Perplexity

AI Interaction Designer

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Perplexity is a rapidly growing AI-powered answer engine, backed by significant venture investment, aiming to build accurate and trustworthy AI for decision-making. They are seeking an AI Interaction Designer to enhance how their AI communicates with users, transforming complex queries into clear, actionable responses. This role involves designing conversation patterns at scale, building evaluation systems, creating user feedback loops, and collaborating with cross-functional teams to improve AI interactions for millions of users.

Infrastructure Capacity Engineer

<p class="my-4 text-gray-700 leading-relaxed">Perplexity is an AI-powered answer engine founded in December 2022 and growing rapidly as one of the world’s leading AI platforms. Perplexity has raised over $1B in venture investment from some of the world’s most visionary and successful leaders, including Elad Gil, Daniel Gross, Jeff Bezos, Accel, IVP, NEA, NVIDIA, Samsung, and many more. Our objective is to build accurate, trustworthy AI that powers decision-making for people and assistive AI wherever decisions are being made. Throughout human history, change and innovation have always been driven by curious people. Today, curious people use Perplexity to answer more than 780 million queries every month–a number that’s growing rapidly for one simple reason: everyone can be curious.</p><p class="my-4 text-gray-700 leading-relaxed">Perplexity is building the next generation answer engine that helps millions of people find information more effectively. We're looking for an AI Interaction Designer to craft conversations that are clear, helpful, and genuinely useful.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What You'll Do</h2><p class="my-4 text-gray-700 leading-relaxed">You'll design how our AI communicates with users, transforming complex queries into clear, actionable responses. This is conversation design at scale—creating the communication patterns that millions of people rely on every day.</p><p class="my-4 text-gray-700 leading-relaxed">This role involves:</p><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Building evaluation systems that maintain quality as we scale</li><li class="leading-relaxed">Creating feedback loops between user needs and AI improvements</li><li class="leading-relaxed">Collaborating with researchers, product teams, and engineers across the company</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What We're Looking For</h2><p class="my-4 text-gray-700 leading-relaxed"><strong>Exceptional Taste</strong> You have an intuitive sense of what makes communication work. You can spot the difference between a good response and a great one, and you know how to make it better.</p><p class="my-4 text-gray-700 leading-relaxed"><strong>Technical Fluency</strong> You don't need to be a researcher, but you can hold your own with our technical teams. You're comfortable with Python, understand how language models work, and can implement your ideas through code. You naturally think about how individual improvements can scale across thousands or millions of interactions. You've built processes that work at scale before.</p><p class="my-4 text-gray-700 leading-relaxed"><strong>Curiosity and Drive</strong> You're someone who elevates everyone around them. You have high standards but bring people along rather than leaving them behind. You're fascinated by how people naturally communicate and how technology can serve them better.</p><p class="my-4 text-gray-700 leading-relaxed"><strong>Qualifications:</strong></p><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Demonstrated passion for AI and can share specific prompt engineering and chaining projects you're proud of</li><li class="leading-relaxed">Background in data science, philosophy, psychology, linguistics, data science, or related fields</li><li class="leading-relaxed">Familiar with Python and running simple scripts</li><li class="leading-relaxed">High-level understanding of LLMs, training, RL</li><li class="leading-relaxed">Excellent communication skills, particularly in teaching complex concepts</li><li class="leading-relaxed">Creative problem-solving abilities with a "hacker spirit" for solving puzzles</li></ul><p class="my-4 text-gray-700 leading-relaxed"><em>Equity:</em> In addition to the base salary, equity may be part of the total compensation package.</p><p class="my-4 text-gray-700 leading-relaxed">_Benefits: Comprehensive health, dental, and vision insurance for you and your dependents. Includes a 401(k) plan.</p>

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Lambda

Data Center Systems Operations Engineer

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As Lambda scales its AI platform, the Systems Operations Engineer will ensure infrastructure decisions align with product roadmaps and growth. This role, within the Data Center Infrastructure team, focuses on availability analysis, utilization improvement, strategic design input, and program implementation across the entire Infrastructure Stack. It's a critical link between HPC/HW systems and DC Infra, maximizing platform availability and reliability.

