Mid-Level Full-Stack Software Engineer (US-based Candidates Only)

About the role

Tassel is seeking a mid-level full-stack software engineer to join us for greenfield development and legacy modernization projects. The role focuses on frontend development with React, Next.js, and TypeScript, while also contributing to backend services in .NET 8/10 and SQL Server.

Key Responsibilities

• Develop new frontend features and UI components using React, Next.js, and TypeScript
• Develop and maintain new and existing features using .NET/C#, ASP, and Microsoft SQL Server
• Contribute to architectural and design decisions related to new and existing features in a full-stack context
• Ensure performance, accessibility, and reliability across the application
• Integrate with 3rd party APIs and service providers across the stack
• Participate in code reviews and provide constructive feedback
• Assist with application deployments and troubleshooting in Azure when needed

Qualifications

• 4+ years of professional experience in full-stack software development
• Production experience with React, Next.js, and TypeScript
• Production experience with .NET, ASP, and C#
• Working knowledge of relational databases and SQL
• Experience writing and maintaining automated, unit, and integration tests
• Understanding of full-stack architecture best practices
• Experience integrating frontend applications with REST APIs
• Exposure to CI/CD tooling (Azure DevOps, GitHub Actions, or similar)
• Familiarity working in Azure environments
• Strong written and verbal communication skills and the ability to work effectively in a remote setting
• Ability to work in the US without sponsorship

Additional Qualifications

• Experience with Docker in development workflows
• Background working in modernization or legacy migration projects
• Exposure to Angular.js or similar legacy frameworks
• Experience with Azure Service Bus or similar message queue technologies