TS-cleared Senior Web Application Developer

Company Description

True Tandem's mission is to be a trusted information technology solutions provider, committed to the success of our customers, communities and employees. To enable this mission, we listen to our customers’ needs, empower our dedicated and talented employees, envision success together, and deliver innovative cost‑effective solutions. For our customers, we aim to deliver more power to meet their business outcomes through technology implementation, integration, optimization and customization.

We enable some of the most well‑known companies, nonprofits and federal agencies in the United States to intelligently plan and develop their applications, modernize their infrastructure and manage their data.

We are currently seeking an experienced, skilled, and passionate Senior Web Application Developer to support development projects at a U.S. Federal government agency. The Senior Web Application Developer will be responsible for designing, developing, and maintaining web applications. This role requires a deep understanding of web development best practices, and the ability to work collaboratively with cross‑functional teams to deliver high‑quality solutions.

Ideal candidates possess the technology skills, curiosity, and experience to drive web development through all parts of the application lifecycle.

• Maintain, modernize, and refactor web applications for improved scalability, performance, and maintainability.
• Develop clean, efficient, and modular code following best practices in React.js, Node.js, JavaScript, HTML, and CSS.
• Refactor and optimize legacy code, improving readability, reducing technical debt, and enhancing maintainability.
• Enhance data‑driven applications, building dashboards, automated workflows, and visualizations.
• Optimize SQL queries and database performance while ensuring security and best practices (SQL Server and Oracle).
• Collaborate with stakeholders to define technical requirements and implement scalable, modern solutions.
• Work within Agile methodologies (Scrum, XP, Kanban) to deliver high‑quality solutions efficiently.
• Conduct code reviews, mentor junior developers, and promote continuous improvement.
• Support decision‑making through actionable reports, analytics, and data‑driven insights.

• 5+ years of experience in web application development, modernization, and refactoring.
• Active Top Secret Clearance.
• Proficiency in React, Node.js, JavaScript/HTML/CSS, and SQL (SQL Server and Oracle).
• Experience developing and integrating RESTful APIs.
• Experience in clean coding practices, including modular design, reuse, and performance optimization.
• Strong ability to analyze, refactor, and improve legacy applications.
• Experience with Git or other version control systems.
• Excellent problem‑solving, communication, and collaboration skills.

• Experience with SQL Server or Oracle v19 for data management.
• Familiarity with Cold Fusion and frameworks like Cold Box or FW/1.
• Exposure to Python, Next.js, R, ASP.NET, or C# for full‑stack development.
• Basic knowledge of Linux (RHEL) administration for system support.
• Comfort with Confluence or project collaboration tools.
• A knack for optimizing processes and improving workflows.
• Some familiarity with Dev Ops concepts (CI/CD, automation).

True Tandem is an equal opportunity employer, committed to diversity and inclusion in the workplace and affords equal opportunity to all qualified applicants for all positions without regard to protected veteran status, qualified individuals with disabilities and all individuals without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age or any other status protected under local, state or federal laws.

Equal Opportunity Employer - Minorities/Females/Disabled/Veterans