Senior Architect​/C# ​/Greenfield

Position: Senior Architect / C# / Greenfield
Boulder , Colorado Hybrid Full  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 experience

Strong expertise with C# and the .NET ecosystem

Experience designing and building applications from the ground up Strong object-oriented programming fundamentals

Deep understanding of SOLID principles and modern design patterns

Experience with inheritance, composition, interfaces, and abstraction layers

Strong SQL Server development experience

Experience with database design, entity modeling, indexes, and constraints

Experience translating business requirements into technical solutions

Strong problem-solving and solution-design skills

Ability to work independently with minimal direction

Excellent written and verbal communication skills

Desired Skills & Experience Win Forms  or WPF development experience

Startup experience

Greenfield or build-from-scratch development experience

Experience with Repository, Factory, Strategy, Observer, and Dependency Injection patterns

Experience building workflow, project management, or enterprise software platforms

Experience evaluating architectural tradeoffs and technology choices

Experience working closely with executive leadership and product stakeholders

Experience mentoring or guiding other developers

What You Will Be Doing Tech Breakdown
50% C#/.NET Development
20% Software Architecture & Solution Design
20% SQL Server & Data Modeling
10%  UI Development Daily Responsibilities
75% Hands-On Development
15% Architecture & Technical Design
10% Team Collaboration Applicants must be currently authorized to work in the US on a full-time basis now and in the future.