Enterprise .NET, Azure & AI engineering for healthcare, FinTech and SaaS - senior team building FHIR platforms, multi-tenant SaaS products, and complex integrations since 2015.
ARSTEG Solutions (operating on Guru as Software Technology Experts Group) is a senior software engineering company, est. 2015, building and modernizing enterprise systems: healthcare platforms with FHIR/HL7 interoperability, multi-tenant SaaS and ERP products, financial and payment systems, and AI features that run in production.
Our two lead engineers are Top Rated Plus on Upwork with a combined $1.2M+ earned, 58,000+ hours, and 100% Job Success - and the same senior team works on every Guru engagement.
WHAT WE DELIVER
- ASP.NET Core (.NET 8), C#, React/Next.js, TypeScript, SQL Server, PostgreSQL
- Healthcare: FHIR R4, HL7, EHR integration, HIPAA/GDPR-aware architecture
- Integrations: QuickBooks (Desktop & Online), Xero, Stripe, Twilio, OAuth/SAML SSO
- AI: Azure OpenAI, Claude, RAG/vector search, speech-to-text - with cost control and fallbacks
- Legacy modernization: VB6 / Classic ASP / .NET Framework to .NET 8 + Azure
- Cloud & DevOps: Azure Functions, Service Bus, Key Vault, Docker, Kubernetes, CI/CD
MEASURED RESULTS
- 80% less manual data entry via automated accounting sync (SaaS ERP used by hundreds of US companies)
- 50,000+ financial records migrated at 99.8% accuracy; monthly reconciliation cut from 8 hours to 45 minutes
- 260+ API endpoints powering a national healthcare data platform
We take on projects from $5K feature builds to $100K+ platform engagements - and we tell you honestly whether we're the right fit before you commit.
Founded: 2015
Work Terms
Available 40+ hours/week with daily US and EU overlap. We start with a short scoping call and an honest fit assessment; for larger builds we can deliver a proof of concept first. Milestone-based billing via SafePay, daily written updates, and production support after launch.