Hal Wayland online. Martin Mikušát in real life. CV →
Full-stack developer with 3+ years of experience designing, building, and owning production-grade applications. Strong focus on performance, UX, and maintainability.
Currently working at Delta Electronics (Slovakia), s.r.o. in Dubnica nad Váhom, Slovakia, where I initiated and developed an EV charger diagnostics platform used daily by technicians across EMEA. The application processes bulk logs, delivers sub-200ms search across tens of thousands of records, and includes automated reporting and LLM-powered summarization.
Proven ability to work independently, ship complex systems end-to-end, and significantly improve operational efficiency. Experienced with Electron, Svelte, Supabase, large-scale log processing, and LLM-assisted development in production.
Selected projects showcasing production applications and developer tools. From enterprise diagnostics platforms to interactive 3D assembly manuals.
Production-grade Electron and Svelte desktop application for EV charger diagnostics, used daily by technicians across EMEA. Initiated and developed as a solo developer after identifying major inefficiencies in existing support workflows.
Performance & Scale: Supports several thousand EV chargers across Europe. Delivers sub-200ms search across chargers, cases, work orders, and spare parts with fuzzy matching and exact serial prioritization. Approximately 150ms log parsing and statistics generation with instant filtering. Instant scrolling and interaction across thousands of charging sessions.
Core Features: Bulk log download and parsing pipelines that transform raw charger logs into structured charging sessions and statistics. Automated reports relied upon by QA teams as critical operational input. One-click preparation and packaging of diagnostic data for support handoffs with freshness reuse to avoid redundant downloads.
Architecture: Offline-first, responsive UI using local caching with Dexie and real-time synchronization via Supabase. Built bulk and queued operations for repetitive support tasks such as log downloads, connectivity checks, and data collection. Fleet-wide analytics and streaming report exports designed to scale to thousands of chargers.
AI Integration: LLM-powered summarization for cases and emails to reduce manual workload and improve response quality. Implemented production LLM-assisted development workflows.
UX & Impact: Designed workflows that reduced task execution time by approximately 10x compared to manual processes. Focused heavily on UX details for power users including paste-to-search, click-to-copy, and instant feedback loops. Full ownership of architecture, data modeling, performance optimization, and feature delivery.
Technologies: Electron, Svelte, Supabase, PostgreSQL, Dexie, TypeScript, LLM Integration
Interactive 3D animation manual for assembling the Voron Clockwork 2 extruder. Step-by-step assembly instructions with animated 3D models showing all parts and hardware components.
A calculator application that helps determine whether it's worth spending time optimizing a routine task. Based on the concept from xkcd comic #1205.
Compose PrusaSlicer profiles by stacking reusable setting layers. Pick a base profile, add and reorder layers, preview conflicts, and export a standard .ini file.
Technologies and tools used in production applications, from desktop Electron apps to interactive web experiences.