
Aleksandar Djabirski
Senior .NET Architect · Azure & Cloud · Technical Lead · AI Enthusiast
Senior software engineer and technical lead with 13+ years building and evolving enterprise and hospitality platforms. I work end to end — backend, cloud, data, and front end — pairing hands-on C# / .NET engineering with software architecture, integration design, performance tuning, and pragmatic technical leadership. I like taking products from idea to production, untangling hard problems, and helping teams ship well. In my free time I build applied-AI and multi-agent systems to explore what's next.
Tech Lead
Jan 2022 — PresentLead architecture and delivery while staying hands-on across .NET, Angular, Azure, data, and integration work. Currently driving a staged .NET Framework to .NET 10 modernization of the core platform — routing change progressively with YARP rather than a disruptive big-bang rewrite, so clients, operations, and long-lived integrations are never disrupted. Also integrated Azure AD B2C authentication, hardened security, and added real-time updates with SignalR.
Senior .NET Consultant (Contract)
Nov 2025 — May 2026Helped evolve an established on-premises plugin ecosystem into a cloud-ready platform, redesigning packaging, configuration, deployment, and runtime composition while preserving reusable provider logic. Extracted shared capabilities into versioned NuGet packages with CI/CD publishing, and built resilient .NET 8 services for loyalty, gift-card, hotel-posting, and booking workflows using MongoDB, Azure Key Vault, and Polly.
Team Lead
Jun 2018 — Jan 2022Led staged modernization across Azure Functions v4, shared .NET Standard 2.0 libraries, and .NET Framework 4.8 web/API applications, laying the foundation for the move to modern .NET. Supported the shift from Database First to Code First with Entity Framework, strengthened Azure integration and CI/CD, and mentored developers in an Agile delivery environment.
Co-Founder & CTO
Jun 2017 — Jan 2022Co-founded a software-services company and set its technical direction — running technical assessments, interviews, mentoring, hiring support, and technology advisory across all clients. Helped clients make pragmatic technology, architecture, and delivery decisions while strengthening internal capability through better processes and tooling.
.NET Developer
Sep 2015 — May 2017Built C# / ASP.NET applications backed by SQL Server. Introduced Selenium test automation, accelerated third-party integration with NSwag-generated clients, optimized stored procedures and tables, and helped move the architecture from .NET Framework 4.6 toward .NET Standard 2.0.
.NET Developer
Oct 2012 — Aug 2015Developed and maintained SQL-backed .NET MVC applications, services, and APIs using ASP.NET MVC, jQuery, and XSLT.
- Built a side-by-side API parity harness comparing legacy and modern behavior — status codes, headers, payloads, auth, CORS, and middleware — to verify every cut-over before it ships
- Improved SQL Server performance by 40%+ in targeted workloads through execution-plan analysis, indexing, and query / stored-procedure rewrites, backed by Redis / FusionCache caching
- Hardened platform security with Azure AD B2C, JWT / OAuth, MFA, and Cloudflare WAF, and added real-time updates with SignalR
- Isolated a legacy native biometric DLL behind a dedicated .NET Framework 4.8 API — called over HttpClient with Polly and HMAC-signed requests — a key decoupling step in the .NET 10 migration

