Software Engineer Specializing in Kernel Performance & AI Tooling

Join Us as an Engineering Manager - AI Tools (Security)At Airwallex, we are redefining the landscape of global finance. Our advanced payments and financial platform serves over 200,000 businesses worldwide, including industry leaders such as Brex, Rippling, Navan, Qantas, and SHEIN. With our proprietary technology, we provide integrated solutions that encompass everything from business accounts and payments to treasury management and embedded finance.Founded in Melbourne and backed by esteemed investors like T. Rowe Price, Visa, and Mastercard, we have grown to a team of over 2,000 innovative minds across 26 global offices. Valued at an impressive US$8 billion, we are on a mission to build the future of financial services. If you’re ready to take on ambitious challenges and make a real impact, we want you on our team!

Founded in 2007, Airbnb started with two hosts welcoming three guests into their San Francisco home and has since expanded to over 5 million hosts, providing unique stays and experiences for more than 2 billion guests worldwide. Our platform fosters authentic connections between guests and local communities around the globe.Join Our Community: The UI Foundation team at Airbnb boasts a rich history, overseeing our design system, accessibility, motion design, and the essential tooling that links our design processes to product development. Within this framework, the UI Tooling team acts as the crucial bridge between our Design Language System and the daily workflows of hundreds of designers and engineers throughout the organization.UI Tooling is responsible for the platforms, integrations, and tools that facilitate collaboration and efficiency among designers and engineers. This encompasses design tooling, UI engineering workflows, and increasingly, AI-enhanced processes. As we accelerate AI enablement, this team plays a pivotal role in some of Airbnb's most strategic infrastructure initiatives.Your Impact: As the Engineering Manager for UI Tooling, you will provide essential leadership to ensure the team operates with consistency, clarity, and a long-term strategic vision. You will manage and nurture a team of engineers, oversee a multi-year roadmap across UI Tooling's core focus areas, and collaborate cross-functionally with Design, Product, and AI teams to advance the next generation of design and engineering support at Airbnb.This role is critical in facilitating UI Foundation's broader goals. With your leadership, the team will gain the focus and stability required to swiftly implement initiatives that will influence every product team at Airbnb.You will be responsible for strategy and execution across five key domains:AI Utilization of the Design System: Integrating Figma Code Connections, UI Development Skills and Agents, Prototyping Skills and Agents, and Design Skills and Agents.Core UI Development Workflow & Tooling: Component development and documentation tools, design-to-code platforms, and migration tools.Core Design Workflow & Tooling: Design systems, asset management, and collaboration tools.AI-Powered Workflows: Enhancing existing tools with AI capabilities.Cross-Functional Collaboration: Working closely with Design and Product teams to ensure seamless integration of tools and processes.

About Cogent SecurityCogent Security is at the forefront of innovation in cybersecurity, operating as an Applied AI Lab dedicated to developing next-generation AI agents. In an era where cyber threats evolve rapidly, our "AI Taskforce" analyzes vast amounts of enterprise data to proactively address vulnerabilities and prevent significant breaches.Blending cutting-edge research with practical implementation, our team works diligently to transform theoretical concepts into actionable security solutions. Our applied AI lab, Cogent Research, provides essential research capabilities that enable the realization of autonomous security workflows.Since our emergence from stealth mode, Cogent has seen impressive growth, collaborating with Fortune 500 companies to enhance security in some of the world’s most complex environments.Supported by Greylock, we have assembled a team of top-tier talent from influential universities and leading companies in the tech and cybersecurity sectors.

At Stuut AI, we are revolutionizing accounts receivable for B2B companies, enhancing collections to be smarter and more efficient. Our platform is increasingly being adopted by finance teams in various sectors, including industrials, chemicals, and manufacturing, with clients ranging from Fortune 10 enterprises to growing midmarket firms. Our innovative approach is supported by esteemed investors such as Andreessen Horowitz, Khosla Ventures, Activant, 1984 Ventures, and Page One.Position OverviewWe are seeking a dedicated Technical Staff Member focused on Internal AI Tooling. This pivotal role will involve constructing the foundational systems that allow Stuut to scale effectively. Your primary responsibility will be to design and implement internal infrastructures, automation, and AI-driven workflows to enhance operational efficiency across various departments, starting with marketing and extending to sales, operations, and product development.This is a significant role for a proactive individual who thrives on transforming manual or disjointed processes into scalable systems. Collaboration with leadership and cross-functional teams will be essential as you design AI agents, automation pipelines, and internal tools that streamline operations and unlock new capabilities.We are transitioning to an agent-first model, not only in our products but also in our operational approach. This role is central to that evolution.

