Principal Senior Machine Learning Scientist Jobs

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. WHY SAFETY? At Roblox, we strive to connect a billion people with optimism and civility, and the Safety organization’s mission is to become the leader in civil immersive online communities. We systematically detect, remove, and prevent problematic accounts, content and behavior, and we make Roblox accounts secure and free from compromise. We cover a broad area of the tech spectrum, including machine learning, classifiers for 3D models, experimentation, automation, detection workflows, and AI-powered text filters. Aligned and partnering with product teams, we use this toolbelt to discover new opportunities, influence and shape the product roadmap and prioritization, build safety products, and measure the impact on our community of users and developers. In doing so, we keep Roblox safe, civil, and inclusive, and we foster positive relationships between people around the world. WHY ALT DEFENSE? Safety and Civility is Roblox’s #1 priority. The Alt Defense pod is at the front lines of this mission, tasked with solving one of the most difficult adversarial problems on the platform: Alternate Account Detection and Prevention. When bad actors are removed from Roblox, they often attempt to return im

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Available Locations- New York, London About Us At Cloudflare, we have our eyes set on an ambitious goal: to help build a better Internet. Today the company runs one of the world’s largest networks that powers trillions of requests per month. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare have all web traffic routed thr

Here at Appian, our values of Intensity and Excellence define who we are. We set high standards and live up to them, ensuring that everything we do is done with care and quality. We approach every challenge with ambition and commitment, holding ourselves and each other accountable to achieve the best results. When you join Appian, you’ll be part of a passionate team dedicated to accomplishing hard things, together. Bring your passion for enterprise technology and strategic leadership to a team dedicated to accomplishing hard things. Shape the future of corporate modernization. Location: Mexico City, MX | Work Model: Hybrid About the Team Appian Customer Success is obsessed with delivering exceptional customer outcomes and driving mission-critical business impact. Grounded in our core values of Respect, Work to Impact, Ambition, and Constructive Dissent & Resolution, we act as elite technical advisors to our commercial clients. By joining this high-performance team, you will champion a culture of candid communication and excellence while accelerating global adoption of our AI-Powered Process Automation platform. The Opportunity As a Principal Technical Consultant, you will occupy a premier leadership position at the intersection of enterprise business strategy and complex technical delivery. This role is vital right now because you won’t just execute projects—you will define how they are delivered. You will partner directly with Appian Architects and Technical Delivery Managers, lead large-scale consulting initiatives, and serve as a vital mentor to the next generation of engineers, ensuring our clients achieve world-class Enterprise-Grade Orchestration . What You’ll Do Lead Enterprise Delivery: Command the entire software development lifecycle ( SDLC ) to define, design, and implement custom automation solutions using the Appian platform for major commercial clients. Direct High-Performing Teams: Lead and mentor consultants through fast-paced software imp

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Principal Product Specialist – Browser Security to join our team. This is a Hybrid (Bangalore) role, reporting to the Director, Threat Researcher in the Engineering department. Zscaler is seeking a hands-on technical specialist to drive customer adoption and secure enterprise sales wins. In this technical, customer-facing role, you will collaborate with Sales, Product, and Engineering to lead product walkthroughs, technical workshops, proof-of-value engagements, deployments, and live troubleshooting. You will translate browser security capabilities into clear business outcomes for CISOs, security leaders, and architects. What you’ll do (Role Expectations) Serve as Zscaler’s Browser Security technical specialist, leading customer discovery, demos, solution deep dives, and architecture discussions Own or support POCs / POVs, including success criteria definition, test planning, execution

