Software Engineer, Simulation

Waymo is at the forefront of autonomous driving technology, dedicated to becoming the most trusted driver globally. Originating from the Google Self-Driving Car Project in 2009, our primary goal has been to develop the Waymo Driver—The World’s Most Experienced Driver™. Our innovations aim to enhance mobility access while saving countless lives lost to traffic accidents. The Waymo Driver powers our fully autonomous ride-hail services and is adaptable across various vehicle platforms and product applications. Having completed over ten million rider-only trips, our technology has autonomously navigated over 100 million miles on public roads and executed tens of billions of miles in simulations across more than 15 U.S. states.Your Role:Lead the technical strategy for the Simulator’s issue response lifecycle, encompassing automated detection, root cause analysis, and the deployment of both temporary and permanent software solutions to prevent future regressions.Direct complex, cross-functional projects to enhance automated issue detection by integrating new data sources and signals, thus reducing the time from an in-field event to mitigation deployment.Work closely with Data Science, Systems Engineering, and operations teams to improve technical processes and tools, accelerating the deployment and validation of solutions for identified issues.Mentor mid-level and junior engineers on sophisticated technical challenges, best practices in system architecture, and high-quality software development, serving as a technical force multiplier.

Join Waymo as a Staff Software Engineer specializing in Simulation Capacity Optimization. In this pivotal role, you will leverage your expertise in software engineering and simulation technology to enhance our autonomous vehicle systems. Your contributions will be vital in optimizing the performance and efficiency of our simulations, ensuring that our vehicles are equipped to navigate the complexities of real-world environments.

tvScientific, now part of Pinterest, develops a connected TV (CTV) advertising platform designed for performance marketers. The platform combines media buying, optimization, measurement, and attribution, all in one place. The team includes industry veterans with experience in programmatic advertising, digital media, and ad verification. Advertisers use tvScientific to automate and enhance TV ad campaigns, drawing on large-scale data and advanced technology to improve results and scale efficiently. Role overview The Senior Software Engineer - AI & Simulation will focus on expanding simulation and AI features within the platform. This role centers on designing and building systems that represent the CTV advertising landscape. Key areas include: Simulating auction mechanics and bidding strategies Modeling campaign performance and testing counterfactual scenarios In addition, this engineer will help develop AI-powered tools that accelerate the creation, evaluation, and deployment of machine learning systems. Location This position is based in San Francisco, CA, or can be performed remotely within the United States.

Why Join UsAt Brex, we are revolutionizing corporate spending with our AI-driven platform. We empower businesses to manage their expenses confidently through integrated corporate cards, banking services, and global payment solutions, complemented by intuitive software for travel and expense management. From startups to established enterprises like DoorDash, Flexport, and Compass, thousands of companies rely on Brex to control spending proactively, reduce costs, and enhance efficiency on a global scale.Joining Brex means pushing your limits, questioning the status quo, and collaborating with some of the industry’s brightest minds. We are dedicated to fostering a diverse team and an inclusive culture, believing that your potential should only be limited by your dreams. We empower you with the tools, resources, and support needed to advance your career.AI at BrexOur AI Engineering team is redefining finance management by embedding intelligent, autonomous systems into the Brex platform. We develop AI agents that not only provide insights but also take action to optimize spending, manage workflows, and make real-time decisions for our customers. By integrating proprietary financial data with our product and platform infrastructure, we simplify complex financial operations into seamless, automated experiences, setting a new standard for modern finance.What You’ll DoAs a Senior Software Engineer, you will be responsible for Brex’s simulation and validation platform for AI-driven products. Your primary goal is to ensure that every AI interface at Brex is rigorously tested under realistic conditions, enabling teams to deploy with confidence.You will design a system that leverages synthetic data and scenario generation to create a recursive self-improvement loop. Product teams will depend on this platform to detect regressions proactively, validate new features safely, and continuously refine prompts and agent behaviors. This platform will operate within isolated, ephemeral environments closely resembling production.This is not a research position; it involves actively engaging with real products, creatively breaking them to foster organizational improvement.Where You’ll WorkThis position is based in our San Francisco office. We offer a hybrid work environment that blends the energy of in-office collaboration with the flexibility of remote work. We require team members to be in the office three days a week—Monday, Wednesday, and Thursday—while also allowing up to four weeks of fully remote work each year!

