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Senior Full Stack Developer Jobs in Crystal Lake, IL

Fictiv

Senior Full Stack Software Engineer

Schaumburg, IL · On-site

$100K - $130K/yr

Distinguished skills, abilities, features, character, and quality. * 3-6 years of relevant full-stack engineering experience * Strong proficiency in Node.js, JavaScript/TypeScript, React, and Next.js

PeopleVeda

Full Stack Developer

Libertyville, IL · On-site

They have immediate need for two Fullstack Developer experienced in NodeJS, ReactJS and Redux. * Design, develop, test and debug applications and systems of varying degrees of complexity * Develop ...

PeopleVeda

Full Stack Developer

Libertyville, IL · On-site

They have immediate need for two Fullstack Developer experienced in NodeJS, ReactJS and Redux. * Design, develop, test and debug applications and systems of varying degrees of complexity * Develop ...

DataDelivers LLC

Full Stack Engineer

Schaumburg, IL · On-site

$115K - $130K/yr

Full Stack Engineer Product Strategy & Technology Team (PST) Reports to: Director of Product Development. Location: Schaumburg IL Hybrid schedule (in office Monday, Tuesday, Thursday). The Full Stack ...

Datadelivers

Full Stack Engineer

Hoffman Estates, IL · On-site

$80 - $110/hr

Full Stack Engineer Product Strategy & Technology Team (PST) Reports to: Director of Product Development. Location: Schaumburg IL Hybrid schedule (in office Monday, Tuesday, Thursday). The Full Stack ...

DataDelivers LLC

Full Stack Engineer

Schaumburg, IL · On-site

$115K - $130K/yr

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 ...

Fictiv

Senior Full Stack Software Engineer

Schaumburg, IL · On-site

$100K - $130K/yr

Distinguished skills, abilities, features, character, and quality. * 3-6 years of relevant full-stack engineering experience * Strong proficiency in Node.js, JavaScript/TypeScript, React, and Next.js

Datadelivers

Full Stack Engineer

Schaumburg, IL · On-site

$80 - $110/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 ...

Infosys Limited Digital

Java Full Stack Developer

Elgin, IL · On-site

$52 - $67/hr

... Full stack|Java Full stack Technical Skills 3 Technology|cross platform mobile development|React Native Salary min 71079 Salary max 92403 Overview The Infosys Communications, Media, and Technology ...

New

Infosys

Java Full Stack Developer

Elgin, IL · On-site

$52 - $67/hr

In the assigned Job Role of Technology Consultant 2, your Area Of Responsibility will be as below: • Contribute to the requirements elicitation process by documenting assigned parts of business ...

Complete Fence

Full Stack Engineer

Batavia, IL · On-site

$60 - $90/hr

As a Full Stack Engineer you will play a vital role in developing a new platform that will help with consolidating pre-construction planning, project management, logistics, & accounting. You'll be ...

Okara

Full Stack Engineer

Mundelein, IL · On-site

... and we need engineers who can own a piece of that and move fast. You'll work directly with the ... Our tech stack is NextJs, React, Vercel, AWS, etc. * Build and ship features across our agents ...

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All JobsFull Stack Developer JobsSenior Full Stack Developer JobsSenior Full Stack Developer Jobs in Crystal Lake, IL

Senior Full Stack Developer information

See Crystal Lake, IL salary details

$23

$57

$83

How much do senior full stack developer jobs pay per hour?

As of Sep 7, 2026, the average hourly pay for senior full stack developer in Crystal Lake, IL is $57.47, according to ZipRecruiter salary data. Most workers in this role earn between $47.79 and $66.20 per hour, depending on experience, location, and employer.

What is a senior full stack developer?

Senior Full Stack Developers are experienced professionals who design, develop, and maintain both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to handle servers, databases, APIs, and user interfaces. In addition to coding, they often lead development teams, make architectural decisions, and ensure software quality and scalability. Their expertise allows them to oversee the entire application lifecycle, from concept to deployment.

How does a senior full stack developer typically collaborate with cross-functional teams during a project lifecycle?

As a Senior Full Stack Developer, you'll frequently collaborate with designers, product managers, QA engineers, and other developers to deliver end-to-end solutions. You'll be involved in requirements discussions, offer technical guidance, and help align frontend and backend development with business goals. Your role often includes code reviews, mentoring junior team members, and ensuring seamless integration across various systems. This collaborative environment encourages knowledge sharing and innovation while ensuring project success.

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

To thrive as a Senior Full Stack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, usually supported by a relevant degree and several years of experience. Mastery of tools such as Git, Docker, CI/CD systems, and cloud platforms like AWS or Azure is typically required, alongside familiarity with databases and version control systems. Strong problem-solving abilities, leadership, effective communication, and collaboration skills set exceptional developers apart. These skills and qualities are crucial for delivering robust, scalable solutions while mentoring teams and efficiently bridging gaps between client requirements and technical implementation.

What is the difference between Senior Full Stack Developer vs Backend Developer?

AspectSenior Full Stack DeveloperBackend Developer
Required SkillsProficiency in both frontend and backend technologies, such as JavaScript, HTML, CSS, and server-side languages like Node.js, Python, or JavaSpecialized in server-side development, working with languages like Java, Python, Ruby, or PHP, and database management
Work EnvironmentCollaborates across frontend and backend teams, often involved in full project lifecycleFocuses primarily on backend systems, APIs, and database integration
Common UsageUsed in roles requiring full project oversight and versatile development skillsUsed in roles focused on server-side logic, database management, and API development

The main difference is that a Senior Full Stack Developer handles both frontend and backend development, providing a comprehensive approach to projects, while a Backend Developer specializes solely in server-side logic and database management. Both roles require strong programming skills, but the Full Stack Developer's expertise spans the entire technology stack.

What are the most commonly searched types of Full Stack Developer jobs in Crystal Lake, IL?

The most popular types of Full Stack Developer jobs in Crystal Lake, IL are:

What job categories do people searching Senior Full Stack Developer jobs in Crystal Lake, IL look for?

The top searched job categories for Senior Full Stack Developer jobs in Crystal Lake, IL are:

What cities near Crystal Lake, IL are hiring for Senior Full Stack Developer jobs?

Cities near Crystal Lake, IL with the most Senior Full Stack Developer job openings:

Senior Full Stack Developer jobs near you
Infographic showing various Senior Full Stack Developer job openings in Crystal Lake, IL as of August 2026, with employment types broken down into 71% Full Time, and 29% Contract. Highlights an 100% In-person job distribution, with an average salary of $119,536 per year, or $57.5 per hour.

Senior Full Stack Developer (.NET AI Focused)

Tech Tammina LLC

Hoffman Estates, IL • On-site

Contractor

Re-posted 20 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