Design And Cost Estimation Head in United States

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 Lovable , 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 recently raised a $355M Series C at a $4.65B valuation, led by General Catalyst and Redpoint Ventures. We've crossed $300M+ ARR and grown fivefold since September. Our team includes creators of popular open-source projects (e.g., Seaborn , Luig i ), academic researchers, international olympiad medalists, and experienced engineering and product leaders with decades of experience. The Role: We're looking for a Detection & Response Engineer to build the systems that help us identify, investigate, and respond to threats across our platform. This is an engineering role focused on automation. You'll build detections, investigation tooling, and response capabilities that scale with our infrastructure, using AI where it meaningfully improves signal, investigation speed, and operational effectiveness. You'll work closely with infrastructure, platform, and security engineers to ensure every incident makes the platform more resilient. What You'll Work On: Detection Engineering Design and build high-fidelity detections for attacks, abuse, and anomalous behavior across our infrastructure and production systems Continuously improve detections based on telemetry, threat intelligence, and lessons learned from incidents Improve visibility across cloud infrastruc

Replit is the agentic software creation platform that enables anyone to build applications using natural language. With millions of users worldwide, Replit is democratizing software development by removing traditional barriers to application creation. Role Summary Replit is the agentic software creation platform that enables anyone to build applications using natural language. With millions of users worldwide, Replit is democratizing software development by removing traditional barriers to application creation. As a Disputes and Chargeback Program Manager at Replit, you’ll be part of our Trust and Safety Operations team, who owns customer-facing workflows that handle sensitive and policy-driven interactions across the Support organization. This includes areas such as privacy requests, DMCA and intellectual property claims, law enforcement requests, and abuse appeals. You'll own Replit's disputes and chargeback function end-to-end: from the individual case in front of you to the policies, playbooks, and automation that let it hold up as we scale to millions of users. This role combines strategic ownership with hands-on execution: you'll determine dispute and chargeback strategy, and build the systems that make those decisions repeatable at scale, working closely with Engineering, Legal and Finance. In this role you will… Own the full dispute lifecycle: investigate incoming chargebacks and disputes, decide whether and how to represent, gather evidence, and respond within network deadlines. Design and maintain the policies, decision trees, and SOPs that govern how disputes and chargebacks are handled. Define the key metrics, health targets, and goals for the disputes program and track performance against them, reporting to leadership. Monitor chargeback rates and dispute trends to identify the underlying drivers of volume, and partner with Engineering and Finance to address root causes. Partner with Engineering and Support Operations to automate manual parts of the wor

About the Team OpenAI, in close collaboration with our capital partners, is embarking on a journey to build the world’s most advanced AI infrastructure ecosystem. This team is central to this mission, setting the core infra strategy and implementing this vision. From site selection to the buildout process, this team sits at the intersection of commercial, technical, strategy, and operations, interacting with teams and executives inside and outside of OpenAI. About the Role We are seeking experienced Data Center Mechanical and Electrical/Power Design Engineers with expertise in designing, operating, and maintaining large-scale data center campuses. The ideal candidate for this role will have extensive background and experience in design and managing critical equipment and facilities, design and operation of MEP (Mechanical, Electrical, Plumbing) systems, and overseeing operational activities from initial phases of Data Center build through delivery and ongoing maintenance. The ideal candidate will have a strong technical background, operational leadership experience, and a proven ability to collaborate with external vendors on critical infrastructure. This role offers the opportunity to lead transformative data center projects with high visibility and impact. If you are passionate about delivering cutting-edge infrastructure solutions, we encourage you to apply. Key Responsibilities Oversee building and MEP design, operation, and maintenance, including reviewing building and MEP drawings and proposals across all project phases. Lead operational activities for large-scale data center campuses, from early design phases through delivery and daily operation. Operate and maintain critical data center facilities and equipment, ensuring reliability and performance. Collaborate with external vendors to select, procure, and manage critical equipment, such as generators, UPS, chillers, and CDUs. Provide technical expertise on all aspects of data center building, equipment, and

