33 security software engineer jobs at 25 companies in Union, IL
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Software Engineer
Des Plaines, Illinois, United States
$90k-$150k/yr OnsiteFull Time
Bachelor's or Master's degree preferred; proficiency in Python, OOP, Linux (RHEL a plus); hardware/software troubleshooting; ability to obtain US security clearance (US citizenship required).
Python, Tkinter, JIRA, Confluence, BitBucket, C++, JavaScript, Linux, RHEL
1mo
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Senior Software Engineer
North Chicago, Illinois, United States
OnsiteFull Time
5+ YOEU.S. citizen able to obtain Secret clearance; Bachelor's in engineering/computer science; 5+ years software development for modeling and simulation; experience with Windows and Linux; proficiency in Assembly, C/C++, .NET, Java; CompTIA Security+ preferred.
Assembly, C, C++, Microsoft .Net, C#, VB, Java, Microsoft Windows, Windows 7, Windows 10, Windows Server 2008R2, Windows Server 2012R2, Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Linux
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Sr. Software Developer
Pleasant Prairie, Wisconsin, United States
$143k/yr OnsiteFull Time
5+ YOEBachelor's in Computer Engineering or related plus 5+ years progressive software development experience; experience with databases, web applications, software security, version control, scalable system design, SQL/NoSQL, Linux/Windows/Mobile/Web platforms, CI/CD, containerization, and cloud services.
Database software, SQL, NoSQL, Version Control Software, Linux, Windows, CI/CD, containerization, cloud services
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Senior Software Developer
Charlotte or Morrisville or Yellow Springs or Morton Grove
HybridFull Time
7+ YOE7+ years software engineering experience; strong Java and Spring Boot skills; CI/CD and SDLC practices; identity and security fundamentals (OAuth2/OIDC, JWT); experience with Keycloak/Okta/Auth0/Entra ID preferred; strong communication.
Java, Spring Boot, OAuth 2.0, OIDC, JWT, Keycloak, Okta, Auth0, Entra ID, Angular, React, PKCE, SAML 2.0, CI/CD, API gateway
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Lead Software Engineer
Downers Grove, Illinois, United States
$120k-$130k/yr HybridFull Time
8+ YOE8+ years Microsoft-stack software development, expertise in .NET (6/7/8), ASP.NET Core/MVC, Web API, EF Core, Azure services, Microsoft SQL Server, JavaScript/TypeScript and modern front-end (Angular/React); experience with CI/CD, observability, secure coding, and leading engineering delivery.
.NET 6/7/8, ASP.NET Core, Web API, Entity Framework Core, ASP.NET MVC, Angular, React, JavaScript, TypeScript, HTML5, CSS, Microsoft SQL Server, Azure, App Service, Functions, Azure SQL, Storage, Application Insights, Azure DevOps, GitHub Actions, CI/CD, API gateways
3mo
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Software Engineer, AI & Product Systems
Naperville, Illinois, United States
$80k-$150k/yr OnsiteFull Time
3+ YOE3+ years software engineering; Node.js/Next.js/TypeScript; PostgreSQL or Supabase; REST/OAuth2/JWT; AI/LLM integration; CI/CD; security and reliability.
Node.js, Next.js, TypeScript, PostgreSQL, Supabase, REST, OAuth2, JWT, WebSockets, GitHub Actions, Vercel, n8n, SOQL
2w
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Staff Software Engineer
Westchester or Chicago
$124k-$155k/yr HybridFull Time
8+ YOE8+ years iOS engineering experience with staff-level leadership, deep Swift/UIKit expertise, iOS architecture and security, CI/CD ownership, mobile integrations, and strong communication and mentoring skills.
Swift, UIKit, SwiftUI, Objective-C, .NET, GitHub Actions, Xcode Cloud, App Store Connect, TestFlight, APNs, Firebase Cloud Messaging, Braze, SFMC
1w
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Embedded Software Engineer
Schaumburg, Illinois, United States
$67k-$95k/yr OnsiteFull Time
BS/MS in related field, experience in embedded software, proficiency in C/C++/Python and Linux, U.S. citizenship with ability to obtain security clearance, strong communication and problem-solving skills.
Linux, C, C++, Python, Assembly, oscilloscope, logic analyzer, Git, JIRA, FPGA
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Sr. Software Engineer (Remote)
Oak Brook or Alabama or Arizona or Florida or Georgia or Iowa or Illinois or Indiana or Michigan or Minnesota or Missouri or North Carolina or Nebraska or Pennsylvania or South Carolina or Tennessee or Texas or Utah or Virginia or West Virginia
$107k-$137k/yr RemoteFull Time
5+ YOE5+ years software product development experience; expertise in .NET (C#), .NET Core, MS SQL/T-SQL; cloud, container, and Kubernetes experience; Agile SDLC, automated testing, security and compliance knowledge; Bachelor’s preferred.
.NET, C#, VB, .NET 4.8, .NET Core, C# 10, MS SQL Server T-SQL, SSIS, PowerShell, ActiveBatch, Azure DevOps, SonarQube, OCI, Docker, Kubernetes, Azure Container instances, App Service, OpenShift, GIT, REST, SOAP, Visual Studio Code
2mo
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Engineer Embedded Software
Rolling Meadows, Illinois, United States
$88k-$131k/yr OnsiteFull Time
2+ YOEBachelor's in CS/Electrical/Computer Engineering (or related STEM) with 2+ years experience (or Master's with 0+ years), C# experience, ability to obtain required US government security clearance (SAP/Secret), US citizenship, familiarity with EOIR test instruments and communication protocols.
