Web Developer (TS/SCI CI Poly)

Seamless Migration•Chantilly, VA

1d•Onsite

About The Position

Seamless Migration is seeking a career- and customer-oriented Web Developer to join its team in Chantilly, Virginia. The role builds, enhances, and maintains web-based applications supporting a government customer. The developer works across a portfolio of more than 100 applications and uses technologies including HTML5, JavaScript, Bootstrap, CSS, C#/.NET, and SQL to turn business needs into functional, user-focused solutions. Work may involve developing features, troubleshooting defects, creating web API integrations, supporting data conversion, and exploring technical solutions, including responsible use of AI-assisted development tools such as Roo Code. The developer designs, develops, enhances, tests, and maintains custom, commercial off-the-shelf (COTS), and government off-the-shelf (GOTS) applications. The position collaborates with business analysts, UI/UX developers, subject matter experts, and technical team members to translate functional requirements into effective application solutions. It also supports AWS-based application development and deployment, follows program standards and formal testing processes, and works to deliver reliable, maintainable solutions that support application performance, usability, security, and long-term supportability. An existing TS/SCI clearance with CI Polygraph is required to start. The position is located in Chantilly, VA.

Requirements

At least two years of relevant web development or software development experience.
Hands-on experience with HTML, JavaScript, and CSS.
Experience developing web applications using C#/.NET and Bootstrap.
Experience using AWS services to develop, deploy, troubleshoot, or support cloud-based applications.
Working knowledge of SQL, web development principles, programming practices, and coding standards.
Ability to manage competing priorities, troubleshoot technical issues, and work effectively in a dynamic team environment.
Self-motivated, with the ability to identify tasks, take initiative, and contribute to team objectives.
Existing TS/SCI clearance with CI Polygraph required to start.

Nice To Haves

Bachelor’s degree in Computer Science, Information Systems, Software Engineering, or a related field, or equivalent work experience.
AWS certification, such as AWS Certified Developer – Associate or AWS Certified DevOps Engineer – Professional.
Experience with Python.
Familiarity with Agile software development methodologies and practices.
Experience using AI-assisted development tools or interest in applying AI to software development workflows.
Knowledge of or experience supporting Department of Defense (DoD) or Intelligence Community (IC) environments.
Familiarity with responsive web design, web accessibility, or Section 508 requirements.
CompTIA Security+ certification.

Responsibilities

Design, develop, enhance, test, and maintain web-based applications, including COTS and GOTS solutions.
Collaborate with business analysts, UI/UX developers, subject matter experts, and technical team members to translate functional requirements into application solutions.
Estimate development and enhancement efforts and assess the potential impact of proposed software changes.
Develop technical specifications, write maintainable application code, and perform unit testing.
Build and maintain web APIs, application interfaces, data-conversion routines, and SQL-based data solutions.
Use AWS services to develop, deploy, monitor, and support cloud-based applications.
Follow program configuration management, change-control, coding, and release-management standards.
Participate in formal testing; troubleshoot application issues using code, logs, data, and system behavior; and resolve defects before code is promoted to production.
Identify opportunities to improve application performance, usability, security, and long-term maintainability.
Stay current with application features, technical updates, modern development practices, and responsible uses of AI-assisted development tools.