Lead Modeling And Simulation Engineer Jobs

About the Job Set the performance direction behind large-scale AI systems built for real deployment. As a Principal AI Performance Engineer, you will define how Graphcore analyzes and optimizes AI training and inference workloads. Your work will shape decisions across hardware, software, networking and system architecture. You will lead the hardest performance investigations, from model behavior to multi-node scaling. You will turn profiling, benchmarking and modeling evidence into technical roadmaps and engineering priorities. You will set measurement standards, guide distributed communication strategy and review critical C++ and Python tools. Your judgment will help teams make better decisions when data is incomplete. This role gives you rare influence across AI infrastructure at data center scale. It is based in Austin, Texas. The team and culture The System Engineering Performance team architects, evaluates and optimizes high-performance infrastructure for large-scale data center deployments. The team works across the computing stack to understand real system behavior. Work happens through evidence, technical ownership and direct cross-team influence. You will guide strategy, resolve complex tradeoffs and raise performance-engineering standards across the organization. Decisions are shaped by benchmarks, simulations, models and clear technical debate. The team values engineers who think big, act fast, take responsibility, speak up and lead beyond their own area. What we’re looking for · Deep experience profiling and optimizing AI, machine learning or high-performance computing workloads at scale. · Proven technical leadership across complex performance-engineering or system-architecture initiatives. · Expert C++ and Python skills, including reliable tools or performance-sensitive software. · Expert understanding of compute, memory, communication and scaling behavior in distributed systems. · Ability to define benchmarks, measurement practices or optimization sta

Senior Low Observables (LO) Mission Systems Integration Engineer Company: The Boeing Company The Senior LO Mission Systems Integration Engineer will lead design, integration, analysis, test, and production activities for low observable materials, structures, apertures, sensors, and radomes for mission systems. The role requires strong technical leadership, independent execution of complex tasks, advanced use of computational electromagnetic (CEM) solvers, and the ability to produce and defend technical results with minimal oversight. Key Responsibilities Lead design, modeling, and analysis efforts for LO materials, coatings, structures, and integrated mission systems to meet signature reduction and performance requirements. Independently apply CEM solvers (e.g., FEKO, HFSS, CST, WIPL‑D, xFDTD, or equivalent) to model antennas, apertures, radomes, and LO treatments; perform design optimization and trade studies. Drive integration of LO treatments with mechanical, thermal, and sensor/antenna system constraints; identify and mitigate producibility, testability, and sustainment risks. Plan, execute, and oversee laboratory and field tests (anechoic chamber measurements, antenna/radome characterization, RCS measurements); lead data collection, reduction, and validation activities. Develop and validate predictive models, reconcile simulations with measurements, perform uncertainty quantification, and provide actionable recommendations to engineering and program leadership. Produce high-quality technical documentation: test plans, test reports, technical memoranda, design reviews, and customer briefings. Mentor and provide technical oversight to junior engineers and technicians; ensure adherence to engineering processes, qual

About the job Shape the power-delivery architecture behind Graphcore’s high-performance AI compute systems, from voltage regulation through package, PCB and silicon. As Staff Power Integrity Engineer, you will provide technical leadership on Graphcore’s most complex power-delivery challenges. Your analysis and judgement will directly influence architecture and product decisions. You will define modelling strategies, optimise decoupling and analyse PDN impedance, voltage droop, transient response and regulator interactions. You will turn complex results into clear engineering decisions, requirements and sign-off approaches. You will lead significant PI issues through resolution and create alignment across silicon, package, board, power, systems and validation teams. You will also develop reusable methods and mentor engineers, raising power-integrity capability across Graphcore. The team and culture The Signal and Power Integrity team sits at the centre of Graphcore’s hardware development. We work across disciplines to understand electrical behaviour and guide consequential architecture decisions. You will own complex PI problems and drive them through to resolution. Decisions are grounded in modelling, first-principles reasoning, hardware evidence and clear assessment of uncertainty. You will challenge assumptions, communicate risk clearly and help teams make pragmatic trade-offs. Technical influence matters more than reporting lines. What we’re looking for Deep practical expertise in power integrity and complex power-delivery network design. Strong understanding of PDN impedance, transient behaviour, voltage droop, resonance, stability and decoupling across high-current digital systems. Ability to reason across silicon, package, PCB, voltage regulation and system boundaries. Strong capability in electromagnetic modelling, circuit simulation, model extraction and selecting appropriate abstraction methods. Engineering judgement to assess model validity, uncertainty an