About the Team Our Robotics team is focused on unlocking general-purpose robotics and pushing towards AGI-level intelligence in dynamic, real-world settings. Working across the entire model stack, we integrate cutting-edge hardware and software to explore a broad range of robotic form factors. We strive to seamlessly blend high-level AI capabilities with the constraints of physical systems to improve peoples’ lives. About the Role We are seeking a Mechanical Engineer to lead the engineering, characterization, and productionization of flexible and compliant components in robotic platforms. You will partner closely with cross-functional teams to translate material concepts into engineered subsystems that meet functional, durability, and manufacturing requirements. This role focuses on understanding how soft materials behave in dynamic mechanical systems — including fatigue, creep, hysteresis, wear, and environmental degradation — and designing assemblies that perform consistently at scale. You will work with materials such as elastomers, foams, thermoplastic polyurethanes (TPUs), engineered fabrics, knitted and woven textiles, cables, and other flexible load-bearing or transmission elements, integrating them with rigid hardware, sensors, and actuators using fabrication methods such as bonding, molding, lamination, and sewn assemblies. This role is based in San Francisco, CA, and requires in-person presence 4 days a week. In this role, you will Design and integrate compliant or flexible materials into mechanical subsystems and rigid hardware interfaces. Leverage FEA tools to characterize material behavior under operational loads, including tension, compression, abrasion, fatigue, and environmental exposure. Develop test methods and validation protocols to evaluate durability, performance, and failure modes of soft components. Collaborate with cross-functional teams to transition early prototypes into manufacturable designs. Source and evaluate materials in collaboratio

Wire Harness Design Engineer (Associate, Experienced or Lead) Company: The Boeing Company Boeing Defense, Space, & Security (BDS) is looking for a Wire Harness Design Engineer (Associate, Experienced or Lead) to join our team in Oklahoma City, OK . This position will provide engineering support across the Boeing portfolio of products, to include – but not limited to – Boeing Military Aircraft and Military Derivative Aircraft (AEW&C, AWACS, C-32/C-40, E-4B, VC-25A, KC-767, B-1B, B-2, B-52 and others). Our teams are currently hiring for a broad range of experience levels including Associate, Experienced, or Lead level Engineers. Associate (Level 2) Develops and maintains cable/wire harness detail and assembly design Supports analysis and design reviews Develops and maintains electrical product detail, assembly and installation designs (e.g., equipment racks, power panels, cable routing and geometry, antennas) Provides engineering design disposition on discrepancies (e.g., rejection tags, production action requests, shop revision requests) Follows documented processes, specifications and procedures that support the design and manufacture of electrical commodities Supports the development of statements of work. Assists in the technical review of supplier capabilities to facilitate source selection Analyzes functional and physical input used in the development of integrated design and system architecture. Works under general supervision. Experienced (Level 3) <

Job Details: Job Description: About the Role Join a team developing next-generation CPU cores that power client, server, IoT, and AI platforms. As a Senior Physical Design Engineer (CPU), you will play a key role in delivering high-performance, power-efficient silicon solutions. You will take ownership of blocks within the CPU core design, driving implementation from RTL to GDS and contributing to advanced physical design methodologies. What You’ll Do Key responsibilities will include but not limited to: Own physical design and implementation of CPU core blocks or subsystems Execute synthesis, floorplanning, place and route, and design closure Perform static timing analysis (STA), power analysis, and physical verification Drive convergence of timing, power, and area (PPA) metrics Debug and resolve complex design issues across multiple design stages Develop and optimize design flows and automation scripts Collaborate cross-functionally with RTL design, verification, clocking, and full-chip teams Contribute to improving design methodologies and best practices Provide guidance to junior engineers where applicable Behavioral traits that we are looking for: Strong problem-solving and analytical thinking Takes ownership and accountability for deliverables Collaborates effectively across multidisciplinary teams Communicates technical concepts clearly and concisely Prioritizes work effectively in a fast-paced environment Continuously learns and applies new tools and methodologies Why Join Us Work on cutting-edge CPU core designs that power client, server, IoT, and AI platforms used worldwide Be part of

