Full Stack Engineer for Ad Networks

About xAIAt xAI, we are on a mission to develop advanced AI systems that can profoundly comprehend the universe and support humanity in its quest for knowledge. Our team is compact yet highly driven, emphasizing engineering excellence and innovation. We seek individuals who relish challenges and thrive on curiosity, contributing directly to our mission in a collaborative, flat organizational structure. Initiative and a commitment to delivering outstanding results are paramount. Strong communication skills are essential, enabling team members to convey knowledge effectively and precisely. About the RolexAI has pioneered the creation of a 100k GPU cluster on an Ethernet network, achieving this remarkable feat twice in just 92 days. We are currently seeking an experienced engineer proficient in RoCEv2 to scale our operations while enhancing performance and reliability.Our rapid development pace with cutting-edge hardware is crucial in deepening our understanding of the universe. To achieve our next major breakthrough, we must take charge of our network performance and availability, optimizing them for our training models and customer inference queries. Your role will predominantly involve diving deep into NCCL, creating metric dashboards, and fine-tuning configurations to maximize performance. You will play a pivotal role in designing the next generation of our backend and front-end networks, enabling seamless expansion of our GPU infrastructure with minimal engineering intervention.Expect considerable travel to Memphis for capacity expansion, participation in team on-call rotations, and assistance with scaling and maintenance initiatives. This position promises to be both dynamic and rewarding.

About VoltaiAt Voltai, we are at the forefront of innovation, creating advanced world models and agents designed to learn, assess, strategize, experiment, and engage with the physical world. Our initial focus lies in developing cutting-edge hardware, electronic systems, and semiconductors, leveraging AI to design and generate solutions that exceed human cognitive capabilities.About the TeamOur team is backed by some of Silicon Valley's most distinguished investors, Stanford University, and leaders from industry giants like Google, AMD, Broadcom, and Marvell. We comprise former Stanford professors, SAIL researchers, Olympiad medalists (IPhO, IOI, etc.), CTOs from Synopsys & GlobalFoundries, and high-ranking officials including a former US Secretary of Defense and National Security Advisor.About this RoleIn this role, you will be responsible for designing and deploying high-performance network architectures that connect Voltai's computing infrastructure with distributed simulation environments. You will focus on optimizing latency, throughput, and fault tolerance to build intelligent network systems that can scale across global data centers and AI workloads.

About xAIAt xAI, our mission is to develop advanced AI systems that deepen our understanding of the universe and empower humanity's quest for knowledge. Our team is compact yet highly driven, dedicated to engineering excellence. We welcome individuals who thrive on challenges and possess a curious mindset. Operating with a flat organizational structure, we empower all employees to take initiative and directly contribute to our mission. Strong work ethic and prioritization are crucial, along with excellent communication skills to effectively share insights with teammates. About the RoleOur innovative platforms, Grok and X, rely on our robust on-premise infrastructure, enabling rapid deployment of extensive capacities. The seamless experience enjoyed by users during townhalls on X and while utilizing Grok for universal comprehension is made possible through our cutting-edge Edge networking infrastructure.We are looking for two seasoned Network Engineers to architect, develop, and enhance our peering and transit infrastructure, including routing policies, eDNS, cloud connectivity, CGNAT, and load balancer fleets. Ideal candidates will possess strong Python skills to automate processes and minimize customer impact.

Join xAI’s innovative security team as a Senior Network Security Engineer, where you will leverage your extensive knowledge in network security technologies, particularly in firewalls, VPNs, and routing protocols. Engage in a fast-paced environment that values adaptability and problem-solving skills, while ensuring the security of our cutting-edge AI infrastructure. Your role will involve implementing robust security measures, managing firewall configurations, and developing forward-thinking network security solutions that address our evolving challenges.

Join xAI, a pioneering company dedicated to building AI systems that enhance humanity's understanding of the universe. We are seeking a talented ML Infrastructure Network Development Engineer with a specialization in high-speed interconnect technologies. In this pivotal role, you will design, construct, and optimize the network architecture that underpins large-scale AI training and inference clusters. Your expertise will drive innovations in high-bandwidth, low-latency, and energy-efficient interconnects essential for our cutting-edge AI/ML infrastructures. You will engage with various interconnect modalities, ensuring seamless connectivity between GPUs and switches in data centers, and contribute to the overall success of our AI initiatives.

