Senior Software Developer

What You’ll Do

• Develop and maintain systems for processing healthcare transactions like claims, eligibility verification, and remittance advice (think 835, 837, 270/271, 276/277 transactions).
• Build and enhance C#/.NET applications that support medical insurance operations and benefits administration.
• Design and implement RESTful APIs to connect with third-party healthcare systems, clearinghouses, and partner platforms.
• Lead the technical implementation of HIPAA-compliant EDI solutions, ensuring everything meets regulatory standards.
• Collaborate with business analysts, product owners, and healthcare teams to turn ideas into technical solutions.
• Troubleshoot and resolve complex issues related to EDI transactions, API integrations, and system performance.
• Use modern AI tools to boost productivity and code quality.
• Mentor and guide junior developers, sharing your expertise and best practices.
• Contribute to architecture decisions and help shape the technology strategy for our healthcare platform.

What We’re Looking For

• Experience: 7+ years of software development with C# and .NET Framework/.NET Core.
• Healthcare Expertise: Hands-on experience with healthcare EDI transactions (X12 standards like 837, 835, 270/271, etc.) and a solid understanding of HIPAA regulations.
• Tech Skills: Proficiency in RESTful APIs, Microsoft tech stack (ASP.NET Core, SQL Server, Azure), and modern development tools (Git, CI/CD pipelines, containerization).
• AI Enthusiast: Familiarity with AI-assisted development tools like GitHub Copilot, Claude Code, or similar platforms.
• Problem Solver: Strong analytical skills and attention to detail in complex healthcare data environments.
• Team Player: Excellent communication skills and the ability to work with both technical and non-technical stakeholders.

• Experience with cloud platforms (Azure preferred) and microservices architecture.
• Knowledge of healthcare interoperability standards like HL7 or FHIR.
• Familiarity with frontend frameworks (React, Angular, or Vue.js).
• Background in claims adjudication systems or medical billing operations.
• Certifications in Microsoft technologies or healthcare IT standards.

We offer a competitive and comprehensive compensation package. The base salary range represents the anticipated low end and high end of the range for this position. The actual compensation will be influenced by a wide range of factors including, but not limited to previous experience, education, pay market/geography, complexity or scope, specialized skill set, lines of business/practice area, supply/demand, and scheduled hours. On top of a competitive salary, great teams and exciting career opportunities, we also offer a wide range of benefits.

Below are the minimum core benefits you’ll get, depending on your job level these benefits may improve:

• Medical/dental/vision plans, which start from day one!
• Life and accident insurance
• 401(K) and Roth options
• Tax-advantaged accounts (HSA, FSA)
• Educational expense reimbursement
• Paid parental leave

• Digital mental health services (Talkspace)
• Flexible work hours (availability varies by office and job function)
• Training programs
• Gallagher Thrive program – elevating your health through challenges, workshops and digital fitness programs for your overall wellbeing
• Charitable matching gift program
• And more...

Click Here to review our U.S. Eligibility Requirements

Inclusion and diversity (I&D) is a core part of our business, and it’s embedded into the fabric of our organization. For more than 95 years, Gallagher has led with a commitment to sustainability and to support the communities where we live and work.

Gallagher embraces our employees’ diverse identities, experiences and talents, allowing us to better serve our clients and communities. We see inclusion as a conscious commitment and diversity as a vital strength. By embracing diversity in all its forms, we live out The Gallagher Way to its fullest.

Gallagher believes that all persons are entitled to equal employment opportunity and prohibits any form of discrimination by its managers, employees, vendors or customers based on race, color, religion, creed, gender (including pregnancy status), sexual orientation, gender identity (which includes transgender and other gender non-conforming individuals), gender expression, hair expression, marital status, parental status, age, national origin, ancestry, disability, medical condition, genetic information, veteran or military status, citizenship status, or any other characteristic protected (herein referred to as “protected characteristics”) by applicable federal, state, or local laws.

Equal employment opportunity will be extended in all aspects of the employer-employee relationship, including, but not limited to, recruitment, hiring, training, promotion, transfer, demotion, compensation, benefits, layoff, and termination. In addition, Gallagher will make reasonable accommodations to known physical or mental limitations of an otherwise qualified person with a disability, unless the accommodation would impose an undue hardship on the operation of our business.