enhancing customer interactions without the need for constant human oversight.As we expand, we are seeking passionate engineers who are eager to solve challenging technical problems, act swiftly, and make a significant impact in one of the fastest-growing voice AI startups. Let’s shape the future together.

Join Our Innovative Team at Retell AIRetell AI is at the forefront of revolutionizing the call center industry through advanced voice AI technology. In just 18 months since our inception, we have empowered thousands of businesses to optimize their sales, support, and logistics calls, which previously relied on large teams of human agents. Supported by prominent investors including Y Combinator and Alt Capital, we've achieved remarkable growth, scaling from $5 million to $36 million in annual recurring revenue (ARR) while expanding our talented team to 20 members.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. Unlike traditional automation that requires ongoing human oversight, we are building intelligent AI "workers" capable of functioning as frontline agents, quality assurance analysts, and managers, constantly enhancing customer interactions.If you are a passionate innovator eager to solve complex technical challenges and make a tangible impact at one of the fastest-growing voice AI startups, we invite you to join us in shaping the future.Ranked among the top 50 AI applications by a16z: a16z List4th on Brex's Fast-Growing Software Vendors of 2025: Brex BenchmarkFeatured as a leading startup on: Leanaileaderboard

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.

fractional-ai is looking for a Senior or Staff Software Engineer to join the San Francisco office. This position centers on building advanced AI solutions with a team that values both technical depth and collaboration. Role overview This role focuses on designing and developing AI-driven systems. The work involves solving technical challenges and contributing to projects that push the boundaries of what AI can achieve. Collaboration with other engineers and stakeholders is a key part of daily responsibilities. Who will thrive Experienced engineers with a strong background in software development Those who enjoy working on complex technical problems Individuals who value teamwork and open communication Location This position is based in the San Francisco office.

Join Retell AIAt Retell AI, we leverage first principles to revolutionize the call center experience through innovative voice AI technology.In just 18 months since our launch, our AI voice agents have been adopted by thousands of companies to manage sales, support, and logistics calls, significantly reducing the need for large teams of human agents. Supported by Y Combinator, Alt Capital, and other notable investors, we've achieved impressive growth, scaling from $5M to $36M ARR with a dedicated team of 20.Looking ahead to 2026, we aim to create a comprehensive AI-powered Customer Experience (CX) platform that transforms entire contact centers. Instead of simple automation requiring ongoing human oversight, we are developing intelligent AI "workers" that serve as frontline agents, QA analysts, and managers — perpetually executing, monitoring, and enhancing customer interactions.We're experiencing rapid growth and are on the lookout for passionate innovators eager to tackle complex technical challenges, accelerate progress, and make a significant impact at one of the leading voice AI startups.Let’s build the future together.Ranked in the top 50 AI applications by a16z: https://tinyurl.com/5853dt2x#4 on Brex's Fast-Growing Software Vendors list for 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on: https://leanaileaderboard.com/

Join Us in Combating the Escalating Wildfire Crisis with Cutting-Edge AI and IoT SolutionsAbout UsThe Challenge: In the face of climate change, wildfires are becoming more frequent and severe. Traditional methods of fire detection, reliant on bystanders and emergency calls, lead to critical delays in response times. Fire authorities require innovative solutions for faster detection, verification, and response to avert catastrophic fire outbreaks.Who We Are: Pano AI is a dynamic growth-stage startup based in San Francisco, comprising over 150 passionate professionals. We stand at the forefront of wildfire detection and intelligence, equipping fire services with timely information and advanced technology to enhance their response capabilities. Our platform integrates cutting-edge hardware, software, and AI, utilizing ultra-high-definition 360-degree cameras positioned strategically to provide real-time threat assessments. Our technology empowers fire professionals with actionable insights, enabling them to prevent minor flare-ups from escalating into significant disasters.Recognized by TIME as one of the 100 Most Influential Companies of 2025, and featured in MIT Technology Review's top 15 climate tech companies to watch, Pano AI is paving the way for innovative solutions in fire response. Our contributions have been recognized in major publications such as the Wall Street Journal and Bloomberg.

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.

Join Us at Retell AIRetell AI is revolutionizing the call center industry by leveraging innovative voice AI technology based on first principles.In just 18 months since our inception, we have attracted thousands of companies that rely on Retell's AI voice agents to efficiently manage sales, support, and logistics calls, previously handled by large teams of human agents. Supported by renowned investors such as Y Combinator and Alt Capital, we have rapidly grown from $5M to $36M in Annual Recurring Revenue (ARR) with a dedicated team of 20.Looking ahead to 2026, our ambition is to establish a state-of-the-art customer experience platform entirely powered by AI. We aim to create intelligent AI “workers” capable of serving as frontline agents, quality assurance analysts, and managers, continuously optimizing customer interactions without the need for constant human oversight.We are on an exciting growth trajectory and are seeking driven individuals who are eager to solve complex technical challenges, accelerate progress, and make a significant impact at one of the fastest-growing voice AI startups.Let’s innovate the future together!Ranked as a top 50 AI app by a16z: https://tinyurl.com/5853dt2x#4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on: https://leanaileaderboard.com/

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

At Crusoe, we are on a mission to expedite the availability of energy and intelligence. We are building the infrastructure that enables a future where individuals can pursue ambitious AI-driven projects without compromising on scale, speed, or sustainability.Join us in the AI revolution with sustainable technology at Crusoe. You will contribute to significant innovations, create a real impact, and join a team that leads the way in responsible and transformative cloud infrastructure.Role Overview:As we continue to grow, we are looking for a Construction Cost Estimator to enhance cost modeling and ensure financial precision across our capital projects. This pivotal role is essential for producing reliable outcomes by combining detailed cost estimation with proactive cash flow forecasting, thus supporting Crusoe's expansion worldwide.Key Responsibilities:Oversee comprehensive estimating processes for data center construction, from initial planning through to execution.Create detailed cost models that reflect design intentions, evolving scopes, and delivery strategies. Collaborate with design, procurement, and delivery teams to verify quantity take-offs and unit pricing.Develop and sustain project cash flow forecasts to aid in financial planning, budget management, and funding requests.Produce precise estimates for Civil, Structural, Architectural (CSA), Mechanical, Electrical, and Plumbing (MEP), as well as mission-critical systems for both domestic and international projects.Assess vendor and subcontractor proposals against internal standards and historical data.Analyze cost variances and model impacts from design alterations, procurement challenges, or schedule adjustments.Collaborate with finance, real estate, and development teams to inform business cases and funding strategies.Prepare clear cost reports, dashboards, and executive summaries that provide actionable insights and recommendations.Implement scalable tools and repeatable processes to support Crusoe's infrastructure development pipeline.Maintain historical cost databases and continuously improve models based on actual performance and market trends.Contribute to site feasibility evaluations and preconstruction planning using data-driven insights.Assist in value engineering initiatives and cost optimization strategies.