Senior Software Engineer

Senior Software Engineer

Are you ready to take on your next challenge? Are you ready to take the reins of a capable technical team? Are you ready to contribute to the development of the next generation of products?

Advantage Design Group is looking for an experienced C# Senior software engineer that will be working with and leading a 5+ person team.

As a Senior Software Engineer, you will design, build, and maintain scalable CMS-driven platforms that power ADG's orientation and recruiting experiences. You will lead the development of enterprise-ready solutions, from end-to-end solutions, while mentoring developers and helping shape best practices. You will be provided with strong mentorship and have a chance to grow and develop your own leadership style.

We create interactive, video-driven recruiting and orientation platforms that help people start strong. With more than 400 institutions and organizations served, we are the market leader in powering, welcoming, accessible, and data-driven onboarding experiences. We are a 50-person company located in Jacksonville FL that provides online orientation platform to clients across the US and Canada.

Why You'll Love It Here

• Impact on a scale: Your work improves first-day experiences for students and employees nationwide.
• Tech stack: C#, ASP.NET Core, Umbraco 13 (LTS on .NET 8), Azure, SQL Server, DevOps, CI/CD pipelines.
• Our platform: Cloud hosted platform with a web front end, back office, reporting, user management, single sign-on, and systems integrations.
• Tight-knit development team within a mid-sized company: You'll enjoy the best of both worlds, collaborating closely with developers while being part of a company where your contributions are visible and valued.

Key Responsibilities

• Architect, develop, and maintain Umbraco-based web applications in .NET (C#).
• Build content models, custom property editors, and support upgrade paths (v13 and higher).
• Integrate SSO (OAuth2, SAML, OpenID Connect), REST APIs, and enterprise systems with documentation in Open API (Swagger).
• Configure and manage Azure deployments (App Service, Azure SQL, Storage, Key Vault, App Insights) with CI/CD pipelines.
• Troubleshoot, debug, and optimize performance across front-end and back-end systems.
• Champion development standards, peer reviews, automated testing, and observability.
• Collaborate with project managers, designers, and media teams to deliver responsive and accessible digital experiences.
• Work with customers to achieve their vision for recruiting and orientation.
• Lead the vision for product development and improvements.

Required Skills

• 5+ years of professional experience in web development with a strong focus on enterprise applications.
• Expertise in .NET (C#), ASP.NET Core/MVC, Razor, SQL Server, and Git.
• Hands-on experience with Umbraco (v13 - 16 preferred).
• Experience with SOAP, REST APIs, AJAX, Open API (Swagger), and API testing tools such as Postman.
• Working knowledge of Azure services and application hosting in IIS/Kestrel.
• Familiarity with authentication protocols (OAuth2, SAML) and SSO patterns.
• Understanding accessibility standards (WCAG) and security best practices.
• Familiarity with networking concepts including DNS, SSL, Load Balancing, Firewalls, Security Groups, and DKIM.
• Experience with microservices architecture

Experience/Education

• B.S or equivalent experience
• 5+ years relevant work experience
• Proficient in design patterns, SOLID principles, and best practices.
• Knowledge of DevOps practices and continuous integration/continuous deployment (CI/CD).

Nice to Have

• Experience with Umbraco Forms, Examine search, headless Content Delivery API
• Familiarity with Serverless Application Architectures, including Docker or Kubernetes.
• Experience integrating with Salesforce, Workday, HRIS or Ellucian systems.
• Azure or AWS certification
• Leading development projects and mentoring junior team members.
• Designing, architecting, and implementing complex software solutions.
• Optimizing application performance and scalability.
• Lead collaborating with stakeholders, including client meetings to gather requirements and provide technical insights.

Growth Opportunities

• Actively involved in technological decision-making processes.
• Lead architectural design and implementation.
• Pursue further certifications (e.g., Microsoft Certified Solutions Developer - MCSD).
• IT Certifications (Azure dev associate, .NET fundamentals, DevOps Expert)

Candidate Profile

• Technical leader who can take ownership of solutions and guide best practices.
• Collaborative teammate who thrives in cross-functional environments.
• Problem solver who balances technical depth with client needs.
• Continuous learner who explores emerging tools and technologies.

Compensation and Benefits

• Competitive base salary with annual performance-based raises.
• 401(k) with company match.
• Profit-sharing program.
• Group Health, Dental, and Vision Insurance.
• Paid vacation and holidays.
• Hybrid work schedule after onboarding.
• Gym membership and stocked breakroom (coffee, snacks, tea).
• Ongoing training, mentorship, and career development.
• A beautiful office in coastal Jacksonville, FL near beaches and with no state income tax.

Ready to Apply? If you thrive on solving complex technical challenges and want your work to make a real impact, we would love to meet you.