Astranis is at the forefront of satellite technology, specializing in the construction of advanced satellites designed for high geostationary orbits. Our innovative solutions extend humanity's reach into the solar system, delivering dedicated and secure network services to a diverse range of esteemed clients, including large corporations, sovereign nations, and the United States military. With five operational satellites and numerous upcoming launches, we are committed to fulfilling over $1 billion in commercial contracts.We pride ourselves on being the go-to partner for satellite communications, particularly for clients with rigorous demands regarding uptime, data security, network visibility, and customization. Backed by over $750 million in funding from prominent investors such as Andreessen Horowitz, Blackrock, and Fidelity, our team of 450 engineers and entrepreneurs is dedicated to advancing satellite technology. All operations, from design to assembly, are conducted in our state-of-the-art 153,000 sq. ft. headquarters located in Northern California.Position OverviewAs a Simulation Software Engineer within our Guidance, Navigation, and Control (GNC) team, you will play a pivotal role in designing, developing, and testing high-fidelity spacecraft simulations that validate the software controlling our satellites in orbit.In this position, you will enhance our core simulation infrastructure and work collaboratively with cross-functional engineering teams to model new systems and introduce exciting features into the simulator.

At Crusoe, we are dedicated to accelerating the abundance of energy and intelligence. As a pioneering AI infrastructure company, we control every aspect of our operations — from energy generation to the digital tokens that power the world’s most ambitious AI workloads. Joining Crusoe means being part of a team that is shaping the future at an unprecedented pace.We are amid a transformative industrial revolution. The endless demand for AI computing power poses significant challenges, particularly concerning energy supply. Our energy-first strategy not only enhances AI infrastructure but also contributes positively to the environment, empowering innovators in the AI sector.We seek proactive, problem-solving team members who recognize the scale of our mission and are eager to navigate uncharted territories. If you aspire to advance your career alongside experts in energy, manufacturing, data center construction, and cloud services, we invite you to become part of our dynamic team.If you are ready to engage in the most impactful work of your career, assist our customers and partners in elevating their AI strategies, and contribute to a high-performing, supportive team, we welcome you to build the future with us at Crusoe.About This RoleThe Cloud Storage team at Crusoe is searching for a Senior Staff Software Engineer to act as the principal architect for our storage strategy. Unlike a Staff Engineer who leads feature development, a Senior Staff Engineer will define the long-term technical roadmap essential for our AI-scale infrastructure. You will play a crucial role in establishing the architectural strategy, ensuring the integrity and global scalability of our specialized storage services. Your work will focus on the underlying physics of the stack, bridging high-performance NVMe hardware with globally distributed object storage solutions that compete with S3.Your ResponsibilitiesArchitectural Vision & Strategy: Lead the development and execution of the long-term technical strategy for Crusoe's storage engine, while identifying and integrating industry trends such as CXL and NVMe-oF into a unified roadmap.System Programming Expertise: Utilize your extensive experience in system programming with languages such as C, C++, Go, and Rust to lay the groundwork for our V2 storage re-architecture.Storage Protocols: Design and implement solutions employing industry-standard storage protocols, including NFS, SMB, iSCSI, and NVMe/TCP.

Checkr, Inc. is looking for a Senior Staff Software Engineer in San Francisco, California. This position centers on designing and building software that supports the company's mission to transform the background check industry. Role overview This role involves tackling complex engineering challenges and developing solutions that have a direct impact on Checkr's products. Projects will focus on creating and improving software applications that serve a wide range of users and use cases. Collaboration Senior Staff Software Engineers at Checkr work closely with colleagues from different departments. Expect to partner with cross-functional teams to ensure software meets technical and business needs. What you will do Build and maintain software applications that support Checkr's core services Address challenging problems with thoughtful, scalable solutions Work collaboratively with teams across engineering, product, and other functions