Early Career Mechanical Design Engineer Company: The Boeing Company Boeing Test & Evaluation (BT&E) is looking for an Early Career Mechanical Design Engineer to support the Environmental Test Design Engineering team in Berkeley, MO. The primary focus of this position is to support St. Louis Environmental Lab testing for local Boeing Defense & Space (BDS) programs. The design team works in partnership with the lab test teams to provide the designs and hardware needed to complete testing. Test capabilities within the Environmental labs include vibrational/structural dynamics, acoustic, airflow systems, fuel flow systems, high temperature flow impingement, and environmental control chambers, where temperature, humidity, and pressure are varied. Mechanical Design Engineers on the team design and modify test articles, fixtures, and support structures that integrate with our lab facilities. Design work ranges from adapters and fixtures to full test rigs and complete aircraft subsystems with their support structures. Responsibilities include designing interfaces to facility infrastructure such as supplied pressure, heating/cooling, power, hydraulics, and a full suite of instrumentation. Design Engineers support fabrication, installation, connection, and acceptance/check-out to deliver test-ready hardware. Boeing St. Louis is building the future ‒ creating innovative solutions that will define the next generation of aerospace. As part of this team, you will have the opportunity to work on the latest military aircraft and weapons programs such as T-7A, F-15, F/A-18, MQ-25, JDAM, SDB, in addition to Phantom Works proprietary efforts. Position Responsibilities: Develop mechanical design criteria from

NVIDIA has been transforming computer graphics, PC gaming, and accelerated computing for more than 25 years. It’s a unique legacy of innovation that’s fueled by great technology—and amazing people. Today, we’re tapping into the unlimited potential of AI to define the next era of computing. An era in which our GPU acts as the brains of computers, robots, and self-driving cars that can understand the world. Doing what’s never been done before takes vision, innovation, and the world’s best talent. As a NVIDIAN, you’ll be immersed in a diverse, supportive environment where everyone is inspired to do their best work. Come join the team and see how you can make a lasting impact on the world. Silicon Co-Design Group (SCG) is a wide-ranging, multi-functional, integral team at NVIDIA. We sit at the crossroads of design, architecture, marketing, operations, and productization. Our contributions span from the arch stage and extend to defining final products. We architect innovative solutions for Datacenter, Server, Gaming, Robotics, Automotive, and Embedded markets. We are fast-paced, dynamic, share a sense of humor, and collaborate extensively to push the boundaries of what is possible. We do all of this with an eye on making groundbreaking, impactful market disruptions! We are seeking an experienced Senior Manager to lead Product Co-Design and Verification in areas of Speed, Reliability and Power Compliance. You will oversee speed/timing/reliability system design, Simulation-to-Silicon power/speed verification, features for product compliance and test chip development crating future product roadmaps. The ideal candidate will have deep technical expertise in semiconductor/VLSI design and a background in translating product requirements into design and vice versa. This is a highly visible, multi-functional role to produce outstanding products that ship at SOL and meet the high NVIDIA quality we demand and customers expect. <p

