# Roman Kozak **York, United Kingdom** | +44 7393 876 815 | uk.qa.kozak@gmail.com | [LinkedIn](https://www.linkedin.com/in/roman-testbuster/) **Interactive Dossier & Live Demos:** [cv.testbuster.ai](https://cv.testbuster.ai) | [testbuster.ai](https://testbuster.ai) | [bank.testbuster.ai](https://bank.testbuster.ai) --- ## Executive Summary **AI Agentic QA Architect & Senior QA Lead** with **11+ years** directing Quality Assurance for Corporate Online Banking at Ukraine's largest bank (PrivatBank, 24M+ customers), leading 15 engineers across 5 Scrum streams. Rare hybrid of **C-level financial governance** (former Deputy CFO & Financial Controller) and **AI Agentic Systems Engineering** — directing multi-agent software factories. Concurrently with banking duties, architected, trained, and launched a multi-product distributed cloud ecosystem: **TestBuster.AI** (live SaaS, Stripe billing, 150+ endpoints), **Atlassian Forge Suite**, **Google Edge** (VS Code/IntelliJ, 2,350+ tests, MCP), and **MockBank** live sandbox. --- ## Key Achievements & Impact - 🚀 **Shipped Distributed Cloud SaaS Solo:** Architected and deployed [TestBuster.AI](https://testbuster.ai) to Hetzner production: 6 microservices, 150+ REST endpoints, Stripe billing (£29/£99), Keycloak OIDC, multi-domain DNS, and enterprise SMTP — engineered 100% via multi-agent orchestration. - 🛠️ **Built Enterprise IDE Tooling (Google Edge):** Engineered developer ecosystem (VS Code v3.0 & IntelliJ plugins) backed by **2,350+ automated tests (100% pass)**: native Model Context Protocol (MCP) runtime, autonomous Swarm Self-Healing loop, Babel AST mutation testing, and flakiness telemetry. - ⚡ **Atlassian Forge Cloud Suite:** Architected Jira/Confluence Cloud app: 1-click test synthesis for 12 frameworks, 35s Scope-Clamped ticket verifier, Bug Capsule Replayer (`?tb_replay=`), WCAG 2.2 AA auditor, and Confluence release gate macro. - 🧠 **Trained Domain LLM (Qwen 2.5 SDET):** Curated 33,965 enterprise QA dataset and fine-tuned Qwen 2.5-Coder SDET for algorithmic test design, paired with a multi-LLM cascade (Cerebras ~10ms, DeepInfra 72B, DeepSeek, Fireworks, local Ollama tunnels). - ⚡ **12-Framework Cognitive Crawler Engine:** Built an autonomous crawler (MCTS + State Graph) synthesizing test suites across 12 UI frameworks (Playwright, Cypress, Selenium, PyTest, C#, Java, Ruby, PHP) and 8 API frameworks, plus automated Axe-core A11y suites. - 👥 **Corporate Banking Leadership:** Led 15 QA engineers in corporate online banking; transitioned org to automation-first testing (REST Assured, Selenide, CI/CD), compressing regression cycles from days to hours with zero unhandled production incidents. --- ## Technical Skills Matrix - **AI Agentic Systems:** Multi-Agent Swarm Orchestration (16 roles), Model Context Protocol (MCP Server & Stdio Runtime), Multi-LLM Cascades & Failover (Cerebras, DeepInfra, DeepSeek), Local Ollama SSH Tunnels, Reasoning Sanitization, FinOps Cost Governance ($0 waste). - **Model Training:** Qwen 2.5-Coder SDET Fine-Tuning, LoRA/QLoRA, Synthetic Dataset Engineering (33.9k QA pairs), Model Serving. - **Quality Engineering & SDET:** Universal Test Synthesis (12 UI & 8 API frameworks), Algorithmic Test Design (Pairwise IPOG, EP/BVA 7-point, OWASP Fuzzing), AI Flakiness Predictor, AST Mutation Testing, Axe-core (WCAG 2.2 AA), Headed E2E Auditing (`ProductionBugAuditor`). - **Distributed Architecture:** Microservices Mesh (Node.js/Express BFF, Python FastAPI, BullMQ/Redis queues, RabbitMQ event streaming), WebSockets, Living Traceability (Confluence Markdown import, Cytoscape/Dagre 4-layer auto-layout). - **Cloud, DevOps & SecOps:** Hetzner Cloud VPS, Docker Compose Mesh, Caddy Auto-TLS, Anti-DDoS, Fail2ban, Keycloak IAM (OAuth2/OIDC, RBAC), Stripe Payments & Webhooks, Multi-Domain DNS, Atlassian Jira & Confluence Cloud APIs, Chrome/Edge Extensions (Manifest V3). - **Banking Domain:** Corporate Online Banking, Payment Processing, SWIFT/SEPA simulators, Fraud Pattern Analysis, FinTech Compliance. --- ## Flagship Systems Portfolio *(Live Production & Open Source)* ### 1. TestBuster.AI — Autonomous Multi-Agent Test Automation SaaS *(Live: https://testbuster.ai)* - **Core:** Distributed microservices mesh (BFF Gateway, AI Test Core, Cognitive Crawler, Auth Vault, MockBuster) deployed on Hetzner Cloud via 10+ Docker containers with multi-domain DNS, Anti-DDoS, and Caddy TLS. - **Capabilities:** 15-stage MCTS cognitive crawler; autonomous code generation for 12 UI & 8 API frameworks; 6 formal test design engines; Stage 14 Axe-core accessibility; Living Traceability with Confluence 1-click import; Stripe billing (£29/£99); Keycloak OIDC. ### 2. Atlassian Forge Suite — Jira Cloud & Confluence Cloud App *(Atlassian Marketplace ready)* - **Capabilities:** 1-Click API Test Generator (12 frameworks), 35s Scope-Clamped ticket verifier, deterministic Bug Capsule Replayer (`?tb_replay=`), WCAG 2.2 AA Auditor (1-click Jira defect logging), and Confluence DoD Release Gate Macro (`🟢 READY` / `🔴 BLOCKED`). ### 3. Google Edge — Hybrid Agentic Orchestrator & IDE Suite *(VS Code v3.0 & IntelliJ IDEA)* - **Scale:** **2,350+ automated tests (100% pass rate)**. Native Model Context Protocol (MCP) server & client runtime with multi-IDE auto-discovery (Cursor, Claude Desktop, VS Code); closed-loop Swarm Self-Healing; flakiness predictor; Babel AST mutation engine. ### 4. Mock Bank — Production-Grade Banking Target *(Live: https://bank.testbuster.ai)* - **Scale:** 17+ core REST modules (Auth, Accounts, Idempotent Transactions, OTP Payments, Cards, Loans, Consolidated Balance Financial Center); RabbitMQ message broker for asynchronous events; dual frontend (Vanilla JS SPA + Angular 17). --- ## Professional Experience ### PRIVATBANK — Ukraine's Largest Retail Bank *(24M+ customers)* **Senior QA Lead** | Nov 2014 – Present | Remote (UK-based) - **Leadership & Strategy:** Manage and mentor distributed QA team of 15 engineers (12 Manual + 3 AQA) across 5 parallel Scrum teams for Corporate Online Banking. Author master test strategies for high-stakes payment and security rollouts. - **Automation & AI Transformation:** Shifted organization to automation-first engineering (REST Assured, Selenide, CI/CD); mentored engineers on modern AI-assisted test design, synthetic data pipelines, and API validation. - **Risk Governance:** Partnered with InfoSec and Enterprise Architecture to enforce banking security standards, fraud detection procedures, and transaction idempotency across multi-million daily corporate transactions. ### Earlier Career Trajectory *(Leadership, Security & Corporate Finance)* - **Project Manager / IT Security Analyst (PrivatBank, 2014):** Designed payment fraud monitoring and transaction pattern analysis. - **Chief Executive Officer (Maxi-Service LLC, 2013 – 2014):** Scaled retail management company, established accounting & IT infrastructure. - **Deputy Chief Financial Officer / Senior Controller (PrivatBank, 2007 – 2013):** Controlled multi-million investment portfolios across metallurgy and logistics; modelled risk scenarios and prepared executive shareholder reporting. --- ## Education, Languages & Community - **National Mining University:** MSc Administrative Management (2007) | MSc Environmental Economics (2006) | MSc Mining Engineering (2005). Published 5 research papers in enterprise economic security (2006–2012). - **Languages:** English (Upper-Intermediate B2) | Ukrainian (Native) | Polish (Conversational) | Russian (Fluent). - **Community:** Technical & Music Coordinator across UK English and Ukrainian churches (coordinated 140+ multicultural services). - **Status:** UK Work Authorisation: Yes (No visa sponsorship required). References available upon request.