Full-stack Application Developer with experience building and maintaining business-critical applications across healthcare and enterprise environments. Skilled in API integrations, backend services, data pipelines, and modernizing legacy systems using Python, Node.js, React, C#, and SQL Server.

Lucas Gallagher

Full-stack Application Developer with experience building and maintaining business-critical applications across healthcare and enterprise environments. Skilled in API integrations, backend services, data pipelines, and modernizing legacy systems using Python, Node.js, React, C#, and SQL Server.

Available to hire

Full-stack Application Developer with experience building and maintaining business-critical applications across healthcare and enterprise environments. Skilled in API integrations, backend services, data pipelines, and modernizing legacy systems using Python, Node.js, React, C#, and SQL Server.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert

Language

Javanese
Intermediate

Work Experience

Application Developer at ENT And Allergy Associates
January 1, 2022 - Present
Designed, developed, and maintained internal web applications supporting Billing, Marketing, HR, Operations, and Credentialing teams. Built and enhanced full-stack JavaScript applications (Node.js, React, TypeScript) deployed on IIS, delivering UI and backend services. Maintained and extended legacy PHP systems while assisting modernization toward Node.js architectures. Developed Python services to integrate with third-party APIs and ingest external data sources (APIs, Excel, flat files), transforming and persisting data into SQL Server. Implemented RESTful APIs using Python and Flask for internal services and third-party integrations. Built C#/.NET backend services to securely interface with external APIs and internal systems. Optimized SQL Server stored procedures supporting high-volume billing workflows and refactored embedded SQL into stored procedures. Created data pipelines for importing, validating, and exposing credentialed insurance and billing data. Automated recurring work
Innovation Software Developer Intern (Corporate Information Systems) at Marsh & McLennan
May 1, 2021 - September 1, 2021
Built a full-stack component integrating with a Finance system used by Controllers and Treasurers. Developed a React component that fetches data from a PostgreSQL database to provide real-time insights. Optimized data fetching for performance and integrated PostgreSQL data with React using Axios and state management (Redux/Context). Collaborated with backend developers to define API endpoints and data models aligned to frontend requirements.
Summer Internship (Extended to Winter) at CareMount Health Solutions
May 1, 2019 - December 31, 2019
Special projects reporting to the CIO, including data analysis and interpretation, application testing, and assistance with PC imaging and testing. Reconciled financial systems and supported other general IT activities.

Education

B.S. in Computer Science (Network Security concentration) at New York Institute of Technology
January 1, 2018 - January 1, 2021

Qualifications

Add your qualifications or awards here.

Industry Experience

Healthcare, Software & Internet, Financial Services

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert

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