.NET & React Full Stack Developer

Applied Information Sciences; United States; On-site; USD 100,000 - 150,000; Full time

Job summary

Applied Information Sciences is seeking a Senior .NET & React Full Stack Developer to join our team supporting a mission-critical federal client in Washington, DC. You will design, develop, test, and maintain secure web applications using C#, ASP.NET, React, and SQL Server, collaborating with clients and internal teams.

The role emphasizes ownership, code quality, security, and continuous learning in a fast-paced consulting environment.

Qualifications

• Active Top Secret clearance is required.
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 3–5 years of professional software development experience using C# and the .NET framework.
• Hands-on experience with ASP.NET, Entity Framework, and SQL Server.
• Experience developing front-end applications or components using React, JavaScript/TypeScript, HTML, and CSS.
• Familiarity with architectural patterns and API styles, including REST and/or RPC.
• Experience integrating front-end components with back-end services and APIs.

Responsibilities

• Design, develop, test, and maintain full-stack application features using C#, ASP.NET, Entity Framework, SQL Server, React, JavaScript/TypeScript, HTML, and CSS.
• Build responsive, user-friendly front-end interfaces using React and modern UI development practices.
• Develop scalable and secure backend components and APIs to support application functionality.
• Modify and enhance existing code to improve performance, usability, and maintainability.
• Integrate third-party tools, APIs, and services as needed.
• Participate in the full software development lifecycle (SDLC), including planning, requirements analysis, development, testing, and deployment.
• Write clean, maintainable, and secure code aligned with best practices and team guidelines.
• Conduct unit and integration testing to ensure functionality and reliability.
• Troubleshoot and resolve application, integration, and performance issues.
• Use Git/GitLab for version control, branching, and team collaboration.
• Assist with remediation of code and package vulnerabilities identified through security scans.

Skills

C#

.NET

React

JavaScript/TypeScript

REST APIs

GitLab

Security practices

Unit testing

Education

Bachelor’s degree in Computer Science / Software Engineering / IT

Tools

ASP.NET

Entity Framework

SQL Server

GitLab

Docker

Azure / AWS

Job description

Why AIS?

When you join AIS, you’re joining a mission-driven team that’s passionate about making a difference. You’ll work on projects that matter, alongside industry-leading experts, in an environment that fosters innovation, driving client success, and empowering our team to make a lasting impact. As an employee-owned company, we value collaboration, inclusivity, continuous growth, and shared success.

• Employee Ownership : Your contributions directly impact the company’s success, and you share in its achievements.

• Continuous Learning : Access to resources, training, and mentorship to support your professional growth.

• Inclusive Culture : A workplace where diversity is celebrated, and everyone’s voice is valued.

• Mission-Driven Work : Engage in projects that make a meaningful difference for our clients and communities.

What are we looking for?

At AIS, we’re looking for more than just skills - we’re looking for driven individuals who are passionate about making a difference, eager to grow, and aligned with our core principles.

Working@AIS

At AIS, we are dedicated to providing a diverse opportunities to grow careers while supporting impactful projects. For this position, we are seeking a talented individual to join AIS as a Senior Software Engineer.

• Core Knowledge & Skills: Works across multiple languages and platforms, designs and implements architectural decisions, applies design patterns, cloud-native services, IAAS/PAAS/SAAS basics, and secure coding practices (e.g., OWASP Top 10).

• Work & Complexity: Performs complex tasks under limited guidance, integrates and troubleshoots distributed or cloud services, and optimizes performance and scalability.

• Quality & Independence: Sets a high bar for code quality, multitasks effectively, owns and corrects errors quickly, and drives continuous improvement.

• Teamwork & Communication: Leads code reviews, mentors teammates, and translates technical concepts for non-technical stakeholders.

• Consulting & Engagement: Works directly with clients without oversight, writes technical RFP content when needed, nurtures client relationships, and manages routine client concerns.

As your initial project assignment, you will support the unique needs of our client as a .NET & React Full Stack Developer.

Project Summary

AIS is seeking a .NET & React Full Stack Developer to join our team and support a mission-critical federal client in Washington, DC.

In this role, you will contribute to the development, enhancement, and maintenance of secure web applications and services that support high-impact operations. You will work hands‑on with the .NET framework and modern front‑end technologies to build clean, efficient, and reliable solutions that integrate seamlessly across backend, frontend, and cloud environments.

Key Responsibilities

• Design, develop, test, and maintain full-stack application features using C#, ASP.NET, Entity Framework, SQL Server, React, JavaScript/TypeScript, HTML, and CSS
• Build responsive, user-friendly front‑end interfaces using React and modern UI development practices
• Develop scalable and secure backend components and APIs to support application functionality
• Modify and enhance existing code to improve performance, usability, and maintainability
• Integrate third‑party tools, APIs, and services as needed
• Participate in the full software development lifecycle (SDLC), including planning, requirements analysis, development, testing, and deployment
• Write clean, maintainable, and secure code aligned with best practices and team guidelines
• Conduct unit and integration testing to ensure functionality and reliability
• Troubleshoot and resolve application, integration, and performance issues
• Use Git/GitLab for version control, branching, and team collaboration
• Assist with remediation of code and package vulnerabilities identified through security scans

Required For This Opportunity

• ActiveTop Secretclearance isrequired
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field
• 3–5 years of professional software development experience using C# and the .NET framework
• Hands‑on experience with ASP.NET, Entity Framework, and SQL Server
• Experience developing front‑end applications or components using React, JavaScript/TypeScript, HTML, and CSS
• Familiarity with architectural patterns and API styles, including REST and/or RPC
• Experience integrating front‑end components with back‑end services and APIs

Nice to Have Skills

• Experience with cloud platforms such as AWS or Azure
• Basic understanding of DevOps practices or exposure to CI/CD pipelines (GitLab preferred)
• Experience working with Object‑Relational Mappers (ORMs) such as Entity Framework
• Knowledge of relational or NoSQL database design principles
• Experience with containerization tools such as Docker
• Exposure to UI component libraries or modern front‑end design patterns
• Relevant certifications in .NET development, React/front-end development, cloud technologies, or software engineering. At AIS, we are committed to offering competitive and fair compensation that reflects the skills, the skills, and experience. The targeted base salary range for this role is $100,000-$150,000 per year. Please note that this range is provided as a guideline and the final offer will be based on several factors, including but not limited to, skillset and competencies, level of experience, education, certifications, and location. We value transparency in our hiring process and are happy to discuss how your unique qualifications align with our compensation structure during the interview process.

Applied Information Sciences does not discriminate on the basis of race, national origin, religion, color, gender, sexual orientation, age, disability, protected veteran status, or any other basis. Employment decisions are based solely on qualifications, merit, and business needs.