Staff Platform Infrastructure Engineer Jobs

Perplexity is seeking experienced ML engineers to design, build, and optimize the recommendation systems that power core experiences on Perplexity. Perplexity builds AI for those who expect more. Our products are designed to help people find answers, make their most consequential decisions, and complete increasingly ambitious work. Across these use cases, the Perplexity experience must feel deeply personal. Great recommendations and user understanding are central to delighting and delivering for each user. To do this, we are reimagining recommendation systems for the LLM era. Our goal is to combine the intelligence of frontier LLMs, the personalization context that comes from real product usage, and the continual learning capabilities of modern recommendation systems. We build systems that draw on past context and connected data sources to deeply understand each user's needs and recommend the actions that help them get the most out of Perplexity. Why Perplexity is Different Craftsmanship . We build high quality, tasteful products targeting both AI native and AI curious users. Ownership . You identify the problem, design the solution and ship it. Entrepreneurship . We think like founders, act with urgency, and hustle to deliver for each other and our users. Scholarship . Work among highly talented peers, pursuing knowledge and truth, upleveling ourselves, our teams, and our products. Partnership . We amplify each others’ strengths, break down silos, and give selflessly to help our colleagues deliver excellence. What you'll do Own the personalization and ranking behind key product surfaces to make Perplexity more useful and drive impact on core user and business metrics. Build user modeling that captures intent, preference, and propensity, and powers more relevant, more personalized experiences. Design the decision layer that balances competing objectives to produce the best overall experience for the user. Build the data and evaluation foundations that let these syst

In 2026, we launched Computer, the defining product for the new era of agentic AI. Millions of people now use Perplexity to transform knowledge into action, and the Growth team owns the product loops that help them discover, adopt, and build lasting habits around our most important AI experiences. As a growth engineer at Perplexity, you'll work across the full funnel — activation, onboarding, SEO, lifecycle, conversion, retention, and paid upgrade moments — while also building the applied AI systems that make those experiences smarter. Engineers are responsible for end-to-end projects from training and productionizing classifiers to identify high-intent users, personalizing value discovery, shipping contextual onboarding experiments, or wiring new AI capabilities into measurable adoption and revenue outcomes. Growth at Perplexity goes beyond incremental funnel optimization. The team sits close to the core product - we translate behavioral signals, model outputs, and fast experimentation into durable product surfaces used across consumer and enterprise workflows. You'll move fast, run many experiments in parallel, and own the outcome end-to-end. Tech Stack: TypeScript | Next.js | React | Python | PostgreSQL | Eppo | AWS Why Perplexity is different Craftsmanship. We build high quality, tasteful products targeting both the AI native and AI curious. Ownership. You identify the problem, design the solution and ship it. Entrepreneurship. We think like founders, act with urgency, and hustle to deliver for each other and our users. Scholarship. Work among highly talented peers, pursuing knowledge and truth, upleveling ourselves, our teams, and our products. Partnership. We amplify each others' strengths, break down silos, and give selflessly to help our colleagues deliver excellence. What you'll do Design, build, and own growth surfaces across the full funnel — activation, onboarding, SEO, lifecycle, conversion, retention, and paid upgrade moments — for Computer and every P

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! Role Overview: As a Senior Member of Technical Staff specializing in web data for pre-training, you will play a pivotal role in developing the large scale web data pipeline that underpins Cohere’s advanced language models. In this role, you will work extensively with large-scale web corpora, transforming raw, noisy internet data into high-quality training data for pretraining. You will own key components of the data pipeline, including extraction, parsing, deduplication, and filtering. You will also analyze the composition and quality of web data, study its impact on downstream model performance, and collaborate closely with the broader data and evaluation teams to iterate on the training corpus. Your work will be essential to Cohere’s mission of delivering efficient and reliable language understanding and generation capabilities, driving innovation in natural language processing. If you are passionate about transforming data into the foundation of AI systems, this role offers a unique opportunity to make a meaningful impact. Please Note: We have offices in London, Paris, Toronto, San Francisco and New York but also embrace bein

