05/18/2026 updated

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AI Developer | Agentic Systems, Prompt Engineering & Voice AI

Frydek Mistek, Czech Republic
Only remote
Self Taught
Frydek Mistek, Czech Republic
Only remote
Self Taught

Profile attachments

cv_jan_havlasek_english.pdf
john_jan_havlasek_portfolio.pdf

AI AgentsAlgorithm DesignSystems DesignPrompt EngineeringGenerative AIArtificial Intelligence Markup Language (AIML)
AI Architecture & Agentic Systems
Design of modular AI systems, single-file bundles, micro-kernel style runtimes and execution orchestration. Development of multi-agent simulations, team orchestrators, planning and decision agents as well as adaptive logic and internal agent runtime concepts.

Prompt Engineering
Creation of prompt generators, style presets, negative prompts and prompt optimization tools. Development of A/B evaluation frameworks and wrappers for different AI and image engines.

Voice & Conversational AI
Development of Voice OS concepts, voice chat runtimes, turn-taking, barge-in and backchannel mechanisms. Implementation of translation modules, language profiles and safe voice interaction layers.

Memory & Knowledge Systems
Context memory concepts, facts import and export, knowledge mesh, episodic memory and tool-based memory layers for AI applications.

Security & Provenance
Secure sandbox ideas, allowlist approaches, provenance tooling, auditability, integrity checks and policy and safety layers for safer AI execution.

Testing & Evaluation
AI lab workflows, model inspection, evaluation and governance modules, image A/B scoring, stability checks and diagnostic utilities.

Python & Backend Technologies
Proficiency in Python, FastAPI, Flask, Streamlit, dataclasses, JSON, threading, SQLite as well as NLP and voice libraries for model and multimodal prototypes.

Data Structures & JSON
Handling of complex data structures, JSON-based module communication and structured data exchange within AI engineering bundles.

Multimodal & Generative Tools
Development of multimodal prototypes, generative tooling and experimental UI components using Streamlit and related frameworks.

Documentation & System Design
Structured documentation of large AI engineering projects, system design for portable runtime packages and module-level architecture descriptions.

Experience

Professional experience0 - 5 years
Freelancer since2025

Languages

EnglishNative speakerCzechNative speaker

Project history

AI Developer & Creator

Qyvaria AI Studio / Lab
Design and development of a personal AI ecosystem focused on agentic orchestration, prompt tools, voice systems, evaluation, memory layers and secure runtime concepts. Outputs include a single-file engineering bundle, simulation agents, orchestration tools, prompt engine, voice runtime, secure sandbox concepts, provenance toolkit, analytics and testing modules.

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