Zoltan V.

I am a founder, systems architect, and technology leader with over two decades of experience designing and delivering complex software platforms across government, legal, AI, procurement, and regulated industries. My background spans startup founding, engineering leadership, platform architecture, large-scale data systems, and advanced AI applications. I have helped build and scale systems used by public-sector organisations, law firms, technology startups, and commercial enterprises where performance, reliability, compliance, and auditability are critical requirements. I am typically brought into projects when technical complexity has become business-critical, whether that involves AI architecture, semantic search, PostgreSQL performance optimisation, compliance systems, large-scale data engineering, or platform redesign. Areas of Specialisation AI & Semantic Search Retrieval-Augmented Generation (RAG) Vector search and embeddings HNSW and IVFFLAT optimisation LLM grounding and hallucination reduction Legal and compliance AI systems Knowledge graphs and semantic retrieval PostgreSQL & High-Performance Data Systems Query optimisation Indexing and execution plan analysis High-volume and low-latency search workloads Data modelling and architecture Database scalability and performance tuning Legal Technology & Compliance Platforms Regulatory and statutory knowledge systems Explainable AI solutions Audit-ready architectures Legal document intelligence Semantic legal analysis Compliance workflow automation Government & Procurement Technology Public procurement platforms Contract intelligence systems Supplier intelligence and analytics Framework and tender data platforms Large-scale public-sector datasets Platform Architecture & Engineering Leadership System architecture reviews Technical due diligence CTO advisory Engineering leadership Scalability and reliability consulting Cloud and infrastructure strategy Selected Experience Co-founded multiple technology businesses, including a Y Combinator-backed venture. Co-built BidStats, a procurement intelligence platform that was successfully acquired. Architected and delivered large-scale public-sector procurement and contract intelligence systems. Led development of AI and legal technology solutions used within regulated environments. Designed semantic search, retrieval, and knowledge systems handling millions of records. Built audit-ready data platforms where transparency, traceability, and explainability were essential. How I Can Help Whether you need a fractional CTO, an AI systems architect, a PostgreSQL performance specialist, or a technical lead for a complex data platform, I bring a combination of strategic thinking and hands-on engineering experience. I work best with organisations facing difficult technical challenges that require more than just implementation. My focus is on solving the underlying architectural, performance, scalability, and compliance problems that determine whether a system succeeds long-term. If you're building AI products, data-intensive platforms, legal technology, procurement systems, or mission-critical software, I'd be happy to discuss how I can help.