Lead Application Developer – C#/.NET and AI
Location: Bridgeton, Missouri
Schedule: Hybrid onsite every Tuesday and Wednesday
Employment Type: Six-month contract-to-hire
Engagement: W2 only; no C2C
Position Overview
We are seeking a Lead Application Developer who combines strong hands-on Microsoft-stack development experience with the leadership and architectural judgment needed to drive complex initiatives forward.
This individual will support the modernization of an ocean-freight auditing platform. The team is integrating new software with a legacy system and transitioning functionality to a modern platform. The Lead Application Developer will evaluate existing code, make modifications during the transition, participate in the development of the new solution, and help support the platform as additional clients are added.
This is not solely a coding position. The successful candidate must be able to gather requirements, challenge assumptions, recommend technical solutions, manage project activities, communicate with stakeholders, mentor developers, and drive initiatives through completion.
Responsibilities
- Lead the design, development, and implementation of end-to-end application solutions
- Evaluate existing application code and make modifications during a legacy-platform conversion
- Participate in the development and implementation of the new application platform
- Translate business needs into technical requirements, architecture, and user stories
- Partner with business analysts, developers, and stakeholders throughout the project lifecycle
- Provide technical leadership and mentorship to development team members
- Challenge business and technical assumptions and recommend effective solutions
- Conduct code reviews and ensure adherence to coding and quality standards
- Develop and execute test plans to evaluate application and system performance
- Research emerging technologies and recommend tools that improve flexibility, delivery, and cost effectiveness
- Support project planning, stakeholder communication, requirements gathering, and delivery
- Apply artificial intelligence and large language model capabilities to application development and engineering workflows
- Work within Agile development practices and the complete software development lifecycle
Required Qualifications
- Five or more years of professional application-development experience
- Strong, recent hands-on experience with C# and .NET
- Strong Microsoft SQL Server and relational-database experience
- Experience with Azure
- Five or more years of business-requirements gathering and analysis experience
- Experience designing and developing internet-based systems
- Experience using Visual Studio
- Experience with source control through Azure DevOps, TFS, or Git
- Knowledge of JavaScript, HTML, CSS, and modern web-development practices
- Strong architectural, analytical, and problem-solving abilities
- Experience leading projects, mentoring developers, and conducting code reviews
- Ability to communicate technical concepts clearly to business stakeholders
- Experience with Agile methodologies and the complete software development lifecycle
- Bachelor’s degree in computer science, information systems, computer engineering, or equivalent professional experience
Artificial Intelligence Requirements
Candidates should have practical experience or a strong working understanding of one or more of the following:
- Integrating large language models into applications
- Prompt engineering or model fine-tuning
- Generative AI and agentic AI development
- AI-assisted requirements analysis and story creation
- Claude Code, GitHub Copilot, Cursor, Devin, or similar AI development tools
- AI-assisted code generation, validation, testing, or refactoring
Preferred Qualifications
- React experience
- Angular, AngularJS, or TypeScript experience
- Experience modernizing or integrating legacy applications
- Experience with transportation, freight auditing, invoice processing, or payment systems
- Knowledge of data privacy requirements and best practices
Candidates must be local to the Bridgeton, Missouri area and available to work onsite every Tuesday and Wednesday.
Pay: $120,000.00 - $130,000.00 per year
Benefits:
- 401(k) matching
- Dental insurance
- Health insurance
- Life insurance
- Paid time off
- Vision insurance
Work Location: Hybrid remote in Bridgeton, MO 63044