At Thinking Machines Lab, our mission is to enhance human potential through the advancement of collaborative general intelligence. We aspire to create a future where everyone can harness the knowledge and tools necessary to utilize AI for their unique objectives.We are a diverse team of scientists, engineers, and builders, responsible for developing some of the most utilized AI products, including ChatGPT and Character.ai, alongside open-weight models like Mistral. Our contributions extend to popular open-source projects such as PyTorch, OpenAI Gym, Fairseq, and Segment Anything.About the RoleWe are in search of a Developer Productivity Engineer who will play a pivotal role in transforming our software development process to be safer, faster, and more enjoyable. Your primary focus will be on AI tools and coding agents, collaborating closely with platform, security, and product engineers to craft state-of-the-art tools for AI-assisted software development, significantly speeding up our internal processes.This role encompasses establishing company-wide platforms and working directly with developers to enhance their individual workflows.Note: This is an evergreen role that remains open for ongoing interest. While we receive numerous applications, there may not always be an immediate match for your skills and experience. We encourage you to apply as we continuously review submissions and reach out as new opportunities arise. You are welcome to reapply after gaining more experience, but please refrain from applying more than once every six months. Occasionally, we post specific roles for targeted projects or teams; in those cases, feel free to apply directly alongside this evergreen listing.What You’ll DoEmpower researchers and engineers to leverage AI for improved coding productivity while maintaining high code quality.Standardize AI coding tools such as Claude Code, Cursor, and Codex, helping to configure, secure, and maintain these tools while balancing organization-wide settings with individual developer preferences.Create secure, reproducible agent sandboxes for remote development and continuous integration testing.Establish golden-path development environments and safeguard measures for sensitive information.Assist individual contributors in crafting their personalized AI-enabled workflows.Monitor tool usage, reliability, and cost.

Join our dynamic team at Sentry as a Staff Software Engineer specializing in AI Developer Tooling. In this pivotal role, you will contribute to the development and enhancement of cutting-edge AI tools that empower developers worldwide. Collaborate with cross-functional teams to identify challenges and deliver innovative solutions that optimize the software development lifecycle.

About the TeamAt OpenAI, our Hardware organization is at the forefront of developing silicon and system-level solutions tailored specifically for the demanding requirements of advanced AI workloads. Our team is dedicated to pioneering the next generation of AI-native silicon, collaborating intimately with software and research partners to design hardware that is tightly integrated with AI models. Beyond delivering high-quality silicon for OpenAI's supercomputing infrastructure, we innovate by creating custom design tools and methodologies that propel hardware solutions optimized for AI.About the RoleIn this pivotal role, you will enhance the tooling ecosystem that hardware engineers depend on daily, encompassing hardware compilers, IR transformations, simulation, debugging, and automation infrastructure. Your contributions will bridge software engineering, compiler concepts, and practical hardware workflows, significantly influencing the speed and efficiency of designing next-generation AI systems. Collaborating closely with architects, RTL designers, and verification engineers, you will translate real engineering challenges into sustainable, scalable tooling solutions.Key ResponsibilitiesDevelop and enhance software tools to increase the efficiency of hardware teams: compilation, IR transformations, RTL generation, simulation, debugging, and automation.Extend and integrate hardware compiler stacks (including frontends, IR passes, lowering, scheduling, and code generation to Verilog/SystemVerilog) and connect these with actual design workflows.Enhance developer experience and system reliability: focus on reproducible builds, improved error messaging, quicker iteration cycles, and robust CI and regression infrastructures.Collaborate with designers and verification engineers to transform identified pain points into effective solutions.Engage with RTL as required: analyze and interpret Verilog/SystemVerilog to troubleshoot issues, validate tool outputs, and enhance debuggability.Be prepared to delve deeply into the stack when necessary, including gate-level perspectives, synthesis outcomes, and implementation artifacts.Support PPA optimization efforts by creating analysis and automation around area, timing, and power trade-offs, while improving tools that influence these aspects.Ideal Candidate ProfileProven experience in developing and maintaining software (through projects, internships, research, open-source contributions, or similar).

