Daniyar A.

Senior .NET Engineer | Performance & Architecture Modernization

I'm a Senior .NET Backend Engineer with 14+ years building and modernizing enterprise systems — currently working on core banking modules at a production bank, and running SyncinMind (syncinmind . com), a performance & modernization consultancy. I help companies modernize legacy applications, improve performance, and prepare systems for future growth through architecture reviews, load testing, and targeted optimization. What clients hire me for: 1) Performance & Architecture Assessments — a structured audit (profiling, load testing with k6, database analysis) that finds exactly where a system is slow and what fixing it is worth, in dollars. No vague "we'll make it faster" promises — real, measured findings. 2) Legacy modernization — migrating PHP (Symfony, Laravel) or Node.js platforms to .NET incrementally, without stopping the business running on top. Done this in production: migrated a mature Symfony/PHP SaaS platform to ASP.NET Core. 3) Backend systems that hold up under real load — C# / ASP.NET Core, PostgreSQL, event-driven architecture with Kafka/RabbitMQ, Docker + Kubernetes deployment. Delivered a high-load crowdfunding platform built from scratch on .NET, engineered for reliability under substantial concurrent traffic, with a high-performance Minimal API layer. I work end-to-end when needed (React/Next.js on the frontend), but architecture and diagnosis are where I add the most value: Domain-Driven Design, Vertical Slice Architecture, Modular Monolith — patterns that keep a codebase maintainable without over-engineering it into microservices too early. How I work: clear scope before we start, regular check-ins, and code/reports handed over documented — not a black box only I can maintain. Let's talk about what's slow, fragile, or stuck on an old stack.