Senior .NET Developer - Healthcare EDI & AI Tools

Gallagher; San Diego (CA); On-site; Confidential; Full time

Job summary

Gallagher is seeking an experienced Senior Software Developer to join our engineering team in San Diego, focusing onHealthcare Insurance and EDI for medical operations. You will design, implement, and maintain EDI processing systems, APIs, and HIPAA-compliant solutions, collaborating with analytics and operations teams to deliver scalable, secure software.

You will leverage AI-assisted tools to boost productivity while ensuring high code quality and reliability.

Qualifications

• 7+ years of software development experience with C# and .NET Framework/.NET Core.
• Experience with AI‑assisted development tools such as Claude Code, GitHub Copilot, Cursor, or similar platforms.
• Strong experience designing and implementing RESTful APIs and third‑party system integrations.
• Proficiency with modern development tools and practices including Git, CI/CD pipelines, containerization, and cloud‑native architectures.
• 3+ years of hands‑on experience with healthcare EDI transactions (X12 standards: 837, 835, 270/271, 276/277, 834).
• Strong proficiency in the Microsoft technology stack: ASP.NET Core, SQL Server, Azure services.
• Deep understanding of HIPAA regulations and healthcare data security requirements.
• Proven experience with full SDLC methodologies including Agile/Scrum.
• Demonstrated ability to manage stakeholder expectations and communicate technical concepts to non‑technical audiences.
• Experience with EDI translation software and healthcare clearinghouse integrations.
• Strong problem‑solving skills and attention to detail in complex healthcare data environments.
• Excellent written and verbal communication skills.

Responsibilities

• Design, develop, and maintain EDI transaction processing systems for healthcare claims, eligibility verification, and remittance advice (835, 837, 270/271, 276/277 transactions)
• Build and enhance C#/.NET applications supporting medical insurance carrier operations and benefits administration
• Design and implement RESTful API integrations with third‑party healthcare systems, clearinghouses, and partner platforms
• Lead technical implementation of HIPAA‑compliant EDI solutions and ensure regulatory adherence
• Collaborate with business analysts, product owners, and healthcare operations teams to translate requirements into technical solutions
• Manage stakeholder relationships across IT, claims operations, provider networks, compliance, client services, and external integration partners
• Participate in full SDLC activities including requirements gathering, design, development, testing, deployment, and maintenance
• Leverage modern AI development tools to enhance productivity and code quality
• Provide technical leadership and mentorship to development team members
• Troubleshoot and resolve complex EDI transaction issues, API integration challenges, and system connectivity problems
• Optimize system performance and implement best practices for scalability and reliability
• Contribute to architecture decisions and technology strategy for our healthcare platform

Skills

C#

.NET Framework/.NET Core

RESTful APIs

AI‑assisted development tools

Git and CI/CD pipelines

Containerization (Docker)

Cloud-native architectures (Azure)

HIPAA knowledge

SDLC and Agile/Scrum

Tools

Azure DevOps

SQL Server

Entity Framework Core

Docker

Job description

Gallagher is seeking an experienced Senior Software Developer to join our engineering team in San Diego, focusing onHealthcare Insurance and EDI for medical operations. You will design, implement, and maintain EDI processing systems, APIs, and HIPAA-compliant solutions, collaborating with analytics and operations teams to deliver scalable, secure software.

You will leverage AI-assisted tools to boost productivity while ensuring high code quality and reliability.