Senior HPC & GPU Infrastructure Engineer

At Sciforium, we are at the forefront of AI infrastructure, pioneering advanced multimodal AI models and an innovative, high-efficiency serving platform. With substantial backing from AMD and a dedicated team of engineers, we are rapidly expanding our capabilities to support the next generation of frontier AI models and real-time applications.About the RoleW…

ABOUT RETELL AIAt Retell AI, we are revolutionizing the call center experience using cutting-edge voice AI technology. In just 18 months since our inception, thousands of companies have leveraged our AI voice agents to streamline sales, support, and logistics operations that previously required extensive human teams. Supported by prominent investors such as Y Combinator and Alt Capital, we have grown from $5M to an impressive $36M ARR with a dedicated team of 20.Our ambitious vision for 2026 is to create a state-of-the-art customer experience platform where entire contact centers are driven by AI. Rather than relying on basic automation that necessitates constant human oversight, we are developing intelligent AI “workers” to function as frontline agents, QA analysts, and managers—constantly executing, monitoring, and enhancing customer interactions.As we rapidly expand, we seek passionate innovators eager to solve complex technical challenges, move swiftly, and make a meaningful impact at one of the fastest-growing voice AI startups. Join us in building the future!Ranked among the top 50 AI applications in the a16z list: https://tinyurl.com/5853dt2xRanked #4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on the Leana I leaderboard: https://leanaileaderboard.com/THE ROLEWe are in search of a Principal/Staff Engineer to spearhead the technical direction of our core platform. This is an individual contributor role designed for someone who excels in uncertainty, acts swiftly, and elevates the standards of those around them.You will engage with various systems, infrastructure, and product surfaces while collaborating closely with engineering teams, product managers, and leadership to scale successful initiatives and innovate for the future.This role is not about merely addressing tickets; you will identify challenges, engineer solutions, and deliver impactful results.KEY RESPONSIBILITIESLead the design and evolution of our core platform and systems architecture.Oversee complex technical projects from inception to production.Make strategic technical decisions that optimize for speed, reliability, and scalability.Collaborate across teams to facilitate knowledge sharing and best practices.

At Drivetrain, we are dedicated to revolutionizing the way businesses approach financial planning and decision-making. Our innovative platform empowers companies to scale efficiently and meet their goals with confidence.Founded in 2021 by former Google engineers, Drivetrain operates as a remote-first organization with its headquarters in the San Francisco Bay Area. We're a rapidly growing startup backed by prominent venture capital firms, positioning ourselves for continued success. Remote-friendly: We gather top talent from around the world, providing them with autonomy and trust to excel in their roles. Open & transparent: We believe that access to information drives creativity and productivity, enabling our team to produce their best work. Idea-friendly: Our culture fosters innovation, allowing everyone to propose ideas and contribute to meaningful change. We celebrate the best ideas. Customer-centric: Our product-led growth strategy prioritizes learning from our customers, collaborating closely to build exceptional software.

At Rylo, we are revolutionizing the way video is captured and shared. Our innovative camera technology records stunning, immersive video effortlessly, eliminating the hassle of traditional filming and editing. Built by a talented team of former engineers from Instagram and Apple, our advanced stabilization software and intuitive smartphone app allow users to create beautiful videos without the stress of perfect framing or stability. Simply hit record and enjoy the magic of producing flawless video content after the fact.Watch Rylo in actionJoin us at Rylo and become part of a dynamic team focused on developing cutting-edge consumer camera technology. You will have a unique chance to drive software advancements and influence hardware design, paving the way for innovative computational photography solutions.

About KiddomKiddom is an innovative educational platform dedicated to fostering equity and growth in students by integrating high-quality instructional materials with engaging digital learning experiences. Our platform enables schools and districts to take charge of their curricula, resulting in personalized learning experiences that cater to the unique needs and goals of local communities. With comprehensive insights for teachers and leaders, Kiddom supports ongoing improvement in instructional decision-making, school programming, and professional development.The Systems Engineering and Core Services team is responsible for the foundational APIs, services, data storage solutions, and developer tools that ensure an exceptional product experience for our users and a seamless developer experience for our engineering teams. A typical day involves identifying challenges and collaborating cross-functionally to devise effective project plans that tackle complex problems.In this position, you will merge technical leadership with strategic influence, shaping Kiddom’s systems for scalability each academic year. You will work with programming languages like Go, TypeScript, and Python, utilizing technologies ranging from web APIs to graph databases, edge computing, and large language models (LLMs). This is a unique opportunity to spearhead technical advancements across the organization, guiding fellow engineers to achieve their best work with the tools you select and advocate for. You are exceptionally skilled at troubleshooting issues such as null pointer exceptions.Note: A set of questions is included in the application process. Failure to complete them or selecting N/A will automatically disqualify you.