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. Interested in changing the landscape of artificial intelligence workloads? Join our team where we are building next-generation, high-performance memory solutions for AI. In Micron's AI-optimized Memory Architecture organization, we partner closely with customers to design and deliver memory solutions purpose-built for emerging AI systems and applications. As a Member of Technical Staff in the AI-optimized Architecture team, you will contribute to the microarchitecture and design of tightly coupled, high‑performance memory for AI. Apply expert knowledge to realize architecture features into silicon, with a strong focus on performance, power, area, (PPA) and reliability. This role is ideal for an engineer who combines deep digital design experience with strong architecture intuition, motivated by turning architectural intent into efficient, silicon‑proven implementations. What you'll do Translate architecture requirements into efficient, scalable microarchitectures that optimize systems metrics with ownership from concept through implementation. Design, implement, and review SystemVerilog designs for memory systems architectures. Perform synthesis and early analysis to estimate and optimize area, power, and timing, and to guide architecture and microarchitecture tradeoffs. Compose and maintain clear microarchitecture documentation that aligns design intent across teams. Drive technical decisions by evaluating tradeoffs across microarchitecture and implementation constraints. Wha

About Us: AI needs a new infrastructure layer. We're building it at Modal. Every era of computing brought new workloads that previous infrastructure couldn't support: mainframes, databases, and the cloud. Each time, the company that rebuilt the layer underneath defined the decade. AI is no different, except it touches everything instead of one slice, and the window to build the layer underneath it is open right now. Our customers include category-defining companies like Ramp , Cognition, DoorDash, and Suno. They rely on Modal for instant GPU access, sub-second container starts, and native storage, so it's simple to serve low-latency inference, fine-tune models, and access production-ready sandboxes at scale. We've passed $1B in annualized run rate, up 15x from a year ago. In October 2026 we raised a $750M Series D led by Accel at a $15.75B valuation. Our team includes creators of popular open-source projects (e.g., Seaborn , Luigi ), academic researchers, international olympiad medalists, and experienced engineering and product leaders with decades of experience. The Role: We're looking for a Growth Engineer to own the technical foundation of Modal's marketing and developer-facing web surfaces: the marketing site, docs site, growth landing pages, high-profile microsites, forms, analytics instrumentation, and the integrations that help users discover, understand, and get started with Modal. This is a frontend-heavy role for someone with strong product taste, web engineering craft, and a business-owner mindset. You'll partner with Product Engineering, Design, Data, and Growth to ship polished, measurable web experiences from high-profile projects like the GPU Glossary and LLM Engine Advisor to internal tooling that helps teams publish content faster. When this role is going well, Modal launches new pages, docs experiences, campaigns, and experiments quickly without sacrificing performance, craft, or measurement. In this role you will: Own and evolve Modal's marketing

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. As a Senior/Staff Global Facilities Engineer - Mechanical at Micron, you will have the opportunity to work on innovative projects that form the future of semiconductor technology. You will be in charge of providing excellent engineering services and support for the planning, development, construction, operation, and maintenance of critical facilities systems. This role highlights Global Standardization and Alignment, Innovation, Reliability and Performance, and Sustainability. Your duties encompass Semiconductor Mechanical and Process Systems like Cleanroom HVAC, Chilled Water, Heating Water, Makeup Air, Recirculation Air, Process Cooling Water, Process Exhaust, Compressed Air, Process Vacuum, General HVAC, Building, and Fire Protection systems, among others. Responsibilities: Serve as the technical domain expert, providing guidance and support to global, regional, and site facilities and manufacturing teams. Collaborate with internal teams (Technology Development, Procurement, Finance, Legal) to implement engineering solutions and drive innovation. Analyze system designs to improve performance, efficiency, and cost-effectiveness, and support problem-solving using standard methodologies. Benchmark engineering practices across Micron and the industry to maintain and evolve best-known methods (BKMs). Lead and support large-scale infrastructure design and construction projects, ensuring alignment with standards, codes, and regula

