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Senior 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 JobsFull Stack Engineer JobsSenior Full Stack Engineer JobsSenior Full Stack Engineer Jobs in Illinois

Senior Full Stack Engineer information

See Illinois salary details

$43.1K

$130.6K

$184.6K

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

As of Sep 8, 2026, the average yearly pay for senior 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 senior full stack engineer?

Senior Full Stack Engineers are experienced software developers who are proficient in both front-end and back-end technologies. They design, build, and maintain complex web applications, overseeing the entire software development process from user interface to server-side logic and databases. In addition to coding, they often mentor junior developers, lead technical decisions, and ensure best practices are followed throughout the project lifecycle. Their broad skill set allows them to bridge the gap between different development teams and deliver cohesive, high-quality solutions.

How do senior full stack engineers balance hands-on coding with mentoring and leading team projects?

Senior Full Stack Engineers often split their time between developing complex features, reviewing code, and guiding junior team members. Alongside hands-on coding, they play a key role in architectural decisions, ensuring code quality, and fostering best practices across the team. Effective communication and delegation skills are crucial, as they frequently collaborate with product managers, designers, and other engineers to align technical solutions with business goals. This balance provides opportunities for leadership growth while keeping technical skills sharp.

What are the key skills and qualifications needed to thrive as a senior full stack engineer, and why are they important?

To thrive as a Senior Full Stack Engineer, you need deep proficiency in front-end and back-end development, strong problem-solving skills, and a solid foundation in computer science, often supported by a relevant degree or equivalent experience. Familiarity with frameworks like React or Angular, back-end technologies such as Node.js or Java, cloud services, and version control systems like Git is typically required, along with experience in CI/CD and testing tools. Excellent communication, leadership, and collaboration skills help you guide teams and coordinate across disciplines. These skills are crucial for delivering scalable, high-quality software solutions and effectively leading complex projects.

What is the difference between Senior Full Stack Engineer vs Software Developer?

AspectSenior Full Stack EngineerSoftware Developer
CredentialsBachelor's degree in CS or related field; experience often requiredBachelor's degree in CS or related field; entry-level to mid-level experience
Work EnvironmentCollaborates across front-end and back-end teams, often in agile settingsFocuses on coding, testing, and debugging software applications
Industry UsageCommon in tech companies, startups, and enterprise software firmsWidely used across various industries for software development roles

While both roles involve coding and software development, a Senior Full Stack Engineer typically has broader responsibilities across both front-end and back-end systems, often with more experience and leadership duties compared to a Software Developer, who may focus on specific parts of the software stack.

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, and may receive additional compensation such as bonuses or stock options.

What does a senior full stack engineer do?

A senior full stack engineer designs, develops, and maintains both the front-end and back-end components of web applications. They often lead technical projects, write clean code, and use tools like JavaScript, Python, or Java, along with frameworks such as React or Node.js. They also troubleshoot issues, optimize performance, and collaborate with cross-functional teams to deliver complete software solutions.

What are the most commonly searched types of Full Stack Engineer jobs in Illinois?

The most popular types of Full Stack Engineer jobs in Illinois are:

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

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

Infographic showing various Senior 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