About Our TeamJoin our innovative Robotics team at OpenAI, where we are dedicated to pioneering general-purpose robotics and advancing towards AGI-level intelligence in dynamic, real-world environments. By working across the entire model stack, we seamlessly integrate state-of-the-art hardware and software to explore a wide variety of robotic form factors. Our mission is to harmoniously combine advanced AI capabilities with the constraints of physical systems, ultimately enhancing the lives of individuals worldwide.About the RoleWe are on the lookout for a passionate Simulation Realism Engineer to lead our initiative in achieving quantitative realism in simulation for robotics research and product development. You will be responsible for devising strategies, tools, and operational practices that bridge the sim-to-real gaps across physics, sensors, and rendering. Collaborating cross-functionally with research, software, hardware, and operations teams, you will identify key realism gaps, establish measurable realism metrics, and deliver impactful engineering solutions — from fine-tuning engine parameters and setting asset standards to integrating third-party engines and managing simulations at scale. This hands-on engineering role combines scientific precision (measurement & validation) with practical systems work (tooling, cloud ops, and CI/HIL pipelines).This position is based in San Francisco, CA, with a requirement of 4 days in the office per week. Relocation assistance is available for new hires.Your Responsibilities:Establish and operationalize realism metrics & protocols. Design experiments and automated tests to identify specific areas of non-realism, quantify gaps, and monitor regressions over time.Optimize engine parameters (contacts, friction, mass/density, solver settings) and object models to ensure simulated dynamics align with real-world measurements.Assess, integrate, and where necessary, extend third-party physics, rendering, and sensor simulation engines (e.g., Isaac, PhysX, MuJoCo). Lead vendor proof of concepts and benchmark features to inform roadmaps.Develop standards and guidelines for authoring and validating asset physical/visual properties; implement semi- or fully-automated pipelines to tune and optimize assets for target engines.Resolve technical challenges related to running engines in the cloud (OS, drivers, GPU), parallelize simulations (batch multiple runs per engine instance), and fortify real-world-facing pipelines to ensure reliable simulation at scale.Lead validation campaigns (teleoperation, HI...) to verify simulation accuracy and performance.

Join our innovative engineering team at Twitter Inc. as a Senior Staff Software Engineer. We are looking for talented individuals who are eager to tackle complex challenges and contribute to the development of cutting-edge technology. In this role, you will lead projects, mentor junior engineers, and collaborate with cross-functional teams to enhance our platform.

At NerdWallet, we strive to illuminate every financial decision in life, and this mission thrives on our extraordinary team of Nerds. We are committed to nurturing an inclusive, flexible, and transparent culture that empowers you to grow, take calculated risks, and express your authentic self (cape optional). Whether you prefer to work remotely or from our office, we support your best working environment. Your well-being, professional development, and impact are our priorities because when one Nerd excels, we all benefit.As a Senior Staff Software Engineer, you will be pivotal in architecting, developing, and upkeeping intricate software systems while providing invaluable technical leadership to your team. Your main focus will be to design scalable and efficient solutions that fulfill both functional and non-functional requirements such as performance, security, and maintainability.You will write high-quality, scalable, and efficient code, ensuring our software aligns with business and technical specifications. Your role also encompasses reviewing and refining existing code, conducting comprehensive testing, and troubleshooting complex challenges to enhance system performance and reliability. Additionally, you will mentor junior developers, cultivating a continuous learning environment and promoting best practices in coding, architecture, and software development methodologies. Collaboration with cross-functional teams, including product managers, designers, and quality assurance professionals, will be essential to ensure that our technical solutions align with business goals. Strong communication, problem-solving skills, and the ability to work autonomously while leading projects are crucial for your success in this role.This position reports to the Senior Manager of Engineering.Projects you may be involved in include:Enhancing and developing new insurance flows through our marketing funnels utilizing A/B testing, micro-optimizations, and ordering changes for auto, home, life, Medicare, and travel insurance.Designing and implementing secure, scalable backend integrations with partner and third-party platforms to boost conversions and user engagement.Leading the development of high-impact insurance user experiences, including organic SEO pages that drive significant traffic and user flows across various insurance products (auto, home, life, Medicare, U65 health, travel, and pet).Instrumenting our systems within our Observability platform, Datadog.