About UsXOXO AI is an innovative research laboratory dedicated to shaping the future of intelligence for everyday life. Our dynamic team of skilled engineers, designers, and researchers is committed to discovering transformative solutions for challenges that extend beyond the workplace.Following a significant breakthrough in infrastructure, architecture, and model layers, we are on the lookout for dedicated builders to develop the interface and application layer that will actualize our visionary goals.About the RoleWe are seeking a seasoned Security Engineer to safeguard our systems and uphold user trust. Your role will involve fortifying our cloud infrastructure, enforcing access restrictions, and establishing tools and response mechanisms that ensure security as we scale. Collaborating with the founders and our engineering team, you will embed security as a fundamental principle in our development processes.What You’ll DoCollaborate with engineering, product, and research teams to integrate security throughout the development lifecycle, including threat modeling, design reviews, and secure defaults.Strengthen cloud infrastructure and enforce network topology standards such as subnets, firewalls, routing, and organizational security policies.Implement isolation and segmentation strategies to limit potential damage and prevent lateral movement.Develop and maintain security tools and automation for engineers, including CI/CD checks, scanning, and guardrails, driving findings to remediation.Enhance observability, detection, and incident response for security-related events such as intrusions, abuse patterns, DDoS attacks, and bots, ensuring rapid containment.Design and manage identity and access management systems for both users and services, alongside third-party integration controls, prioritizing private connectivity and the principle of least privilege.

At Harmonic Security, we empower teams to safely integrate AI tools by ensuring real-time protection of sensitive data with minimal effort. Our solutions provide enterprises with complete control over their data, preventing leaks and fostering a culture of confident innovation.Our leadership is comprised of seasoned cybersecurity professionals, supported by top-tier investors such as N47, Ten Eleven Ventures, and In-Q-Tel.Our Work Philosophy: AI at the CoreHarmonic's mission is to facilitate the safe and scalable adoption of AI by enterprises. We hold ourselves to this standard, with every team member actively utilizing AI tools to enhance their work, from research and writing to process building and workflow automation. We welcome new hires who bring a curiosity about AI and a readiness to harness its potential to work smarter, faster, and more creatively. Whether it's through experimentation with new tools or the development of entirely new systems centered around AI, we are committed to providing clarity and support for each role.Team OverviewIn this role, you will report directly to the VP of GTM Strategy and Operations, collaborating closely with sales leadership, customer success, tech operations, and finance teams. This cross-functional position places you at the nexus of revenue operations and systems engineering, where you will construct clean, automated, and scalable infrastructures pivotal for our representatives, leaders, and board. Your responsibilities will go beyond mere tool configuration; you will be tasked with architecting, integrating, and coding to ensure a seamless operational flow.Role ResponsibilitiesThis position is designed for an innovative builder who is not interested in maintaining existing systems, but rather identifying and resolving inefficiencies within the go-to-market (GTM) processes through AI and automation.You will take ownership of designing and developing systems, automations, and internal tools that enhance the effectiveness of our GTM teams. This encompasses everything from HubSpot architecture and lead routing to the creation of AI-driven agents for research, data enrichment, and meeting preparation. If your instinct is to leverage AI tools like Claude or Clay rather than defaulting to spreadsheets for manual processes, you will excel in this environment.As Harmonic scales its GTM operations, the systems you implement will play a crucial role in shaping our operational landscape for years to come.

About Cogent SecurityCogent Security is at the forefront of cybersecurity innovation, leveraging Applied AI to develop next-generation AI agents. In an era where cyber attacks evolve rapidly, our AI Taskforce analyzes vast amounts of enterprise data to proactively address vulnerabilities and prevent critical breaches.We combine pioneering research with practical execution, ensuring that our innovative solutions meet real-world challenges. Our Cogent Research division acts as our dedicated AI lab, driving the development of advanced security workflows.Since our emergence from stealth mode, we have rapidly grown, collaborating with Fortune 500 companies to secure complex production environments globally.Supported by Greylock, we have gathered a team of top talent from renowned institutions and leading organizations in the AI and cybersecurity sectors.About the RoleAs an Agent Engineer at Cogent Security, you will be pivotal in designing, building, and deploying critical AI agents tailored for complex client environments. Your role is highly cross-functional, involving direct collaboration with customers to understand their unique needs, adapting our platform accordingly, and iterating on scalable solutions to handle millions of real-world security events.You will manage projects from inception to deployment, including data onboarding and integrating feedback into our core agent platform. Your contributions will shape how AI agents detect threats, triage incidents, and automate security workflows for some of the most sophisticated organizations worldwide.This position is ideal for engineers who excel in dynamic environments, enjoy tackling complex technical challenges, and wish to see the tangible impact of their work.

