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# Application Developer - Senior (C# and .Net)

- **Company:** BAE Systems
- **Location:** Westminster, CO, United States
- **Experience:** Expert
- **Salary:** $97,008 - $164,914
- **Contract:** Permanent contract
- **Skills:** Testing (Software), .NET Framework, Application Integration Architecture, Automation of Tests, Unit Testing, Behavior-Driven Development, Code Review, Data Structures, Relational Databases, Software Debugging, Software Design Patterns, Entity Framework, Python (Programming Language), Microsoft SQL Server, Object-Oriented Software Development, Software Engineering, Software Requirements Analysis, Test-Driven Development (TDD), Information Technology, Deployment Automation, Restful APIs, Software Version Control, Aras Innovator, Web Api
- **Published:** November 9, 2026
- **Apply:** https://jobs.baesystems.com/global/en/job/129459BR

## About the Role

* Bachelor's degree in computer science or related technical field and at least 4 or more years of related experience, or equivalent combination of education and experience.
 * Three or more years of experience in application development with C# and .Net.
 * Demonstrated knowledge of Web API REST services, and application integrations.
 * Strong understanding of object-oriented design, data structures, algorithms, and common software design patterns.
 * Experience utilizing Agile/Scrum Methodologies.
 * Experience with source control, code reviews, testing, debugging, and the Software Development Lifecycle.
 * Experience with relational databases preferably Microsoft SQL.
 * Strong analytical, problem solving, and collaborative skills.
 * Familiarity with Unit Testing/Test Driven Development/Behavior Driven Design.
 * Experience with Entity Framework or equivalent ORMs.

Preferred Education, Experience, & Skills Preferred Experience & Skills

 * Experience with Python
 * Experience with PLM and manufacturing applications, including implementation and software development.
 * Familiarity with Aras Innovator or other PLM systems.
 * Experience with UX design.
 * Experience with CI/CD pipelines and automated deployments.

#LI-DM2
#LI-Hybrid

## Description

* Lead, assist, and collaborate with other application developers, business analysts, system administrators, and others in conceptualizing and developing new software programs and applications as well as maintaining existing applications.
 * Collaborate with specialists from a wide variety of expertise including mechanical engineering, material science, optical engineering, and other information technology team members.
 * Plan phases of the software development life cycle (SDLC) for a variety of projects.
 * Assist in the preparation and documentation of software requirements and specifications.
 * Research and document requirements of software users.

 * Conduct research on emerging application development best practices, languages, and standards in support of development efforts.
 * Partner with business representatives to ensure requirements are well understood and documented to achieve successful delivery.
 * Actively work with the software development manager and architecture managers to align to a consistent technology vision and drive application development standards.
 * Facilitate peer-programming and design sessions/reviews with team members.
 * Participate in code reviews.
 * Foster and be a leader of a collaborative and team-oriented environment.
 * Ensure development quality is being tracked and improved using techniques like automated testing and peer code review.
 * Take the lead on solving and implementing difficult technology challenges and drive our team to successful delivery.
 * Consistently write, translate, code, and test software program and applications according to specifications.
 * Establish and maintain effective working relationships within the department, the Strategic Business Units, Strategic Support Units, and the Company.
 * Interact appropriately with others to maintain a positive and productive work environment.