The Bot CompanyAt The Bot Company, we are on a mission to create an innovative robot for every household.Located in the heart of San Francisco, our dedicated team consists of talented engineers, designers, and operators with backgrounds from industry leaders like Tesla, Cruise, OpenAI, Google, and Pixar. Our collective experience includes delivering products to hundreds of millions of users, and we understand what it takes to craft extraordinary products and experiences.Our lean team structure fosters rapid decision-making and minimizes bureaucracy, allowing every individual to take ownership and responsibility. We embrace a culture of rapid iteration and swift execution, encouraging collaboration across various domains.Ideal Candidate TraitsWe seek candidates who exhibit exceptional sharpness and the ability to thrive in fast-paced, high-stakes environments. Throughout the hiring process, candidates should demonstrate:Exceptional mental acuity: Quick thinkers who can learn rapidly and navigate unfamiliar challenges.Engineering curiosity: A natural inclination to explore how systems operate, even beyond one's area of expertise.High-performance mindset: Ability to adapt swiftly, manage ambiguity, and excel in demanding situations.Role Overview: Simulation EngineerAs a Simulation Engineer, you will be responsible for developing and enhancing the simulation systems that drive our robotics development workflow. This includes implementing new simulation features, adjusting framework internals, and leveraging tools such as Isaac or MuJoCo to accurately replicate complex real-world behaviors.RequirementsProficient coding skills in Python and/or C++.Significant experience with Isaac or MuJoCo, including making substantial framework-level modifications and developing new functionalities.A strong academic or open-source background: high-quality datasets, public code contributions, a robust GitHub presence, and publications as a primary author.Key ResponsibilitiesDevelop new simulation features while extending the core physics and engine internals.Design high-fidelity simulations of robotic systems and their environments.Work collaboratively with cross-functional teams in robotics, perception, and platform domains to ensure simulation precision and scalability.Drive rapid execution and iteration on simulation improvements.

About the Senior Staff Software Engineer Role Crusoe Technologies is hiring a Senior Staff Software Engineer for the CAPE project in San Francisco, CA. This role focuses on building and maintaining scalable software that strengthens our infrastructure and streamlines operations. What You Will Do Design and develop software solutions for the CAPE project Maintain and improve existing systems to support infrastructure growth Work closely with teams across disciplines to deliver reliable, efficient software What We Look For Advanced programming skills Deep understanding of software architecture Experience collaborating with cross-functional groups

About the TeamThe Launchpad team comprises innovative engineers who work closely with our VP of Product & Design and our Co-founder to uncover strategic business opportunities and develop cutting-edge solutions.About the RoleDoorDash is seeking a seasoned backend engineer to take charge of a confidential initiative. Over the last year, the Launchpad team has gained significant traction with a range of emerging hardware-integrated products. This is a hands-on technical position focused on designing backend systems and APIs that must function flawlessly 24/7, regardless of network conditions, while rapidly deploying new features and collaborating cross-functionally with Product, Design, and Hardware teams.You will report directly to the Head of Launchpad Engineering.You’re Excited About This Opportunity Because You Will…Design robust backend solutions to support in-field hardware devices around the clock.Collaborate with Product Managers, Business leaders, and key stakeholders to define the team’s roadmap and vision, and oversee the execution of that roadmap.Thrive in an ambiguous, fast-paced business environment.Promote innovation, teamwork, the implementation of advanced technologies, and creative problem-solving.We’re Excited About You Because You Have…A Bachelor's, Master's, or PhD in Computer Science or a related field.Over 10 years of industry experience.Proven experience leading complex distributed systems projects and mentoring other engineers.A strong background as an engineer in a fast-paced, product-oriented development environment.Extensive experience in designing and scaling backend services for performance and reliability.A track record of shipping consumer-facing products at scale.

