{ "name": "Grzegorz Hul", "title": "Senior Flutter Developer, AI-augmented", "summary": "I build Flutter apps and the AI features inside them. 8 years in software, nearly 7 of them at LIBRUS, Poland's largest ed-tech, with Flutter since 2021. I ship with Claude Code every day; every change is tested, and in company code every diff is reviewed by me.", "contact": { "email": "grzegorz.hul@gmail.com", "website": "https://devgreg.eu/", "github": "https://github.com/gregorh1", "linkedin": "https://www.linkedin.com/in/grzegorzhul", "location": "Poland (CET)" }, "cv": { "en": "https://devgreg.eu/cv.pdf", "pl": "https://devgreg.eu/cv-pl.pdf" }, "availability": "Open to B2B subcontracting: 8-12 h/week, async (invoice, EU VAT)", "experience": [ { "role": "Senior Mobile Developer (Flutter)", "company": "LIBRUS", "period": "Dec 2019 - Present", "description": "Mobile apps of Poland's largest ed-tech: the parent and student app and the Teacher app.", "bullets": [ "Developed the production parent and student app (Vue 2, Cordova; iOS, Android, Huawei; 5M+ downloads on Google Play) for nearly 7 years: 1,000+ commits, 468 tickets, 28 releases prepared.", "Built core features of the LIBRUS Teacher app in Flutter from 2021: offline-capable messaging, timetable, video training with certificates (~300 commits).", "Brought ~20 modules of the new Flutter app to WCAG 2.2 AA (screen readers, contrast tests); earlier shipped an accessibility mode with automated axe-core tests in the Cordova app." ] }, { "role": "Flutter & AI Developer", "company": "Self-employed", "period": "Feb 2023 - Present", "description": "Own products and B2B work, built with coding agents: Flutter apps, AI backends and a self-hosted agent platform.", "bullets": [ "Built 6 Flutter apps with coding agents in ~6 weeks (354 commits, ~2.4k tests); 3 are live on Google Play.", "Built and run AnalizaPrawna.eu: a ReAct agent with 8 tools over 527k Polish court rulings, 139 API endpoints, ~2.8k tests.", "Run my own infrastructure as code: 4 Linux servers with Docker Compose, Traefik, Cloudflare and a GPU for local LLMs; resolved 4 incidents with root cause, including an ISP move to CGNAT handled within a day." ] }, { "role": "Junior Frontend Developer", "company": "E Net Production", "period": "Sep 2018 - Sep 2019", "description": "Front-end development, Katowice." } ], "projects": [ { "title": "AnalizaPrawna", "type": "own product", "description": "AI legal analysis platform: a ReAct agent with 8 tools over 527k Polish court rulings (pgvector, self-hosted Polish embeddings on GPU, model failover). 139 API endpoints, ~2.8k tests.", "tech": [ "React", "TypeScript", "Express", "PostgreSQL + pgvector", "LLM agents", "PayU" ], "links": { "live": "https://analizaprawna.eu" } }, { "title": "Revelations", "type": "own app", "description": "Polish-language Flutter reader of Maria Valtorta's work: user data migrated from the old Cordova app, 1,534 chapters offline, a 714-file audiobook from self-hosted TTS, ~710 tests.", "tech": [ "Flutter", "Riverpod", "Firebase", "XTTS-v2" ], "links": { "playStore": "https://play.google.com/store/apps/details?id=pl.devgreg.valtorta" } }, { "title": "StepPause", "type": "own app", "description": "Android step counter with a pause button for drives and bike rides, built after Samsung Health dropped the feature: a custom Kotlin bridge to Health Connect, Play Billing, 15 languages, 670 tests.", "tech": [ "Flutter", "Riverpod", "Drift", "Kotlin", "Health Connect", "Play Billing" ], "links": { "playStore": "https://play.google.com/store/apps/details?id=com.steppause.steppause" } }, { "title": "devbot: agent platform", "type": "own platform", "description": "Self-hosted platform where Claude Code agents take tasks from chat and from repos, with one session per channel, and close them only against a Definition of Done with tests and visual