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Sr Full Stack Engineer Jobs in Illinois (NOW HIRING)

Humana

Lead Full Stack Engineer

Chicago, IL · On-site

You will combine full-stack engineering, GenAI/LLM expertise, developer enablement, and SDLC ... as a senior developer in large IT projects * 2 or more years of project leadership experience

Humana

Lead Full Stack Engineer

Chicago, IL · On-site

You will combine full-stack engineering, GenAI/LLM expertise, developer enablement, and SDLC ... as a senior developer in large IT projects * 2 or more years of project leadership experience

Humana

Lead Full Stack Engineer

Chicago, IL · On-site

You will combine full-stack engineering, GenAI/LLM expertise, developer enablement, and SDLC ... as a senior developer in large IT projects * 2 or more years of project leadership experience

Datadelivers

Full Stack Engineer

Schaumburg, IL · On-site

$80 - $100/hr

The Full Stack Engineer works alongside other developers on the Product Strategy & Technology (PST) team to build, maintain, and improve DataDelivers' core CDP product. This role owns feature ...

Huntington

Senior Full Stack Developer

Chicago, IL · On-site +1

$70K - $140K/yr

Senior Full Stack Developer - In this senior role, the successful candidate will Design, Develop, Integrate, and Support Process Automation API development. Duties and Responsibilities: * Architect ...

Huntington

Senior Full Stack Developer

Chicago, IL · On-site +1

$70K - $140K/yr

Senior Full Stack Developer - In this senior role, the successful candidate will Design, Develop, Integrate, and Support Process Automation API development. Duties and Responsibilities: Architect ...

Huntington

Senior Full Stack Developer

Chicago, IL · On-site +1

$70K - $140K/yr

Senior Full Stack Developer - In this senior role, the successful candidate will Design, Develop, Integrate, and Support Process Automation API development. Duties and Responsibilities: * Architect ...

1 point system

Python Full Stack Engineer

Chicago, IL · On-site

Role Overview We are seeking an experienced Senior Full Stack Software Engineer to lead development efforts and contribute to the architecture and design of scalable applications. The ideal candidate ...

Spruce Infotech

Fullstack Developers (Sr)

Chicago, IL · On-site

Senior Full Stack Developer Job Summary Seeking a Senior Full Stack Developer to support a client in the insurance industry located in the western Chicago suburbs. This is a 9-month contract ...

Harbor Trusted Partnership

Full Stack Engineer

Chicago, IL · Hybrid

$160K - $180K/yr

Summary We are hiring a Full Stack Engineer to build production applications, APIs, leveraging the existing application platform and frameworks, together with the cutting-edge AI framework (Agentic ...

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Showing results 41-60

All JobsSr Full Stack Engineer JobsSr Full Stack Engineer Jobs in Illinois

Sr Full Stack Engineer information

See Illinois salary details

$43.1K

$130.6K

$184.6K

How much do sr full stack engineer jobs pay per year?

As of Sep 8, 2026, the average yearly pay for sr full stack engineer in Illinois is $130,596.00, according to ZipRecruiter salary data. Most workers in this role earn between $107,600.00 and $153,100.00 per year, depending on experience, location, and employer.

What is a Sr Full Stack Engineer?

Sr Full Stack Engineers are experienced software developers who are proficient in both front-end and back-end technologies. They design, build, and maintain complete web applications, handling everything from the user interface to the server-side logic and database management. In addition to coding, they often lead projects, mentor junior engineers, and make key architectural decisions. Their expertise allows them to work across the entire technology stack, enabling seamless integration and efficient problem-solving.

What are the key skills and qualifications needed to thrive as a Sr Full Stack Engineer?

To thrive as a Sr Full Stack Engineer, you need advanced proficiency in both front-end and back-end development, with expertise in languages such as JavaScript, Python, or Java, as well as a strong understanding of software architecture and system design. Familiarity with frameworks like React, Angular, or Node.js, experience with cloud platforms (AWS, Azure), and knowledge of CI/CD pipelines are commonly required, along with relevant certifications like AWS Certified Developer. Standout soft skills include problem-solving, effective communication, and leadership abilities for mentoring teams and collaborating across departments. These skills and qualities are essential to deliver scalable, maintainable solutions and drive successful project outcomes in dynamic development environments.

How does a Sr Full Stack Engineer typically collaborate with cross-functional teams within a tech organization?

As a Sr Full Stack Engineer, you will regularly collaborate with product managers, UX/UI designers, QA testers, and other engineers to deliver end-to-end solutions. This role often involves participating in sprint planning, code reviews, and architecture discussions to ensure alignment across frontend and backend development. Effective communication and problem-solving skills are key, as you'll be responsible for translating business requirements into technical specifications and guiding less experienced developers. Your input will also help shape technical roadmaps and influence product direction.

How much do senior full stack engineers make?

Senior full stack engineers typically earn between $100,000 and $160,000 annually, depending on experience, location, and company size. They often possess skills in multiple programming languages, frameworks, and tools like JavaScript, Python, and cloud platforms, which can influence salary levels.

What cities in Illinois are hiring for Sr Full Stack Engineer jobs?

Cities in Illinois with the most Sr Full Stack Engineer job openings:

Sr Full Stack Engineer jobs near you
Infographic showing various Sr Full Stack Engineer job openings in Illinois as of August 2026, with employment types broken down into 95% Full Time, 2% Part Time, and 3% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution, with an average salary of $130,596 per year, or $62.8 per hour.

Senior Full Stack Developer (.NET AI Focused)

Tech Tammina LLC

Hoffman Estates, IL • On-site

Contractor

Re-posted 21 days ago

Job description

Role: Senior Full Stack Developer (.NET AI Focused)

Location: Hoffman Estates, IL (Hybrid)

Duration: 3-6 months

Rate: Market

Required Qualifications

  • Strong full-stack development experience (.NET C# + ReactJS)
  • Demonstrated advanced proficiency with GitHub Copilot in enterprise development environments
  • Experience using AI tools for code optimization, debugging, and refactoring
  • Experience working within containerized environments (Kubernetes)
  • Strong understanding of distributed systems and event-driven architectures

Core Responsibilities

  • Lead AI-assisted refactoring of .NET C# microservices
  • Develop and enhance ReactJS front-end components aligned with backend improvements
  • Leverage GitHub Copilot (advanced usage required) and Claude Code to accelerate development tasks
  • Evaluate AI-generated code for quality, security, and architectural alignment
  • Collaborate with QA (automation with AI) and DevOps/Infrastructure (Kubernetes, Kafka) resources
  • Conduct performance benchmarking and outcome validation
  • Identify opportunities to apply AI to improve existing development workflows
  • Troubleshoot complex distributed system issues across services and infrastructure

Technical Environment

  • .NET C# Microservices Architecture
  • ReactJS
  • On-Premises Kubernetes (K8S)
  • Kafka
  • PostgreSQL
  • Redis
  • Apache Druid
  • ELK Stack
  • AI Coding Tools: GitHub Copilot (critical), Claude Code

Preferred Qualifications

  • Experience designing AI-assisted development workflows
  • Background supporting infrastructure modernization initiatives
  • Exposure to automation frameworks utilizing AI