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Sr Software Jobs in Missouri (NOW HIRING)

Senior Software Engineer

Saint Louis, MO · On-site +1

$119K - $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 ...

$114K - $151K/yr

Title and Summary Senior Software Engineer Overview Mastercard's Network & Digital Payments group creates meaningful digital payment experiences for consumers, merchants, issuers, and partners at ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who We Are Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a ...

$114K - $151K/yr

Title and Summary Senior Software Engineer Who We Are Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Overview Mastercard's Network & Digital Payments group creates meaningful digital payment experiences for consumers, merchants, issuers, and partners at ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive digital economy that ...

Sr. Software Engineer

Hazelwood, MO · On-site

$113K - $149K/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 ...

Job Title Senior Software Architect What does a successful Senior Software Architect do at Fiserv? A successful Senior Software Architect at Fiserv works within a Scrum development and DevOps team to ...

Sr. Software Engineer

Hazelwood, MO · On-site

$115K - $152K/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 ...

Sr. Software Engineer

Hazelwood, MO · On-site

$115K - $152K/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 ...

Sr. Software Engineer

Hazelwood, MO

$115K - $152K/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 ...

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy ...

Senior Software Engineer

O Fallon, MO · On-site

$114K - $151K/yr

Title and Summary Senior Software Engineer Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy ...

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Showing results 1-20

Sr Software information

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

To thrive as a Senior Software Engineer, you need strong proficiency in programming languages (such as Java, Python, or C#), software architecture, and a bachelor’s degree in computer science or a related field. Expertise with development frameworks, version control systems like Git, and cloud platforms such as AWS or Azure is commonly required, along with certifications like AWS Certified Solutions Architect. Leadership, problem-solving, and effective communication skills help you mentor junior engineers and collaborate across teams. These skills ensure the delivery of robust, scalable solutions and foster innovation within complex technical environments.

What is the difference between Sr Software and Software Developer?

AspectSr SoftwareSoftware Developer
Required CredentialsBachelor's degree in CS or related field; 3+ years experience; sometimes certificationsBachelor's degree in CS or related field; 0-3 years experience; certifications optional
Work EnvironmentOften leads projects, mentors juniors, involved in architecture decisionsFocuses on coding, debugging, and implementing features under guidance
Employer & Industry UsageUsed across tech companies, startups, and enterprise firms for senior rolesCommon entry to mid-level role in software development teams

The main difference between a Sr Software and a Software Developer lies in experience, responsibilities, and leadership. Sr Software professionals typically have more experience, take on leadership roles, and influence project architecture, while Software Developers focus on coding and implementing features. Both roles require a strong foundation in programming, but the Sr Software position involves greater oversight and strategic input.

What does a senior software engineer do?

A Sr Software Engineer is responsible for designing, developing, and maintaining complex software applications. They often lead technical projects, mentor junior team members, and collaborate closely with stakeholders to ensure software meets business objectives. Their role typically involves writing high-quality code, reviewing code from peers, and making architectural decisions. Sr Software Engineers are also expected to stay updated with industry trends and best practices to improve software performance and reliability.

What are some common challenges faced by senior software engineers when leading project teams, and how can they effectively overcome them?

Senior Software Engineers often encounter challenges such as balancing hands-on coding with mentoring less experienced team members, managing project timelines, and ensuring code quality across the team. Effective communication and proactive planning are key to overcoming these hurdles. By fostering a collaborative environment, setting clear expectations, and leveraging agile methodologies, Senior Software Engineers can guide their teams to successful project delivery while supporting professional growth within the team.
Infographic showing various Sr Software job openings in Missouri as of August 2026, with employment types broken down into 1% Internship, 90% Full Time, 6% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution.

Senior Software Engineer

DIT-MCO International, LLC

Kansas City, MO • On-site

$119K - $157K/yr

Full-time

Posted 6 days ago


Job description

Description:

Senior Software Engineer – Aerospace & Defense Test Systems

Location: Kansas City, MO

Job Type: Full-Time

Industry: Aerospace, Defense, Automated Test Equipment

Citizenship Requirement: U.S. Citizenship Required

Senior Software Engineer – Cutting-Edge Technology


Build Something That Matters

DIT-MCO International has been a trusted leader in wire harness testing and aerospace innovation for more than 75 years. We design and manufacture advanced test equipment for aerospace, defense, and industrial customers worldwide. We're looking for a Senior Software Engineer who enjoys developing software, solving problems, and collaborating to build high-quality, effective software solutions. If you enjoy software development, troubleshooting, automation, and continuous improvement for mission-critical testing systems used in demanding environments, we'd love to meet you.