Who We Are Nuro believes self-driving vehicles are the most immediate and profound opportunity for AI to drive positive change in the physical world. Safer streets, more time for what matters, and easier access to the world around us, that’s why we’re building a universal autonomy platform: self-driving for all roads and all rides. Founded in 2016, Nuro is a physical AI company developing Level 4 autonomous driving technology for a wide range of vehicles, use cases, and markets. Powered by the Nuro Driver™, our universal autonomy platform enables the global mobility ecosystem to deploy autonomy at scale, from robotaxis and logistics fleets to personal vehicles. With years of real-world deployment experience and a flexible, partner-led business model, Nuro is working toward a future where millions of autonomous vehicles powered by our technology help make everyday life safer, easier, and more connected. Nuro has raised over $2B in capital from Uber, NVIDIA, Google, Softbank, Fidelity, T. Rowe Price, and other leading investors. About the Role We are looking for an Autonomy Leader to drive the technical roadmap for the systems that validate and verify the intelligence of the NuroDriver. In this role, you will lead the development of evaluation tooling that ensures our technology scales safely to millions of people. You will tackle real-world robotics challenges, bridging the gap between simulation and reality to improve everyday lives. Intelligent Agents: Design and deploy "smart" evaluation agents that simulate complex interactions. Intelligent Metrics: Design and deploy advanced algorithms that measure the cognitive performance of the ML models powering our self-driving car’s behavior, utilizing physics-based modeling and machine learning. Close the Learning Loop: Leverage these evaluation frameworks to identify specific behavioral weaknesses in the NuroDriver, driving technical execution to refine the agent's decision-making logic. Define the Technical Archit

Level Up Your Career with Zynga! At Zynga, we bring people together through the power of play. As a global leader in interactive entertainment and a proud label of Take-Two Interactive, our games have been downloaded over 6 billion times—connecting players in 175+ countries through fun, strategy, and a little friendly competition. From thrilling casino spins to epic strategy battles, mind-bending puzzles, and social word challenges, our diverse game portfolio has something for everyone. Fan-favorites and latest hits include FarmVille™, Words With Friends™, Zynga Poker™, Game of Thrones Slots Casino™, Wizard of Oz Slots™, Hit it Rich! Slots™, Wonka Slots™, Top Eleven™, Toon Blast™, Empires & Puzzles™, Merge Dragons!™, CSR Racing™, Harry Potter: Puzzles & Spells™, Match Factory™, and Color Block Jam™—plus many more! Founded in 2007 and headquartered in California, our teams span North America, Europe, and Asia, working together to craft unforgettable gaming experiences. Whether you're spinning, strategizing, matching, or competing, Zynga is where fun meets innovation—and where you can take your career to the next level. Join us and be part of the play! Position Overview: As a Game Economy Lead, you will build and optimize in-game economies that balance engaging player experience with sustainable monetization. Applying data-driven models and game design principles, you will focus on improving long-term retention, revenue, and player satisfaction throughout the game’s lifecycle! What You’ll Do: Economy Design & Optimization: Design, manage, and optimize complex in-game economies, including virtual goods, currencies, pricing models, and reward systems for events and progression paths. Set ideal pricing to balance long-term player satisfaction with strong monetization opportunities. Modeling & Simulation: Build models, predictive simulations, and prototypes to proactively forecast the impact of game features, content updates, and game balance on player beh

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. 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. Responsibilities: The Space Modeling Layout Manager needs to lead Layout planners to develop space and transfer optimization strategies for fab expansion, technology migration, and future intelligent fab development. Drive best-in-class space utilization, transfer efficiency, and cost-effective solutions through modeling, simulation, and data-driven decision making. AI proficiency or AI‑enabled ways of working where applicable to support Micron’s AI transformation and ensures roles are aligned to our future workforce needs. Key Job: Lead and develop the Space Modeling team. Develop long-term Fab and office space strategies and AI-enabled planning systems, to support future fab development, expansion flexibility, and transfer optimization. Drive Fab space efficiency, transfer efficiency, and Bits per Square (BPS) improvement through BKM, data-driven analysis and cost-effective solutions. Enhance transfer simulation models to support busin