Join Teleo, an innovative robotics startup that is revolutionizing the construction industry. We specialize in transforming heavy construction equipment, such as loaders, dozers, excavators, and trucks, into autonomous robots. Our cutting-edge technology enables a single operator to effectively control multiple machines at once, enhancing operational efficiency, improving safety, and providing unparalleled comfort.Founded by Vinay Shet and Rom Clément, who previously spearheaded initiatives at Lyft’s Self Driving Car and Google Street View, Teleo is backed by prominent investors including YCombinator, Up Partners, and F-Prime Capital. Our solutions are already deployed across various continents and generating significant revenue.As we embark on a phase of rapid growth, this is an exceptional opportunity to join a team dedicated to creating impactful products in the realm of heavy machinery. You will be working on sophisticated 100,000-pound autonomous robots and engineering complex systems that integrate hardware, software, and artificial intelligence.About the Role In your role as a Wireless Networking Robotics Engineer at Teleo, you will spearhead the evolution and implementation of advanced wireless communication technologies, ensuring our fleet of heavy machinery operates seamlessly across a variety of environments and conditions. Your contributions will be pivotal in the success of Teleo’s Supervised Autonomy product, from quick assessments to thorough production deployments in the field. You will collaborate closely with both hardware and software teams at Teleo, integrating robust communication solutions to elevate reliability and uptime. Your involvement with domestic and international deployment teams will be key as we expand our market presence and introduce our groundbreaking solutions to new regions. We seek a passionate, multidisciplinary professional who excels at building reliable and reusable solutions. If you are excited to make a meaningful impact and be part of a team pioneering the future of heavy machinery, we want to hear from you! This position requires a willingness to travel at least 25% to construction sites at customer locations.

Located in the heart of Silicon Valley, genbio is an innovative start-up where a dynamic team of scientists, engineers, and entrepreneurs is revolutionizing the fields of biology and medicine through the transformative capabilities of Generative AI. Our team is composed of trailblazers in AI and Biological Sciences, continually redefining the limits of what can be achieved. We envision a groundbreaking paradigm shift in biology and medicine.At genbio, our mission is to provide a comprehensive understanding of biology, paving the way for the next generation of life-altering solutions. As a pioneer in pan-modal Large Biological Models (LBM), we are leading a new chapter in biomedicine, with our LBM training facilitating extraordinary advancements and a reimagined approach to healthcare. Our robust R&D team and expertise in LLM and generative AI place us at the cutting edge of this transformative industry. With our headquarters in California and a branch office in Paris, we are set to make a significant global impact. Join us on our journey to reshape the future of biology and medicine through the revolutionary power of Generative AI.

Harmony is an innovative open blockchain platform that utilizes data sharding and ensures rapid finality. Our on-chain tokens are designed for micro-payments in social games and community AI, leveraging smart contracts for market pricing and zero-knowledge proofs to maintain data privacy.Our mission at Harmony is to foster trust and establish a radically equitable economy. Our ecosystem is decentralized, scalable, and secure, enabling transactions without reliance on trusted intermediaries. Join Us in Building a Revolutionary PlatformAs a Day-1 startup, we recognize that while blockchain technology is set to become the backbone of the global economy, its current adoption stands at only 1%. This presents a unique opportunity for pioneers and developers to make a substantial impact—10X to be precise. Harmony is a collaborative project, featuring a network of hundreds of applications, and a team driven by ambitious goals. The unstoppable summer of innovation is upon us!For engineers, your profound understanding of data at the byte level is key. You are a tool creator, a systems innovator, and a mathematics enthusiast all rolled into one. A typical day may involve prototyping cutting-edge research, debugging intricate systems, or coordinating updates with a diverse team of engineers in an open setting. Building blockchain technology is akin to assembling an aircraft mid-flight—if you thrive in chaos, this is your arena!For creatives, your passion for user experience is essential. You embody the roles of product designer, brand strategist, and market analyst simultaneously. Your daily tasks could include analyzing user satisfaction through data analytics, crafting compelling narratives on product development, or orchestrating tasks for product launches to engage millions of users. Cultivating a community is like nurturing a culture over decades—if this aligns with your long-term vision, start your journey with us today! Explore our vision for the future at Social A(G)I and Shard 1.