Join Airwallex as a Senior Software Engineer - AI ToolsAre you ready to make a significant impact in the world of global finance? At Airwallex, we are the leading unified payments and financial platform for businesses around the globe. Our innovative solutions empower over 200,000 businesses, including industry giants like Brex, Qantas, and SHEIN, to seamlessly manage everything from accounts to treasury operations.Founded in Melbourne and now boasting a team of over 2,000 talented individuals across 26 offices worldwide, we are valued at $8 billion and supported by top-tier investors such as T. Rowe Price and Visa. If you're eager to take on challenging projects and grow your career, we want you on our team.What We ValueWe seek dynamic builders with a passion for innovation and a desire to take ownership of their work. You should bring a wealth of expertise and a sharp, analytical mindset, driven by our mission and operating principles. Your ability to make quick yet sound decisions while exploring new avenues will be paramount.As a collaborative team player, you will turn groundbreaking ideas into tangible products and drive our projects to completion. Leveraging AI will be key to working efficiently and solving problems swiftly. Join us in addressing complex challenges with exceptional colleagues while advancing your career in the future of global banking.Your RoleAs a Senior Software Engineer focusing on AI tools, your mission will be to maintain the security of over $150 billion in payments across 150,000 companies and thousands of employees.You will collaborate with internal teams to identify impactful projects, such as developing automation tools, managing our extensive log pipelines, and employing AI to enhance team operations. We value versatility and intelligent problem-solving over specific technologies, so you'll have the freedom to choose the best approaches. Additionally, you'll play a crucial role in mentoring junior engineers and contributing to the growth of our exceptional engineering team.

At ClickUp, we are not just creating software, we are crafting the future of work! In a landscape saturated with work complexities, we envisioned a better solution. This vision led to the development of the first genuinely integrated AI workspace, seamlessly combining tasks, documents, chat, calendar, and enterprise search, all enhanced by context-sensitive AI. This empowers millions of teams to break down barriers, reclaim their time, and elevate productivity to new heights. Here at ClickUp, you will have the chance to learn, leverage, and innovate with AI in ways that will not only transform our product but also redefine the future of work itself. Join us in being part of a daring, innovative team that is reshaping possibilities! Role Overview:We are in search of a highly talented and experienced Staff AI Engineer – AI Platform to become a vital member of our ClickUp Engineering team. In this pivotal role, you will significantly contribute to the development of our core AI platform and directly utilize large language models (LLMs) to implement intelligent features across ClickUp. Your focus will be on back-end systems that facilitate scalable, dependable, and secure AI-driven capabilities, while also engaging hands-on with LLMs to address real user challenges and propel product innovation.Key Responsibilities:Design, architect, and implement scalable AI platform services to support the deployment, orchestration, and lifecycle management of LLMs and other AI models.Utilize LLMs and other AI technologies to build and enhance ClickUp’s intelligent features, collaborating closely with product and engineering teams to deliver impactful solutions.Develop and maintain robust APIs and backend systems that facilitate seamless integration of AI-enhanced features into ClickUp’s core platform.Create infrastructure for model serving, monitoring, logging, and automated evaluation to ensure high reliability and performance of AI services in production.Integrate with various LLM providers (e.g., OpenAI, Anthropic, Google) and manage model selection, routing, and fallback strategies for optimal performance and cost-efficiency.Promote best practices in AI privacy, security, and compliance, including data anonymization and secure data handling.Optimize platform performance, scalability, and cost-efficiency, utilizing cloud-native technologies and distributed systems.Stay abreast of advancements in AI infrastructure, MLOps, and LLM applications, and proactively apply relevant innovations to ClickUp’s AI platform.Collaborate cross-functionally with teams to drive AI initiatives.