ROLE SUMMARY As an AI-enabled strategic scientific leader, you will partner with Oncology Research Leadership to integrate AI-driven strategies that will drive data-informed decision-making across our Oncology Research pipeline. As the AI Portfolio Lead, you will bridge cutting-edge AI/advanced analytics with deep Oncology R&D expertise to guide our portfolio strategy. Working as an individual contributor reporting into the Head, Portfolio Strategy and Program Management, you will analyze and continuously assess Oncology Research projects using AI-driven insights (predictive models, scenario simulations, competitive intelligence) and propose actionable strategies to Oncology Research Leadership. This role is science-focused and spans across discovery and preclinical stage programs, ensuring that our project teams pursue the most promising scientific approaches and mechanisms of action. Your work will directly inform pipeline prioritization and resource allocation decisions, enhancing the quality and objectivity of governance deliberations with robust data. ROLE RESPONSIBILITIES Portfolio Analysis and Insights: Continuously analyze the oncology Research portfolio (ESD through Preclinical) using advanced AI/ML tools and analytics to evaluate each program’s scientific strength, probability of success, and strategic portfolio fit per disease area strategies. Strategy Recommendation: Develop and propose data-driven portfolio strategies (at both project and portfolio levels) to senior leaders and Research governance committee. Use scenario analysis and predictive modeling to highlight optimal project prioritization, pipeline balance, and resource allocation scenarios. AI-Enabled Decision Support: Integrate AI-derived insights (e.g. machine learning predictions, knowl

Join us in building the future of finance. Our mission is to democratize finance for all. An estimated $124 trillion of assets will be inherited by younger generations in the next two decades. The largest transfer of wealth in human history. If you’re ready to be at the epicenter of this historic cultural and financial shift, keep reading. About the team + role Robinhood is seeking a Senior Manager, Valuation to lead and execute valuation analyses for private company investments, minority equity stakes, and other illiquid financial instruments held across the organization. This role will partner closely with Technical Accounting & Financial Reporting (TAFR), Corporate Development, and the RHV Private Markets Valuation Committee to ensure valuations are well-supported, defensible, and compliant with US GAAP (ASC 820, ASC 321/323) and SEC reporting requirements. This role reports into Technical Accounting & Financial Reporting (TAFR) leadership and works closely with the RHV Private Markets Valuation Committee. This role is based in our Menlo Park, CA, New York, NY, and Chicago, IL office(s), with in-person attendance expected at least 3 days per week. At Robinhood, we believe in the power of in-person work to accelerate progress, spark innovation, and strengthen community. Our office experience is intentional, energizing, and designed to fully support high-performing teams. What you’ll do Financial Modeling & Valuation Analysis Build and maintain complex financial models (DCF, comparable company/precedent transaction analyses, OPM/PWERM, Monte Carlo simulations) to support fair value measurements of private company investments and other illiquid holdings. Perform quarterly and event-driven valuations for private equity/venture-style investments, including waterfall/allocation analyses across complex capital structures (preferred stock, SAFEs, convertible notes, warrants). Develop and refine valuation methodologies in line with AICPA Private Equity a

About BlueConic: We are building products with AI at the core, and we build our products using AI. Agents and skills write a share of our code, run parts of our SDLC, and operate alongside our engineers every day. We need a Staff Security Engineer who can secure that reality, not the SDLC of five years ago. In conjunction with the CISO you represent security across the product development lifecycle, lead threat modeling and vulnerability management, and drive secure coding practices in an environment where code review means reviewing agent output as often as human output. You will use AI agents and skills as core tools of your own job: building automation, running threat models, triaging vulnerabilities, and scaling your impact across teams. Lead Security Engineer What you'll do Drive adoption of secure coding practices, including practices specific to AI-generated and AI-assisted code. Conduct security assessments, threat modeling, and risk analysis so threats are understood, documented, and mitigated. Automate security processes wherever it creates leverage, using scripts, AI agents, and AI skills as your default tools. Identify emerging classes of vulnerabilities and build solutions before they become incidents. Build and maintain security tooling, automation, and monitoring capabilities, including custom agents and skills for security workflows Threat model agentic systems: prompt injection, tool misuse, unauthorized agent privilege escalation, and data exfiltration through agent actions. Define guardrails and human-in-the-loop checkpoints for agent-driven changes to code and infrastructure. Set and enforce review standards for code produced by AI coding agents, including required checks before agent-authored changes reach production. Break large, cross-team security projects into individual tasks. Manage scope across teams and drive projects to closure. Monitor, investigate, and respond to security incidents, coordinating remediation across teams. S

