Sr. Web Application Developer

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 /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 (e.g. generative AI APIs or data-driven models) 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.

Primary Responsibilities

Full-Stack Architecture & Technical Leadership

• Lead the architecture design and development of modern web applications across a diverse technology stack /C# 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 & DevOps Enablement

• Architect and deploy applications in AWS and Azure leveraging serverless and containerized services.
• Lead CI/CD pipeline implementation and DevSecOps practices.
• Optimize systems for scalability reliability and cost efficiency in cloud environments.

Team Leadership & Mentorship

• Mentor developers across multiple technology stacks not limited .
• 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).
• Bachelors or Masters degree in Computer Science Information Technology or related field (or equivalent experience).
• 8 years of experience in full-stack web application development /C# and modern JavaScript frameworks.
• Demonstrated experience working across multiple web technologies (e.g. Python or similar).
• Strong hands-on experience with T-SQL including writing and optimizing SQL queries stored procedures triggers functions and other database objects.
• Demonstrated commitment to built-in quality including developing reliable maintainable and well-tested solutions that meet performance security and coding standards.
• Ability to follow development best practices conduct code reviews troubleshoot issues and ensure deliverables meet quality expectations throughout the development lifecycle.
• Hands-on experience integrating or developing AI/ML capabilities such as:
  • Working with AI APIs (Azure OpenAI AWS Bedrock etc.)
  • Implementing data-driven or intelligent application features
• Strong experience with AWS and/or Azure cloud platforms including serverless architectures.
• Deep understanding of web architecture microservices and RESTful API design.
• Experience with SQL and NoSQL databases.
• Proven ability to lead teams and engage directly with clients.
• Strong communication skills with the ability to bridge business needs and technical solutions.
• Knowledge of secure application development and cloud security practices.

Preferred Qualifications

• Certifications in AWS Azure or AI/ML-related technologies.
• Experience building or integrating generative AI solutions in production environments.
• Familiarity with Python for AI/ML workflows.
• Experience with DevSecOps CI/CD pipelines and automation tools.
• Prior experience in client-facing technical leadership roles within complex or mission-driven environments.

AppMod

If youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.

Original Posting:

Pay Range:

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.