At Rhoda AI, we are pioneering a comprehensive platform for the next generation of humanoid robots. Our cutting-edge technology encompasses high-performance, software-defined hardware alongside sophisticated foundational models and video world models. Our robots are crafted to be versatile and capable of navigating complex, real-world scenarios that may not be covered in traditional training. We are at the forefront of large-scale learning, robotics, and systems integration, boasting a research team that includes esteemed professionals from Stanford, Berkeley, Harvard, and other prestigious institutions. With over $400 million raised, we are committed to significantly investing in research and development, hardware innovation, and scaling up our manufacturing processes to realize our vision.We are seeking a talented mid-to-senior Application Engineer who will be instrumental in translating real-world customer use cases into effective intelligent robot deployments. You will engage in the design, prototyping, and enhancement of grippers, end-of-arm tooling, workstations, and integration hardware. Additionally, you will develop efficient strategies for robot learning and data collection, operating at the confluence of robotics, artificial intelligence, hardware, and deployment operations.

Join our innovative team at Mashgin, where we are transforming the landscape of AI technology! As an AI Developer, you will work on cutting-edge projects that leverage artificial intelligence to enhance user experiences and improve operational efficiencies. We are looking for talented individuals who are passionate about AI and eager to contribute to our mission of making technology more accessible and intuitive.

Rubrik, Inc. is hiring a Staff Software Developer focused on Enterprise AI at its Palo Alto, CA office. This position centers on designing and building advanced AI solutions for business operations and customer-facing products. Role overview This role involves developing AI-driven tools and systems that improve efficiency and support customer needs. The work directly influences the direction and impact of Rubrik’s AI initiatives. Key responsibilities Lead the creation and implementation of enterprise-scale AI solutions Collaborate with teams to identify opportunities for AI-driven improvements Contribute technical expertise to shape Rubrik’s future AI capabilities Location This role is based in Palo Alto, CA.

About xAIAt xAI, we are committed to developing advanced AI systems that accurately interpret the universe and support humanity's quest for knowledge. Our agile team is comprised of highly motivated individuals who prioritize engineering excellence. We welcome those who relish challenges and are driven by curiosity. Operating with a flat organizational structure, we encourage hands-on contributions from all team members to fulfill our mission. Initiative and a track record of excellence are recognized and rewarded. Strong communication skills are essential for effectively sharing knowledge within our team.About the RoleThe Imagine Product team is at the forefront of transforming AI-enhanced media experiences for Grok users globally. In this pivotal role, you will architect and scale robust, high-performance systems that facilitate engaging, multi-modal media interactions—utilizing state-of-the-art AI for the seamless generation, processing, and delivery of a variety of media formats including images, videos, and audio. Your contributions will enhance real-time user experiences that captivate millions, turning sophisticated multimodal models into production-ready features. If you are a passionate problem-solver with a keen interest in AI and media technologies, and are eager to create scalable solutions that influence the future of consumer AI, this is your chance to make a significant impact.

About UsAt Hippocratic AI, we are pioneers in the realm of generative AI for healthcare. Our innovative system enables safe and autonomous clinical dialogues with patients, achieving over 99.9% accuracy through our proprietary large language models (LLMs) within the Polaris constellation.Why Join Our TeamTransform healthcare with safety in mind. We are developing the world’s first healthcare-specific, safety-centric LLM, a revolutionary platform aimed at enhancing patient outcomes globally. This represents a new category in healthcare technology.Collaborate with industry leaders. Co-founded by CEO Munjal Shah alongside a team of esteemed physicians, hospital executives, AI innovators, and researchers from top institutions such as El Camino Health, Johns Hopkins, Stanford, Google, and NVIDIA.Supported by premier investors. Recently, we secured $126M in Series C funding at a $3.5B valuation, led by Avenir Growth, contributing to a total funding of $404M from notable investors including CapitalG, General Catalyst, and a16z.Work with the best minds in healthcare and AI. Join a team dedicated to improving healthcare, advancing science, and creating transformative technologies that ensure our platform is powerful and trusted.About the RoleAs an AI Engineer at Hippocratic AI, you will be instrumental in advancing voice-based generative AI in healthcare. Your responsibilities will include designing and developing intelligent systems that power our clinically safe healthcare agents, integrating large language models with real-time voice technology and human-centered design.This is a hands-on, cross-functional position, requiring close collaboration with AI researchers, product managers, and clinical experts to deploy advanced language and speech models. Your contributions will significantly shape how patients and providers interact safely with generative AI.