C#, Visual Studio, Linux, GitHub, RS-232, RS-422/485, GPIB, TCP/IP, Oscilloscope, Signal Generator, Collimators, Black Bodies, Target Wheels, Power Meters
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Platform Software Engineer
Oak Brook, Illinois, United States
$160k-$170k/yr OnsiteFull Time
Proficiency in Python, REST API design, FastAPI and React, cloud deployment on Microsoft Azure, containerization (Docker/Kubernetes), MS SQL, Git, CI/CD and IaC (Terraform/Bicep/ARM), healthcare standards (EDI X12, HL7, FHIR) and HIPAA security.
Python, Selenium, OpenCV, FastAPI, React, RESTful APIs, EDI (X12), HL7 (v2/v3), FHIR (R4), Microsoft Azure, Microsoft App Services, Microsoft Azure Functions, Microsoft Logic Apps, Microsoft Azure SQL, Microsoft Key Vault, Microsoft Entra ID, Microsoft Azure Monitor, Microsoft Azure DevOps, GitHub Actions, Terraform, Bicep, ARM templates, Microsoft SQL Server, Docker, Kubernetes, Git, OCR, NLP, RBAC
4w
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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
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R&D SW Engineer
Pittsburgh or Plano or Durham or Lisle
$110k-$176k/yr OnsiteFull Time
8+ YOESenior mainframe software engineer with 8+ years z/OS development, mastery of REXX, SMF parsing, mainframe debugging tools, familiarity with network security protocols, and experience delivering production software.
z/OS, REXX, SMF, zERT, XDC, IPCS, SYSLOG, TLS, SSH, IPSEC, Assembler, Metal C, JCL, ISPF, CLIST, IBM C, RESTful API, ZOWE, Endevor, NetMaster, SOLVE, TCP/IP, RACF, ACF2, Top Secret
4d
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2027 Software Engineer Program - Full-Time - United States - July Start
Chicago or Columbus or Houston or Jersey City or New York City or Palo Alto or Plano or Tampa or Wilmington
$81k-$95k/yr OnsiteFull Time
Must be pursuing or have a Bachelor's or 5th-year Master's in CS/IT/Data Science/AI or related, graduate by June 2027, authorized to work in the U.S., able to write secure code and use automation and AI-assisted tools.
HackerRank
1w
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AI Solutions Developer
Wheeling, Illinois, United States
$125k/yr OnsiteFull Time
3+ YOEBachelor's or equivalent, 3+ years software/cloud/AI engineering, experience with LLMs, AWS, backend integrations, secure engineering practices, and client-facing documentation.
LLM, AWS, AWS CDK, TypeScript, Node.js, Pydantic, Zod, SQL, SWL, REST API, DynamoDB, VPC, Lambda, CloudWatch, X-Ray, S3, SES, EventBridge, Python, Microsoft SQL Server
2mo
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AI Solutions Engineer
Burr Ridge, Illinois, United States
$80k-$140k/yr HybridFull Time
3+ YOEBachelor's degree in engineering/computer science/data science, 3+ years in software development, data science, or AI/ML, production AI architecture experience (RAG, agents), CI/CD and IaC, Azure cloud engineering preferred, security and sensitive-data handling, stakeholder engagement.
MCP (Model Context Protocol), RAG, CI/CD, infrastructure-as-code, Claude Code, Cursor, Microsoft 365 (M365), Microsoft Azure, Microsoft Container Apps, Microsoft Functions, Microsoft App Service, Microsoft Key Vault, Microsoft App Insights, Microsoft Entra ID, AWS, GCP
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Senior Web/App Engineer
Janesville, Wisconsin, United States
$118k-$142k/yr OnsiteFull Time
5+ YOE5+ years software development experience; proficiency in Java, C#, Python, JavaScript; strong system architecture, design patterns, data modeling, cloud and application security knowledge; bachelor's in CS/Engineering preferred; experience with SaaS platforms (Adobe, Oracle) preferred.
Java, C#, Python, JavaScript, Adobe, Oracle
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Principal/Sr. Principal Systems Engineer (Integration & Test)
Rolling Meadows, Illinois, United States
$109k-$197k/yr OnsiteFull Time
5+ YOEU.S. citizen with active government security clearance (Secret; SAP). BS/MS/PhD in engineering with relevant years of experience (Principal: ~5+ yrs; Sr Principal: ~8+ yrs). Experience troubleshooting hardware/software/firmware, integration & test, and working collaboratively.
DOORS, Verification Cross Reference Matrices (VCRMs), Model Based Systems Engineering (MBSE), Cameo, MATLAB, C, C++, Java, Python
2mo
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Cloud Developer – GNOS Platform (Glenview, IL)
Glenview or Chicago
$95k-$125k/yr OnsiteFull Time
3+ YOE3-5 years backend/platform experience; Azure cloud; REST APIs; CI/CD; Git workflows; secure, reliable designs.
Microsoft Azure, REST APIs, CI/CD, GitHub, Terraform, API Management, Azure SQL, Cosmos DB, Service Bus
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Sr. Engineer, Cybersecurity - Threat Response
Bellevue or Overland Park or Downers Grove
$103k-$186k/yr OnsiteFull Time
4+ YOEBachelor's in CS/IT plus ~5 years (or advanced degree plus ~3 years); 4-7 years in security software, project leadership, network information security, and incident response; experience with SIEM, EDR, SOAR, forensics and scripting.
Axiom, KAPE, EnCase, X-Ways, Cellebrite, MITRE ATT&CK, Cyber Kill Chain, NIST/SANS Incident Handling, SOAR, SIEM, IDS/IPS, EDR, Python, Perl, Shell, HTML, PHP
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