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Senior Software Engineer Jobs in Freeport, IL (NOW HIRING)

Senior Mobile Software Engineer - iOS

Beloit, WI ยท Hybrid

$132K/yr

About the role We're seeking a Senior Mobile Software Engineer (iOS) with strong Swift and Objective-C expertise to help drive the next generation of our best-in-class iOS app. You'll lead the ...

... Software Development * Any experience related to Manufacturing, Industrial Machinery, or customer support forSoftware Applications is a plus Qualifications Programming knowledge and skills in C ...

Senior Mobile Developer

Oregon, IL ยท On-site

$125K - $135K/yr

... Software Engineer with a focus on designing and building complex, scalable systems. - Deep understanding of software engineering principles, design patterns, algorithms, and system architecture ...

Senior Electrical Engineer

Loves Park, IL ยท On-site

$103K - $134K/yr

ABOUT THE JOB The Senior Electrical Engineer is responsible for designing, directing, and ... Engineers projects by selecting and designing electrical hardware and software, developing detailed ...

Senior Electrical Engineer

Loves Park, IL

$103K - $134K/yr

ABOUT THE JOB The Senior Electrical Engineer is responsible for designing, directing, and ... Engineers projects by selecting and designing electrical hardware and software, developing detailed ...

Senior Electrical Engineer

Loves Park, IL ยท On-site

$103K - $134K/yr

ABOUT THE JOB The Senior Electrical Engineer is responsible for designing, directing, and ... Engineers projects by selecting and designing electrical hardware and software, developing detailed ...

Proficiency in programming languages commonly used in avionics systems (e.g., C, Ada) * Experience with software testing tools and frameworks for unit, integration SSIT and HSIT), and system level ...

Posted today

Proficiency in programming languages commonly used in avionics systems (e.g., C, Ada) * Experience with software testing tools and frameworks for unit, integration SSIT and HSIT), and system-level ...

Sr. Specialist, Engineering

Rockford, IL ยท On-site

$38 - $45/hr

Develop CNC machining programs using CAM software and CNC controls. * Set up and operate CNC ... Support engineering projects and other duties as assigned by the Sr. Manager, Engineering. Required ...

New

Showing results 21-40

Senior Software Engineer information

See Freeport, IL salary details

$71K

$134.7K

$180.5K

How much do senior software engineer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for senior software engineer in Freeport, IL is $134,701.00, according to ZipRecruiter salary data. Most workers in this role earn between $115,200.00 and $151,800.00 per year, depending on experience, location, and employer.

What is a senior software engineer?

A senior software engineer designs, codes, tests, and maintains computer software. While these are your primary responsibilities as a senior software engineer, you may also have supervisory duties. These include overseeing a team of junior software engineers or developers. The senior software engineer title is sometimes used interchangeably with senior developer, and positions for both may share similar job duties and responsibilities. In general, software engineers are distinguished from developers in that software engineers apply engineering principles to software development.

What are some common challenges senior software engineers face when mentoring junior team members?

Senior Software Engineers often mentor junior colleagues, which can be incredibly rewarding but also presents challenges. Balancing mentorship with project deadlines can be demanding, as it requires strong time management and communication skills. Additionally, adapting explanations to different learning styles and levels of experience can be tricky. However, effective mentorship helps build a stronger team and can lead to enhanced leadership opportunities for the senior engineer.

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

AspectSenior Software EngineerSoftware Developer
CredentialsBachelor's or higher in CS or related field; experience often 5+ yearsBachelor's in CS or related field; entry to mid-level experience
Work EnvironmentDesigning complex systems, leading projects, mentoringWriting code, developing features, debugging
Industry UsageUsed across tech companies, startups, enterpriseCommon in software firms, startups, freelance work
Search & ComparisonOften compared for experience level, responsibilitiesCompared for entry-level to mid-level roles

The main difference between a Senior Software Engineer and a Software Developer lies in experience, responsibilities, and scope. Senior Software Engineers typically have more experience, lead projects, and mentor others, while Software Developers focus on coding and feature development. Both roles are essential in tech companies, but the Senior Software Engineer position involves higher-level planning and leadership.