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. The Frontend Central Product Integration Engineering (PIE) team delivers best‑in‑class yield, quality, and cycle time through innovation and strong cross‑functional teamwork. Supporting diverse DRAM and NAND technologies across global development and manufacturing sites (Boise, Japan, and fabs in the U.S., Taiwan, Japan, and Singapore), the team identifies, aligns, and deploys best‑known methods across the network. As a Frontend Central Process Integration Senior Engineer, you will develop and optimize processes to drive rapid product maturity. Join us today and make a difference! Responsibilities and Tasks Drive rapid product maturity, improving yield (bits per wafer), repair density, and DPM through fast learning cycles. Apply deep process integration knowledge across FEOL, MOL, CELL, and BEOL to identify optimal solutions; design and circuit knowledge is a plus. Partner with Yield Engineering, Device, RDA, and Metrology teams to resolve key yield issues and build strong inline visibility for fast ramp and excursion prevention. Identify and standardize best‑known methods and business processes across DRAM and NAND sites. Travel to Micron sites as needed for onsite collaboration. Minimum Qualifications Bachelor’s degree in Engineering or a related field 5+ years of experience in process integration, product design, or equivalent technical roles Demonstrated ability to collaborate optimally with global, cross‑functional teams Proven t

Who are we? Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation AI models and end-to-end products that are designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we are looking for folks that want to be part of that. We obsess over what we build. Each one of us is responsible for contributing to increasing the capabilities of our models and the value they drive for our customers. Cohere is a team of researchers, engineers, designers, and more, who are all passionate about their craft. We are a global technology company headquartered in Toronto with key offices in London, New York City, San Francisco, Montreal, Paris, Berlin and Seoul. Join us! The Chief of Staff is a strategic leadership role focused on optimizing sales operations, enabling revenue growth, and ensuring alignment between sales execution and company objectives. This exciting career opportunity offers a blend of operational oversight, strategic planning, and cross-functional collaboration. Key Responsibilities Sales Strategy & Execution: Partner with the CRO to define and implement sales strategies, forecasts, and performance metrics. Operational Excellence: Streamline sales processes, including pipeline management, CRM optimization, and sales enablement tools. Cross-Functional Coordination: Work closely with marketing, product, and customer success teams to ensure cohesive go-to-market execution. Performance Analytics: Monitor sales KPIs, conduct data-driven insights, and recommend adjustments to improve conversion rates and revenue attainment. Team Leadership: Contribute to sales operations, business development, and support functions, fostering a high-performance culture. Stakeholder Management: Serve as a liaison between sales leadership and executive teams, ensuring clear communication and strat

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Role Summary As a Senior Member of Technical Staff (SMTS), you are a module‑level CMP technical authority , responsible for defining CMP technical direction, leading FOAK developments, and driving cross‑functional execution across NAND nodes. As a SMTS (Senior Member of Technical Staff), you will be a part of revolutionary Next Generation NAND research & development CMP team driving Advanced NAND and CMP technology forward. The position promises ample opportunities for innovation, collaboration and testing a new dimension and scaling with Next Generation NAND. A SMTS CMP Engineer is a senior individual contributor responsible for defining, developing, and transferring advanced CMP processes for Micron NAND technologies. You will work directly with process integration and other process areas such as Wet Etch, CVD, Diffusion, Metals, Lithography & Dry Etch. You will work on state of the art and best in class CMP chambers & own the process roadmap to meet program and yield goals. Main Responsibilities Own and lead key NAND CMP process modules, translating technology challenges into executable roadmaps across current and future nodes Drive cross‑functional execution across Technology Development, Process Integration, Manufacturing, a

