João F.

I'm a Technical Architect with 10+ years in Microsoft technologies, designing and owning high-performance web platforms end to end. I modernize legacy .NET systems, fix the database problems that slow them down, and bring AI into existing products without breaking what already makes money. WHAT I DO BEST • .NET architecture and modernization: legacy ASP.NET to modern .NET, migrated while the platform stays live. At Allivet I led a migration of a high-traffic eCommerce platform that improved performance by 30%. • SQL Server performance: query tuning, execution plans, indexes, stored procedures and triggers. One optimization cut query response times by 40%. • AI integration into production systems: OpenAI and Anthropic Claude APIs, RAG and document processing, OCR (Tesseract), NLP/NER (spaCy), audio pipelines (FFmpeg) and Vision-Language Models. I set the prompt, cost and failure-handling patterns so AI features are reliable and affordable. • Technical leadership: API contracts, code review standards, technology selection, and turning business needs into scoped, deliverable projects. • CMS and eCommerce: Umbraco, Episerver, multi-site storefronts. RECENT WORK As Technical Architect for a US eCommerce company, I own the platform and the internal systems around it, and lead the in-house team delivering projects for Operations, Marketing, Design and Finance. I architected their internal AI tooling suite for meeting intelligence and document processing: transcription, entity extraction and automatic memo generation. Before that I worked on banking compliance data integration (BNP Paribas Fortis, MiFID), financial APIs (Ekofolio) and agency projects for clients across Europe, the UK and Australia. HOW I WORK • Based in Lisbon (Western European time), available weekday mornings, and comfortable with async collaboration. • Best fit: architecture reviews, performance audits, AI integration projects, and ongoing part-time technical leadership. • I give clear estimates, document decisions, and leave systems easier to maintain than I found them. If you have a .NET platform that needs to be faster, more modern, or smarter with AI, send me a message and tell me what you're working on.