Midstream is an innovative financial operating system tailored for the healthcare sector, leveraging cutting-edge AI technology. Founded by seasoned entrepreneurs and supported by leading investors, we empower finance, supply chain, and managed care teams with immediate insights into margin risks, along with actionable strategies to mitigate them.Designed specifically for the intricacies of healthcare, Midstream converts structured, unstructured, and external data into real-time, contract-aware insights that facilitate informed decision-making. Our AI-driven solutions enhance the back-office operations by unifying spending and revenue processes, continuously learning from interactions to provide unparalleled intelligence that surpasses traditional solutions.We are revolutionizing the pace of healthcare finance, transforming lengthy processes into swift, actionable insights.OpportunityJoin Midstream at a pivotal moment in our journey and play a crucial role in developing our foundational product. You will collaborate at the intersection of product development, systems architecture, and cloud infrastructure, designing and constructing a machine learning and AI-centric platform. This position is ideally suited for mid-senior level engineers who possess a passion for enhancing user experiences, with a focus on scalability, reliability, and performance.This role is hybrid, based in the Bay Area.What You'll Be DoingWe are seeking a motivated Software Engineer to take charge of vital components of our software platform. You will engage with healthcare data, contributing to capabilities that support medical provider networks in securely and efficiently managing sensitive information to enhance outcomes in the healthcare industry. Your responsibilities will encompass:SaaS Platform & Infrastructure: Develop essential elements of our multi-tenant SaaS platform, including Identity & Access Management, connector provisioning, and infrastructure improvements to enhance speed and service integration.API Development: Contribute to the design and implementation of APIs and data models, ensuring they cater to various sectors and effectively support both open/shared and client-specific datasets.ML Platform Development: Utilize existing foundational models while creating innovative ML solutions to address challenges posed by complex, high-dimensional healthcare data.Agentic Workflows: Develop tools and agents to enhance our natural language processing capabilities, improving user interactions.

About the TeamThe IT Systems Operations team is crucial in connecting Security, Engineering, and Employee Technology platforms, ensuring that employee-facing systems, identity workflows, and enterprise applications operate smoothly and reliably as the organization grows.In addition to implementation, the team creates structured operating patterns that guarantee platform changes, access models, integrations, and lifecycle workflows evolve safely and consistently throughout the enterprise environment.About the RoleAs an IT Solutions Engineer, you will take ownership of identity-connected enterprise SaaS platforms and system change controls to uphold OpenAI’s compliance standards. Your responsibilities will include ensuring that production configurations, access models, and platform changes are compliant, auditable, and operated through defined controls. You will manage and operationalize controlled system and workflow changes across various identity platforms, SaaS applications, collaboration tools, and enterprise infrastructure.Collaboration with Security, Platform Engineering, and IT Support Operations is essential, as you will:Ensure consistent behavior of identity and access workflows across systemsImplement structured rollout and configuration practices for enterprise applicationsEnhance visibility and traceability of system changes affecting employee workflowsTranslate operational requirements into durable automation and policy-aligned implementationsSuccess in this position requires not only strong engineering skills but also sound operational judgment, meticulous documentation practices, and effective cross-functional collaboration.In this role, you will:Enterprise SaaS & Identity Platform OwnershipManage administration and operational stewardship of enterprise SaaS and identity-connected platforms, ensuring configuration integrity, access governance, and compliance with established control requirements.Oversee onboarding, access modification, and offboarding workflows aligned to standardized entitlement models.Guarantee reliable propagation of lifecycle events across downstream systems and maintain an accurate, auditable access state.