ABOUT BASETEN Baseten powers mission-critical inference for the world's most dynamic AI companies, like Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma, and Writer. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production. We're growing quickly and recently raised our $1.5B Series F , led by Altimeter Capital, Conviction Partners, and Spark Capital. Join us and help build the platform engineers turn to ship AI products. THE ROLE The largest, most demanding enterprises run on Baseten, and they bring exacting requirements for how people, services, and agents access the platform. This is the founding role for our identity and authorization team within enterprise engineering. You'll own the identity and access layer of the Baseten platform: the authorization model, credential systems, and admin experiences that enterprise IT teams use to govern access for organizations like Harvey, HubSpot, and Notion. You'll design and build Baseten's fine-grained authorization system from the ground up to support the workflows customers depend on today while giving them cleaner, more precise ways to manage access as the platform grows. Authorization at Baseten requires low-latency permission checks at high request volume, consistent contracts and behaviors across the product suite, and strong security guarantees for mission-critical, highly regulated workloads. EXAMPLE INITIATIVES Recent and upcoming work in this area: Fine-grained authorization for users, service accounts, and agentic workloads: per-resource permissions at the organization, team, and workload scope to support both common workflows and complex enterprise access policies Programmatic authentication allowing high-compliance customers to connect service principles securely via short-lived, workload-based credentials Agent credentials that grant an agent exactly the access it needs for the gi

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. About the role: As a Principal Security Engineer on the Detection and Response (D&R) team at Roblox, you'll play a key role designing and developing effective custom security data pipeline systems, detection strategies and automations for response workflows to defend our critical assets from threat actors. You will also lead real-time incident response, actively investigate events and analyze threat actor techniques to prioritize emerging threats to ensure Roblox is equipped to mitigate and react to critical challenges. You will play a vital part to ensure the safety of our community and enterprise by proactively fostering a high-performing, inclusive security culture. This is a hybrid in-office role. You Will: Be a D&R authority! You will deliver robust detection & response capabilities: build new threat detection systems (keeping false positives low) while also automating processes with scripts, playbooks and orchestration tooling. Implement ETL pipelines : Design and develop customized data processing pipelines. Conduct security operations : Actively monitor security events and participate in on-call rotations to lead real-time incident response to contain and mitigate potent

Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: The Community Support org handles tens of millions of interactions yearly, engaging with Airbnb customers by phone, messaging, chat, or social media channels. The group handles hundreds of issues across categories including Cancellations, Account Issues, Refunds, Payments, Reservations, Extenuating Circumstances, Booking & Listing issues, Safety & Claims. The organization is globally distributed with offices in San Francisco, Dublin, Montreal, Seattle, Singapore, Manila, Gurgaon and an extensive partner network serving all regions. The Difference You Will Make: In this role you will own the strategic design and continuous evolution of risk frameworks, the risk registry, and executive risk narratives for Community Support — translating investigative findings, AI/ML model outputs, operational signals, and emerging threats into decisions and actions that protect Airbnb. A defining element of this role is your close partnership with the Insider Threat program. Together, you will form a complementary unit: you will ensure that investigative outcomes are contextualized within the broader risk ecosystem — informing risk appetite decisions, shaping detection strategy, and driving remediation accountability. You will co-own escalation frameworks, jointly challenge detection model effectiveness, and ensure that the feedback loop between investigations, risk governance, and AI-driven detection is robust and continuously improving. Beyond analysis and governance design, you will serve as the program manager for systemic root cause resolution — ensuring that when investigations, incident

Who We Are Notion is the collaborative AI workspace where teams and agents think together . We're building one place where your knowledge, projects, meetings, and AI tools live side by side, so work is faster, clearer, and less fragmented. Millions of individuals, small teams, and large companies run their work on Notion. Notinos (our employees) are customer zero in bringing this future of work to life. We care about craft, building things that last, and the belief that great work is still fundamentally human. Our goal isn’t to ship the next feature. Each and every team of Notinos is working to set the standard for how humans work together in the AI era. From building a business’s system of record to making and managing AI agents to automating away the busy work, we care deeply about giving our customers more time for their life’s work. About The Role Millions of people rely on Notion to do their most important work, and protecting that trust is foundational to everything we build. We’re looking for a hands-on Detection Engineer to build and operate the systems and workflows we use to detect and respond to attacks across Notion’s cloud-native environment. You’ll ship high-signal detections, improve the platform that powers them, participate in incident response, and help shape how detection and response engineering scales at Notion. You’ll work closely with Engineering, Corporate Security, and Infrastructure, with broad latitude to identify gaps, prioritize investments, and build what’s needed next. We view detection and response as a software engineering discipline: detections are code, platforms are products, and measurement matters What You'll Achieve Design and maintain high-signal detections across cloud, identity, endpoints, and SaaS environments. Build and improve the detection platform, including rule lifecycle management, tuning, measurement, and rollout safety. Develop tooling and automation that accelerate triage, enrichment, investigation, and detection

