Top Principal Engineer Jobs in Chicago, IL

Develops and leads digital twin assurance capabilities, evaluating model credibility, data quality, connected systems, AI-enabled methods, and lifecycle governance. Applies modeling and simulation, verification and validation, uncertainty quantification, and engineering standards to support credible customer decisions. Establishes repeatable assurance practices, advises customers, contributes to proposals, and represents UL Solutions in standards groups and industry forums. Collaborates across engineering, software, cybersecurity, data science, certification, and business teams.

Lead global digital manufacturing transformation by defining roadmap, architecting analytics and AI solutions, integrating MES/SCADA/PLCs with cloud, developing predictive maintenance and anomaly-detection models, driving OEE and quality improvements, enforcing data governance, and scaling Industry 4.0 capabilities across sites.

Provides technical leadership for real-time RF sensor software development, integration, testing, and validation. Designs high-performance C/C++ systems, integrates signal-processing algorithms, debugs distributed and multithreaded applications, and transitions MATLAB/Python prototypes into production software. The role includes technical mentoring, customer and government stakeholder engagement, proposal development, documentation, system demonstrations, visualization tools, and approximately 10% travel for integration and field-testing activities.

Owns company-critical, long-term technical problems across multiple teams and organizations. Defines technical strategy, architectures, roadmaps, and engineering standards for large-scale customer-facing systems. Remains hands-on in software development while driving AI adoption in products and engineering workflows. Partners with senior product, engineering, and executive leaders to resolve complex problems, improve reliability and performance, and shape Dropbox’s technical direction.

Build and own Arcadia’s internal developer platform across a large-scale data lakehouse and Kubernetes applications. Develop self-service APIs, templates, golden paths, CI/CD capabilities, observability, security controls, and reliability practices. Lead platform migrations, improve developer experience, manage stakeholder needs and costs, set technical direction, and coach senior engineers. The role requires hands-on software development alongside expertise in cloud infrastructure, Kubernetes, networking, infrastructure as code, SLOs, incident response, and platform product management.

Principal Software Engineer responsible for designing scalable software frameworks, developing secure production code, reviewing and debugging implementations, and advancing cloud-native engineering practices. Leads adoption of agentic AI development workflows with governance for validation, auditability, security, resiliency, and sensitive-data handling. Serves as a technical subject matter expert, advises cross-functional teams, influences senior stakeholders, and delivers reusable solutions across the organization.

Lead the design, development, and implementation of low-latency brokerage systems, mentor engineering teams, and ensure high performance of trading applications.

Lead the architecture and technical direction of Forward Financing’s core fintech platform. Design scalable distributed backend systems, guide cross-team initiatives, establish engineering best practices, resolve incidents, and mentor engineers. The role owns the technical roadmap and architectural vision while partnering across teams to improve reliability, observability, code quality, and delivery. Ruby on Rails expertise is required, along with strong communication, influence, agile development experience, and a broad backend or full-stack perspective.

Leads architecture and development of SailPoint’s large-scale, multi-tenant identity security SaaS platform. Translates business strategy into technical roadmaps, designs reliable microservices and infrastructure, drives modernization from monoliths to distributed systems, mentors engineers, reviews designs, delivers code, and communicates technology strategy to executives and stakeholders. The role also requires adoption and oversight of AI-assisted engineering tools and technologies.

Lead the architecture and development of high-throughput streaming infrastructure processing over one million messages per second with sub-second latency. Responsibilities include scaling real-time computation, improving caching, designing message deduplication, enabling zero-downtime deployments, delivering customer-focused projects, shaping the technical roadmap, and mentoring engineers.

Own complex software initiatives across requirements, architecture, implementation, and delivery for iManage’s core cloud platform. Design scalable cloud-native systems using Java, microservices, and event-driven architectures. Partner with product and engineering teams, apply AI tools in development, communicate technical direction, and mentor engineers. The role requires hands-on development, architectural judgment, database and Linux experience, and familiarity with CI/CD, Docker, and Kubernetes.

The Principal Engineer will lead the design and delivery of core platform capabilities, focusing on scalable systems, AI application, and mentoring engineers while driving architectural decisions and improving operational systems.

Lead principal for CFD and physics-based simulation focusing on CFD, fire/explosion, refrigerant leakage, battery thermal runaway, combustion, multiphase flows, and electronics cooling. Own V&V strategy and model credibility, enforce ASME/NASA/Oberkampf & Roy best practices, drive test-to-simulation correlation, mentor engineers, produce technical reports for certification, and guide global teams on validated modeling approaches for safety-critical applications.