Join Our Mission at Hippocratic AIHippocratic AI stands at the forefront of generative AI in healthcare, pioneering a revolutionary platform that enables safe and autonomous clinical interactions with patients. Our proprietary large language models (LLMs) within the Polaris constellation have achieved an unmatched accuracy of over 99.9%.Why Become Part of Our Team?Transform Healthcare Through Innovation. We are developing the first safety-first healthcare LLM, a groundbreaking initiative aimed at enhancing patient outcomes globally. Be part of a category-defining journey.Collaborate with Visionaries. Our founding team includes CEO Munjal Shah alongside esteemed physicians, hospital executives, AI innovators, and researchers from prestigious institutions such as El Camino Health, Johns Hopkins, Washington University in St. Louis, Stanford, Google, Meta, Microsoft, and NVIDIA.Supported by Premier Investors. Recently, we secured a $126 million Series C funding round at a valuation of $3.5 billion, led by Avenir Growth, totaling $404 million in funding with contributions from CapitalG, General Catalyst, a16z, Kleiner Perkins, Premji Invest, UHS, Cincinnati Children’s, WellSpan Health, and notable individual investors.Work with Top Talent in the Field. Collaborate with experts dedicated to improving healthcare, advancing scientific research, and creating transformative technologies that ensure our platform is both powerful and trustworthy.Location RequirementTo foster collaboration and a dynamic team culture, this position is based in our Palo Alto office five days a week, unless otherwise specified.About the RoleWe are seeking a talented AI Integration Engineer to connect healthcare data systems with our clinical AI platform. This role sits at the nexus of healthcare interoperability, system design, and data engineering, focusing on integrating EHRs, APIs, and analytics pipelines essential for scaling our AI models.As part of this role, you will work closely with delivery leads, product managers, and customer engineers to design and implement reliable integrations using contemporary interoperability standards. Your primary responsibilities will involve Python-based data transformation and interface development, integrating with HL7 v2, FHIR, and RESTful APIs. You will also collaborate with offshore engineers to ensure timely and high-quality solution delivery.

About NubankNubank is a leading digital financial platform, serving over 127 million customers across Brazil, Mexico, and Colombia. Our mission is to simplify financial services and empower individuals, heralding a transformative purple future in Latin America.As a publicly traded company on the New York Stock Exchange (NYSE: NU), we leverage proprietary technology and data intelligence to deliver financial products that are accessible and user-friendly.Our innovation has been recognized globally, featuring in esteemed rankings like Time 100 Companies, Fast Company’s Most Innovative Companies, and Forbes World’s Best Bank. Explore more about joining our team on our Careers page!About the RoleAt Nubank, AI is central to our strategy for growth and innovation. We are evolving into an AI-native company where intelligent systems not only enhance our products but fundamentally shape them. As the Lead Software Engineer for AI Agents & Orchestration, you will play a pivotal role in this transition.Your responsibilities will include steering the technical strategy for the integration of Generative AI and Large Language Models (LLMs), impacting the experience of over 130 million customers. This position emphasizes building production-grade workflows and RAG pipelines that operate efficiently across various markets. You will utilize our specialized GenAI Platform, which encompasses inference services, evaluation frameworks, and orchestration layers, to transition from experimental phases to substantial global impact at 'Nu-speed'.Why This Role Stands OutAgency & Transformation: You are not just another team member; you are a key architect of the AI Native Bank.Impact at Scale: Your contributions will empower a diverse population exceeding that of many countries.The AI Multiplier: You will engage in a structured framework that acknowledges and rewards the innovative advancements you drive through AI.ResponsibilitiesLead AI Architecture: Define the technical vision for AI-native applications, ensuring that our LLM integrations are scalable, cost-effective, and dependable.Develop Agentic Workflows: Create and implement sophisticated agentic systems and RAG patterns that offer hyper-personalized financial experiences.Pursue Engineering Excellence: Establish the standard for AI development at Nubank, promoting reusable components.Collaborate Across Teams: Work alongside Product, Design, and other departments to ensure seamless integration of AI technologies.

Join Klaviyo as a Senior Lead AI Engineer and be at the forefront of creating innovative AI solutions that enhance customer experiences and drive business growth. In this role, you will lead a team of talented engineers, collaborating on cutting-edge AI technologies and methodologies. Your expertise will help shape the future of our AI initiatives, making a significant impact on our product offerings.