Experienced or Senior Digital CCA Design Company: The Boeing Company Boeing Defense, Space & Security (BDS) seeks a Digital CCA Design Engineer who is a subject matter expert in high-speed digital circuit design , signal integrity analysis , and electrical design to join our time in Huntsville, AL. This position will p lay a vital role in the Patriot Advanced Capability-3 (PAC-3) program, one of the world's most advanced air and missile defense systems. This is your opportunity to work in a dynamic environment where your skills will directly contribute to protecting critical assets and ensuring mission success. If you are passionate about defense technology and want to make a real impact, we want to hear from you! Position Responsibilities: Focus on electrical design, simulation, verification, and validation testing of high-speed printed circuit board design and electronic system Lead product development cycles Collaborate with cross-functional teams, including other engineering disciplines Keeping current on related industry best practices and technological advancements This position requires obtaining a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim U.S. secret clearance Pre Start and final U.S. secret clearance Post Start is required. Basic Qualifications (Required Skills/Experience): Bachelor of Science degree in Engineering (with a focus in Electrical, Mechanical or Aeronautical), Computer Science, Data Science, Mathematics, Physics, Chemistry or non-US equivalent qualifications directly related to the work statement. 3 or more years of related experien

Java Software Engineer - Developer (Experienced and Senior) Company: The Boeing Company The Boeing Company is currently seeking Java Software Engineers – Developer (Experienced and Senior) to support our Advanced Ground Architecture team located in Herndon, Virginia, Colorado Springs, Colorado, Mesa, Arizona, Seal Beach, California and El Segundo, California. This position will focus on supporting the Boeing Defense, Space & Security (BDS) Software Engineering organization. The Advanced Ground Architecture (AGA) software team is a dynamic group of software engineers creating the future of Ground support with the extensibility and adaptability to be used across ALL Boeing programs. The software team is executing this vision through modern software technologies (Java, ReactJS, python, CI/CD pipelines) and methodologies (Scaled Agile). AGA is looking for self-motivated high performers to execute the large scope of Java development needed for the program's vision. The ideal candidates will provide software engineering functions for the design, development, and maintenance of complex, multi-tiered application software systems used to support the command and control of space vehicles. The software engineers will work day-to-day with system and test engineers in order to implement, test, and document new features and improvements for both web services and applications supporting distributed computing solutions. Position Responsibilities: Designs, develops, tests, and maintains software in an Agile execution that meets industry, customer, safety, and regulation standards throughout the end-to-end lifecycle Reviews, analyzes, and translates customer requirements into initial design and softwa

Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators. At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device. We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there. A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone. As a Sr. Studio Software Engineer for Roblox Studio Platform, you will be a key contributor to the evolution of Roblox Studio, the primary IDE for making massive multiplayer online games on the Roblox platform. Studio provides the mission-critical tools for 3D modeling, animation, and the complete SDLC for millions of developers. We are looking for engineers who thrive on an adventure into the unknown and have experience across various systems, Operating Systems, Game Engines, and Application Frameworks. You’ll tackle projects involving: Core User Features: Architecting application frameworks, windowing systems, and code generation. “AI Native” Features: Pioneering scalable systems that extend to complex, agentic use cases. Foundational Architecture: Driving OS integration, extensibility, and customizability at the deepest levels. Central Backend Systems: Engineering the infrastructure to power a consistent, high-performance UX. Design Evolution: Collaborating with UX designers to translate Studio into a modern, consistent design language. You Will: Design and execute the technical direction to drive the future extensibility and adaptability of the application. Own and deliver complex techn