Owns the design, development, testing, deployment, and maintenance of production software. Builds C#/.NET backend services, Angular web applications, and .NET MAUI mobile apps; optimizes SQL Server databases; resolves production issues; improves reliability, security, performance, and observability; writes tests and documentation; participates in code reviews; and translates ambiguous business needs into maintainable technical solutions.
Please note. Directly emailing us will result in immediate disqualification. Use the application form to apply.
About OkWhen
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.
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
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
Preferred Qualifications
- 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
Benefits
- Health Care Plan (Medical, Dental & Vision)
- Retirement Plan (401k, IRA)
- Paid Time Off (Vacation, Sick & Public Holidays)
- Family Leave (Maternity, Paternity)
- Training & Development
- Work From Home
Similar Jobs
Fintech • Software • Financial Services
Lead development of secure, scalable digital banking software across front-end and backend systems. Design Angular or React applications, build APIs, optimize SQL performance, integrate third-party platforms, improve code quality, implement testing strategies, and mentor engineers. Collaborate with cross-functional teams in an Agile environment while supporting cloud-native practices, regulatory compliance, and continuous product improvement.
Top Skills:
.Net CoreAngularAPIsAWSAzureC#CSSGCPHTMLReactSQLTypescript
Artificial Intelligence • Automotive • Retail • Software
Develop and enhance enterprise SaaS solutions for an automotive intelligence platform using C#, .NET, SQL Server, Razor, Web API, HTML, and JavaScript. Own the full software development lifecycle, write scalable code, troubleshoot performance issues, contribute to architecture, collaborate in Agile teams, and mentor peers. The role requires extensive Microsoft development experience, Azure expertise, database optimization skills, and strong problem-solving ability.
Top Skills:
.Net.Net 9.Net CoreAgileAzure DevopsC#HTMLJavaScriptAzureRazorSQLSQL ServerT-SqlVisual StudioVisual Studio CodeWeb Api
Security
Develop and maintain C#/.NET and AWS backend services processing high-volume healthcare EDI transactions. Parse and transform X12 documents, optimize SQL Server stored procedures, manipulate XML data, and troubleshoot complex transaction issues. Design enterprise applications, contribute to shared services, participate in agile development and code reviews, deploy and support production systems, and apply testing, CI/CD, DevOps, and cloud-native engineering practices.
Top Skills:
.NetAmazon EcsAmazon EksAWSAws CodebuildAws CodedeployAws CodepipelineC#Ci/CdDevOpsDockerEntity FrameworkEvent-Driven ArchitectureGitGitInfrastructure As CodeJIRAMicroservicesMicrosoft Sql ServerMstestNunitSQLVisual StudioVisual Studio CodeX12 EdiXMLXunit
What you need to know about the Seattle Tech Scene
Home to tech titans like Microsoft and Amazon, Seattle punches far above its weight in innovation. But its surrounding mountains, sprinkled with world-famous hiking trails and climbing routes, make the city a destination for outdoorsy types as well. Established as a logging town before shifting to shipbuilding and logistics, the Emerald City is now known for its contributions to aerospace, software, biotech and cloud computing. And its status as a thriving tech ecosystem is attracting out-of-town companies looking to establish new tech and engineering hubs.
Key Facts About Seattle Tech
- Number of Tech Workers: 287,000; 13% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Amazon, Microsoft, Meta, Google
- Key Industries: Artificial intelligence, cloud computing, software, biotechnology, game development
- Funding Landscape: $3.1 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Madrona, Fuse, Tola, Maveron
- Research Centers and Universities: University of Washington, Seattle University, Seattle Pacific University, Allen Institute for Brain Science, Bill & Melinda Gates Foundation, Seattle Children’s Research Institute