QA. ~680 chat tasks and 239 repo tasks since April 2026.", "tech": [ "Claude Code", "OpenClaw", "Agent Skills", "Subagents" ], "links": {} }, { "title": "sound_clearing", "type": "own platform", "description": "AI audio and OCR platform: text-to-speech with XTTS-v2, speech-to-text with Whisper and OCR, run by 5 GPU workers behind 58 API endpoints; 611 tests.", "tech": [ "Python", "FastAPI", "Whisper", "XTTS-v2", "Celery", "Redis", "Docker" ], "links": {} }, { "title": "ksrw.pl", "type": "pro bono", "description": "Moved an association's website from Weebly to a custom static generator, redesigned with Claude Design: 47 URLs, eleven 301 redirects, Playwright checks at 6 widths gating the build.", "tech": [ "Static site generator", "Claude Design", "Playwright", "Python" ], "links": { "live": "https://ksrw.pl" } }, { "title": "teologiakatolicka.pl", "type": "pro bono", "description": "Migrated a legacy theology portal to Ghost 6: 858 posts, 98.8% sentence-level match with the source.", "tech": [ "Ghost 6", "Node.js", "Cheerio", "Migration QA" ], "links": { "live": "https://teologiakatolicka.pl" } }, { "title": "Holy See Pavilion, EXPO 2020", "type": "pro bono", "description": "Visitor guide app for the Holy See Pavilion at EXPO 2020 Dubai: 5 languages including Arabic (RTL), content from WordPress over REST. Built in 2021-2022, before AI coding tools.", "tech": [ "Flutter", "BLoC", "WordPress REST API", "i18n + RTL" ], "links": {} }, { "title": "blz-legal.pl", "type": "pro bono", "description": "WordPress website for a law firm, built on a child theme of Dixon (ThemeREX) in 2020.", "tech": [ "WordPress", "PHP", "Child theme" ], "links": { "live": "https://blz-legal.pl" } } ], "skills": { "Mobile": [ "Flutter (5+ years)", "Dart", "flutter_bloc", "Riverpod", "go_router", "Drift (offline-first)", "Kotlin platform code", "Health Connect", "Play Billing & IAP", "i18n (15 languages, RTL)", "Store releases", "Cordova" ], "AI & ML": [ "LLM integration", "RAG (pgvector HNSW)", "Self-hosted embeddings (TEI)", "ReAct agents & tool calling", "Streaming (SSE)", "Model failover", "LLM evaluation (LLM-as-judge)", "Guardrails & prompt injection tests", "Whisper STT", "XTTS-v2 TTS", "OCR with vision models", "Ollama" ], "Agentic engineering": [ "Claude Code", "CLAUDE.md conventions", "Agent Skills", "Subagents", "Hooks", "MCP", "Headless runs", "Claude Design" ], "Web & backend": [ "React 19", "TypeScript", "Vite", "Tailwind CSS", "PWA", "Node.js / Express (TypeScript)", "Python / FastAPI", "Celery", "REST API", "PayU payments", "Ghost themes", "WordPress", "Go (basics)", "Vue 2" ], "Data & DevOps": [ "PostgreSQL + pgvector", "Redis", "SQLite (Drift, FTS5)", "Firebase", "Linux", "Docker Compose", "Traefik", "Nginx", "Cloudflare", "GPU self-hosting", "Prometheus + Grafana" ], "Testing & quality": [ "flutter test (unit, golden, integration)", "Vitest", "Jest", "pytest", "Playwright", "WCAG 2.2 AA", "axe-core" ] }, "howIWork": { "withAI": [ "Claude Code every day since Dec 2025 (683 sessions), with my own conventions, skills and subagents.", "A self-hosted agent pipeline takes tasks from chat and from repos and closes them only against a Definition of Done with tests and visual QA.", "A human signs off every change: in company repos every diff is tested and reviewed by me, and about two thirds of my 2026 commits are openly labelled AI-assisted." ], "together": [ "Async and in writing (Polish, English)", "Fixed weekly capacity: 8-12 h/week", "B2B invoice (EU VAT)", "Happy to start with a small paid test task" ] }, "languages": [ { "name": "Polish", "level": "native" }, { "name": "English", "level": "professional, written" } ], "certifications": [ { "name": "AI_devs 3 Agents", "detail": "course on LLM apps and AI agents", "period": "Dec 2024", "url": "https://credsverse.com/credentials/8cf1b62c-4a32-4bfc-9ce8-446d7ddb1338" } ] }