Jakub Nowacki, CTO and Co-founder of Nusmark, builds an agentic AI assistant that transforms personal productivity by combining multiple specialised components into a seamless 24/7 digital secretary accessible in whatsapp. Starting his coding journey at nine years old creating video games and building AI opponents when friends chose basketball over programming, Jakub mentored over 100 students at university, won the AI Summit London twice (first person to achieve this), and left corporate aerospace after discovering the bureaucratic inefficiencies of requiring forms to send emails. He explains agents as infrastructure around LLM "brains" that provide tools and execute actions in loops, using Gemini for its massive context window and Google TPU speed advantages while building modular systems that can swap models instantly based on performance benchmarks. Jakub reveals Nusmark's sophisticated architecture featuring custom thinking layers, parallel/sequential processing for reduced latency, and RAG-based tool selection to handle future MCP server ecosystems, while implementing both short-term memory (stored in context) and long-term memory (extracted patterns from months of conversations). Their breakthrough phone calling feature uses speech-to-text, LLM processing, and text-to-speech components to book NHS appointments and restaurant reservations, with users questioning whether real humans are involved, while building toward agent-to-agent token-based communication that bypasses human language inefficiencies. Jakub positions Nusmark as the "super connector" that integrates across competing platforms (Meta, Google, Apple) where individual companies cannot due to competitive barriers, offering proactive capabilities like following up on delayed callbacks and scheduling meetings between users' agents that negotiate optimal times based on preferences like avoiding dinner conflicts and maintaining buffer zones around internal meetings, ultimately creating a mobile-first calendar experience designed specifically for touch interfaces rather than desktop-to-mobile ports.