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

Harris

Senior Software Engineer

Oregon, IL · Remote

$120/hr

As a Senior Software Engineer, this professional will lead the design and development of entire computer systems and application software. They will leverage their expertise to create scalable and ...

New

Harris

Senior Software Engineer

Oregon, IL · Remote

$120/hr

As a Senior Software Engineer, this professional will lead the design and development of entire computer systems and application software. They will leverage their expertise to create scalable and ...

New

Collins Aerospace

Senior Software Engineer

Rockford, IL · Hybrid

$122K - $161K/yr

Not Required Join our team in Rockford, IL as a Senior Software Engineer and help develop the embedded software behind advanced aerospace electric power systems. You'll collaborate with talented ...

Raytheon Technologies

Senior Software Engineer

Rockford, IL · On-site

$122K - $161K/yr

Not Required Join our team in Rockford, IL as a Senior Software Engineer and help develop the embedded software behind advanced aerospace electric power systems. You'll collaborate with talented ...

Prattwhitney

Senior Software Engineer

Rockford, IL · On-site

$87 - $165/hr

Not Required Join our team in Rockford, IL as a Senior Software Engineer and help develop the embedded software behind advanced aerospace electric power systems. You'll collaborate with talented ...

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

$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 ...

Harris

Software Engineer

Oregon, IL · On-site

$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 ...

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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 22, 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 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 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 does a senior software engineer do?

A senior software engineer designs, develops, and maintains software applications, often leading projects and mentoring junior team members. They analyze requirements, write code, perform testing, and collaborate with cross-functional teams to ensure quality and efficiency. Proficiency in programming languages, problem-solving skills, and experience with development tools are essential for this role.
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.

Senior Software Engineer

Harris

Oregon, IL • Remote

$120/hr

Full-time

Medical, Dental, Vision, PTO

Posted 3 days ago

New

Harris Computer rating

8.5

Company rating: 8.5 out of 10

Based on 10 frontline employees who took The Breakroom Quiz

80th of 246 rated software companies

Job description

As a Senior Software Engineer, this professional will lead the design and development of entire computer systems and application software. They will leverage their expertise to create scalable and robust solutions, mentor junior developers, and drive best practices across the development team. This role offers the opportunity to work on challenging projects, collaborate with cross-functional teams, and contribute to the success of our business. Must maintain all certifications as required by local professional associations.
Responsibilities & Duties:
- Contribute to architectural discussions, make design decisions, and ensure that the overall software architecture aligns with business goals and industry best practices.
- Solve complex technical problems and make critical decisions related to technology selection, system architecture, and project planning.
- Provide technical leadership and guidance to junior members of the development team.
- Conduct code reviews to ensure code quality, maintainability, and adherence to coding standards.

- Strong Cloud Experience (Azure & AWS)

- Experience with AI agent code development and integration into products

- Data system design and Architecture experience.
Requirements:
- Bachelor's degree or Diploma in Computer Science, Engineering, related field, or equivalent work experience.
- 8+ years of experience in software development, and 3+ years as a Software Engineer with a focus on designing and building complex, scalable systems.
- Deep understanding of software engineering principles, design patterns, algorithms, and system architecture.
- Ability to lead technical discussions, make critical decisions, and drive consensus among team members.
- Experience with cloud technologies and microservices architecture.

What will make you stand out:

- Experience with graph apis and graphql systems.

What we offer:

  • Plenty of opportunities to grow your career

  • Comprehensive medical, dental, and vision benefits

  • 3 weeks of vacation plus 5 personal days to recharge

  • Employee stock ownership and RRSP program

  • A chance to give back through community involvement

  • Flexible work arrangements to suit your lifestyle

Salary Range: $120 - 150K

About us:

Established in 2009, ClearDATA was born out of a need to address significant inefficiencies within the U.S. healthcare system. From slow data processing to security concerns, these challenges often stood between patients and timely and effective care.

As the healthcare industry began to embrace the public cloud, technology leaders faced a new set of challenges. Organizations found themselves navigating the fast-paced world of cloud innovations, regulatory compliance changes, and looming cyber threats. ClearDATA's founders understood the complexities involved this highly-regulated industry and created the first cloud compliance and security solution exclusively for healthcare.

About Harris Computer:

Harris provides mission critical software solutions for the Public Sector, Healthcare, Utilities and Private Sector verticals throughout North America, Europe, Asia and Australia.
Working for Harris is the perfect opportunity to fulfill your professional goals as well as achieve your personal dreams!
Our employees enjoy a casual work environment that offers comfort while providing superior service to our customers. We offer a comprehensive benefit package as well as other additional "Perks"!

  • We empower our employees to make a difference
  • We have an award-winning culture
  • We offer opportunity to learn
  • We are financially strong and we are owned by the largest software company in Canada (CSI)
  • We have fun!

Follow us on social media to learn more about our company values, culture and initiatives!

  • Instagram: @weareharris
  • LinkedIn: Harris Computer

#LI-remote

What Harris Computer employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

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About Harris Computer Systems

Sourced by ZipRecruiter

Harris Computer Systems, based in Ottawa, ON, CA, is an established player in the field of public sector software technology. Since its inception in 1976, the company has been striving to make clients' operations more efficient through reliable, practical, and flexible software solutions. Its extensive portfolio primarily serves utility, healthcare, public sector, and educational institutions, contributing to the betterment of public services through technology. Harris strongly believes in the value of forward-thinking technology and the power it has to drive progress for the public sector. This methodology is entirely in line with their mission to ensure customer success by providing reliable, practical, and robust software solutions.

Industry

Accounting services

Company size

1,001 - 5,000 Employees

Headquarters location

Ottawa, ON, CA

Social media

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