Demo

Sr. Software Engineer-Developer

Apex Systems
Hazelwood, MO Full Time
POSTED ON 4/9/2026
AVAILABLE BEFORE 5/8/2026
Job#: 3021490

Job Description:

Our client is looking for a Senior Software Engineer - Developer to join the Government Vehicle Health Maintenance Systems team located in Hazelwood, Missouri.

  • In the Government Vehicle Health Maintenance Systems organization, our team of engineers develops, fields, and supports platform health management systems for the F/A-18, MQ-25, F-15, T-38, T-7, and proprietary platforms. Our software acquires and manages platform health and usage data, performs health and usage assessments, and recommends maintenance actions. We create and sustain products and solutions that maximize platform mission readiness and effectiveness, reduce lifecycle costs, and keep our customers safe.
  • Successful candidates will design, implement, and sustain software across all phases of the software development lifecycle to support platform health management systems. In this role, the engineer will develop cloud-based, microservice applications within a CI/CD software build pipeline and work in an Agile team to acquire and manage platform health and usage data, perform automated assessments, and produce actionable maintenance recommendations that enhance readiness, reduce lifecycle cost, and promote customer safety.

Position Responsibilities

  • Leads the design, development, test, and maintenance of non-embedded software throughout the end-to-end lifecycle that meets industry, customer, safety, and regulation standards.
  • Leads review, analysis, and translation of customer requirements into initial design of software products.
  • Coordinates the development, maintenance, enhancement and optimization of software products and functionalities for systems integrations.
  • Leads activities to develop, document and maintain architectures, requirements, algorithms, interfaces and designs for software products.
  • Debugs and leads resolution of issues identified to ensure the reliability and efficiency of software products.
  • Leads handling of user inquiries, troubleshooting technical issues and user feedback analysis.
  • Leads research and implementation of current and emerging technologies, tools, frameworks and changes in regulations relevant to software development.
  • Leads development, establishment, monitoring and improvement of software processes, tools and key performance metrics that align projects with organizational goals and industry benchmarks.
  • Leads execution and documentation of software research and development projects.
  • Consults on software domains, system-specific issues, processes and regulations.
  • Leads software project management activities and software supplier management functions.
  • Leads tracking and evaluation of software team and supplier performance to ensure product and process compliance to project plans and industry standards.
  • Required Qualifications:
  • 5 years C# development
  • 5 years working in an agile environment
  • Experience with designing and implementing new customer features
  • Bachelor's Degree
  • Preferred Qualifications:
  • 9 years C# development
  • Web development with a background in Vue
  • Cloud deployments
  • Experience working with Amazon workspaces.

Education/Experience: Education/experience typically acquired

through advanced technical education from

an accredited course of study in

engineering, computer science,

mathematics, physics or chemistry (e.g.

Bachelor) and typically 9 or more years'

related work experience or an equivalent

combination of technical education and

experience (e.g. PhD 4 years' related work

experience, Master 7 years' related work

experience). In the USA, ABET

accreditation is the preferred, although not

required, accreditation standard.

EEO Employer

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at [email protected] or 844-463-6178.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6 months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6 months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Apex team member can provide.

Apex Systems is part of the Commercial Segment of ASGN Incorporated.

NYSE: ASGN

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Apex Systems.

Salary : $55 - $60

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