About Us At Cloudflare, we are on a mission to help build a better Internet. Today the company runs one of the world’s largest networks that powers millions of websites and other Internet properties for customers ranging from individual bloggers to SMBs to Fortune 500 companies. Cloudflare protects and accelerates any Internet application online without adding hardware, installing software, or changing a line of code. Internet properties powered by Cloudflare all have web traffic routed through its intelligent global network, which gets smarter with every request. As a result, they see significant improvement in performance and a decrease in spam and other attacks. Cloudflare was named to Entrepreneur Magazine’s Top Company Cultures list and ranked among the World’s Most Innovative Companies by Fast Company. At Cloudflare, we’re not looking for people who wait for a polished roadmap; we’re looking for the builders who see the cracks in the Internet that everyone else has simply learned to live with. We value candidates who have the instinct to spot a "normalized" problem and the AI-native curiosity to create a solution using the latest tools. Our culture is built on iteration, leveraging AI to ship faster today to make it better tomorrow, while ensuring that every improvement, no matter how small, is shared across the team to lift everyone up. If you’re the type of person who values curiosity over bureaucracy, and that AI is a partner in solving tough problems to keep the Internet moving forward, you’ll fit right in. Location: Singapore About Developer GTM The Developer GTM organization is a highly collaborative startup within Cloudflare, dedicated to attracting, inspiring, and growing the next generation of builders. We are redefining developer acquisition in a world where AI and distributed agents are reshaping the stack. Our mission is to create accessible and exciting pathways for developers to discover Cloudflare—whether through ecosystem partnerships, high-imp

Our vision is to transform how the world uses information to enrich life for all . Micron Technology is a world leader in innovating memory and storage solutions that accelerate the transformation of information into intelligence, inspiring the world to learn, communicate and advance faster than ever. Job Description As an SSD Firmware Validation Engineer at Micron Technology, Inc., your responsibilities will include: Define Test Plan/Design, test cases and develop Test Scripts to validate Firmware for Enterprise and Datacenter class NVMe SSD products. As part of Firmware Test Engineering team, you would demonstrate high degree of skills to understand one or more areas of FW: Front End, Back end/Media management, FTL or Security. You would also exhibit high degree of competency in understanding NVMe/PCIe specifications, NVMe Cloud SSD Specifications, along with understanding Customer specific requirements. You will be working in partnership with Firmware development teams through the lifecycle of the product while finding defects and validating the fixes by create grey and Whitebox tests. Be able to demonstrate success in communicating status, issues, concerns, strategies of programs and projects - including development of appropriate indicators. Must be able to deal with ambiguity and operate with little direction to meet defined goals. Must be able to collaborate with others to achieve goals and task completion. Comprehend and articulate validation strategies, plans and status. Review, track and document test results and sightings Drive issues to closure by interfacing/collaborating with other product development team. Experience : Bachelor’s or Master’s degree in Computer Science or Engineering with 10+ years of experience in SSD Firmware Validation. Pro

Our vision is to transform how the world uses information to enrich life for all . Micron Technology is a world leader in innovating memory and storage solutions that accelerate the transformation of information into intelligence, inspiring the world to learn, communicate and advance faster than ever. Micron’s Heterogeneous Integration Group (HIG) is shaping the future of AI and accelerated computing by developing advanced memory solutions! The team focuses on designing and optimizing High Bandwidth Memory (HBM) products for AI/ML, high-performance computing (HPC), and data-centric systems, collaborating across global engineering and product teams to deliver industry-leading performance, power efficiency, and reliability! As a Principal HBM Design Engineer , you will lead cross-functional efforts to drive silicon debug, product quality, and system-level stability for high-volume HBM products . You will own the resolution of complex silicon and system issues, influence design and architectural decisions, and ensure successful deployment across key customer platforms. You will operate at the intersection of design, silicon, and system behavior , providing technical leadership across the full product lifecycle and driving continuous improvement into future HBM generations. Responsibilities Design Ownership: Work on HBM product design and own design health through sustaining phase, driving ECO implementation, verification, and long-term maintainability. Technical Leadership: Define debug strategies, guide cross-functional teams, and serve as a technical authority in HBM sustaining efforts. Silicon & System Debug: Lead root-cause analysis and resolution of complex silicon, system, and customer issues, driving closure across multiple doma