About HandshakeHandshake serves as the premier career network tailored for the burgeoning AI economy. Trusted by 20 million knowledge workers, 1,600 educational institutions, and a million employers—including every Fortune 50 company—Handshake is pivotal in facilitating career discovery, hiring, and upskilling, from freelance AI training roles to internships and full-time positions. Our unique value proposition has led to exceptional growth, with our Annual Recurring Revenue (ARR) projected to triple by 2025.Why You Should Join Handshake Now:Influence the evolution of careers within the AI economy on a global scale, making a tangible impact for your community.Collaborate with elite AI labs, Fortune 500 partners, and leading educational institutions.Join a team led by professionals from Scale AI, Meta, xAI, Notion, Coinbase, and Palantir, among others.Contribute to building a rapidly expanding business projected to generate billions in revenue.About the RoleThe Senior Engineering Manager at Handshake AI will oversee a vital product and platform engineering team responsible for developing systems that seamlessly integrate human expertise into AI development workflows. This team manages essential infrastructure that links talent networks, data operations, and research requirements into scalable, reliable, and high-quality platforms. You will play a pivotal role at the crossroads of engineering, product, and operations, ensuring our systems can accommodate rapid growth, intricate workflows, and cutting-edge AI partners. You will lead a team of approximately 9 engineers and will be expected to expand leadership capacity, including managing another engineering manager, as we scale.Location: San Francisco, CA. This position requires in-office attendance, 5 days/week (no remote or hybrid options).Your ResponsibilitiesLead, recruit, and nurture a high-performing engineering team focused on developing core product and platform infrastructure.Define and execute the roadmap in close collaboration with Product, Research, and Operations teams.Drive the architectural and technical strategy for scalable, reliable, and extensible systems.Develop modular platforms that facilitate quick launches for new domains, workflows, and partners.Enhance engineering standards across reliability, observability, performance, and data integrity.Cultivate a culture of ownership, accountability, and continuous improvement within the team.

About the TeamFounded in 2018, DoorDash Labs is the innovation engine of DoorDash, dedicated to pioneering automation and robotics solutions that enhance last-mile logistics. Our mission is to develop technologies that empower human networks, driving efficiency for Dashers, merchants, and consumers. With a focus on impactful business solutions, our highly experienced team is composed of industry leaders from various robotics fields. As we look towards the future, we aim to improve upon our achievement of 10 billion deliveries by 2025.About the RoleWe are looking for a Senior Electrical Engineer to join our dynamic, multidisciplinary team, specializing in the creation of production-grade electrical systems for consumer and enterprise hardware platforms, including tablets, POS systems, peripherals, and connected devices.This role requires a robust background in mixed-signal board design, power systems, wireless integration, and high-volume product development. The ideal candidate is passionate about designing and delivering reliable hardware at scale, thriving in an environment that demands technical expertise and high-quality execution across multiple concurrent projects.You’re excited about this opportunity because you will…Architect and implement electrical subsystems, including:Power systems: battery management, charging, DC/DC converters, power distribution, and protection.Digital and mixed-signal board design: application processors, MCUs, high-speed interfaces (USB, PCIe, MIPI, etc.), memory, and sensor integration.Wireless systems: WiFi, BLE, LTE, antennas, and EMI/EMC-conscious layout and integration.Peripheral and display integration: touch interfaces, display subsystems, and external connectivity.Key ResponsibilitiesOwn the full lifecycle of electrical hardware from concept through schematic capture, layout review, bring-up, validation, certification, and production.