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<p class="my-4 text-gray-700 leading-relaxed">We're here to help the smartest minds on the planet build Superintelligence. The labs pushing the edge? They run on Lambda. Our gear trains and serves their models, our infrastructure scales with them, and we move fast to keep up. If you want to work on massive, world-changing AI deployments with people who love action and hard problems, we're the place to be.</p><p class="my-4 text-gray-700 leading-relaxed">If you'd like to build the world's best deep learning cloud, join us.</p><p class="my-4 text-gray-700 leading-relaxed">*Note: This position prefers presence in our Bay Area office locations, but is open to remote presence for the right candidate.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">About the Job</h2><p class="my-4 text-gray-700 leading-relaxed">As Lambda continues to scale its AI platform and customer base, infrastructure decisions must be tightly aligned with product roadmaps, platform growth, and fiscal discipline. The <strong>Systems Operations Engineer</strong> will own availability analysis, long-term improvement of utilization, input into strategic design, and implementation of key programs across the entire Infrastructure Stack.</p><p class="my-4 text-gray-700 leading-relaxed">This role sits within the Data Center Infrastructure (DC Infra) team and will work cross-functionally with Product, Platform Engineering, and Observability to understand overall health, analyze ongoing/potential issues, make recommendations and changes to our overall design, and ownership of key programs to improve the overall business.</p><p class="my-4 text-gray-700 leading-relaxed">This position is a critical link between the HPC/HW systems and DC Infra—and will help ensure our designs and operations most effectively maximize availability and reliability across our entire Platform.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">What You’ll Do</h2><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Availability Analysis</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Own end-to-end unification of availability (number of 9s) calculations across Lambda's data center products and various data center footprints, from the power/BMS/cooling and down into the rack/GPU level, and providing adequate telemetry back to facilities, site operations, and at the platform level</li><li class="leading-relaxed">Work with thermal/hardware team to understand AI workload characteristics on mechanical systems and need for different BMS control methodologies as Direct to Liquid Chip (DLC) Cooling technologies improve and densities increase</li><li class="leading-relaxed">Coordinate across DC Infra team to calculate estimated availabilities for new data center designs</li><li class="leading-relaxed">Work with product teams and capacity forecasting to understand how design decisions effecting availability impact time to market and satisfy customer needs</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Utilization Analysis and Oversubscription Strategy</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Own end-to-end utilization analysis across Lambda's entire data center infrastructure</li><li class="leading-relaxed">Analyze DC designs to understand peak possible capacity under varying conditions</li><li class="leading-relaxed">Build oversubscription strategy and lead/own company workstream to maximize available MW w/o impacting GPU reliability and customer experience</li><li class="leading-relaxed">Ensure appropriate availability considerations are included</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Observability and Analytics</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Coordinate with the observability team to ensure appropriate points are monitored to understand data center characteristics loads, especially under AI workloads</li><li class="leading-relaxed">Help the team understand where approximate warning/danger levels are</li><li class="leading-relaxed">Use observations and warning/danger levels to inform BOD for future Data Centers and suggest upgrades/modifications to current Data Centers</li><li class="leading-relaxed">Develop strategy for a data center fleet health dashboard</li><li class="leading-relaxed">Help provide structure ensuring overall day-to-day and long-term health can be understood from a 20k foot level with the ability to drill down into the details</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Power Capping Strategy and Implementation</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Coordinate with Site Operations team to strategize and build out power capping capabilities, related to worst-case scenario response/protection as we start aggressively employing oversubscription</li><li class="leading-relaxed">Identify appropriate IT blocks where real-time data is monitored</li><li class="leading-relaxed">Analyze, propose, and implement a rigorous testing process that iteratively finds and eliminates stranded power and cooling capacity related to utilization</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Site Selection Technical Review</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Conduct end-to-end technical evaluations of prospective data center sites, including power sufficiency and stability, cooling infrastructure and mechanical systems, and network topology feasibility</li><li class="leading-relaxed">Perform risk assessments and recommend sites based on infrastructure fit and growth capacity.</li><li class="leading-relaxed">Coordinate with DC Infra, Legal, and Business Strategy teams to ensure site selections align with workload and deployment timelines.</li></ul><h3 class="text-xl md:text-2xl font-bold mt-8 mb-3 text-gray-800">Cluster-to-Facility Requirements Alignment</h3><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Collaborate with HPC Architecture team and Capacity Manager to translate cluster-level hardware and workload requirements into facility-level specifications.