Develop and maintain certification requirements for gas and vapor detection products; lead standards participation; create training and guidance; handle new/innovative product reviews; initiate certification requirement changes and coordinate with Operations; represent UL Solutions in technical forums and provide subject-matter expertise.

Leads global engineering standards, testing, and certification programs for advanced data center cooling technologies. Serves as a regional or global SME, develops test methods and equipment, performs complex thermal and fluid testing, and represents the organization in industry standards activities. Responsibilities include cold plate and immersion cooling validation, heat reuse certification, refrigerant and dielectric compatibility assessments, leak detection integration, regulatory alignment, client issue resolution, technical publications, continuous improvement, and workforce training.

Leads the engineering strategy and technical delivery for the GMI Next Gen program, migrating a legacy back-office platform. Responsibilities include solution architecture, complex feature design, technology stack definition, test strategy, integration, non-functional requirements, SDLC governance, vendor coordination, and technical oversight across teams. The role requires extensive GMI, Futures and Options Clearing, and migration experience, along with leadership of technical delivery teams and collaboration with program managers and vendors.

Leads engineering for AI development platforms, Builder Tools, governed agent infrastructure, and production agentic systems. Defines architectural standards, technical vision, software development lifecycles, and process improvements; oversees design reviews and complex codebase changes across scrum teams. Collaborates with infrastructure, database, frontend, and architecture teams, mentors engineers, and communicates strategy and roadmaps to leadership. Builds scalable, reliable software using Microsoft technologies and related cloud, database, version control, and messaging systems.

Provide technical direction for GitLab Dedicated, a managed single-tenant SaaS platform. Lead architecture and transformation across resilience, failover, tenant orchestration, change management, automation, and platform integrations. Identify systemic reliability and scalability risks, establish reusable platform patterns, strengthen service ownership, and guide cross-team technical decisions. Mentor senior engineers and advance engineering excellence across the organization.

Designs and develops internet-scale data processing, infrastructure management, and observability platforms across cloud and on-premises environments. Establishes engineering standards, resolves complex distributed architecture challenges, and provides technical leadership across the organization. The role requires experience with large-scale orchestration systems, internet protocols such as DNS, WHOIS, and RDAP, architectural trade-offs, and internet security technologies.

Serve as a global SME for Industrial Metaverse technologies (PLCs, IoT, cloud/edge, digital twins, AI, EMC/RED, cybersecurity). Lead standards work, develop test programs, perform and supervise complex testing, train staff, represent UL externally, and support clients and continuous improvement across regional or global labs.

Leads RF manufacturing test station development, validation, production support, design-for-manufacturability improvements, troubleshooting, continuous improvement, and project reporting for EOIR products. Coordinates with engineering, production, quality, and project teams to resolve manufacturing issues, reduce defects and costs, and improve cycle time. Requires RF test equipment expertise, hardware and software troubleshooting, project leadership, U.S. citizenship, and ability to obtain a Secret clearance.

Provides department-wide technical direction for k0rdent across Kubernetes, AI infrastructure, AI applications, and observability. Designs cross-cutting systems, establishes engineering standards, resolves architectural risks, mentors Staff and Principal engineers, and aligns product strategy with durable technical execution. The role also engages customers, partners, upstream communities, and industry forums while contributing code and prototypes to solve complex infrastructure problems.

Leads enterprise-wide quality engineering and test automation architecture across Humana. Designs scalable frameworks for web, mobile, API, integration, and end-to-end testing; integrates automation with CI/CD and DevOps platforms; establishes governance, standards, traceability, and quality gates; and mentors engineering teams. The role also drives AI-enabled testing, including test generation, self-healing automation, defect prediction, and intelligent execution, while advising stakeholders on modernization and enterprise transformation.

Leads enterprise-wide quality engineering and automation strategy, designing scalable test frameworks, reusable automation platforms, CI/CD integrations, and AI-powered testing capabilities. Establishes standards, architectures, and best practices while supporting web, mobile, API, microservices, cloud-native, and distributed applications. Provides technical mentorship, partners with engineering and DevOps teams, improves testing effectiveness and reliability, and drives adoption of intelligent automation, predictive quality analytics, and continuous testing practices.

Designs, integrates, tests, troubleshoots, and deploys RF, microwave, electronic warfare, and digital subsystem technologies. Responsibilities include hardware and system integration, RF performance analysis, FPGA and embedded processor design, root-cause analysis, production transition, technical documentation, supplier and customer support, test readiness reviews, and technical leadership of junior RF engineers.