Senior Fullstack Developer (.NET + React)

Hi!

Velvetech LLC is a US-based software development company with 20+ years on the market, Microsoft Gold Partner status, and a strong engineering culture. We build reliable, long-term technological partnerships with clients across the United States, and we are now expanding our engineering team.

We are looking for a Senior Full-Stack Developer with deep experience in .NET and React who enjoys solving complex technical tasks, writing clean and maintainable code, and contributing to high-impact projects used by thousands of users.

If you like autonomy, modern processes, and a stable environment — you’ll enjoy working with us.

What You Will Do:

• Design and develop modern web applications using .NET Core and React

• Build clean, efficient, scalable code on both the backend and frontend

• Implement user interfaces, ensure responsiveness, and improve performance

• Work closely with product owners, QA, and other engineers in a collaborative environment

• Own features end-to-end—from concept and architecture to deployment

• Write documentation, maintain project reports, and participate in code reviews

• Stay up-to-date with modern engineering practices, frameworks, and AI-assisted development tools

What We Expect:

5+ years of hands-on experience with:

• .NET Core

• C#, REST APIs

• SQL databases (MS SQL, PostgreSQL, MySQL)

• ORM frameworks (EF, EF Core, NHibernate)

• React, JavaScript/TypeScript, modern UI patterns

• SOLID principles and clean architecture

• English: Intermediate+ (daily communication with international teams)

AI-Driven Development Requirements:

We actively use AI to speed up development and improve productivity, so the following is required:

• Proficiency with AI tools: GitHub Copilot, ChatGPT, Cursor IDE, Tabnine, or similar

• Ability to write strong prompts and understand AI limitations

• Using AI for debugging, code quality improvements, refactoring, documentation

• Willingness to follow an AI-First SDLC workflow across the team

• Experience with Docker, Kubernetes

• Linux development experience

• NoSQL databases (MongoDB, Cassandra)

• Knowledge of Python or F#

• Strong problem-solving and system design skills

• Relevant certifications (Azure, AWS)
  
  Benefits:

• Velvetech is in the TOP 5 development companies in Illinois, USA
• You have FLEXIBLE working conditions and a COOPERATIVE environment
• Competitive salary
• Many CHALLENGING and exciting projects with new opportunities and learning
• GROWTH opportunities, skills and competencies improvement, and professional certification
• In-company TRAINING (English, Software / DevOps / Project management / Design / Business)
  
  Our team:
  We are a friendly team of 170+ professionals where everyone is able to achieve high results and grows professionally not only due to their own knowledge and skills but also with the support of colleagues. Values that we highly appreciate are high performance, responsibility, respect, and loyalty. In order to have a highly motivated team, Velvetech invests in their people, additional education, certification, and others.
  
  You have a chance to become a part of a friendly and professional team that creates robust software solutions to deliver maximum value to our international clients. Start your journey today!