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

Lean Synergy Solutions

Software Engineer

Rockford, IL

$80K - $120K/yr

Software Engineer Position Summary We are seeking a talented Software Engineer to join a collaborative engineering team developing advanced software solutions that support automated manufacturing ...

Lean Synergy Solutions

Software Engineer

Rockford, IL · On-site

$80K - $120K/yr

Software Engineer Position Summary We are seeking a talented Software Engineer to join a collaborative engineering team developing advanced software solutions that support automated manufacturing ...

Belcan

Software Engineer

Rockford, IL

$83K - $104K/yr

A Software Engineer job in Rockford, IL is currently available through Belcan at one of our key aerospace clients. We are seeking a highly motivated Software Engineer with a focus on Linux Simulation ...

Harris

Software Engineer

Oregon, IL · On-site

$80K - $90K/yr

Requirements: - Bachelor's degree or Diploma in Computer Science, Engineering, related field, or equivalent work experience. - 3+ years of experience in software development, with proficiency in one ...

CyberCoders

Software Engineer- .NET

Monroe, WI · On-site

Software Engineer- .NET Software Engineer Location: Monroe, WI - Onsite 5 days a week Position Overview We are seeking a Software Engineer with strong experience building backend systems using .NET ...

Harris

Software Engineer

Oregon, IL

$70K - $80K/yr

The Software Engineer will work with colleagues to deliver reliable and scalable applications that contribute to keeping first responders in the field safe, efficient, and informed with mission ...

TecTammina

Software Engineer - Inspection

Rockford, IL · On-site

Company Description Tech Tammina LLC Design, analysis, programming, debugging, and modification of software for composite applications Investigate application engineering tasks and prepare design ...

Comply365

Senior Mobile Software Engineer - iOS

Beloit, WI · On-site

$132K/yr

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 ...

Comply365

Senior Mobile Software Engineer iOS

Beloit, WI · On-site

$132K/yr

About the role Were 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. Youll lead the ...

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Showing results 1-20

All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Freeport, IL

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.
More about Senior Software Engineer jobs
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:
Senior Software Engineer jobs near you
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.

Software Engineer

Lean Synergy Solutions

Rockford, IL

$80K - $120K/yr

Full-time

Re-posted 12 days ago

Job description

Software Engineer

Position Summary
We are seeking a talented Software Engineer to join a collaborative engineering team developing advanced software solutions that support automated manufacturing systems, industrial machinery, and user interface applications. This role offers the opportunity to design, develop, and enhance software used in cutting-edge manufacturing environments, including additive and subtractive manufacturing technologies. The ideal candidate is a strong C++ developer with excellent analytical skills and an interest in solving complex engineering challenges within a fast-paced, innovation-driven environment.

Employment Type: Full-Time

Key Responsibilities

  • Design, develop, analyze, debug, test, and maintain software applications for industrial machine and computer systems.
  • Investigate engineering requirements and prepare software design specifications, technical analyses, and implementation recommendations.
  • Support manufacturing process integration for advanced manufacturing applications.
  • Assist with software deployment, troubleshooting, maintenance, and customer support activities.
  • Collaborate with cross-functional engineering teams to develop innovative software solutions.
  • Support one-of-a-kind manufacturing projects for global industrial customers.
  • Meet project schedules while maintaining high standards of software quality and performance.
  • Contribute to continuous improvement initiatives supporting quality, safety, productivity, and operational excellence.
  • Develop working knowledge of automated machine tools, robotics systems, and supporting software infrastructure.
  • Partner closely with engineering, manufacturing, and technical teams to achieve project objectives.

Required Qualifications

  • Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related technical field.
  • Equivalent engineering degree (Mechanical or Aerospace Engineering) with relevant software development experience will also be considered.
  • Strong programming experience using C++.
  • Excellent analytical, problem-solving, and critical thinking skills.
  • Solid understanding of:
    • 3D geometry
    • Vectors and transformations
    • Mathematical modeling
  • Strong communication and interpersonal skills.
  • Ability to learn complex manufacturing systems and industrial automation technologies.
  • U.S Citizenship or Permanent Resident

Preferred Qualifications

  • Experience with Microsoft Visual Studio.
  • Experience using version control systems (Git, SVN, etc.).
  • Experience developing algorithms, computational methods, or filtering techniques.
  • Experience with multi-threaded software development.
  • Experience using the Qt framework.
  • Experience supporting manufacturing, industrial machinery, or engineering software applications.
  • Knowledge of machine learning and computer vision concepts.
  • Experience working with SQL databases and T-SQL (SQL Server, Oracle, or similar platforms).

Location

  • On-site position, Rockford, IL.
  • Ability to work within an industrial manufacturing environment.

Compensation & Benefits

Compensation: $80,000 - $120,000
Benefits: Comprehensive benefits package available.

About Lean Synergy

Lean Synergy Solutions is a Veteran-owned and operated recruiting firm that specializes in aligning top-tier talent with high-impact roles across a variety of industries. Our team, consisting of military veterans and industry specialists, brings a mission-driven approach to workforce solutions. Focused on placing skilled professionals in key roles, we help organizations navigate transformation with precision. We are committed to supporting transitioning service members, veterans, military spouses, and civilian professionals by providing access to meaningful, long-term career opportunities in government, public, and private sector positions.

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