Top Principal Engineer Jobs in Chicago, IL

Lead architecture and implementation of manufacturing acceptance test software for EO/IR LRUs and system-level testing. Collaborate with IPT to capture requirements, integrate, validate, and release test software, develop test documentation and procedures, review product testability, and support production troubleshooting in a fast-paced manufacturing environment. On-site role requiring US citizenship and required government clearance.

Develop, integrate, and validate manufacturing test software for RF production hardware. Lead test station and fixture development, create and maintain acceptance and environmental screening procedures, troubleshoot hardware/software/firmware issues, collaborate with cross-functional teams, and support continuous improvement to meet production and contractual test requirements.

Lead enterprise platform strategy and architecture for cloud, data, and AI platforms (Fabric, Databricks, Synapse, OpenAI/Foundry). Own platform lifecycle, establish standards and guardrails, drive modernization and cost optimization, influence governance, mentor senior engineers, and partner with executives to translate strategy into platform capabilities.

Provide technical leadership for cross-functional teams, create and communicate technical vision and strategy, lead new initiatives without defined procedures, remove roadblocks, resolve issues, mentor engineers, and perform related duties. Remote role based in Canada; GM does not provide immigration sponsorship.

Lead development of core client systems and engine-level infrastructure in Unity/C#. Diagnose and fix cross-cutting performance issues, upgrade third-party SDKs, evolve build tooling, produce design docs, scope multi-week infrastructure initiatives, mentor engineers, and drive profiling, optimization, and architecture changes to enable future features.

Lead architecture, modernization, and development of Group Insurance applications. Modernize mainframe monoliths into Java microservices and micro-frontends on cloud, mentor distributed Agile teams, collaborate with enterprise architecture, product owners and infrastructure, and enable test automation and integrations. Approximately 10% domestic travel.

Lead photolithography process engineering and team for wafer fabrication. Responsibilities include optimizing processes, troubleshooting, and collaborating on tech development.

The Engineering Director will lead and manage the cloud infrastructure and developer enablement, focusing on AI-native systems, team development, and security operations.

As a Senior+ Engineer, you will lead the design and architecture of impactful open-source projects while mentoring teams, coding, and engaging with the community.

The Client Engine Software Engineer will design and implement complex client-side engines using advanced algorithms, focusing on high-performance and fault-tolerance in a remote team environment.

The Principal Engineer for Customer Quality acts as the key customer contact for quality issues, addressing complaints, and driving continuous improvement. This role requires collaboration with multiple teams to establish quality standards and facilitate customer audits, while managing quality performance and supporting product lifecycle decisions.

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.

Technical individual contributor and hands-on leader responsible for architecting cross-border money movement and digital asset settlement systems, resolving scalability and security challenges, mentoring engineers, shaping product and technical strategy, and ensuring resilient, compliant payment platforms across teams.

Serve as the technical expert for manufacturing automation and controls across engineering and project teams. Develop control system solutions, support FEL estimates and capital projects, perform technology evaluations, lead system integration, support FAT/SAT, create functional control descriptions and technical briefs, and identify continuous improvement and feasibility opportunities. Maintain industry standards and drive long-term automation roadmaps.

Build Quince’s greenfield, AI-native supply chain planning platform from architecture through production. Own forecasting and optimization model pipelines, experimentation, deployment, monitoring, operator tooling, integrations, and AI-augmented workflows. Partner with scientists, planners, business leaders, and distributed engineering teams to translate supply chain needs into scalable systems. Set technical direction, establish engineering standards, and recruit and develop a high-performing team.

Lead manufacturing/test engineering for EO-IR LITENING targeting pods. Support CCA troubleshooting, develop NRE test stations, drive manufacturability improvements, lead continuous improvement and corrective actions, present project status to executives, and coordinate cross-functional efforts to reduce cost, cycle time, and defects.

Lead design, implementation, testing, and maintenance of mobile and web software. Build APIs and web applications, author documentation, create prototypes, perform code reviews, collaborate with designers and QA, support releases and post-release maintenance, mentor peers, and provide technical input for project estimates and sales.

Lead long-term technical strategy and execution across multiple teams, architecting and evolving foundational frontend/backend systems and platforms at massive scale. Drive AI/ML adoption, solve ambiguous, high-impact problems, remain hands-on in critical system design and implementation, and align senior leaders on roadmaps and engineering standards.

Lead strategic design and technical delivery for large-scale VMware Cloud Foundation programs. Develop high- and low-level designs for complex multi-site environments, plan hybrid-cloud integrations and migrations, define security and compliance standards, create reference architectures, support customer and executive engagements, resolve escalations, and mentor senior engineers. The role requires deep VMware expertise across vSphere, vSAN, NSX, and Aria, with training provided for broader VCF specialization.

Leads New Jersey environmental investigation, remediation, compliance, and engineering projects while growing an established client book. Serves as a senior technical leader and seller-doer, overseeing proposals, pricing, project delivery, financials, regulatory coordination, technical reports, remedy evaluation, and client relationships. Provides technical oversight, mentors staff, supports recruiting, and partners with an LSRP on NJDEP alignment and project strategy.

Senior, client-facing principal to grow New Jersey land remediation practice. Responsibilities include business development, leading complex site investigation/remediation projects, technical oversight and review, NJDEP regulatory coordination with LSRP, project financial and staff management, mentoring staff, and promoting practice growth and technical excellence.

The Staff/Principal Engineer will lead AI-assisted engineering efforts, architect solutions using C#, React, and Python, and drive MLOps initiatives while mentoring senior engineers in a healthcare technology context.

The Principal Engineer will guide architectural strategy, solve complex technical challenges, mentor engineers, and ensure compliance with healthcare standards.

Own cross-team, platform-level engineering initiatives end-to-end: architecture, migrations, observability, on-call, and customer outcomes. Drive AI-native tooling and agentic AI adoption, mentor senior engineers, and set technical standards across teams.

Develop and direct system-level test plans, procedures, and schedules for space hardware; coordinate integrated testing and calibration activities; manage calibrated equipment records and shipping; support sanitization and security/transportation plans; travel up to 25%.