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Sr. Web Application Developer

Job in Indiana Borough, Indiana County, Pennsylvania, 15705, USA
Listing for: Leidos
Full Time position
Listed on 2026-07-13
Job specializations:
  • Software Development
    Full Stack Developer, AI Engineer (Applied/Software), Software Architect
Salary/Wage Range or Industry Benchmark: 100000 - 130000 USD Yearly USD 100000.00 130000.00 YEAR
Job Description & How to Apply Below

Overview

We are seeking a highly experienced Senior Web Application Developer to serve as a technical leader, client liaison, and AI-enabled solutions engineer. This role requires a well-rounded full-stack background across modern web technologies, including but not limited to .NET/C#, JavaScript frameworks, cloud-native architectures, and emerging AI/ML integrations.

The ideal candidate brings 8+ years of experience building scalable web applications, combined with hands-on experience incorporating AI/ML capabilities into production systems. This individual will act as a trusted advisor to clients, shaping technical direction while leading engineering teams to deliver innovative, secure, and high-performing solutions.

Responsibilities
  • Full-Stack Architecture & Technical Leadership:
    Lead the architecture, design, and development of modern web applications across a diverse technology stack, including .NET/C#, Node.js, and front-end frameworks (React, Angular, Vue). Design and implement scalable, cloud-native solutions using microservices and serverless architectures. Establish and enforce engineering best practices, coding standards, and architectural patterns across teams.
AI/ML Integration & Intelligent Solutions
  • Design and implement AI-enabled application features, such as:
    Integration with LLMs and AI APIs (e.g., Azure OpenAI, AWS Bedrock, or similar platforms);
    Intelligent search, summarization, recommendation systems, or automation workflows.
  • Collaborate with stakeholders to identify opportunities where AI can enhance user experience, decision-making, or operational efficiency.
  • Ensure responsible and secure use of AI technologies, including data privacy, governance, and model evaluation.
Client Engagement & Technical Strategy
  • Serve as a primary technical interface to clients, translating business needs into scalable technical solutions.
  • Lead solutioning sessions, architecture discussions, and technical briefings with stakeholders.
  • Provide strategic guidance on modern web technologies, cloud adoption, and AI integration.
  • Build strong client relationships as a trusted technical advisor.
Advanced Web Application & API Development
  • Oversee development of secure, high-performance web applications and RESTful APIs.
  • Ensure interoperability and cross-platform integration across systems.
  • Drive best practices in API design, versioning, and performance optimization.
Cloud & Dev Ops Enablement
  • Architect and deploy applications in AWS and Azure, leveraging serverless and containerized services.
  • Lead CI/CD pipeline implementation and Dev Sec Ops  practices.
  • Optimize systems for scalability, reliability, and cost efficiency in cloud environments.
Team Leadership & Mentorship
  • Mentor developers across multiple technology stacks, not limited to .NET.
  • Lead code reviews, architecture reviews, and technical decision-making.
  • Foster a culture of innovation, continuous learning, and engineering excellence.
Security, Performance & Quality
  • Ensure applications meet modern security standards, including secure API design and cloud security best practices.
  • Implement comprehensive testing strategies and performance monitoring.
  • Continuously improve system resilience, scalability, and maintainability.
UI/UX & Modern Web Practices
  • Collaborate with UI/UX teams to deliver responsive, accessible, and user-centric applications.
  • Drive adoption of modern front-end architecture and performance optimization techniques.
Innovation & Continuous Improvement
  • Stay current with emerging web and AI technologies, evaluating their applicability to client missions.
  • Introduce new tools, frameworks, and AI capabilities to improve delivery and innovation.
Basic Qualifications
  • Must be able to obtain a Public Trust prior to starting (US Citizenship Required).
  • Bachelor’s or Master’s degree in Computer Science, Information Technology, or related field (or equivalent experience).
  • 8+ years of experience in full-stack web application development, including .NET/C# and modern JavaScript frameworks.
  • Demonstrated experience working across multiple web technologies beyond .NET (e.g., Node.js, Python, or similar).
  • Strong hands-on experience with T-SQL, including writing and optimizing SQL…
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