Employee Applicant Privacy NoticeAbout Us:Join us in shaping a brighter financial future. Together with our members, we are transforming the way individuals perceive and engage with personal finance.As a pioneering financial services company and national bank, we harness innovative, mobile-centric technology to empower millions of our members in achieving their financial goals. The industry is currently under a remarkable transformation, and we are proud to be at the forefront of this evolution. Every day, we come to work knowing our actions directly influence people's lives, guided by our core values. Join us to invest in yourself, your career, and the world of finance.The RoleWe are actively seeking a Senior Staff Engineer to become an integral part of our team. SoFi is launching a new unit dedicated to developing cryptocurrency products and services for our members. Recent advancements have opened a pathway for SoFi to re-enter this space and expand our offerings with intuitive, secure, and comprehensive solutions across crypto investing, transfers, payments, custody, and more.In this role, you will be at the heart of our efforts—designing functionality, architecting our systems, resolving bugs, ensuring code health, and continuously evolving as an engineer. The ideal candidate is proactive and hands-on, possesses a strong sense of ownership and commitment to delivery, and excels as a mentor and collaborator. At SoFi, we value collaboration among Product, Design, and Engineering, so you will engage in the entire product lifecycle, from conception to deployment and ongoing enhancement.At SoFi, you will be part of a transformative financial company with the ambition to help our members achieve financial independence and meet their goals. We strive to be at the core of our members' financial lives, assisting everyone in managing their finances effectively. We pioneered student loan refinancing to tackle the primary financial challenge of a new generation with a modern approach to lending and personal finance. We have since broadened our range of products and services across lending, wealth management, and insurance. SoFi has experienced remarkable growth and has ambitious plans for the future, but to sustain this momentum, we need exceptional talent. And that begins with you.

Embark on an Engineering Voyage at Ivo!At Ivo, our engineers are the architects of innovation. We’ve made waves in the tech seas with groundbreaking creations:• An AI assistant within MS Word that edits documents seamlessly [2023]• Revolutionizing embeddings models by embracing agentic RAG [2023]• Large-scale legal fact extraction powered by LLMs [2024]• A legal assistant designed to navigate vast contract databases with pinpoint accuracy [2024]• Clustering legal documents from the same lineage [2025]• Automating deviation analysis to uncover hidden risks in extensive contract databases [2025]• Integrating contracts with amendments to create a time series of “composite” contracts that moved our clients to tears [2025]Your RoleYou’ll steer the ship in designing, creating, and deploying generative AI products. Your journey will include:• Crafting full stack generative AI capabilities• Delivering high-performance UI code and backend systems that reliably process and analyze millions of contracts• Designing pipelines that orchestrate LLMs, data extraction, and clustering algorithms at scale• Collaborating with designers, legal experts, and fellow engineers to reimagine the future of legal work in the age of AIOur MissionThe legal realm is filled with overburdened in-house teams, often facing grueling 80-hour weeks and relentless deadlines. Until now, technology has done little to alleviate this burden.With LLMs, we are on a mission to reclaim these lawyers' time, and here at Ivo, we aim to liberate them from the chains of laborious tasks.We are creating an AI-native platform designed to automate tedious legal processes. Our software is beloved by users, boasting a remarkable 85% trial win rate in a competitive marketplace. We’re genuinely transforming lives, and we are just getting started.

Senior Staff Software Engineer Location: Hybrid - Palo Alto Office on Tuesdays and Thursdays Make a Meaningful Impact At Midi Health, we're on a mission to transform women's healthcare. We are seeking a dynamic Senior Staff Fullstack Engineer who will act as a technical cornerstone within our Engineering Organization. As we expand, you will play a crucial role by translating intricate insights into cohesive technical blueprints and innovative products that drive our vision forward. Your Responsibilities Diagnose intricate technical challenges and spearhead architectural evaluations across diverse teams to mitigate technical debt, establish cross-service frameworks, and secure the long-term viability of Midi’s healthcare infrastructure. Function as a 'part-time product manager for technology', championing essential infrastructure enhancements that foster future operational agility. Design and develop outstanding, scalable, and adaptable products and code, striking a balance between execution speed and scalability. Influence engineering culture positively by promoting best practices for automated testing, CI/CD, and maintaining high-quality code across the entire stack. Assess high-level technical and business issues, architecting elegant and flexible solutions that consider long-term scalability and business expansion. Collaborate with Executive Leadership, Product, Marketing, and Clinical Stakeholders to uncover unmet customer and operational needs, translating business objectives into technical strategies that yield results for our patients and clinicians. Mentor senior and junior engineers through formal and informal channels, nurturing an environment of curiosity, humility, and technical excellence. About You You bring over 8 years of experience in building and scaling intricate engineering solutions, with a demonstrable history of leading large-scale architectural migrations in a startup setting. You have proven expertise in Django/DRF and React/Next.js. You are adept at navigating high-level abstractions, converting vague product and growth aspirations into tangible technical roadmaps. Your diverse background includes creating consumer-facing products alongside deep proficiency in architecting complex operational and workflow management systems. You are an advanced user of agentic coding tools and LLMs (e.g., Claude Code, GitHub Copilot) to expedite development and guide the team on high-leverage prompting and code auditing strategies.

