Senior Application Developer

Position Title: Senior Application Developer Location: Suitland, MarylandSchedule: Full-time WINTrio seeks a Senior Application Developer to maintain and modernize business-critical web applications and data services. The environment includes interactive data tables, public APIs, online ordering and payment integrations, administrative interfaces, and historical data applications. Responsibilities Develop, enhance, troubleshoot, and maintain frontend and backend application components. Resolve production defects, remediate security vulnerabilities, and improve performance. Integrate new datasets and enhance data retrieval, presentation, and exchange. Modernize legacy code and support application migration to updated server environments. Develop administrative interfaces, dashboards, and application metrics. Maintain shopping-cart workflows and payment-service integrations. Develop and optimize SQL queries and database interactions. Perform code reviews, unit and integration testing, regression testing, and deployment verification. Maintain source code, build pipelines, release procedures, and technical documentation. Apply secure development, accessibility, and configuration management practices. Qualifications Demonstrated experience developing and maintaining production web applications and database-backed services. Strong Microsoft SQL Server skills. Experience with C#/ASP.NET or Adobe ColdFusion. Proficiency in JavaScript, HTML, and CSS. Experience developing or integrating APIs and handling JSON, XML, and CSV data. Ability to troubleshoot application code, database queries, and web-server configurations. Experience with version control, testing, and controlled software releases. Preferred Experience Experience supporting applications or IT projects in the economic and statistical analysis domain, particularly systems used to collect, process, validate, analyze, and disseminate economic statistics. Work Environment Full-time, fully remote position. Work supports a Federal Government program. Standard hours are expected to align with U.S. business hours. Video participation is expected for interviews, standups, sprint ceremonies, working sessions, and stakeholder meetings. Occasional after-hours support may be required for releases or deployments. All work must be performed within the United States. WINTrio Benefits Medical, Dental, and Vision coverage FSA and HSA 401(k) and Retirement Savings Plan Annual Bonus and Profit-Sharing Opportunities Paid Time Off and Vacation Employee Assistance Program Life and Disability Insurance Growth Opportunities This role provides hands-on experience supporting a long-term Federal Government digital modernization program using Salesforce, modern web technologies, accessibility standards, analytics platforms, and cloud-based development practices. Equal Opportunity Employer WINTrio LLC is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender identity, sexual orientation, national origin, age, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.