36 principal software engineer jobs at 11 companies in Union, IL
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Principal/Sr. Principal Software Engineer
Rolling Meadows, Illinois, United States
$109k-$163k/yr OnsiteFull Time
5+ YOEBachelor's in CS/CE or equivalent experience, 5+ years engineering experience (Principal) or 8+ years (Sr Principal). Proficiency in C++, embedded Linux/VxWorks, scripting (Python/Bash), version control (Git/GitLab/GitHub/Bitbucket/ClearCase), Agile/Waterfall; U.S. citizenship and active Secret clearance required.
C++, C++11, Python, Bash, Batch, Linux, VxWorks, Waterfall Methodology, Agile, Git, GitLab, GitHub, Bitbucket, ClearCase, Rally, Jira, DevSecOps, Model-based Engineering
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Principal/Sr. Principal Software Engineer
Rolling Meadows, Illinois, United States
$109k-$163k/yr OnsiteFull Time
5+ YOEUS citizen with active Secret clearance and SAP access; Bachelor’s in CS/CE (or equivalent experience). 5+ years engineering experience (Principal) or 8+ years (Sr Principal). Must have C++, embedded Linux or VxWorks, scripting (Python/Bash), version control (Git/GitLab/GitHub/ClearCase), and Agile/Waterfall experience.
C++, C++11, Python, Bash, Batch, Linux, VxWorks, Git, GitLab, GitHub, Bitbucket, ClearCase, Rally, Jira, Model-based Engineering, DevSecOps, Agile, Waterfall Methodology
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Principal Software Engineer
Downers Grove or Willingboro
$140k-$180k/yr OnsiteFull Time
15+ YOE15+ years software engineering with enterprise architecture, cloud (Azure) modernization, microservices, eCommerce, AI/LLM production experience, and strong people mentoring and technical leadership.
React.js, Next.js, TypeScript, C#, .NET Core, Java, Python, Go, Kafka, Azure Service Bus, Event Hub, Cloudflare, Akamai, Azure Front Door, SQL Server, PostgreSQL, Redis, Cosmos DB, MongoDB, AKS, Azure App Service, Azure Functions, Azure SQL, Key Vault, Azure AD/Entra ID, Azure Monitor, Terraform, Bicep, Azure DevOps, GitHub Actions, Helm, Open Telemetry, Application Insights, Jaeger, Grafana, Prometheus, k6, JMeter, Azure Load Testing, Pinecone, Weaviate, pgvector, OpenAI, Anthropic, Gemini, LangChain, LangGraph, CrewAI, Playwright, Cypress, Pact, OAuth 2.0, OpenID Connect, Azure Data Factory, Azure Databricks
2w
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Principal Engineer, Software Engineering
Rockford, Illinois, United States
$135k-$205k/yr OnsiteFull Time
8+ YOEBachelor's in CS/EE/EElec and 8+ years (or Master's and 5+ years); 5+ years embedded C; 3+ years DO-178C; software for generator/bus power control; authorized to work in U.S. without sponsorship.
embedded C, DO-178C
2d
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Principal Software Engineer, Core Services
Wayne or Naperville
$160k-$185k/yr HybridFull Time
10+ YOE10+ years software engineering experience, bachelor’s in CS or equivalent, deep TypeScript/Node.js skills, cloud-native and distributed systems experience, leadership and mentoring experience.
TypeScript, Node.js, NestJS, EC2, Lambda, S3, SNS, SQS, Docker, Kafka, React, Kubernetes, GitHub Copilot, Claude Code, OpenAI Codex
4d
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Principal Software Engineer
Rosemont, Illinois, United States
$200k/yr HybridFull Time
5+ YOEBachelor's in CS or related plus 5 years (or Master's plus 3),3+ years Salesforce and Lightning Web Components, Apex, Git, Visual Studio Code, HTML/CSS/JavaScript, Agile/DevOps experience, strong communication and design skills.
