Principal Security Field Engineer Jobs

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Infra team. This globally-distributed team of experienced engineers focuses on delivering a robust and feature-rich search experience, including contributing to improving the search experience in Lucene. This is a principle software engineering role that entails using your vast knowledge in this space in order to define, direct, and build the next generation of Elasticsearch capabilities. This role provides technical vision and direction for Elasticsearch’s core search infrastructure, including indexing, retrieval, and relevance, and requires deep expertise in search internals and cross-team collaboration. Our company is distributed by intention. We hire the best engineers we can find wherever they are, whoever they are. We collaborate across continents every day over email, GitHub, Zoom, and Slack. At our best, we write fast, scalable and intuitive software. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements. What You Will Be Doing: As a full-time Elasticsearch contributor, you will define, lead, and contribute to the evolution of core search and indexing capabilities. You’ll research advances in search infrastructure,

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Infra team. This globally-distributed team of experienced engineers focuses on delivering a robust and feature-rich search experience, including contributing to improving the search experience in Lucene. This is a principle software engineering role that entails using your vast knowledge in this space in order to define, direct, and build the next generation of Elasticsearch capabilities. This role provides technical vision and direction for Elasticsearch’s core search infrastructure, including indexing, retrieval, and relevance, and requires deep expertise in search internals and cross-team collaboration. Our company is distributed by intention. We hire the best engineers we can find wherever they are, whoever they are. We collaborate across continents every day over email, GitHub, Zoom, and Slack. At our best, we write fast, scalable and intuitive software. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements. What You Will Be Doing: As a full-time Elasticsearch contributor, you will define, lead, and contribute to the evolution of core search and indexing capabilities. You’ll research advances in search infrastructure,

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Infra team. This globally-distributed team of experienced engineers focuses on delivering a robust and feature-rich search experience, including contributing to improving the search experience in Lucene. This is a principle software engineering role that entails using your vast knowledge in this space in order to define, direct, and build the next generation of Elasticsearch capabilities. This role provides technical vision and direction for Elasticsearch’s core search infrastructure, including indexing, retrieval, and relevance, and requires deep expertise in search internals and cross-team collaboration. Our company is distributed by intention. We hire the best engineers we can find wherever they are, whoever they are. We collaborate across continents every day over email, GitHub, Zoom, and Slack. At our best, we write fast, scalable and intuitive software. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements. What You Will Be Doing: As a full-time Elasticsearch contributor, you will define, lead, and contribute to the evolution of core search and indexing capabilities. You’ll research advances in search infrastructure,

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role: We're looking for a Principal Software Engineer to join the Elasticsearch - Search Infra team. This globally-distributed team of experienced engineers focuses on delivering a robust and feature-rich search experience, including contributing to improving the search experience in Lucene. This is a principle software engineering role that entails using your vast knowledge in this space in order to define, direct, and build the next generation of Elasticsearch capabilities. This role provides technical vision and direction for Elasticsearch’s core search infrastructure, including indexing, retrieval, and relevance, and requires deep expertise in search internals and cross-team collaboration. Our company is distributed by intention. We hire the best engineers we can find wherever they are, whoever they are. We collaborate across continents every day over email, GitHub, Zoom, and Slack. At our best, we write fast, scalable and intuitive software. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements. What You Will Be Doing: As a full-time Elasticsearch contributor, you will define, lead, and contribute to the evolution of core search and indexing capabilities. You’ll research advances in search infrastructure,

