Web Application Developer
North America
September 25, 2026 at 2:35 PM
✨ AI summary
Location
- United States
Programming Languages
- C#
- JavaScript
- T-SQL
Frameworks
- React
- Angular
- Vue
- .NET
Cloud Services
- AWS
- Azure
Databases
- SQL Server
Experience Level
- 8+ years
About The Company
Leidos is a premier industry leader dedicated to delivering innovative digital solutions and mission-critical services to both government and commercial clients worldwide. Headquartered in Reston, Virginia, Leidos employs approximately 47,000 professionals globally and reported annual revenues of around $16.7 billion for the fiscal year ending January 3, 2025. The company prides itself on fostering a culture of innovation, integrity, and excellence, continuously pushing the boundaries of technology to address complex challenges and improve operational efficiency. Leidos’s commitment to leveraging cutting-edge technologies such as cloud computing, artificial intelligence, and data analytics positions it as a forward-thinking organization that drives impactful solutions across diverse sectors.
About The Role
We are seeking a highly experienced Senior Web Application Developer to join our dynamic team at Leidos. This role serves as a technical leader, client liaison, and AI-enabled solutions engineer, responsible for designing, developing, and deploying scalable, secure, and high-performance web applications. The ideal candidate will possess a comprehensive full-stack background, with expertise spanning modern web technologies including .NET/C#, JavaScript frameworks, cloud-native architectures, and AI/ML integrations. You will act as a trusted advisor to clients, translating business needs into innovative technical solutions while leading engineering teams toward excellence. Your role will involve shaping technical strategies, guiding development best practices, and ensuring the delivery of secure, reliable, and cutting-edge solutions that meet the evolving demands of our clients and the industry.
Qualifications
The ideal candidate will have a minimum of 8 years of experience in full-stack web application development, with demonstrated expertise in .NET/C# and modern JavaScript frameworks such as React, Angular, or Vue. A bachelor’s or master’s degree in Computer Science, Information Technology, or a related field is required, or equivalent practical experience. Strong hands-on skills in T-SQL, including writing and optimizing complex queries, stored procedures, and database objects, are essential. Experience integrating AI/ML capabilities, working with APIs like Azure OpenAI or AWS Bedrock, and deploying solutions on cloud platforms such as AWS and Azure is highly desirable. Candidates must also possess excellent communication skills, with a proven ability to lead teams and engage directly with clients. Security awareness, adherence to best practices, and a commitment to quality are fundamental to success in this role.
Responsibilities
Lead the architecture, design, and development of modern web applications utilizing a diverse technology stack, including .NET/C#, Node.js, and front-end frameworks such as React, Angular, or Vue. Design and implement scalable, cloud-native solutions leveraging microservices and serverless architectures, ensuring optimal performance and reliability. Establish and enforce engineering standards, coding practices, and architectural patterns across development teams to maintain high-quality deliverables.
Design and implement AI-enabled features, including integration with large language models (LLMs) and AI APIs like Azure OpenAI and AWS Bedrock. Develop intelligent search, summarization, recommendation systems, and automation workflows that enhance user experience and operational efficiency. Collaborate with stakeholders to identify opportunities for AI integration, ensuring responsible use with a focus on data privacy, governance, and model evaluation.
Serve as the primary technical interface with clients, translating their business needs into scalable technical solutions. Lead solutioning sessions, architecture discussions, and technical briefings, providing strategic guidance on web technologies, cloud adoption, and AI integration. Build and maintain strong client relationships as a trusted advisor, ensuring solutions align with their strategic objectives.
Oversee the development of secure, high-performance web applications and RESTful APIs, ensuring interoperability and cross-platform compatibility. Drive best practices in API design, versioning, and performance optimization. Architect and deploy applications in AWS and Azure, leveraging serverless and containerized services, and lead CI/CD pipeline implementation adhering to DevSecOps principles.
Mentor and lead development teams across multiple technology stacks, fostering a culture of innovation, continuous learning, and engineering excellence. Conduct code reviews, architecture reviews, and technical decision-making, ensuring adherence to security and quality standards. Collaborate with UI/UX teams to deliver responsive, accessible, and user-centric applications, adopting modern front-end practices for performance and usability.
Stay current with emerging web and AI/ML technologies, evaluating their applicability to client needs. Introduce new tools, frameworks, and AI capabilities to enhance delivery, efficiency, and innovation. Continuously improve system resilience, scalability, and maintainability through proactive monitoring, testing, and optimization efforts.
Benefits
Leidos offers a comprehensive benefits package designed to support your health, well-being, and professional growth. Employees enjoy competitive compensation aligned with industry standards, along with health and wellness programs, income protection, paid leave, and retirement plans. We foster a collaborative and inclusive work environment that encourages innovation and recognizes individual contributions. Opportunities for continuous learning, professional development, and career advancement are integral to our culture. Additionally, Leidos provides flexible work arrangements and resources to support a healthy work-life balance, ensuring our team members are empowered to excel both professionally and personally.