About FaireFaire is a revolutionary online wholesale marketplace that champions local commerce, believing in the strength of independent retailers. These retailers are generating more revenue globally than giants like Walmart and Amazon, yet they remain small compared to these corporate titans. At Faire, we harness technology, data, and machine learning to bridge the gap between these vibrant entrepreneurs and the best products from around the world. Our mission is to empower local businesses with the right tools and insights, leveling the playing field against big box and e-commerce competitors.By nurturing the growth of independent businesses, Faire is creating a positive economic impact in communities worldwide. We are on the lookout for innovative, resourceful, and passionate individuals to join us in our quest to revolutionize local shopping. If you share our belief in the power of community, we invite you to be a part of ours.About the RoleAre you enthusiastic about leveraging data and AI to redefine product features for small and medium businesses (SMBs)? If this resonates with you, we want to connect! We are seeking a technical leader to collaborate with Data Scientists, Product Analysts, and Software Engineers to enhance product launches and roadmaps. You will be instrumental in designing and developing data capabilities that drive insights and inform decision-making. This role will put you at the forefront of utilizing AI to enhance productivity and transform analytical engineering processes—streamlining data pipeline development, optimizing data consumption workflows, and automating routine analytical tasks. Your contributions will have a direct impact on company growth and user satisfaction. Join our team of top-tier professionals, work with one of the richest datasets available, and see your efforts translate into real-world applications for SMBs.Join us and contribute to a culture that values data-driven innovation and excellence.

About FaireFaire is a dynamic online wholesale marketplace that champions local entrepreneurship. We believe in the power of small, independent retailers who collectively generate more revenue than giants like Walmart and Amazon. Our mission is to empower these businesses through cutting-edge technology, data insights, and machine learning, enabling them to find unique products from around the world to offer in their stores. We strive to level the competitive field, allowing small businesses to thrive against larger corporations.By nurturing the growth of independent retailers, Faire is making a significant economic impact in communities worldwide. We are looking for talented, innovative, and dedicated individuals who share our passion for supporting local businesses. If you resonate with the values of community and collaboration, we invite you to be a part of our mission.Role Description:As a pivotal member of our Engineering organization, you will be at the forefront of developing the software that powers our marketplace. The Product Security team plays a crucial role in enabling our product engineering teams to build and deploy secure software solutions. We prioritize strong engineering practices and are passionate about writing scalable, maintainable, and secure code that successfully caters to millions of users. Our approach focuses on building reusable frameworks, consulting with product teams, leveraging data insights, and continuously iterating on our processes.In your role as a Senior Staff Software Engineer specializing in Product Security, you will take the lead in defining the technical vision for security practices across Faire’s application stack. You will collaborate closely with Platform and Product Engineering teams to identify and mitigate security vulnerabilities, spearhead critical security initiatives, and mentor fellow engineers to elevate secure engineering standards throughout the organization.Your efforts will also include leading cross-functional programs that integrate security deeply into our architecture, pipelines, and overall developer experience, ensuring a balanced approach that minimizes risk while maintaining development velocity.As a Senior Staff Software Engineer, Product Security, you will collaborate with us to:Establish a long-term technical strategy for application security at Faire, creating scalable and developer-friendly frameworks that facilitate secure development across all product domains.

Join the Team at CheckAt Check, we simplify the process of paying employees. As pioneers of embedded payroll, we are not merely creating our own business; we are collaborating with our partners to establish and elevate payroll solutions. Our innovative approach is reshaping how payroll is executed, making it more accessible for businesses to launch, expand, and thrive.Check offers more than just API infrastructure; we provide a launching pad for payroll enterprises.About Our TeamThe payroll landscape is in need of reform. Join a passionate team at Check where your creative problem-solving and critical thinking skills will drive meaningful change. We view challenges as opportunities for contribution, breaking free from traditional role definitions to leverage the unique strengths of each team member in pursuit of our mission.If you're enthusiastic about transforming payroll and making a significant impact, we invite you to help us simplify complexities and forge a brighter future for all businesses.At Check, we refer to our clients as "partners" to highlight the strong relationships and shared goals we cultivate with those who utilize our software. Our Partner Engineering team is committed to empowering partners to unlock the full capabilities of their payroll solutions through proactive strategic and technical support. This commitment encourages product adoption, broadens partnerships, and drives growth.About the Partner Engineering TeamThe Partner Engineering team plays a pivotal role in boosting revenue by leveraging deep technical knowledge, both as consultants and hands-on engineers, to enhance business outcomes for our partners. Our team guides partners through the entire journey, from initial discussions to the successful implementation of embedded payroll solutions. We develop code, construct systems, and deliver features in collaboration with Check's core engineering team. Additionally, we partner with cross-functional teams—sales, engineering, and product management—to ensure partners can seamlessly integrate and derive maximum value from our platform. Partner Engineers also spearhead Check's AI initiatives, integrating advanced capabilities across our products and internal tools.

