Senior Software Engineer - .NET CORE, React, PostgreSQL

Job Title: Senior Full Stack Software Engineer (.NET / React)

Location: Remote (U.S.)

Salary: $145,000 - $170,000 Base

Job Type: Full-Time | Exempt

Benefits: Medical, Dental, Vision, 401(k), Unlimited PTO

Work Authorization: Must be authorized to work in the United States. This position is not eligible for sponsorship.

Confidential Opportunity

Our client is an established software organization seeking a Senior Full Stack Software Engineer to help modernize and evolve a highly scalable enterprise SaaS platform supporting mission-critical business operations.

This role offers an opportunity to contribute to both new feature development and modernization initiatives while helping shape the long-term technical direction of the platform. You'll work alongside experienced engineers, product leaders, and architects to deliver reliable, scalable software used by enterprise customers nationwide.

Responsibilities

• Design, develop, and enhance enterprise web applications using modern Microsoft technologies.
• Build scalable backend services and APIs while contributing to responsive front-end experiences.
• Collaborate closely with Product Management, QA, and Engineering to deliver high-quality software.
• Participate in architecture discussions, code reviews, and technical planning.
• Improve application performance, reliability, security, and maintainability.
• Mentor fellow engineers and promote software engineering best practices.

Qualifications

• 7+ years of professional software engineering experience.
• Strong experience with C#/.NET and modern application development.
• Experience building front-end applications using React.
• Strong SQL and relational database experience.
• Experience building scalable cloud-based applications.
• Excellent communication and collaboration skills.
• Passion for writing clean, maintainable, production-quality code.

Preferred

Experience with distributed systems or modern SaaS platforms.

• Background in regulated industries such as healthcare, insurance, financial services, or enterprise software.
• Experience using AI-assisted development tools while maintaining strong engineering discipline.

Why Consider This Opportunity?

• Fully remote engineering team.
• Modern technology stack with significant platform modernization underway.
• Opportunity to influence architecture and engineering practices.
• Collaborative culture with experienced technical leadership.
• Competitive compensation and excellent benefits.
• Long-term career growth within an expanding software organization.

If you're looking for an opportunity to solve complex technical challenges while helping shape the future of a growing enterprise platform, we'd welcome the opportunity to connect.

Addison Group is an Equal Opportunity Employer. Addison Group provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, gender, sexual orientation, national origin, age, disability, genetic information, marital status, amnesty, or status as a covered veteran in accordance with applicable federal, state and local laws. Addison Group complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. Reasonable accommodation is available for qualified individuals with disabilities, upon request.

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