Full Stack Software Engineer

The Role

We’re looking for a Full Stack Software Engineer who can own a feature from database to UI and help raise the bar for the rest of the team. You’ll work across the entire stack in a modern .NET / Angular environment, drive technical design decisions, participate fully in Agile ceremonies, and collaborate closely with product, UX, and client success. This isn't a role where you pick up tickets and disappear. We expect you to understand context, ask good questions, and care about what ships.

What You'll Work On

• Design and develop new features across the full stack from SQL schema through business logic to Angular UI
• Troubleshoot, diagnose, and fix issues across the existing codebase, from UI behavior down to database performance
• Lead technical design discussions and own architecture decisions for the features you build
• Mentor other engineers through pairing and design feedback
• Take full ownership of code you ship: write thorough unit tests, review your own work critically, and anticipate upstream/downstream effects before opening a PR
• Participate actively in peer code reviews with a focus on correctness and long-term maintainability
• Contribute to sprint planning, retrospectives, and scope assessments. Your input on timelines matters.
• Support teammates and contribute to a culture where the bar stays high

The Stack

• Business / API Layer: C#, ASP.NET, REST, Repository Pattern
• UI: Angular
• Data Layer: MSSQL, Entity Framework
• Testing: MSTEST, Jest

 What We’re Looking For

Required

• Bachelor’s in Computer Science or related field + 8+ years of experience, OR 10+ years of equivalent full-time professional experience
• Experience building and shipping commercial B2B software, ideally at an independent software vendor (ISV)
• Expert-level object-oriented design and architecture skills in .NET / C#
• Deep experience designing and building REST APIs with ASP.NET
• Extensive JavaScript development experience with a modern frontend framework, Angular strongly preferred
• Strong SQL proficiency and solid experience with relational databases
• Strong testing discipline and a habit of writing thorough unit tests
• Willingness to make AI coding tools like Claude Code or GitHub Copilot part of your daily workflow

Nice to Have

• Cloud platform experience (AWS or Azure)
• Automated testing experience (UI, API, integration)
• Construction or industrial domain knowledge
• SQL Server (MSSQL) and Entity Framework experience, including advanced skills like execution plan analysis, query tuning, and T-SQL
• 3D modeling or graphics experience, such as Autodesk tools and APIs or three.js
• Experience mentoring engineers and leading feature design from concept to production

Benefits

• Remote work
• Unlimited PTO
• Results Only Work Environment (ROWE): flexible schedules, no micromanagement
• Medical, Dental & Vision Insurance
• Life, AD&D & Long-Term Disability coverage
• 401(k) Plan & Matching
• Professional development support

Why O3

Construction is a multi-trillion dollar industry that still runs on spreadsheets and tribal knowledge. We're changing that. If you want to build software that has a real, visible impact on how the world gets built, and do it on a team where your name is on the work, this is the right place.

Additional Information