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

To thrive as a Senior Software Engineer, you need advanced programming skills, deep understanding of software architecture, and several years of experience in software development, often supported by a relevant degree. Familiarity with tools like Git, CI/CD pipelines, cloud platforms, and expertise in technologies such as Java, Python, or JavaScript are typically required. Leadership, problem-solving, and effective communication are crucial soft skills for mentoring teams and collaborating across departments. These skills ensure the delivery of robust, scalable solutions and drive successful project outcomes in complex technical environments.
What are the most commonly searched types of Software Engineer jobs in Freeport, IL? The most popular types of Software Engineer jobs in Freeport, IL are:
What are popular job titles related to Senior Software Engineer jobs in Freeport, IL? For Senior Software Engineer jobs in Freeport, IL, the most frequently searched job titles are:
What cities near Freeport, IL are hiring for Senior Software Engineer jobs? Cities near Freeport, IL with the most Senior Software Engineer job openings:
Infographic showing various Senior Software Engineer job openings in Freeport, IL as of June 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $134,701 per year, or $64.8 per hour.

Senior Mobile Software Engineer - iOS

Vistair

Beloit, WI โ€ข Hybrid

$132K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted just now


Job description

About Comply365

Comply365 is a leading provider of Operational Content Management, Safety Management, and Training Management in the highly regulated industries of Aviation, Defense, and Rail. We provide a powerful combination of expertise and products underpinned by unified best practices, empowering airlines, rail, and defense organizations with the most comprehensive product portfolio to elevate operational excellence, and transform safety management and training, with closer integration of data across these domains. Comply365 ensures our customers' teams and assets are always geared for peak operational performance and unlocks unparalleled financial and operational gains through more streamlined, robust, and agile operations.
Our culture truly sets us apart at Comply365. In addition to our unwavering dedication to our customers and products that we offer, we are, first and foremost, a diverse team of driven, energetic, and passionate individuals who work together to make a direct impact on the future of our company. We have built, and continue to build a world-class, dynamic, and people-first culture. We believe in celebrating one another's achievements, open communication, and transparent leadership.


About the role

We're seeking a Senior Mobile Software Engineer (iOS) with strong Swift and Objective-C expertise to help drive the next generation of our best-in-class iOS app. You'll lead the development of new features, optimize performance, and champion engineering quality across the product.

You'll collaborate closely with product managers, designers, and QA engineers to deliver intuitive, high-performing features that our users rely on every day. We're looking for someone with a proven track record of shipping high-quality iOS apps, a passion for clean architecture and performance, and the ability to guide others toward technical excellence.

At our core, we value open communication, thoughtful collaboration, and pragmatic problem-solving. Great ideas can come from anyone, and we encourage strong opinions balanced with flexibility when presented with new information.

This role is hybrid to our Beloit office with the expectation of attending the office 2 days per week, increasing to 3 days per week in time.


Essential Duties and Responsibilities

  • Design, develop, and maintain production iOS applications using Swift and Objective-C.
  • Ship and support high-quality releases to the Apple App Store.
  • Optimize for performance, reliability, and responsiveness across a wide range of devices.
  • Work closely with design, product, and QA to plan, implement, and validate new features.
  • Contribute to improving development practices, coding standards, and CI/CD pipelines.
  • Stay up to date on the latest iOS SDK changes, frameworks, and Apple developer tools.
  • Mentor peers and share expertise in Swift, UIKit, and app architecture.
  • Communicate progress, risks, and technical insights clearly within the team.


Essential skills

  • 5+ years of professional mobile development experience.
  • 3+ years of hands-on iOS development using Swift and Objective-C.
  • Proven experience releasing and maintaining iOS apps in the App Store.
  • Strong understanding of UIKit, Foundation, Swift Concurrency, and app lifecycle.
  • Experience with REST APIs, JSON, and data persistence using SQLite.
  • Familiarity with modern CI/CD tools (Xcode Cloud, Azure DevOps, or GitHub Actions).
  • Solid grasp of QA methodologies, Agile development, and SDLC best practices.
  • Excellent communication and collaboration skills.
  • Self-driven, organized, and committed to building exceptional user experiences.


Essential technical skills
Swift and Objective-C (commercial experience).
UIKit, SwiftUI, and Auto Layout.
Xcode, Instruments, and Apple developer tools.
Git (GitHub, Azure Repos, or equivalent).
SQLite database management, schema design, and query optimization..
App Store Connect, TestFlight, and provisioning workflows.
CI/CD with Xcode Cloud, Azure DevOps, Jenkins, or GitHub Actions.
Profiling, debugging, and performance optimization using Instruments.


Why come aboard?

Unlimited PTO
Flexible work environment
Paid Holidays

401(k) plan with company

Comprehensive benefits package (medical, dental, vision, life insurance, disability insurance, HSA, and FSA)

Paid parental leave (12 weeks primary caregiver, 6 weeks secondary caregiver) match

Ample learning and development opportunities

Employee referral bonus

Comply365 is a global company, and our success draws upon our employees' diverse viewpoints, skills, and experiences. We are proud to be an equal opportunity employer, and all qualified applicants will receive consideration for employment regardless of age, race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law.