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Role Summary The DMTS is a recognized expert inside and outside Micron, shaping the technical vision for cell film processes with influence across top-level organizational boundaries, leading programs spanning the engineering group, driving breakthroughs, influencing industry/cross-disciplinary teams, and mentoring senior technical leaders to guide critical roadmap decisions. Owns and updates the cell film process technology roadmap; drives external collaborations and benchmarking; prepares high-impact technical deliverables (presentations/white papers/patent filings); guides investment and prioritization decisions. Main Responsibilities Serve as the CMP technical authority for NAND technology development, defining long‑term technology and equipment strategies Architect and drive next‑generation CMP process innovation, including FOAK developments, recipe architecture, and integration alignment Lead resolution of the most complex yield, defectivity, and integration challenges through deep CMP process, materials, and layout expertise Define and execute CMP hardware and supplier roadmaps, translating industry benchmarking and external insights into internal advantage Provide forward‑looking technical leadership, identifying sc

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Job / Role Summary The MTS is a senior technical contributor who leads critical dry etch modules and advances next-generation NAND scaling by owning key processes, driving equipment roadmaps with hardware teams, and leading multi-functional problem solving for yield, defectivity, and manufacturability. The role requires deep dry etch fundamentals, strong predictive/mitigation thinking, and mentorship contributions aligned to technical leadership expectations. Main Responsibilities Lead development of dry etch technology and essential modules; serve as a dry etch area expert. Develop/innovate dry etch processes to meet structural and electrical specifications; demonstrate mechanistic understanding of parameter-to-outcome relationships. Work closely with hardware teams to develop the

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Role Summary The DMTS is a top technical authority who shapes long ‑ term wet process and chemistry strategy, drives external ‑ facing technical insight into roadmap decisions, and expands Micron’s competitive advantage through supplier exclusivity mechanisms and ecosystem collaboration. Expected to set direction across organizational boundaries, influence long ‑ term technical investment priorities, and establish external perspectives into internal roadmaps. Main Responsibilities Provide vision of future potential of new materials and methods from academic/consortium projects to guide roadmap solution selection

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Job / Role Summary The DMTS provides enterprise ‑ level technical leadership, defining photolithography strategy and shaping industry ‑ relevant technology directions. This role leads & influences development & integration strategy, mentors senior engineers, and drives innovation across development teams. Main Responsibilities Sponsor long-range pathfinding initiatives for future nodes and architectures Establish and steward enterprise ‑ wide, long ‑ term photolithography technology vision and strategic roadmaps. </span

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Job / Role Summary The DMTS is a recognized expert (internally and externally) shaping the technical vision for NAND structural and electrical film processes, with influence spanning top-level organizational boundaries. This role leads breakthrough programs impacting the broader engineering group, guides critical roadmap decisions, mentors senior technical leaders, and represents Micron through strategic external collaborations and industry engagement. Main Responsibilities Shape the technical vision for structural and electrical film processes with enterprise-level impact; own and update the process technology roadmap aligned to business objectives and competitive benchmarks. Lead programs spanning the engineering group to deliver innovative breakthroughs; solve the most challenging technical problems and guide comp

Our vision is to transform how the world uses information to enrich life for all. Join an inclusive team passionate about one thing: using their expertise in the relentless pursuit of innovation for customers and partners. The solutions we build help make everything from virtual reality experiences to breakthroughs in neural networks possible. We do it all while committing to integrity, sustainability, and giving back to our communities. Because doing so can fuel the very innovation we are pursuing. Job / Role Summary The MTS is a senior technical contributor advancing NAND Advanced Thin Films by leading project-level initiatives, executing complex experiments, performing material characterization, and supporting integration and fixing. This role requires strong technical depth in deposition and metrology, consistent delivery of measurable results, and the ability to mentor earlier-career engineers while supporting continuous improvement and transfer readiness. Main Responsibilities Lead project-level initiatives in structural and electrical film processes, especially dielectric (low/ high ‑ k ) and carbon-based films. Carry out complex experiments and support integration under guidance of senior staff; deliver measurable results for the site/department. Support technology transfer and ramp-up activities;