Hippocratic AI is building generative AI systems for healthcare, focused on safe, autonomous clinical conversations. The company’s proprietary large language models (LLMs) power these interactions, achieving an accuracy rate above 99.9%. This team is developing a healthcare-exclusive, safety-first LLM platform with the goal of improving patient outcomes worldwide. The company is led by CEO Munjal Shah and a group of physicians, hospital executives, AI researchers, and engineers from organizations such as El Camino Health, Johns Hopkins, Stanford, Google, Meta, Microsoft, and NVIDIA. Hippocratic AI is backed by leading investors in healthcare and AI, including Avenir Growth, CapitalG, General Catalyst, and a16z. The company recently completed a $126 million Series C round, reaching a $3.5 billion valuation and $404 million in total funding. Role overview The Staff AI Engineer will shape the technical direction for voice-based generative AI in healthcare. This position involves designing intelligent systems that enable clinically safe healthcare agents, blending expertise in large language models, real-time voice interaction, and user-centered product development. This is a hands-on role with significant impact. The Staff AI Engineer will oversee one or more core AI domains, such as retrieval-augmented generation (RAG), agent orchestration, evaluation, or real-time voice. Collaboration with AI researchers, product managers, and clinical experts is central, as is mentoring engineers across the organization. Contributions in this role will influence how patients and providers interact with generative AI at scale. Hippocratic AI seeks experienced technical leaders who want to apply AI to real-world healthcare challenges and set high standards for technical excellence. Location requirement This position is based in Palo Alto and requires in-person attendance at the office five days a week unless otherwise specified.

Hippocratic AI develops generative AI technology designed for healthcare, focusing on safe and autonomous clinical conversations between patients and providers. Their proprietary large language models, built within the Polaris constellation, have reached an accuracy rate above 99.9%. The company is mission-driven, working to create the first healthcare-specific, safety-focused LLM with the goal of improving patient outcomes around the world. Leadership includes physicians, hospital executives, AI researchers, and technologists from organizations such as El Camino Health, Johns Hopkins, Stanford, Google, Meta, Microsoft, and NVIDIA. Hippocratic AI is well-funded, having recently completed a $126M Series C round at a $3.5B valuation, with total funding now at $404M from investors including Avenir Growth, CapitalG, General Catalyst, a16z, and others. Collaboration is central to the company’s culture. Team members work closely with leaders in healthcare and AI, advancing both clinical care and technology. Location and On-site Requirement This Senior Staff AI Engineer position is based in Palo Alto. The role requires on-site presence five days a week to support close collaboration and maintain a strong team culture, unless otherwise specified. Role Overview The Senior Staff AI Engineer leads technical strategy for voice-driven generative AI in healthcare. This role designs and builds core platforms that enable clinically safe healthcare agents, integrating large language models, real-time voice systems, and human-centered product design. As one of the most senior individual contributors, this engineer drives initiatives in retrieval-augmented generation (RAG), agent orchestration, evaluation, real-time voice technology, and safety. Key Responsibilities Partner with the executive team, AI researchers, product managers, and clinical experts to define and execute technical vision Design and build core platforms for healthcare AI agents, focusing on safety and clinical accuracy Mentor Staff and Senior engineers, guiding architectural decisions for future platform generations Represent Hippocratic AI in research and healthcare forums, contributing to the evolution of healthcare AI The work in this role directly influences patient care and the development of safe, effective AI solutions in healthcare.

Join us at Rhoda AI, where we are pioneering the full-stack foundation for the next generation of humanoid robots. Our mission encompasses everything from high-performance, software-defined hardware to the foundational models and video-based world models that govern them. Our robots are designed to navigate complex, real-world environments and tackle scenarios that have not been encountered during training. We are a collective of top-tier researchers from esteemed institutions like Stanford, Berkeley, and Harvard, focusing on the intersection of large-scale learning, robotics, and systems. With over $400M raised, we are committed to substantial investments in R&D, hardware development, and scaling manufacturing to bring our vision to life.As a Robotics Software Engineer, you will play a crucial role in developing and maintaining the software that drives our robots. Your primary focus will be on integrating sensors and perception systems to facilitate reliable operations in varied customer environments.