CAPCO POLAND *We're looking for Poland-based candidates. The role is hybrid and requires working from the office in Warsaw. Capco Poland is a global technology and management consultancy specializing in driving digital transformation across the financial services industry. We are passionate about helping our clients succeed in an ever-changing industry. We are also: Experts in banking and payments, capital markets and wealth and asset management Committed to growing our business and hiring the best talent to help us get there Focused on maintaining our nimble, agile and entrepreneurial culture Shape complex data programmes and help financial institutions turn data strategy into practical, scalable transformation. The Role As a Senior Lead Consultant / Principal Data Advisor at Capco, you will play a key role in leading complex, large-scale data programmes for clients across banking and financial services. You will work closely with senior management, Steering Committees, Business, IT, Security, and Data Owners to provide strategic direction and support critical architectural and organisational decisions. Combining practical expertise across data governance, architecture, and transformation, you will help clients build robust data capabilities and translate strategic objectives into effective delivery. What You’ll Do Lead and provide strategic direction across large-scale data programmes within banking and financial services. Advise senior management and Steering Committees on data strategy, governance, architecture, and transformation. Facilitate complex discussions and build alignment between Business, IT, Security, Data Owners, and other key stakeholders. Guide architectural and organisational decisions across data warehouses, data platforms, and lakehouse solutions. Assess architectural and technical recommendations, including solutions using GCP and BigQuery, to support scalable and effective delivery. What We're looking for Extensive experience in leading large

For more than 30 years, SonicWall has delivered a partner-first unified cybersecurity portfolio that helps SMBs, MSPs, and IT teams consolidate network security, endpoint security, security service edge (SSE), and threat response across hybrid environments. By bringing connected technology, real-time threat intelligence, automation, and expert services together, SonicWall helps organizations simplify security operations, achieve better security outcomes, and lower total cost of ownership. Backed by a global ecosystem of more than 17,000 partners, SonicWall delivers enterprise-grade protection built for SMB and mid-market realities. For more information, visit www.sonicwall.com or follow us on X, LinkedIn , Facebook , and Instagram . Role Overview We are seeking a highly skilled and visionary Senior Principal Engineer to lead the architecture, design, and development of our next-generation Enterprise Wireless Access Point (AP) solutions. In this role, you will define the software architecture for state-of-the-art Wi-Fi 6, 6E, and Wi-Fi 7 access points. You will bridge the gap between low-level silicon firmware and high-level cloud management platforms, ensuring our APs deliver enterprise-grade performance, seamless roaming, high security, and cloud-driven scalability. If you have deep expertise in embedded Linux, 802.11 protocols, and cloud-managed networking, we want you on our team. Key Responsibilities Technical Leadership & Architecture End-to-End Architecture: Own the software architecture, design, and delivery of advanced Wi-Fi features from silicon SDK integration up to cloud-managed provisioning systems. Enterprise Wi-Fi Evolution: Design and develop advanced features utilizing Wi-Fi 6, Wi-Fi 6E, and Wi-Fi 7 standards to deliver enterprise-grade performance. Advanced Wireless Feature Design: Architect and implement high-value wireless application features including Wi-Fi Mesh, Neighbor Awareness Networking (NAN),

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role The Principal Certification & Airworthiness Engineer serves as the independent technical authority responsible for ensuring the safety, regulatory compliance, and airworthiness of the company’s flight systems and munition payload integrations. This role owns the certification strategy, safety case, and release-to-flight authority, ensuring designs meet applicable military and civil airworthiness standards. This position will also advise on munitions safety and weapon system cybersecurity evaluation methods to ensure both test range accessibility and operational use are approved by the appropriate entities. You will act as a liaison between Mach Industries and the Department of War (DoW) for certification and developmental/risk reduction tests initiatives. Key Responsibilities Airworthiness Authority Serve as the independent airworthiness authority for flight systems and payload integrations. Define certification strategies and compliance plans aligned with MIL-HDBK-516, FAA/EASA regulations, and relevant DoW airworthiness requirements. Lead development and approval of airworthiness documentation including certification plans, compliance reports, and safety assessments. Interface with government airworthiness authorities and mission partners

