Custom .NET / C# Development
Robust, maintainable applications built on .NET and C# — from APIs and services to complete line-of-business systems.
Learn more →Software Engineering Studio
Custom .NET software, architected to last.
SJ GRP LLC designs and builds dependable software for companies that take engineering seriously — combining deep .NET expertise, rigorous architecture, and modern AI integration.
What we do
Services
Software Architecture
Domain-driven design and clean, hexagonal architectures that keep systems adaptable as they grow.
Learn more →AI / LLM Integration
Practical integration of large language models — retrieval, orchestration, and automation — into your existing products.
Learn more →Why SJ Group
Engineering you can build on
Engineering rigor
Tested, reviewed, and documented code — built to be maintained, not just shipped.
Architecture-first
Clear domain boundaries and clean architecture so your system stays flexible as it scales.
AI-ready
Pragmatic AI and LLM integration that adds real capability without disrupting what already works.
Have a project in mind?
Tell us what you're building. We'll help you scope it and get it right.