Join the Revolution at CheckAt Check, we simplify the process of paying people. In doing so, we’re not just enhancing our own business; we’re collaborating with our partners to build payroll solutions that redefine how payments are made. As pioneers of embedded payroll, we’re reshaping the landscape for payroll businesses, enabling them to launch, scale, and flourish. Explore our journey | Listen in.Check is more than just API infrastructure; we are a launchpad for innovation in payroll.Our Dynamic TeamPayroll is in need of transformation. Join a passionate team that thrives on collaboration! At Check, you’ll employ your creative problem-solving skills, critical thinking, and determination to impact every business we collaborate with. We see challenges as opportunities for improvement, valuing the unique strengths and contributions of each team member in our quest to revolutionize payroll.If you’re eager to dive in and make a substantial difference, come join us in simplifying complex systems and fostering a better future for businesses of all sizes.Your RoleIn this role, you’ll leverage strong engineering principles to develop software that significantly enhances the operational efficiency of payroll businesses. Our platform facilitates financial transactions, tax calculations, and compliance workflows for numerous enterprises. Much of your work will involve transforming intricate infrastructures into dependable, user-friendly systems for our partners and operators.Our engineering team utilizes cloud-native tools managed through infrastructure-as-code, running a Python modular monolith that balances distributed systems principles with the simplicity and ownership benefits of a mono-repo. We depend on conventional HTTP APIs and robust asynchronous workflows to manage everything from financial transactions to tax filings.Your responsibilities will span a variety of challenges, developing software that enables Check to respond swiftly and serve partners and internal teams more effectively. Some tasks will align with larger engineering initiatives while others will arise from the continually evolving demands of the business—be it a partner request, an upgrade to internal tools, optimizing workflows, or addressing product gaps. If you thrive on quickly grasping context, tackling challenges head-on, and delivering practical solutions, you will excel in this environment.

About GigaenergyAt Gigaenergy, we are pioneering the development, construction, and operation of AI-driven energy infrastructure that powers today's world. Our goal is to revolutionize the energy infrastructure experience for good. With a vertically integrated model encompassing site origination, development, infrastructure manufacturing, and participation in power markets, we are positioned to deliver projects at an unprecedented pace. Founded in Texas, we collaborate with AI hyperscalers, data center operators, and other energy infrastructure teams to accelerate project timelines.Why Join UsAccelerated Pace: Take charge of projects that progress faster than any other in the industry.Significant Impact: Be the driving force behind transforming concepts into actionable contracts and secured permits.Exceptional Team: Collaborate with a top-tier group of engineers and builders shaping the future of AI infrastructure. What You'll DoAs a Project Engineer, you will be instrumental in bringing Gigaenergy’s electrical infrastructure initiatives to fruition. Your role involves converting customer and utility needs into comprehensive site plans and electrical designs, ensuring our systems achieve performance, safety, and budgetary objectives. You will engage cross-functionally with utilities, suppliers, electricians, and internal teams to manage projects from the initial concept to full deployment.This position is ideal for individuals who thrive in fast-paced settings, enjoy hands-on problem-solving in the field, and possess the technical expertise to confidently engage in medium-voltage design discussions with partners and vendors.Where You'll WorkThis position is based at our office in San Francisco, where you will be expected to work full-time, with the exception of our bi-weekly Work From Home Fridays.

Join Cloudflare as a Senior Software Engineer in our Network Development team, where you will design and implement innovative network solutions that enhance our global infrastructure. This role offers the opportunity to work with cutting-edge technologies and collaborate with talented engineers to drive significant improvements in network performance and reliability.

Join Cloudflare as a Software Engineer in the Workers Builds & Automation team, where you will have the opportunity to develop innovative solutions that enhance our serverless platform. You will work collaboratively with a talented group of engineers to build features that empower developers to create and deploy applications with ease. Your contributions will directly impact the performance and scalability of our services.