Our vision is to transform how the world uses information to enrich life for all . Micron Technology is a world leader in innovating memory and storage solutions that accelerate the transformation of information into intelligence, inspiring the world to learn, communicate and advance faster than ever. Job Title: Principal Engineer – HBM Verification Location: Hyderabad, India Experience : 12+ years in Design Verification (experience with Pre-Silicon Verification OR DDR/GDDR/LPDDRmemory/SerDes PHY IP Verification is preferred) Role Description Join the Micron HBM team where you will drive verification architecture for next-generation HBM, ensuring robust methodologies and sign-off strategies. This role is perfect for a hands-on silicon verification expert who is passionate about developing best-in-class verification methodologies, testbench design, AI enabled verification and developing novel solutions to improve quality and efficiency of verification workflows. Key Responsibilities Define and drive verification architecture and methodology for next generation HBM designs. Develop verification plans, coverage strategies, and sign-off criteria. Architect and implement UVM-based testbenches and reusable verification components. Apply Formal Verification techniques for critical Collaborate strictly with build teams to ensure verification completeness and quality. Mentor a

Our vision is to transform how the world uses information to enrich life for all . Micron Technology is a world leader in innovating memory and storage solutions that accelerate the transformation of information into intelligence, inspiring the world to learn, communicate and advance faster than ever. Job Title: Principal Engineer – HBM Verification Location: Hyderabad, India Experience : 12+ years in Design Verification (experience with Pre-Silicon Verification OR DDR/GDDR/LPDDRmemory/SerDes PHY IP Verification is preferred) Role Description Join the Micron HBM team where you will drive verification architecture for next-generation HBM, ensuring robust methodologies and sign-off strategies. This role is perfect for a hands-on silicon verification expert who is passionate about developing best-in-class verification methodologies, testbench design, AI enabled verification and developing novel solutions to improve quality and efficiency of verification workflows. Key Responsibilities Define and drive verification architecture and methodology for next generation HBM designs. Develop verification plans, coverage strategies, and sign-off criteria. Architect and implement UVM-based testbenches and reusable verification components. Apply Formal Verification techniques for critical Collaborate strictly with build teams to ensure verification completeness and quality. Mentor a

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Principal Sales Engineer to join our Public Sector team. This is a remote role in the East Coast, reporting to the Sales Engineering Manager in the Federal department. As a key technical driver in our Federal organization, you will partner directly with Federal Civilian entities to architect solutions, demonstrate value, and guide their Zero Trust transformation. What you’ll do (Role Expectations) Present and demonstrate the Zscaler platform to prospects, customers, and partners to articulate value and drive technical alignment Oversee the technical sales process end to end to accelerate deals and ensure technical success Run Proof of Value engagements from start to finish to validate outcomes and secure technical buy-in Collaborate across internal Zscaler teams to ensure seamless execution and customer success Act as a trusted advisor, translating customer desired outcomes into technical recommend

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role We are looking for a Principal Technical Writer to lead the strategy and execution of our customer onboarding and 'Getting Started' content. Your mission is to transform our onboarding materials into a cohesive, narrative-driven experience that guides users to their first 'aha!' moment. You will partner closely with the Self-Service (SSC) team, acting as a bridge between the field, product, and documentation to ensure our content is not just accurate , but effective at guiding trial-to-paid conversion. In this role, you will define the narrative architecture of our user journey, ensuring that every touchpoint, from first-time setup to advanced feature adoption, feels like a seamless, intentional story. You'll be the champion of the new-user experience, working in lockstep with others to turn technical capability into user success. What You Will Be Doing Drive the onboarding content strategy. Define and execute a cohesive narrative for how users learn to use our products, ensuring a seamless story from the first visit to successful deployment. Align Field, Product, and Docs. Act as a central point of contact for stakeholders. Work with Product teams to understand roadmap changes, Field teams to identify friction points in real-world deployments, and Documentation teams to ensure high-quality content output. Design user-focused flo