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Principal Product Specialist for the Zero Trust Browser team to join our team. This is an On-site, Hybrid, or Remote (within the USA, available Eastern time) role, reporting to the Director, Product Management in the Product Management department. You will provide technical leadership for Zscaler’s Zero Trust Browser solutions, owning product success throughout the sales lifecycle. You will serve as a thought leader for browser-layer security architecture and strategy while partnering with sales and engineering to drive technical wins and product enhancements for our Zero Trust Browser offerings. What you’ll do (Role Expectations) Provide technical leadership for Zscaler’s Zero Trust Browser solutions, owning product success and architectural strategy throughout the sales lifecycle Lead in-person and virtual meetings with customer executives and practitioners to provide executive-level overviews of

Zscaler (NASDAQ: ZS) accelerates digital transformation so customers can be more agile, efficient, resilient, and secure. The Zscaler Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location. Distributed across 200+ public data centers globally and thousands of private sites at the edge, the SASE-based Zero Trust Exchange is the world’s largest in-line cloud security platform. We believe the future of work is Human + AI and are building an AI-native enterprise where human potential is amplified by machine intelligence to solve the world’s hardest security challenges. Driven by deep customer obsession, we are committed to the mission, outcome, and to each other. We bring these commitments to life through three core behaviors: ownership and collaboration, trust through outcomes and impact, and a challenge culture with ongoing feedback. Ready to make an impact at the company pioneering security transformation in the AI era? Join us at Zscaler. Role We are looking for a Principal Software Engineer (C / Networking / Dataplane) to join our Engineering Team. This is a Hybrid (San Jose, CA 3 days a week in office) role, reporting to the Senior Director, Software Development Engineering. The Principal Software Engineer (C / Networking / Dataplane) will design and implement high-performance data path features for load balancing and L7 protocols, directly enhancing the scalability and security of global networking infrastructure. By leveraging deep C programming expertise and autonomous ownership, they will drive complex architectural projects from initial concept to large-scale deployment. What you’ll do (Role Expectations) Design and implement Datapath features related to Load Balancer, Firewall rules and L7 Protocol implementations Apply deep knowledge of C programming, data structures, and algorithms to build high-performance systems Independently drive moderately co

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role We are seeking a Principal Systems Engineer to lead the use of modeling and simulation throughout the aircraft design process. This person will develop integrated aircraft-level simulations, evaluate design alternatives, and translate analysis into clear engineering decisions. The role requires close collaboration with the aerodynamics, structures, propulsion, electrical, controls, and vehicle systems teams. The ideal candidate combines strong technical depth in aircraft simulation with the leadership and communication skills needed to drive multidisciplinary design decisions. Key Responsibilities Own the architecture, development, and validation of integrated aircraft simulations. Use simulation to guide aircraft configuration, subsystem sizing, requirements, and design trade studies. Integrate aerodynamic, structural, propulsion, electrical, mass-properties, controls, and mission-performance models. Lead multidisciplinary design optimization and sensitivity analyses. Quantify design margins, uncertainty, risk, and system-level impacts of proposed changes. Define simulation fidelity requirements appropriate to each phase of development. Establish model verification, validation, configuration-management, and documen

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role Mach Industries is seeking a Principal GNC Engineer to define, develop, and flight-prove the GNC architecture for autonomous aircraft and related defense platforms. You will own system-level technical decisions across guidance, navigation, flight controls, modeling and simulation, embedded implementation, and flight test. This is a hands-on technical leadership role. You will solve the program’s hardest problems, establish engineering rigor, and guide multidisciplinary teams from early vehicle design through flight qualification and deployment. The ideal candidate combines deep flight-vehicle expertise with strong software judgment, decisive technical leadership, and a record of fielding reliable systems. Key Responsibilities Own the end-to-end GNC architecture and technical roadmap across all mission phases, from launch or takeoff through terminal operations, recovery, or landing. Translate mission objectives and vehicle concepts into GNC requirements, interfaces, performance budgets, and verification criteria. Design, analyze, and mature guidance algorithms, control laws, state-estimation solutions, gain schedules, and control-allocation strategies. Ensure robust performance across the full operating envelope while accounting for aerodynamic u