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. AI is reshaping what product security can accomplish, both as a target and as a tool. We're looking for a Principal Security Engineer to own the highest-leverage application security work at Smartsheet: leading threat modeling and product security reviews across a modern SaaS platform used by millions of customers, serving as the team's technical authority on AI security risk, and setting the technical standard for application security practice across the engineering organization. This is the most senior individual contributor role on the Application Security team. The expectation is not just depth: it is reach. You will engage product and engineering leadership directly, drive security requirements rather than advisory recommendations, and build team capability over time. If you are a security engineer who thinks upstream, builds threat models that generate concrete test scenarios and can translate technical findings into architecture decisions and business outcomes, this role is built for you. This role reports to the Manager, Application Security and can be based in our Bellevue, WA office or remotely from anywhere in the US where Smartsheet is a registered employer. You Will: Lead Threat Modeling and Product Security Reviews: Own threat modeling and product security review as the team's primary upstream capability: build models from architecture and data-flow artifacts, derive concrete abuse cases and test scenarios, and drive security requirements into designs before they ship. Define and lead the product secu

About the Job: LaunchDarkly's Product Security team is hiring a Product Security Engineer II to strengthen how we secure the platform engineers build with every day. You'll bring depth in security fundamentals and program design as a member of a small, high-leverage team with strong engineering instincts. LaunchDarkly is critical infrastructure. Our security team keeps it safe for the global systems that depend on us. You'll spend most of your time on threat modeling and cloud security posture, with rotating exposure to the rest of the ProdSec surface area. Your work will help developers move fast without sacrificing security, through automation, guidance, and the kind of partnership that makes the secure path the easy one. You'll report to the Director of Security and work closely with software engineers, product managers, and other security engineers. We expect you to bring a sharp point of view on where AI can take work off the team's plate and make our coverage deeper. Responsibilities: Lead threat modeling engagements on the features and services where the risk warrants it. Partner with the ProdSec lead to evolve the practice from on-request to repeatable, with clear criteria for when an engagement is worth running. Own day-to-day triage of CNAPP findings end to end. Investigate, prioritize, route to service owners, and close the loop. Look for patterns that point to systemic fixes instead of one-off cleanup. Contribute to SDLC tooling, SAST / SCA workflows, and bug bounty triage as the team's work demands. Partner with product engineering teams as a trusted reviewer. Catch issues early, explain the why, propose paths forward. Say no when needed, with reasons and alternatives. Bring AI to the work. Use it to accelerate triage, summarize findings, draft threat models, scan code, and reduce toil. Help the team build durable patterns for safe and effective use, not one-off prompts. Push the security floor up over time through documentation, office hours, small too

As a Senior Security Engineer within Application Security at Datadog, you will help secure emerging application architectures where established security patterns may not yet exist, including agentic applications, LLM-enabled products, protocol-driven tool use, and untrusted execution environments. You will establish and validate security models, requirements, and controls while partnering with product and platform teams to develop secure-by-default approaches. Your work will address evolving trust boundaries, agent identity, data access, tool permissions, and runtime behavior through threat modeling, security solutions, and practical implementation. You will have the opportunity to shape how Datadog safely supports new application paradigms and address emerging security risks before they become systemic. At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them. What You’ll Do: Define security models, requirements, and guardrails for emerging application architectures where established patterns are incomplete or do not yet exist. Design, implement, and validate practical security controls that reduce risk in emerging architectures and high-risk system behaviors. Shape how emerging systems authenticate, authorize actions, isolate workloads, and access data, applying least-privilege principles throughout. Partner with product, platform, Infrastructure Security, and other engineering teams to identify security gaps and embed secure-by-default requirements from early design through production. Lead threat modeling and security assessments for new and existing products, focusing on evolving threats, unfamiliar trust boundaries, and new interaction patterns. Prioritize and drive remediation of emerging security risks, including continuous security testing where it provides durable cover