Why Join DIT-MCO?

Work for a stable, employee-focused company with more than 75 years of success

Be part of a collaborative engineering and manufacturing team

Make a direct impact on production quality, efficiency, and continuous improvement

Work on sophisticated aerospace and electronic manufacturing products

Competitive pay, excellent benefits, and opportunities for growth


About the Role

DIT-MCO International is seeking a Senior Software Engineer to design, develop, and maintain software used in advanced automated test equipment. In this role, you will lead software development efforts from concept through deployment, working closely with cross-functional engineering teams to deliver reliable, high-performance solutions.

This position is ideal for an experienced engineer who enjoys solving complex problems, working at the intersection of software and hardware, and taking ownership of technical outcomes.


What You’ll Do

  • Research, design, and develop computer and network software and specialized utility programs
  • Analyze user and system requirements to create effective software solutions
  • Lead software projects from concept through completion, ensuring quality and performance
  • Oversee software architecture and design for new product development
  • Develop and implement software using Microsoft .NET and Visual Studio (C#)
  • Support and maintain both new and legacy software used in automated test equipment
  • Work with hardware engineers to integrate software and hardware systems
  • Ensure system specifications and performance requirements are clearly understood and met
  • Collaborate with product management, project management, engineering teams, and customers
  • Develop, deploy, and support software as assigned
  • Guide and mentor team members through knowledge sharing and technical leadership
  • Assist with troubleshooting analog and digital hardware as it relates to software systems


Requirements:

Education and Experience

  • Bachelor's degree in a relevant field of engineering, computer science, or equivalent experience.
  • U.S. citizenship.
  • Minimum of five years of experience as a Software Developer, Software Engineer, or similar role.
  • Demonstrated expertise developing web applications within popular frameworks, with a strong command of software design and development in a test-driven environment.
  • Proven experience applying Agile development methodologies, including leading or guiding Agile practices within a team.
  • Advanced proficiency in database management, SQL, and Object-Relational Mapping (ORM) frameworks.
  • Specific and related industry experience, in addition to analog and digital hardware troubleshooting skills.

Skills

  • Experience with Microsoft Office (Excel, Word, Outlook, and Project).
  • Excellent communication skills, both written and verbal.
  • Strong organizational skills and attention to detail, quality, and efficiency.
  • The ability to handle sensitive information discreetly and confidentially.
  • Demonstrate strong problem-solving skills and the ability to make timely and informed decisions.
  • Proficient in both independent work and collaborative team environments.
  • Interact and build relationships with internal personnel at all levels of the organization.
  • Self-motivated and able to manage time and projects effectively.
  • Identify and analyze complex situations, determine potential solutions, and implement strategies to overcome challenges while considering the team's input and best interests.
  • Analog and digital hardware troubleshooting skills.
  • Willingness to learn and adapt to new technologies and processes.


Primary Job Duties

  • Own software architecture and design decisions for new products, from conception through completion.
  • Lead the design of algorithms and flowcharts, in collaboration with other developers.
  • Produce clean, efficient code based on specifications, within a test-driven development environment.
  • Integrate software components into fully functional software systems and oversee verification and deployment.
  • Ensure clear understanding of system specifications and requirements across the project team.
  • Serve as a subject matter expert in essential core technologies.
  • Troubleshoot, debug, and upgrade existing and legacy software.
  • Gather and evaluate user feedback; recommend and drive execution of improvements.
  • Create and maintain technical documentation for reference and reporting.
  • Collaborate with Product Managers, Project Managers, other engineers, other departments, and customers to drive innovation, solve complex problems, and deliver high-quality solutions.
  • Guide and mentor team members by providing constructive feedback, offering growth opportunities, and sharing knowledge and expertise.
  • Lead by example, demonstrating integrity, professionalism, and a strong work ethic.
  • Supervise or train project team members, as necessary.

Work Environment

  • Good or corrected vision and the ability to distinguish colors.
  • Ability to perform the physical activities necessary to carry out job responsibilities, including moving about the work environment and maintaining stationary positions as needed.
  • Manual dexterity is sufficient to operate equipment, tools, and standard office technology.
  • Ability to function in a fast-paced environment, manage multiple priorities, meet deadlines, and effectively handle changing demands.
  • Ability to occasionally lift, carry, push, or pull up to 25-50 pounds, depending on position requirements.