</li><li class="leading-relaxed">Define infrastructure interface requirements (power, cooling, rack layouts, interconnects, monitoring) to ensure alignment between compute stack and facility capabilities.</li><li class="leading-relaxed">Support long-term infrastructure roadmap development to accommodate future hardware designs, density shifts, and workload patterns.</li><li class="leading-relaxed">Work with Capacity Manager to understand various levers that can be employed to accelerate growth during demand surges.</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">You</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Self-starter with a proven ability to independently dive into the details to understand and solve hard problems across data center infrastructure and operations</li><li class="leading-relaxed">Ability to provide world-class analysis, boiling complex issues into the root cause or few key drivers</li><li class="leading-relaxed">10+ years of experience working in directly in or closely with data center infrastructure and HPC/HW operations</li><li class="leading-relaxed">Deep familiarity with AI or compute workload patterns, scaling dynamics, and infrastructure cost drivers</li><li class="leading-relaxed">Ability to synthesize complex technical and business inputs into clear, actionable strategic recommendations</li><li class="leading-relaxed">Excellent communication and collaboration skills across technical, operational, and financial stakeholders</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Preferred Experience</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Prior experience in hyperscale or cloud infrastructure environments</li><li class="leading-relaxed">Familiarity with GPU cluster sizing, workload forecasting, or energy-efficient compute architectures</li><li class="leading-relaxed">Working knowledge of typical Data Center Infrastructure designs, topologies, systems and associated reliability/availability calculations</li><li class="leading-relaxed">Knowledge of DCIM tools, telemetry systems, or utilization analytics platforms</li><li class="leading-relaxed">Engineering degree from university, Masters preferred.</li><li class="leading-relaxed">Experience working across multi-disciplinary and non-technical teams to explain findings</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Salary Range Information</h2><p class="my-4 text-gray-700 leading-relaxed">The annual salary range for this position has been set based on market data and other factors. However, a salary higher or lower than this range may be appropriate for a candidate whose qualifications differ meaningfully from those listed in the job description.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">About Lambda</h2><ul class="list-disc list-inside my-5 pl-5 space-y-2 text-gray-700"><li class="leading-relaxed">Founded in 2012, ~400 employees (2025) and growing fast</li><li class="leading-relaxed">We offer generous cash & equity compensation</li><li class="leading-relaxed">Our investors include Andra Capital, SGW, Andrej Karpathy, ARK Invest, Fincadia Advisors, G Squared, In-Q-Tel (IQT), KHK & Partners, NVIDIA, Pegatron, Supermicro, Wistron, Wiwynn, US Innovative Technology, Gradient Ventures, Mercato Partners, SVB, 1517, Crescent Cove.</li><li class="leading-relaxed">We are experiencing extremely high demand for our systems, with quarter over quarter, year over year profitability</li><li class="leading-relaxed">Our <a href="https://lambdalabs.com/research" target="_blank" rel="noopener noreferrer" class="text-blue-600 hover:text-blue-800 hover:underline transition-colors duration-200">research papers</a> have been accepted into top machine learning and graphics conferences, including NeurIPS, ICCV, SIGGRAPH, and TOG</li><li class="leading-relaxed">Health, dental, and vision coverage for you and your dependents</li><li class="leading-relaxed">Wellness and Commuter stipends for select roles</li><li class="leading-relaxed">401k Plan with 2% company match (USA employees)</li><li class="leading-relaxed">Flexible Paid Time Off Plan that we all actually use</li></ul><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">A Final Note:</h2><p class="my-4 text-gray-700 leading-relaxed">You do not need to match all of the listed expectations to apply for this position. We are committed to building a team with a variety of backgrounds, experiences, and skills.</p><h2 class="text-2xl md:text-3xl font-bold mt-10 mb-4 border-b pb-2 text-gray-800">Equal Opportunity Employer</h2><p class="my-4 text-gray-700 leading-relaxed">Lambda is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law.</p>

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This assessment gives us an idea of your C++ skills- Companies that evaluate this skillset in interviews: Rockstar Games, Ubisoft, Mayhem Studios, etc.- 10 Multiple Choice questions- Average time to complete: 7 to 10 minutes

Let's assess your Data Structures! - This assessment gives us an idea of your problem solving skills using DSA- Companies that evaluate this skillset in interviews: MPL, LILA Games, GSN Games, etc.- 10 Multiple Choice questions

Data Structures and Algorithms

Let's assess your Programming Patterns! ????- This assessment gives us an idea of your code architecture skills- Companies that evaluate this skillset in interviews: Dirtcube, PTW, Playshifu, etc.

Programming Patterns

Let's assess your OOPs skills! ????- This assessment gives us an idea of your fundamental OOPS concepts and Solid principles skills- Companies that evaluate this skillset in interviews: Hitwicket, GSN Games, Tomo Club, etc.

Object Oriented Programming

Let's assess your Unity Skills ????- This assessment gives us an idea of your Unity fundamentals- Companies you can apply for after taking this assessment: Godspeed games, Salvation Games, nCore Games, etc.