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more places around the world. And we get to do the best work of our career and grow our skills surrounded by colleagues who have our backs. If you’re ready to see your impact and unlock incredible career growth opportunities, join us, and build real world value. THE WORK: As a Senior Staff Security Engineer, you will be one of Ripple's most senior technical security practitioners, operating at the intersection of application security, cloud infrastructure security, and secure software delivery. This role exists to raise the technical bar and extend Ripple's security posture as the engineering organization scales across new products, new architectures, and an increasingly sophisticated threat landscape. You will serve as the dedicated security engineering partner for Ripple Treasury. You will lead the technical direction for product and infrastructure security, partnering with Ripple Treasury Product and Engineering teams to drive secure design, threat modeling, vulnerability management, and cloud security architecture. WHAT YOU’LL DO: Serve as the dedicated Security Engineering partner for Ripple Treasury BU, owning the security posture of the Treasury solution and infrastructure environment from assessment through remediation and ongoing maturity improvement. Lead threat modeling and security architecture reviews across Treasury offerings. Own the secure software development lifecycle for your product surface area, defining security guardrails, CI/CD integrations, and developer guidance that make secure by default a practical reality. Drive the cloud security architecture for Treasury across Azure and AWS, inclu

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more places around the world. And we get to do the best work of our career and grow our skills surrounded by colleagues who have our backs. If you’re ready to see your impact and unlock incredible career growth opportunities, join us, and build real world value. THE WORK: As a Senior Staff Security Engineer, you will be one of Ripple's most senior technical security practitioners, operating at the intersection of application security, cloud infrastructure security, and secure software delivery. This role exists to raise the technical bar and extend Ripple's security posture as the engineering organization scales across new products, new architectures, and an increasingly sophisticated threat landscape. You will serve as the dedicated security engineering partner for Ripple Treasury. You will lead the technical direction for product and infrastructure security, partnering with Ripple Treasury Product and Engineering teams to drive secure design, threat modeling, vulnerability management, and cloud security architecture. WHAT YOU’LL DO: Serve as the dedicated Security Engineering partner for Ripple Treasury BU, owning the security posture of the Treasury solution and infrastructure environment from assessment through remediation and ongoing maturity improvement. Lead threat modeling and security architecture reviews across Treasury offerings. Own the secure software development lifecycle for your product surface area, defining security guardrails, CI/CD integrations, and developer guidance that make secure by default a practical reality. Drive the cloud security architecture for Treasury across Azure and AWS, inclu

At Ripple, we’re building a world where value moves like information does today. It’s big, it’s bold, and we’re already doing it. Through our crypto solutions for financial institutions, businesses, governments and developers, we are improving the global financial system and creating greater economic fairness and opportunity for more people, in more places around the world. And we get to do the best work of our career and grow our skills surrounded by colleagues who have our backs. If you’re ready to see your impact and unlock incredible career growth opportunities, join us, and build real world value. THE WORK: As a Senior Staff Security Engineer, you will be one of Ripple's most senior technical security practitioners, operating at the intersection of application security, cloud infrastructure security, and secure software delivery. This role exists to raise the technical bar and extend Ripple's security posture as the engineering organization scales across new products, new architectures, and an increasingly sophisticated threat landscape. You will serve as the dedicated security engineering partner for Ripple Treasury. You will lead the technical direction for product and infrastructure security, partnering with Ripple Treasury Product and Engineering teams to drive secure design, threat modeling, vulnerability management, and cloud security architecture. WHAT YOU’LL DO: Serve as the dedicated Security Engineering partner for Ripple Treasury BU, owning the security posture of the Treasury solution and infrastructure environment from assessment through remediation and ongoing maturity improvement. Lead threat modeling and security architecture reviews across Treasury offerings. Own the secure software development lifecycle for your product surface area, defining security guardrails, CI/CD integrations, and developer guidance that make secure by default a practical reality. Drive the cloud security architecture for Treasury across Azure and AWS, inclu