Equal Opportunity
Leidos is committed to fostering an inclusive and diverse workplace where all individuals are valued and respected. We provide equal employment opportunities regardless of sex, race, ethnicity, age, national origin, citizenship, religion, disability, medical condition, genetic information, pregnancy, family status, marital status, sexual orientation, gender identity or expression, veteran or military status, or any other protected characteristic under applicable law. We believe that diversity enhances our ability to innovate and deliver exceptional solutions to our clients. All qualified applicants will
Leidos is a premier industry leader dedicated to delivering innovative digital solutions and mission-critical services to both government and commercial clients worldwide. Headquartered in Reston, Virginia, Leidos employs approximately 47,000 professionals globally and reported annual revenues of around $16.7 billion for the fiscal year ending January 3, 2025. The company prides itself on fostering a culture of innovation, integrity, and excellence, continuously pushing the boundaries of technology to address complex challenges and improve operational efficiency. Leidos’s commitment to leveraging cutting-edge technologies such as cloud computing, artificial intelligence, and data analytics positions it as a forward-thinking organization that drives impactful solutions across diverse sectors.
About The Role
We are seeking a highly experienced Senior Web Application Developer to join our dynamic team at Leidos. This role serves as a technical leader, client liaison, and AI-enabled solutions engineer, responsible for designing, developing, and deploying scalable, secure, and high-performance web applications. The ideal candidate will possess a comprehensive full-stack background, with expertise spanning modern web technologies including .NET/C#, JavaScript frameworks, cloud-native architectures, and AI/ML integrations. You will act as a trusted advisor to clients, translating business needs into innovative technical solutions while leading engineering teams toward excellence. Your role will involve shaping technical strategies, guiding development best practices, and ensuring the delivery of secure, reliable, and cutting-edge solutions that meet the evolving demands of our clients and the industry.
Qualifications
The ideal candidate will have a minimum of 8 years of experience in full-stack web application development, with demonstrated expertise in .NET/C# and modern JavaScript frameworks such as React, Angular, or Vue. A bachelor’s or master’s degree in Computer Science, Information Technology, or a related field is required, or equivalent practical experience. Strong hands-on skills in T-SQL, including writing and optimizing complex queries, stored procedures, and database objects, are essential. Experience integrating AI/ML capabilities, working with APIs like Azure OpenAI or AWS Bedrock, and deploying solutions on cloud platforms such as AWS and Azure is highly desirable. Candidates must also possess excellent communication skills, with a proven ability to lead teams and engage directly with clients. Security awareness, adherence to best practices, and a commitment to quality are fundamental to success in this role.
Responsibilities
Lead the architecture, design, and development of modern web applications utilizing a diverse technology stack, including .NET/C#, Node.js, and front-end frameworks such as React, Angular, or Vue. Design and implement scalable, cloud-native solutions leveraging microservices and serverless architectures, ensuring optimal performance and reliability. Establish and enforce engineering standards, coding practices, and architectural patterns across development teams to maintain high-quality deliverables.
Design and implement AI-enabled features, including integration with large language models (LLMs) and AI APIs like Azure OpenAI and AWS Bedrock. Develop intelligent search, summarization, recommendation systems, and automation workflows that enhance user experience and operational efficiency. Collaborate with stakeholders to identify opportunities for AI integration, ensuring responsible use with a focus on data privacy, governance, and model evaluation.
Serve as the primary technical interface with clients, translating their business needs into scalable technical solutions. Lead solutioning sessions, architecture discussions, and technical briefings, providing strategic guidance on web technologies, cloud adoption, and AI integration. Build and maintain strong client relationships as a trusted advisor, ensuring solutions align with their strategic objectives.
Oversee the development of secure, high-performance web applications and RESTful APIs, ensuring interoperability and cross-platform compatibility. Drive best practices in API design, versioning, and performance optimization. Architect and deploy applications in AWS and Azure, leveraging serverless and containerized services, and lead CI/CD pipeline implementation adhering to DevSecOps principles.
Mentor and lead development teams across multiple technology stacks, fostering a culture of innovation, continuous learning, and engineering excellence. Conduct code reviews, architecture reviews, and technical decision-making, ensuring adherence to security and quality standards. Collaborate with UI/UX teams to deliver responsive, accessible, and user-centric applications, adopting modern front-end practices for performance and usability.
Stay current with emerging web and AI/ML technologies, evaluating their applicability to client needs. Introduce new tools, frameworks, and AI capabilities to enhance delivery, efficiency, and innovation. Continuously improve system resilience, scalability, and maintainability through proactive monitoring, testing, and optimization efforts.
Benefits
Leidos offers a comprehensive benefits package designed to support your health, well-being, and professional growth. Employees enjoy competitive compensation aligned with industry standards, along with health and wellness programs, income protection, paid leave, and retirement plans. We foster a collaborative and inclusive work environment that encourages innovation and recognizes individual contributions. Opportunities for continuous learning, professional development, and career advancement are integral to our culture. Additionally, Leidos provides flexible work arrangements and resources to support a healthy work-life balance, ensuring our team members are empowered to excel both professionally and personally.
Equal Opportunity
Leidos is committed to fostering an inclusive and diverse workplace where all individuals are valued and respected. We provide equal employment opportunities regardless of sex, race, ethnicity, age, national origin, citizenship, religion, disability, medical condition, genetic information, pregnancy, family status, marital status, sexual orientation, gender identity or expression, veteran or military status, or any other protected characteristic under applicable law. We believe that diversity enhances our ability to innovate and deliver exceptional solutions to our clients. All qualified applicants will