The Personalization team makes deciding what to play next easier and more enjoyable for every listener. From Blend to Discover Weekly, we’re behind some of Spotify’s most-loved features. We built them by understanding the world of music and podcasts better than anyone else. Join us and you’ll keep millions of users listening by making great recommendations to each and every one of them. Spotify Search handles billions of queries across every market, language, and content type — music, podcasts, audiobooks, videos, playlists, and more. We’re looking for a Principal Product Manager to lead the Search Personalization within our Conversation Product Area, setting the product strategy for how hundreds of millions of users find and discover content on Spotify. This is a leadership role at the intersection of search systems, AI, and user experience. You’ll own the end-to-end strategy for search results — from ranking and relevance to AI-powered features like semantic search, LLM reranking, and AI Overviews — while leading two key Search squads (results ranking and query suggestions). Search is the front door to Spotify; this role shapes what people find when they walk through it. What You'll Do Set the product strategy and multi-cycle roadmap for Search Personalization at Spotify — spanning ranking, relevance, retrieval, AI-native features, quality, and trust. Drive the evolution of Search toward AI-native experiences — AI Overviews, semantic search, LLM reranking — balancing innovation velocity with quality and cost discipline. Own the Search quality bar: define how relevance, trust, compliance, and user experience connect into a holistic quality framework with measurable outcomes. Manage Search’s role as a shared surface across many company strategies — build prioritization frameworks, communicate trade-offs, and represent Search at executive forums. Influence and coach junior PMs working in Search. Partner with engineer

Location(s): Canada (Remote - East Coast preferred) Bready * to make a change? Toast creates technology to help restaurants and local businesses succeed in a digital world, helping business owners operate, increase sales, engage customers, and keep employees happy. Toast is driven to build a platform that helps our customers adapt, take control, and get back to what they do best: building the businesses they love. International expansion is a critical growth engine for Toast's future. Outside the US, we currently operate in Canada, UK, Ireland, and Australia and are actively growing our market share. Integration partnerships are a key part of our strategy to ensure that restaurants of all sizes can retain the parts of their tech stack outside of the Toast platform. This role is for a current vacancy. Who We Are Supporting customers software partners is a key part of international expansion strategy, and the advent of AI powered coding tools provided the opportunity to significantly reduce the development effort required to integrate with a partner. We are looking for a principal engineer to lead the development of this new way of integrating partners, while also providing additional technical leadership across our International expansion efforts. This is an exciting opportunity to develop new AI powered development systems that will provide direct impact for our customers. A day in the life (Responsibilities) Leverage cutting edge AI tools to enhance your development workflow, improve velocity, and help pioneer new approaches to building - contributing to a culture of innovation and productivity across the team. Lead fellow developers, product managers, designers, and user researchers to build a strong tech infrastructure that enables scalably integration of key customer software partners. Architect, create and maintain an AI harness for the rapid integration and maintenance of partners with Toast’s systems Define and drive technical strategy for problem

Who we are At Twilio, we’re shaping the future of communications, all from the comfort of our homes. We deliver innovative solutions to hundreds of thousands of businesses and empower millions of developers worldwide to craft personalized customer experiences. Our dedication to remote-first work , and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands. . Hiring and how we work We use Artificial Intelligence (AI) to help make our hiring process efficient. That said, every hiring decision is made by real Twilions! Also, while we are a remote-first company, you may be asked to report in person on an ad-hoc basis for team gatherings, functional off-sites or customer meetings. . See yourself at Twilio Join the team as Twilio’s next Product Specialist — Trust, Identity & Compliance About the job This position is needed to architect and validate Twilio’s most complex, highest-impact, multi-product opportunities by translating Twilio’s portfolio into secure, scalable, and executive-ready architectures. You will operate as the regional technical authority for your specialty, partnering tightly with Generalist Solutions Engineers (SEs) and Account Executives (AEs) while engaging Enterprise Strategists and Value Engineers to accelerate outcomes. You’ll also serve as a key bridge between GTM and R&D—codifying repeatable architecture patterns, elevating field capability, and influencing roadmap through formal interlocks. Responsibilities In this role, you’ll: Architect and validate end-to-end, multi-product solutions that fit into customer ecosystems—often across multiple teams, regions, and lines of business. Lead technical discovery, solution map

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab. An overview of this role As a Technical Program Manager on GitLab's all-remote R&D PMO team, you will own complex, end-to-end programs that are central to our AI-powered DevSecOps strategy. You will drive high-priority initiatives across product, engineering, data, and security teams, transforming strategic vision into executable plans that deliver innovative capabilities like the GitLab Duo Agent Platform and next-generation developer tools. You will work closely with executive leaders and cross-functional stakeholders, serving as the bridge between strategy and execution through clear communication, proactive risk managemen