About Cogent SecurityCogent Security is pioneering the future of cybersecurity through Applied AI, creating advanced AI agents designed to combat rapidly evolving cyber threats. Our AI Taskforce analyzes vast datasets to neutralize potential breaches before they impact our clients.Our commitment to innovation combines cutting-edge research with practical application, ensuring our solutions are at the forefront of technology. In addition to our product development, Cogent Research acts as our applied AI laboratory, supplying the expertise required to create highly effective security workflows.Since our launch from stealth mode, Cogent has seen remarkable growth, collaborating with Fortune 500 companies to secure some of the most intricate production environments globally.Backed by Greylock, our team consists of exceptional talents from leading universities such as Stanford, Berkeley, and Carnegie Mellon, as well as high-growth companies like Scale AI and Tesla, and cybersecurity experts from stalwarts like Wiz and DeepMind.

Join Lightning AI as a Senior Application Security Engineer specializing in the realms of Artificial Intelligence and Machine Learning. In this pivotal role, you'll be responsible for enhancing our application security posture across our innovative platforms. Collaborate with a team of talented engineers to identify vulnerabilities, implement security best practices, and ensure our AI-driven solutions remain robust and secure.

Join Scale AI as a highly skilled Security Engineer in our Product Security team, where you will play a pivotal role in safeguarding the security and integrity of our products and services. This position involves conducting comprehensive code reviews, implementing security best practices, and shaping our overarching security strategy. Your proficiency in TypeScript, Python, AWS, CI/CD, SAST, DAST, and Terraform orchestration will be vital in detecting and addressing potential security threats. You will have the opportunity to analyze complex issues, identify root causes independently, and articulate the complexities and implications of security vulnerabilities, including their potential for exploitation and impact. Your responsibilities will include:Utilizing extensive product security knowledge to design and maintain software tools that secure every layer of the modern AI/ML software ecosystem.Conducting thorough code reviews to identify and rectify security vulnerabilities.Assessing and improving the security of our product offerings through RFC and service evaluations.Establishing and sustaining CI/CD pipelines with a strong emphasis on security.Executing Static Application Security Testing (SAST) and Dynamic Application Security Testing (DAST) to uncover vulnerabilities in production code.Employing Terraform orchestration to maintain secure and efficient infrastructure management.Advising engineering teams on developing robust, long-term solutions that prioritize security and privacy.Clearly communicating the mechanics and significance of security vulnerabilities, including their exploitability and potential consequences.Contributing to the security strategy and direction of the team, advocating for best practices and ongoing enhancements. Ideal candidates will possess:A proven track record of independently driving multi-month security initiatives, from problem identification to execution, with minimal oversight.Significant experience as a Security Engineer with an emphasis on product security.Proficiency in NodeJS, TypeScript, Python, and/or Kubernetes.A strong grasp of modern JavaScript application design.Practical experience in operating and securing AWS infrastructure at scale.Hands-on experience with SAST and DAST tools and methodologies.Familiarity with Terraform orchestration for managing infrastructure.Capability to analyze complex problems and identify root causes independently, providing actionable insights without managerial input.Exceptional communication skills, enabling clear presentation of technical concepts to diverse audiences.

About Cogent SecurityCogent Security is an innovative Applied AI Lab pioneering the future of AI agents in the realm of cybersecurity. In a world where cyber threats evolve at unprecedented speeds, our 'AI Taskforce' analyzes vast amounts of enterprise data to proactively address vulnerabilities and avert critical breaches.We remain at the forefront of technology by merging cutting-edge research with practical applications. Our dedicated Cogent Research team fuels our mission, ensuring we develop truly effective security workflows powered by AI.Since our inception, Cogent has rapidly grown, collaborating with Fortune 500 companies to safeguard the most intricate production environments globally.Supported by Greylock, our team comprises some of the brightest minds in applied AI, including experts from:Renowned universities such as Stanford, Berkeley, Penn, Duke, Carnegie Mellon, and Waterloo.High-growth unicorn companies like Scale AI, Databricks, Stripe, Tesla, and Coinbase.Leading cybersecurity specialists from Wiz, Abnormal AI, and Zscaler.Prestigious research institutions including DeepMind and SAIL.About the RoleAs we embark on building a suite of backend services and integrations with our design partners, we seek passionate and skilled Backend Engineers at both Senior and Staff levels, eager to thrive in the Applied AI domain.ResponsibilitiesDesign and implement critical backend subsystems and integration platformsComprehend business objectives and customer requirements to engineer backend subsystems that align with our technology strategies.Adapt systems to meet evolving needs of design partners and clients.Incorporate non-functional requirements such as compliance and security into system design.Establish scalable infrastructure foundationsPrepare for future growth in customer base, headcount, and data management by collaborating with your team to enhance infrastructure.

