Top Principal Engineer Jobs in Chicago, IL

Serve as the senior technical authority for enterprise supply‑chain integrations and agentic AI workflows. Architect and build data pipelines, microservices, APIs, and LLM-powered automation; own POCs to production, define reusable integration standards, support pre-sales, mentor engineers, and drive platform roadmap and customer outcomes across ERP/OMS/WMS/TMS ecosystems.

Lead architecture, build, and operate customer-facing analytics platform: design ELT and metric governance, implement low-latency serving (OLAP), ensure reliability/performance, mentor engineers, partner with product, and use AI coding tools to accelerate development.

Lead design and optimization of low-observable aircraft features, perform electromagnetic signature modeling and simulation, direct RCS testing and validation, partner with materials and multidisciplinary teams to mature RAM and coatings, translate threats into survivability features, and support program assessments and milestone decisions.

Lead design and prototyping of generative AI experiences for autonomy development; drive UX for Hivemind products; perform user research, collaborate with CTO and product leads, and deliver reference implementations and integrations across full-stack web and edge systems.

Lead design and prototype of generative AI experiences to accelerate autonomy development; drive UX for Hivemind Generative AI; collaborate with CTO and Hivemind product leads; conduct user research and competitive analysis; build prototypes and reference implementations that integrate with web and mission-planning systems.

Design, implement, and deploy safety-critical navigation and state estimation systems for aerospace platforms. Develop EKF and GNSS/INS integration, multi-sensor fusion for GPS-denied environments, FDIR and integrity monitoring, and V&V test plans. Support certification, requirements allocation, performance analysis, flight test evaluation, and provide technical leadership and mentoring.

The Principal Engineer will lead the engineering team in building systems across full stack, improving development efficiency, and expanding products in new markets.

Technical leader responsible for architecting and building high-performance POS payment integrations. Drive platform-level technical strategy, develop Kotlin/JVM services, integrate hardware SDKs and EMV card payments, ensure security/key management, observability, and API design, mentor engineers, and collaborate across teams to deliver scalable, mission-critical payment solutions.

Lead the engineering architecture for an AI-driven product, focusing on system design, collaborating with AI agents, and ensuring quality and scalability in large-scale SaaS environments.

The Director, AI Solutions Architect leads the development of scalable AI solutions, ensuring quality and compliance while collaborating with cross-functional teams.

The Principal Software Engineer will design and optimize backend applications/services, improve payment integration, and oversee code quality within AWS.

The Principal Developer Productivity Engineer will enhance GM's developer tools, mentor engineers, and drive system performance through observability and software engineering best practices.

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.

Design, build, test, and deploy intelligent automation workflows and cognitive solutions. Optimize processes using RPA, ML/AI integrations, create monitoring/analytics, define standards, mentor junior staff, and manage risks and escalations.

Lead design and implementation of enterprise automated test frameworks across web, mobile, and API platforms. Build and run complex automated and exploratory test suites, integrate tests into CI/CD pipelines, monitor application health, validate integrations and CMS workflows, mentor junior QA, and drive QA strategy for high-scale AWS environments.

Design, evolve, and optimize Scala-based, low-latency trading services. Lead architecture for scalability and performance, tune JVM/Akka systems, enhance observability, ensure security and regulatory compliance, and mentor junior engineers while collaborating cross-functionally to support 24x7 high-volume trading.

Responsible for ensuring security and integrity in technology operations, providing expertise in security engineering, and collaborating with teams to embed security measures in API design and deployment.

Lead and sustain continuous improvement initiatives in manufacturing: run cross-functional CI projects, facilitate root cause analyses and kaizens, perform forecasting and simulation for production ramp, drive labor efficiency and standard work, and support Six Sigma training and certification.

The Principal Engineer will lead API development and integration projects, design architectures, ensure API security and performance, and mentor team members, primarily focusing on IBM technologies.

Develop and maintain Python data pipelines and pipeline code to build business data objects. Implement source-to-target mappings, CI/CD pipelines, unit and integration testing, and resolve complex technical problems. Interpret design requirements, ensure high software quality, deploy solutions, and mentor team members while contributing across functional lines.

The Security Engineering Manager safeguards technology by enforcing security policies, managing incident responses, monitoring threats, and reporting on security incidents. Must collaborate across IT and business functions, ensuring compliance and conducting training.

The Principal Consulting Engineer will implement and support IP-based call center solutions, guide project strategies, and provide technical leadership while collaborating with clients and stakeholders to achieve project goals.

Own and modernize Upsides analytics data platform: migrate pipelines, reduce cost, improve governance, design reusable modeling/orchestration patterns, deliver domain-critical data products, lead cross-functional initiatives, mentor engineers, and support ML and product teams.

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 design and delivery of flight-critical power electronics for the X-BAT aircraft, including inverters, DC-DC converters, and battery management. Own full hardware development cycle, drive PCB layout, harden designs for harsh environments, mentor engineers, lead reviews, and manage program timelines through production.