Senior .NET Software Engineer

OkWhen

3d•Remote

About The Position

OkWhen builds technology that powers live, virtual, and hybrid events. Our platform supports conference management, registration, payments, mobile apps, content libraries, webinars, LMS functionality, CEU tracking, sponsor management, and operational workflows. We are hiring a Senior .NET Software Engineer to help us improve, maintain, and extend a production platform used to run complex events. The Outcome We’re Hiring For You will own meaningful parts of our application and consistently deliver reliable software without requiring constant supervision. You will improve system performance, reduce technical debt, and turn operational problems into simple, maintainable products. This is not a ticket-taking role. We need an engineer who can understand the existing system, make sound technical decisions, and follow work through from discovery to production.

Requirements

7+ years of professional software development experience
Strong commercial experience with C#, .NET, and ASP.NET Core
Strong experience with Angular and TypeScript
Advanced working knowledge of SQL Server, database design, and query optimization
Production experience with .NET MAUI or Xamarin
Experience designing and consuming REST APIs
Experience with Git, CI/CD, debugging, and automated testing
Demonstrated ability to work independently in an existing codebase
Strong written and verbal communication
Comfortable owning outcomes, not just completing assigned tasks

Nice To Haves

Experience with SaaS platforms
Experience with event management, registration, payments, LMS, or communications systems
Cloud experience with Azure or AWS
Experience with distributed systems, queues, integrations, or real-time applications
Experience modernizing legacy applications
Experience mentoring other developers

Responsibilities

Design, build, test, deploy, and maintain production software
Develop backend services and APIs using C# and ASP.NET/.NET
Build and maintain web applications using Angular
Design, optimize, and troubleshoot SQL Server databases and queries
Maintain and extend mobile applications using .NET MAUI
Investigate and resolve production issues
Improve application reliability, performance, security, and observability
Write automated tests and maintain technical documentation
Participate in code reviews and establish engineering standards
Collaborate with product, operations, and event-production teams
Break ambiguous business problems into clear technical plans
Use AI-assisted development tools responsibly to improve speed without sacrificing quality