Senior Architect / C# / Greenfield

Boulder , ColoradoHybridFull Time$200k - $220kA growing software startup is seeking a Senior Software Architect to join its engineering team in Boulder, Colorado, working in a hybrid environment with three onsite days per week. This full-time opportunity offers the chance to help build SaaS products using C#, .NET, SQL Server, and modern development practices. Working alongside experienced founders and a small, highly collaborative team, you'll play a key role in designing and developing a product intended to unify business operations into a single intelligent platform.The team is looking for someone who thrives when given a problem to solve rather than a step-by-step set of instructions. You'll be trusted to take ownership of features, explore solutions independently, and contribute to key technical decisions in an environment that values initiative and accountability. From application architecture and database design to feature development and technical planning, this role offers the opportunity to work across multiple areas of the platform while helping shape the future of a growing company.Required Skills & Experience7+ years of professional software development experienceStrong expertise with C# and the .NET ecosystemExperience designing and building applications from the ground upStrong object-oriented programming fundamentalsDeep understanding of SOLID principles and modern design patternsExperience with inheritance, composition, interfaces, and abstraction layersStrong SQL Server development experienceExperience with database design, entity modeling, indexes, and constraintsExperience translating business requirements into technical solutionsStrong problem-solving and solution-design skillsAbility to work independently with minimal directionExcellent written and verbal communication skillsDesired Skills & ExperienceWinForms or WPF development experienceStartup experienceGreenfield or build-from-scratch development experienceExperience with Repository, Factory, Strategy, Observer, and Dependency Injection patternsExperience building workflow, project management, or enterprise software platformsExperience evaluating architectural tradeoffs and technology choicesExperience working closely with executive leadership and product stakeholdersExperience mentoring or guiding other developersWhat You Will Be DoingTech Breakdown50% C#/.NET Development20% Software Architecture & Solution Design20% SQL Server & Data Modeling10% Wisej.NET UI DevelopmentDaily Responsibilities75% Hands-On Development15% Architecture & Technical Design10% Team CollaborationApplicants must be currently authorized to work in the US on a full-time basis now and in the future.