Join Bugcrowd, a pioneer in crowdsourced security, committed to empowering organizations since 2012. Our innovative platform combines the expertise of elite hackers with cutting-edge AI technology, enabling businesses to proactively combat threats and safeguard their digital assets. With our patented Security Knowledge Platform™ and CrowdMatch™ technology, we provide unparalleled scalability and adaptability in addressing evolving security challenges. Discover how our diverse network of hackers can uncover vulnerabilities and help you stay ahead of cyber threats at www.bugcrowd.com.Job SummaryWe are on the lookout for a dynamic Software Engineering Manager to spearhead our Identity and Access Management (IAM) team. This pivotal role will involve leading the design, development, and management of secure, scalable authentication and identity services that are foundational to our product offerings. The ideal candidate will possess a robust technical background in contemporary identity standards and a successful history of mentoring high-performing engineering teams.

About Atomic SemiAtomic Semi is at the forefront of semiconductor innovation, creating a compact and efficient fabrication environment that leverages cutting-edge technology.We are committed to building our own tools to facilitate rapid iterations and enhancements to our processes.Our elite team of engineers, specializing in mechanical, electrical, hardware, computing, and process engineering, is dedicated to pushing the boundaries of technology from atoms to architecture.We believe smaller, faster, and self-built systems represent the future.Equipped with advanced 3D printers, microscopes, e-beam writers, and a variety of fabrication tools, we’re prepared to invent solutions as we encounter challenges.Founded by renowned semiconductor experts Sam Zeloof and Jim Keller, Atomic Semi combines years of industry experience with a passion for innovation.About the RoleWe are seeking enthusiastic Process Engineering Interns for the fall term, starting in September. This internship is designed for a duration of 4 to 8 months, providing you with a unique opportunity to engage in groundbreaking work as we re-engineer the chip fabrication process from the ground up.This hands-on role will have you involved in the design and execution of experiments related to novel semiconductor and thin-film fabrication techniques. We are looking for candidates with a solid understanding of traditional semiconductor processing methods and an eagerness to explore innovative techniques.This position offers a high level of ownership and autonomy in a dynamic startup environment, allowing you to contribute meaningfully to novel R&D processes and influence equipment design. Candidates should possess hands-on cleanroom experience and a proven track record of developing nanofabrication recipes across multiple process stages.

Join Alchemy as a Data Analytics Engineer, where you will play a pivotal role in transforming raw data into actionable insights. You will collaborate with cross-functional teams to design, implement, and maintain data pipelines that drive strategic decision-making.Your expertise will help shape the future of our data-driven initiatives, allowing you to contribute to innovative projects that have a tangible impact. If you're passionate about data analytics and thrive in a fast-paced environment, we want to hear from you!

Empower Every Identity, from AI to HumansAt Okta, we recognize that identity is the cornerstone of unlocking AI's potential. We secure AI by developing trusted, neutral infrastructures that allow organizations to safely navigate this transformative era. This endeavor demands a relentless commitment to addressing complex challenges with significant real-world implications. We seek builders and innovators who act with urgency and deliver excellence.The Core Engineering TeamOkta facilitates secure authentication and authorization for thousands of organizations globally, ensuring safe and seamless access for billions of logins. Our Core team is dedicated to creating software and frameworks while collaborating with infrastructure teams to achieve an exceptional 99.99% uptime for our core products.The Software Engineering Manager RoleAs part of Okta's Core Engineering team, you will lead the evolution of shared infrastructure and services that underpin all engineering efforts. Our responsibilities encompass essential shared services like search, cache, configuration management, asynchronous job management frameworks, and email pipelines. Being cloud-native, we prioritize redundancy, multi-tenancy, scalable solutions, resource optimization, and resiliency. With Okta's commitment to being 'Always On!', there is never a dull moment. Our greatest asset is our enthusiastic team of engineers and technically skilled managers.Your ResponsibilitiesLead a distributed team by setting clear expectations, removing obstacles, fostering collaboration, managing recruitment, and providing coaching and career development discussions.Collaborate with cross-functional teams including managers, architects, product owners, project managers, and security engineers to implement best practices for resilience.Effectively communicate and coordinate cross-team projects that have a significant business impact.Contribute to defining the team's strategic direction and roadmap.Develop backend frameworks and tools for organization-wide scalability.Engage in incident root cause analysis to foster continuous improvement in reliability and scaling.Provide technical mentorship to team engineers.Drive the evaluation, development, and deployment of new services.