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

DLS Engineering

Senior Software Engineer

Saint Louis, MO · On-site

$118K - $126K/yr

Senior Software Engineer at DLS Engineering (on-site) DLS Engineering is seeking a Senior Software Engineer for a full-time position supporting a geospatial customer in St. Louis, Missouri. This is ...

bioMerieux

Sr. Software Engineer

Hazelwood, MO

$115.50K - $152.30K/yr

The Senior Software Engineer works within established architectural frameworks, enhances CI/CD and infrastructure as code solutions, and develops reliable data pipelines and governance practices. The ...

The Timberline Group

Senior Software Engineer

Saint Louis, MO · On-site

$119.10K - $157K/yr

We are looking for a Senior Software Engineer to produce and implement functional software solutions. You will work with upper management to define software requirements and take the lead on ...

Omni Federal

Senior Software Engineer

Saint Louis, MO · On-site

$119.10K - $157K/yr

Senior Software Engineer Location: St. Louis, MO Security Clearance: Active TS/SCI (or SCI eligibility) We question. We listen. We adapt. Be honest. Be pragmatic. Omni Federal , a Washington, DC ...

Boeing

Senior Software Engineer

Hazelwood, MO · On-site

$133K - $155K/yr

Senior Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Senior Software Engineer

Hazelwood, MO

$133K - $155K/yr

Senior Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Senior Software Engineer

Hazelwood, MO · On-site

$133K - $155K/yr

Senior Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Senior Software Engineer

Hazelwood, MO

$133K - $155K/yr

Senior Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Senior Software Engineer

Hazelwood, MO

$133K - $155K/yr

Senior Software Engineer Company: Tapestry - G0G Tapestry Solutions, A Boeing Company, brings over 30 years of industry experience designing, implementing, training, and supporting high-quality, cost ...

Boeing

Senior Software Engineer-Systems

Berkeley, MO

Senior Software Engineer-Systems Company: The Boeing Company The Boeing Company is currently seeking Senior Software Systems Engineer to support our Phantom Works Open Architecture Systems Integrated ...

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Senior Software Engineer information

See Roxana, IL salary details

$72.4K

$137.4K

$184.1K

How much do senior software engineer jobs pay per year?

As of May 30, 2026, the average yearly pay for senior software engineer in Roxana, IL is $137,413.00, according to ZipRecruiter salary data. Most workers in this role earn between $117,500.00 and $154,900.00 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 are Senior Software Engineers?

Senior Software Engineers are experienced professionals who design, develop, and maintain complex software systems. They often lead technical projects, mentor junior team members, and make architectural decisions. Their role involves collaborating with stakeholders to understand requirements, ensuring code quality, and staying up-to-date with the latest technologies. Senior Software Engineers are expected to have strong problem-solving skills and a deep understanding of software development best practices.

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.

More about Senior Software Engineer jobs
What are the most commonly searched types of Software Engineer jobs in Roxana, IL? The most popular types of Software Engineer jobs in Roxana, IL are:
What cities near Roxana, IL are hiring for Senior Software Engineer jobs? Cities near Roxana, IL with the most Senior Software Engineer job openings:
Senior Software Engineer jobs near you
Senior Software Engineer

Senior Software Engineer

DLS Engineering

Saint Louis, MO • On-site

$118K - $126K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Posted 25 days ago

Job description

About DLS Engineering
DLS is an engineering firm with 30 years of Federal Government contracting experience. Our small business efficiencies coupled with a commitment to excellence allow us to provide reliable solutions with integrity for our nation's most critical defense and national security priorities.
Senior Software Engineer at DLS Engineering (on-site)
DLS Engineering is seeking a Senior Software Engineer for a full-time position supporting a geospatial customer in St. Louis, Missouri. This is an on-site position.
This role requires strong full-stack Python experience, with a focus on API development, Kubernetes deployment, and modern DevOps practices to accelerate delivery. The Senior Software Engineer will work with an existing code base learning it quickly, manipulating it for adjacent use cases, and implementing new features that advance mission capabilities. A background in geospatial systems, imagery acquisition, and geometry is a significant plus.
Why this role is a great next step for your career:
This position supports an exciting modernization initiative providing enterprise architectural, engineering, operations and sustainment, modification, and testing of geospatial-intelligence core services. This utilizes secure cloud environments, and a modern agile development methodology making data accessible, discoverable, and deliverable.
St. Louis offers a low cost of living, vibrant cultural scene, and abundance of free attractions and outdoor spaces. It offers a mix of big-city amenities and smaller-town charm, with unique neighborhoods, diverse food options, professional sports teams, and a growing technology sector.
A day in the life:
  • Create, maintain and/or improve the software code, with duties to design and update software databases
  • Technical delivery across many areas of software development including: assessments and evaluations, designing and engineering, agile development, Continuous Integration (CI)/Continuous Delivery (CD)/pipeline configuration and utilization, application development, front end development, server side development, API development, testing, security and accreditation, system integration, operations and sustainment, and documentation/template development and maintenance.

When I read the below it sounds like me:
Required Security Clearance: Top Secret/SCI
Required: United States Citizenship
Required Knowledge:
  • Possesses senior knowledge and senior hands-on experience in developing, implementing and leading software programs.
  • Astute ability in writing test scripts, and test-driven development in an agile software development environment, where built-in automated test procedures are paramount and continuous integration of software and continuous delivery of software to the Government is the culture.

Required Education:
  • Master's degree in Computer Science, Engineering, Mathematics, or a related technical field with 8+ years of software engineering experience
  • OR Bachelor's degree in a similar field with 10+ years of software engineering experience.
  • OR 12+ years of software engineering experience

Required Experience
  • Full-stack Python development
  • Building and maintaining APIs (ex. FastAPI)
  • Kubernetes and DevOps practices to support rapid deployment and sustainment
  • Proven ability to work with pre-existing code bases, understand them quickly, and adapt functionality for new use cases.
  • Web services architecture, design, and development.
  • Working in secure cloud environments (e.g., AWS GovCloud, C2S)

Other information:
  • We offer a competitive salary and a 401k program with company match.
  • We offer a comprehensive benefits package including health, vision, dental, life, and disability insurance.
  • We offer a generous paid time off package
  • If accommodation is needed with the application and / or the interview process for applicants with disabilities, please contact Human Resources at 757-494-5151.
  • DLS is an E-Verify company.
  • DLS is an equal employment opportunity employer. Qualified applicants will receive consideration without regard to age, race, religion, sex (pregnancy, sexual orientation, gender identity), national origin, or disability. We encourage all qualified applicants to apply. If you believe you have been discriminated against, please contact Barbara Ellison. You also have the right to file a charge of discrimination with the equal employment opportunity commission.
  • Must be able pass a government background check, which will be completed before employment.

The pay range for this role is:
118,000 - 126,000 USD per year (St. Louis, MO)

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