Role Overview Pinterest is looking for a Senior Staff Software Engineer to join the Merchants team. This role focuses on building and improving features that support merchants and enhance the overall platform experience. What You Will Do Work closely with teams across engineering, product, and design to gather requirements and set technical direction. Design and implement scalable systems that support merchant needs and user engagement. Develop software solutions that help merchants connect with Pinterest users and grow their businesses. Contribute to the platform’s mission of inspiring creativity and discovery worldwide. Location This position is based in San Francisco, CA or Palo Alto, CA.

Waymo is at the forefront of autonomous driving technology, driven by the mission to become the world’s most trusted driver. Originating from the Google Self-Driving Car Project in 2009, Waymo has dedicated itself to developing the Waymo Driver—The World’s Most Experienced Driver™—to enhance mobility access while preventing traffic-related fatalities. Our Waymo Driver is the backbone of our fully autonomous ride-hail service and is adaptable across a variety of vehicle platforms and applications. To date, we have successfully completed over ten million rider-only trips, supported by our extensive experience of driving autonomously for more than 100 million miles on public roads and tens of billions of miles in simulation across over 15 U.S. states.The Driver Understanding and Evaluation team at Waymo focuses on deeply understanding the Waymo Driver’s behavior. With an impressive rate of over 1 million driverless miles per week, it is essential for Waymo to analyze and evaluate the behavior of its vehicles—both in real-world scenarios and simulations—using automated algorithms. Our learned metrics team plays a crucial role in leveraging machine learning to scale our operations to meet Waymo's ambitious goals. We work collaboratively across teams to integrate machine learning into production systems and establish the reward function for Waymo. Our team designs and manages large-scale machine learning systems, data infrastructures, simulation workflows, and analytical tools. By combining expert human insights with advanced machine learning models, we provide critical training and evaluation data for the Waymo Driver. We are on the lookout for passionate researchers and software engineers dedicated to creating robust machine learning systems for our autonomous vehicles, with a relentless pursuit of enhancing the performance of our technology stack.

About LightfieldLightfield is an innovative, AI-driven Customer Relationship Management (CRM) platform that seamlessly integrates your email, calendar, and meeting interactions. By capturing every communication, it transforms these interactions into organized insights, including accounts, tasks, follow-ups, and actionable intelligence, ensuring nothing falls through the cracks.We are revolutionizing CRM from the ground up. Rather than imposing rigid structures on teams, Lightfield learns from real-world workflows, adapting and automating processes while surfacing crucial insights that propel growth. Our goal is to build the CRM platform we've always dreamed of: fast, intelligent, and genuinely supportive.Supported by renowned investors such as Greylock, Lightspeed, and Coatue, our team includes experts who have previously developed Tome, a generative AI presentation tool utilized by over 25 million users. Our background also includes significant contributions to projects at Llama, Instagram, Facebook Messenger, Pinterest, Google, and Salesforce.About the RoleWe are in search of a seasoned Senior/Staff Software Engineer (5+ years of experience) who is product-oriented and excited to confront the challenges of developing highly scalable, high-performance, and robust features and systems that deliver cutting-edge AI product experiences. At Lightfield, engineers assume full ownership of projects from inception to impact, collaborating across various functions and pushing the boundaries of what's achievable in applied AI systems development. You will be working with a talented team to deliver industry-leading solutions and play a pivotal role in shaping the product and technical direction of Lightfield.What You Will DoPartner with product leaders to outline strategic initiatives, pinpoint key customer challenges, and translate requirements into technical execution.Design, build, and maintain intricate full-stack product features and systems, ensuring reliability, scalability, and high performance.Create observability and metrics to facilitate smooth operations, proactive issue identification, and ongoing enhancements.Lead technical design discussions, mentor colleagues at various levels, conduct comprehensive code reviews, and help establish engineering best practices and standards.Contribute to the development of a top-tier engineering team through recruitment, mentorship, and knowledge transfer.Who You Are5+ years of software development expertise, with a solid foundation in both front-end and back-end technologies.Proven experience in constructing large-scale, high-performance, and maintainable systems and products, utilizing modern programming languages and frameworks.