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role Mach Industries is seeking a Principal Automation Engineer, Controls to own the architecture, development, and deployment of our factory controls platform. You will establish Beckhoff TwinCAT as Mach's standardized controls platform, personally develop automation equipment for pilot production lines, and scale those architectures through external systems integrators executing $20M+ capital equipment programs. This is a hands-on technical leadership role. You will be expected to move between defining controls architecture and standards, writing and debugging production code, reviewing integrator designs, commissioning equipment on the factory floor, and solving problems during production ramp. Your ownership extends from initial controls architecture through FAT, installation, commissioning, and Run at Rate. Key Responsibilities Own Mach's factory controls architecture and technical roadmap, standardized around Beckhoff TwinCAT. Define standards for PLC software, Beckhoff IPCs, EtherCAT I/O, motion control, industrial networks, machine safety, diagnostics, and factory interfaces. Develop reusable TwinCAT software libraries, machine state models, fault handling, recovery strategies, and programming standards. Own controls and functional-safety arc

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role Mach Industries is seeking a Principal Manufacturing Engineer, Energetics to lead the development and industrialization of manufacturing systems for solid rocket motors (SRMs), pyrotechnics, and energetic products. This role will have end-to-end technical ownership of energetic manufacturing capability, from early manufacturing concepts and process architecture through facility buildout, equipment integration, commissioning, qualification, and production launch. You will define how energetic products are manufactured at scale: translating product and process requirements into manufacturing cells, production lines, hazardous-process facilities, equipment specifications, controls architectures, material flows, and commissioning plans. This is a highly cross-functional role requiring coordination across product engineering, manufacturing, automation, facilities, EHS, quality, operations, external A/E firms, equipment OEMs, and systems integrators. The ideal candidate has personally taken complex manufacturing systems from concept through production and is comfortable operating as the technical DRI for large, multidisciplinary capital projects. Key Responsibilities Manufacturing System & Line Design Own the manufacturing architecture for solid r

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role The Principal Software Engineer will play a pivotal leadership role in developing and advancing our autonomous defense systems. You will drive the architecture, design, implementation, and optimization of mission-critical software, with deep focus on real-time performance, reliability, security, and scalability. This senior position demands exceptional technical expertise, strategic thinking, and strong ownership as you lead complex initiatives across the full software stack - from low-level firmware to high-level mission systems - in a fast-paced, high-stakes environment. Key Responsibilities Lead the design, development, testing, and maintenance of software for autonomous defense platforms, ensuring world-class performance, reliability, and security. Architect and implement high-performance, well-tested systems in C++, Rust, Python, or C, setting technical direction for real-time and embedded applications. Define and own end-to-end software architecture, spanning low-level firmware through high-level mission software and edge computing solutions. Collaborate closely with embedded engineers, GNC specialists, systems engineers, and cross-functional teams to deliver seamless hardware-software integration and system-level optimization. Drive perfo

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role: We're looking for a Principal Software Developer to join the Elasticsearch - Analytical Engine team. This expert team of engineers is responsible for building new analytics capabilities in Elasticsearch’s completely new compute engine, and accessed via our new piped query language called ES|QL . This is a principle software engineering role that entails using your vast knowledge in this space in order to define, direct, and build the next generation of ES|QL capabilities. This role includes providing technical vision and direction for the customer/user interfaces and for the underlying language syntax and compute infrastructure. This role requires related past technical experience in addition to the ability to work cross-organization. Our company is distributed by intention. We hire the best engineers we can find wherever they are, whoever they are. We collaborate across continents every day over email, GitHub, Zoom, and Slack. At our best, we write fast, scalable, and intuitive software. We believe that the best way to do that is to empower individual engineers, code review every change, decide big things by consensus, and strive for incremental improvements. What You Will Be Doing: As a full-time Elasticsearch contributor, you will define, lead, and contribute to the development of data-intensive enhancements. You’ll research