Salesforce CRM, Lightning Web Components, APEX, Git, Visual Studio Code, HTML, CSS, JavaScript, Agile
2mo
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Engineer, Principal
Naperville, Illinois, United States
$109k-$159k/yr OnsiteFull Time
7+ YOE7+ years of software architecture/engineering experience; cloud and DevOps focus; strong leadership in architecture decisions.
CSharp, Python, Angular, SQL, AWS, Azure, GCP, CI/CD tooling
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Engineer, Principal
Naperville, Illinois, United States
$109k-$159k/yr OnsiteFull Time
7+ YOE7+ years in software development; expertise in C#, Python, Angular, SQL; cloud platforms (AWS/Azure/GCP); architecture and platform engineering; CI/CD; bachelor’s degree preferred or equivalent coding education.
C#, Python, Angular, SQL, AWS, Azure, GCP, CI/CD, Version Control, Cloud Platforms
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Principal Software Engineer
Westchester, Illinois, United States
$171k-$257k/yr RemoteFull Time
12+ YOESenior/principal-level data engineer with deep Azure BI/data stack expertise (Microsoft Fabric, Synapse, Power BI), expert Python and SQL, architecture and platform design, and strong communication and mentoring skills.
Microsoft Fabric, Azure Synapse Analytics, Power BI, Azure, Python, SQL
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Principal AI Engineer - Aerospace & Defense
Itasca, Illinois, United States
$15k-$180k/yr FieldFull Time
Hands-on experience building and shipping production AI and mobile solutions, expertise in prompt engineering, RAG, MLOps, forward-deployed integrations, full-lifecycle engineering, and technical leadership at principal level.
Retrieval-augmented generation (RAG), MLOps, CI/CD, iOS, ERP, CRM, IoT
3w
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Principal Agentic AI Security Engineer
North Chicago, Illinois, United States
$142k-$269k/yr HybridFull Time
4+ YOEExtensive cybersecurity and security-engineering experience, strong software engineering with Python, experience building agentic AI systems, and ability to develop technical standards and guidance.
Python, LangChain, AutoGen, MCP, Claude Code, Cursor, GitHub Copilot, Aider, SIEM, EDR, SOAR
1w
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Principal Piping Engineer - ASME Section III, Class 1
Kennesaw or Kennewick or Plano or Fort Worth or Naperville or Glendale or Overland Park or Baton Rouge or Palm Beach Gardens or Englewood or Charlotte
$150k-$180k/yr OnsiteFull Time
15+ YOEBachelor's in Mechanical/Civil, 15+ years pipe stress and mechanical piping design experience, ASME Section III Class 1 fatigue experience, PE license, ANSYS and pipe stress software experience, nuclear industry knowledge.
AutoPIPE, ME 101, Peps PIPESTRESS, Caesar II, Tpipe, NuPipe, SuperPipe, ADL Pipe, Microsoft Suite, ANSYS
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Principal Piping Engineer - ASME Section III, Class 1
Kennesaw or Kennewick or Plano or Fort Worth or Naperville or Glendale or Overland Park or Baton Rouge or Palm Beach Gardens or Englewood or Charlotte
$150k-$180k/yr OnsiteFull Time
15+ YOEBachelor's in Mechanical/Civil Eng, PE license,15+ years piping design and ASME Section III Class 1 experience, pipe stress analysis expertise, ANSYS and pipe-analysis software familiarity, strong communication and leadership.
AutoPIPE, ME 101, Peps, PIPESTRESS, Caesar II, Tpipe, NuPipe, SuperPipe, ADL PipePro, Microsoft Suite, ANSYS
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Principal AI Architect - Remote
Lombard, Illinois, United States
$125k-$170k/yr RemoteFull Time
10+ YOE10+ years in software engineering and enterprise architecture; proven production AI/ML and Generative AI delivery; expertise in LLMs, RAG, embeddings, vector DBs, agents; Python; cloud (Azure); DevOps, CI/CD, containerization, Kubernetes; Terraform/Bicep; AI governance and privacy.
Python, Microsoft Azure, Terraform, Bicep, Kubernetes, LLMs, RAG
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