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Senior Software Engineer Jobs in Appleton, WI (NOW HIRING)

Rotating Machinery Svcs Inc

Senior Engineer

Menasha, WI · On-site

$106K - $146K/yr

The Senior Engineer is the 4th level of progression on the Engineering Technical Career Path for ... Exhibit high-proficiency in running engineering software such as 3D CAD modeling design software ...

Rotating Machinery Svcs Inc

Senior Engineer

Menasha, WI · On-site

$106K - $146K/yr

The Senior Engineer is the 4th level of progression on the Engineering Technical Career Path for ... Exhibit high-proficiency in running engineering software such as 3D CAD modeling design software ...

Tweet/Garot Mechanical

Sr. Engineer

De Pere, WI · On-site

$100K - $138K/yr

As a Senior HVAC Designer/Engineer, you will serve as a technical leader within the Building ... Perform heating and cooling load calculations with standard industry software (Carrier HAP or Trane ...

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All JobsSoftware Engineer JobsSenior Software Engineer JobsSenior Software Engineer Jobs in Appleton, WI

Senior Software Engineer information

See Appleton, WI salary details

$73.7K

$139.8K

$187.3K

How much do senior software engineer jobs pay per year?

As of Aug 19, 2026, the average yearly pay for senior software engineer in Appleton, WI is $139,813.00, according to ZipRecruiter salary data. Most workers in this role earn between $119,500.00 and $157,600.00 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.
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Senior Software Engineer jobs near you
Infographic showing various Senior Software Engineer job openings in Appleton, WI as of August 2026, with employment types broken down into 1% As Needed, 85% Full Time, 10% Part Time, and 4% Contract. Highlights an 89% Physical, 3% Hybrid, and 8% Remote job distribution, with an average salary of $139,813 per year, or $67.2 per hour.

Software Engineer (AWS, .NET)

J. J. Keller & Associates, Inc.

Neenah, WI • Hybrid

Full-time

Posted 14 days ago

Job description

Requisition #: 20839
Functional Area:  Software Development
Employment Type:  Full-Time
Work Options:  In Office / Partial Remote from Neenah/Appleton/Oshkosh area #LI-Hybrid
Work Hours:  Standard Business Hours

Position Summary

J. J. Keller is seeking a Software Engineer with strong AWS and .NET expertise to help design, develop, deploy, and support business-critical applications and cloud-based services. This role combines software development with cloud infrastructure and DevOps responsibilities, providing an opportunity to work across the full application lifecycle, from technical design and coding to deployment automation, monitoring, and production support.

The ideal candidate is a hands-on software engineer who enjoys building scalable solutions, improving system reliability, and leveraging modern cloud technologies. This individual will collaborate with cross-functional teams to deliver enhancements, troubleshoot complex issues, lead small to medium-sized development initiatives, and contribute to our ongoing cloud modernization efforts.

Key Technologies: AWS: Elastic Beanstalk (Windows & Linux), CloudWatch, Lambda, ECS/ECR (Fargate), Terraform, CloudFormation

Job Responsibilities
  • Performs assigned programming tasks related to new development or maintenance on assigned websites or applications.
  • Analyzes user needs and impact to other site areas to determine technical requirements of assigned tasks.
  • Promotes strong quality practices by performing unit testing and providing appropriate level of support for user acceptance testing, as needed.
  • Follows secure coding standards and incorporates basic security-by-design principles into assigned development tasks.
  • Adheres to OWASP best practices to reduce common security risks such as input validation errors, insecure data handling, etc.
  • Maintains accurate technical documentation for assigned programming projects.
  • Acts as a support resource for the technical support staff to ensure that customer-reported issues are being addressed in an efficient and accurate manner.
  • Performs lead developer role on assigned projects.
  • Interfaces with Website and Database Administrators to maintain optimal server configuration, database accuracy/integrity and for coordination of staging and production moves.
  • Develops and maintains a solid understanding of the technology tools and trends and remains current in new technology developments and their potential impact on the department.
Qualifications

Experience & Education

  • 3+ years of software engineering experience, including analysis, design, development, testing, deployment, and production support.
  • Experience developing and supporting .NET-based web applications and services.
  • Experience working in cloud-based environments.
  • Working knowledge of Software Development Life Cycle (SDLC) methodologies and best practices.
  • Associate's degree in Computer Science, Information Technology, or a related field required; Bachelor's degree preferred.
    • Equivalent combinations of education and relevant experience will be considered.

Technical Skills

  • Required
    • AWS services including:
      • Elastic Beanstalk (Windows and Linux)
      • CloudWatch
      • Lambda
      • ECS/ECR with Fargate
    • .NET application development and support
    • Windows Server and IIS administration
    • Linux server administration and troubleshooting
    • SQL Server development and database design concepts
    • CI/CD pipeline creation, maintenance, and deployment automation
    • Object-oriented programming principles
    • Source control and modern development practices
  • Preferred
    • Infrastructure as Code using Terraform and/or CloudFormation
    • Identity and Access Management solutions, including Okta (SSO/OIDC)
    • Experience migrating applications from Windows-based hosting environments to Linux platforms
    • Containerization and cloud-native application architectures
    • Experience supporting highly available production environments
Physical Requirements

Work is performed primarily in a standard office environment. Work involves operation of personal computer equipment for extended periods of time. Occasional travel to offsite offices, customer sites and/or industry and training events may also be required, depending on assignment.

We Protect People & The Businesses They Run

Every associate at J. J. Keller makes a difference by creating safer, more respectful workplaces. Whether serving our customers directly with expertise in safety and regulatory compliance or supporting the business with specialized skills, together we contribute to better workplaces for people across North America.

J. J. Keller History:  November 1, 2023, marked 70 years of business for J. J. Keller & Associates, Inc. Click HERE to take a tour through three generations of this family-owned business - from our founding as a one-man consulting firm through decades of delivering on our purpose of protecting people and the businesses they run.

J. J. Keller Career Stories:  Click HERE to hear from our associates about what they have to say about life as an associate at J. J. Keller.

J. J. Keller Earns 8th Great Place to Work Certification:  Click HERE to find out what makes J. J. Keller great.

J. J. Keller Certified as a Top 100 Most Loved Workplace in America:  Click HERE to find out why our associates LOVE working at J. J. Keller.

2024 Top Company for Women to Work for in Transportation:  Click HERE to learn more about this prestigious recognition.

If you experience system-related issues or need assistance with the online application, please call (920) 720-7700.

Professional Referral Program:  Not the right role for you, but know someone who could be a great fit? Click HERE to refer them to us through our Professional Referral Program and you will earn a cash payment if your referral is hired.

J. J. Keller & Associates, Inc. is an Equal Opportunity Employer and does not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity, status as a veteran, and basis of disability or any other federal, state or local protected class.

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