Join Hive as a Cybersecurity Engineer and play a pivotal role in fortifying our security infrastructure. We are seeking a proactive and skilled individual with a strong background in information security. In this role, you will be responsible for safeguarding sensitive company data, managing potential security incidents, and implementing robust security and data governance measures. You will collaborate across various teams to lead security operations, conduct risk assessments, respond to incidents, and maintain security projects. Our ideal candidate is passionate about AI and committed to enhancing our security framework to meet evolving challenges.

Our mission: to eliminate every barrier to mental health.At Spring Health, we are dedicated to transforming mental healthcare by dismantling every obstacle that hinders individuals from receiving timely assistance. Our clinically validated technology, Precision Mental Healthcare, enables us to provide personalized care—whether it’s therapy, coaching, medication, or more—tailored to meet the unique needs of each individual.We proudly collaborate with over 450 companies, ranging from innovative startups to established Fortune 500 giants, as a premier provider of mental health services, positively impacting the lives of 10 million individuals. Our esteemed clients include well-known brands like Microsoft, Target, and Delta Airlines, who rely on us to deliver exceptional outcomes for their global workforce. Through our groundbreaking platform, we have achieved a net positive ROI for employers and are the sole entity in our sector to receive external validation for net savings provided to clients.We have garnered investment from renowned investors including Generation Investment, Kinnevik, Tiger Global, Northzone, and RRE Ventures, among others. Thanks to their support and our recent Series E funding, our valuation has now reached $3.3 billion. We’re just getting started—be a part of our mission to make mental healthcare accessible to everyone, everywhere.We are currently on the lookout for a Staff AI Security Engineer to join our dynamic team. Reporting directly to the Chief Information Security Officer (CISO), you will play a pivotal role in shaping and advancing our AI security strategy to safeguard highly sensitive mental health data across both our product and corporate environments.Please note that this is a full-time hybrid position based in San Francisco, with an expectation of being in the office 2-3 days a week. Our office is conveniently located at 2 Embarcadero Ctr.

About Our TeamAt OpenAI, security is a core pillar of our commitment to ensuring that artificial general intelligence is beneficial to all of humanity. Our Security team plays a crucial role in safeguarding OpenAI’s technology, personnel, and products. We focus on creating effective technical solutions while maintaining operational excellence. Our guiding principles include prioritizing impactful actions, empowering researchers, preparing for transformative technologies, and fostering a robust security culture.About the RoleAs a Security Engineer specializing in Application Security, you will be at the forefront of identifying and addressing security vulnerabilities within our software applications. Your expertise will be applied through building innovative security tools, conducting code reviews, performing penetration testing, and executing thorough security assessments.We are seeking proactive individuals who can collaborate closely with development teams to ensure the integration of secure coding practices throughout the software development lifecycle. Your role will also encompass providing security guidance to developers and stakeholders, thereby enhancing the overall security awareness across the organization.This position is ideally based in San Francisco, Seattle, or New York City, but remote work options will be considered. Our hybrid work model includes three days in-office each week, along with relocation assistance available for new hires.Key Responsibilities:Conduct Security Assessments: Regularly perform security assessments, code reviews, and penetration tests to uncover vulnerabilities in applications.Develop Security Tools: Design and implement security tools, frameworks, and methodologies to shield applications from potential threats.Collaborate with Development Teams: Partner with development teams to ensure best security practices are embedded in the software development lifecycle, including secure coding standards.Threat Modeling and Risk Management: Engage in threat modeling and risk assessments to identify potential risks early and formulate effective mitigation strategies.Manage Vulnerabilities: Track, analyze, and oversee vulnerabilities in applications, providing guidance and support for remediation efforts.Incident Response: Participate in incident response efforts as necessary, ensuring swift action is taken to mitigate security incidents.