Software engineer based in Kraków, Poland. I build data-intensive backend pipelines in Python, spatial and graph analytics systems, and high-performance web applications in Next.js and TypeScript.

Academic background in Applied Mathematics (Cracow University of Technology, 2020–2022) and Electronics & Telecommunications (AGH University of Krakow, 2019–2020). My engineering workflow combines low-level algorithmic problem solving with modern agentic orchestration (Model Context Protocol).

Domain	Technologies
Languages
Backend & Data
Frontend & Web
Cloud & DevOps

Python · GeoPandas · C-GEOS · Next.js 16 · Deck.gl · DuckDB

• 60% RAM reduction: Slashed memory usage and fixed Cartesian OOM errors across a 9,550-transaction dataset by vectorizing geometry calculations in C-GEOS (NumPy .values) and replacing resource-heavy groupby joins with in-place .transform('sum').
• Urban physics & gravity modeling: Implemented Huff gravity models ($\text{pull} = e^{-0.005 \cdot \text{dist}}$) with rank-based service cannibalization penalties and Shannon information entropy ($H = -\sum P_i \log_2(P_i + \epsilon)$) for urban diversity scoring.
• 16-step automated ETL: Ingests GTFS schedules (85+ operators), extracts OSM PBF infrastructure via C++ osmium-tool, and allocates census population grids across overlapping isochrones.
• Spatial dashboard: Interactive visualization built with Next.js 16, React 19, Deck.gl v9, MapLibre GL, and embedded DuckDB.

Next.js 16 · React 19 · Turborepo · Sanity CMS · Shopify API · FastAPI · Oracle Cloud (OCI) · Puppeteer

• Lighthouse 98+/100 (FCP < 1.0s, TBT ~0ms): Marketplace monorepo (583 commits) using LazyMotion (-55KB bundle), tree-shaking (sideEffects: false), critical CSS inlining, cookie-based hydration skeletons (CLS = 0), and viewport-aware WebGL rendering pauses.
• Zero-disk video generation (image2pipe): Node.js script streaming raw Chromium frames (Puppeteer) directly to FFmpeg stdin over POSIX pipes, generating <80KB WebM previews without writing temp files to disk.
• Dynamic Sales Architecture: B2B personalization ("Magic Links") where React Server Components extract URL search params (?name=&city=&phone=) and render custom client previews in <1s.
• Production Cloud Deployment (Oracle Cloud OCI): Lead generation engine deployed on Oracle Cloud Infrastructure (Ampere A1 Flex VPS) as a persistent systemd daemon (leadfinder.service) with auto-restart, containerized Docker scrapers, asyncio.to_thread WHOIS enrichment, and NASK anti-ban jitter.

TypeScript · Next.js 14 · Playwright · Ollama (Local LLM) · LaTeX · Docker

• Deterministic data extraction: Eliminated hallucinations in local 9B models (Ollama gemma4) by parsing structured salary and contract data directly from React Query dehydrated states (__NEXT_DATA__) and raw DOM trees.
• Evaluation latency down to 9s (from 45s): Stripped recommendation containers in Playwright, cut prompt size from 8000 to <500 tokens, and inverted output ordering to generate scoring summaries first.
• Sub-second CV recompilation (<1s): 3-tier JSON cache (L1/L2/L3) allowing instant pdflatex recompilation of tailored resumes without repeating AI calls.
• 28-portal crawler: Scraping engine with Cloudflare WAF evasion (Playwright stealth).

Python · Neo4j GDS · FastAPI · SQLite WAL · Next.js 16 · Three.js

• 4x faster XML dump parsing: Regex pre-check filter skipping 90%+ of non-infobox articles before mwparserfromhell AST tokenization.
• 400% faster bulk insert: Tuned SQLite WAL pragmas (cache_size=-256000 for 256MB RAM cache, synchronous=OFF).
• Neo4j Graph Data Science: Pre-computed PageRank, Louvain Community Detection, and Leiden clustering cached in SQLite for O(1) API response times.
• 3D Force Graph UI: Three.js and react-force-graph-3d visualizer rendering at 60 FPS using a Golden Angle spiral layout ($\theta = \pi \cdot (3 - \sqrt{5})$).

Antigravity CLI · Gemini CLI · Claude Code · Cursor IDE · MCP Protocol

• 24 modular skills: Instruction suites covering spec-driven development, QA/TDD, backend architecture, stealth scraping, and code review.
• 10 operational rules: Strict execution gates enforcing PRAR loops, zero-speculation facts, TypeScript compilation checks (npx tsc --noEmit), and root-cause debugging.
• Model Context Protocol (MCP) integrations: Custom harness for GitHub API, Chrome DevTools, Puppeteer, MemPalace Graph Memory, and Oracle OCI.

• Freelance Software Developer / Platform Creator (12.2025 – Present)

  • Architected and delivered commercial monorepos (Turborepo, Next.js 16, FastAPI, Sanity.io, Shopify Storefront API, n8n, Resend).
  • Deployed and managed B2B lead generation engines on Oracle Cloud Infrastructure (Ubuntu VPS, systemd daemon, Docker).
  • Designed dynamic personalization engines ("Magic Links") delivering custom client previews in under 1 second.

• Technical Mentor & IT Support | Giganci Programowania (01.2024 – 06.2025)

  • Conducted daily live code reviews and resolved environment/runtime issues (C++, Python, Unity, compilers, SDK paths) for 50+ students weekly.
  • Delivered B2C demonstration workshops and explained object-oriented programming, data structures, and memory concepts.

• Clearance Broker / Customs Operations Specialist | FedEx Express Ireland (03.2022 – 07.2023)

  • Audited and processed 50–100 customs entries daily under a 98% SLA target, managing incident triage (L2/L3) and ensuring Incoterms/HS tariff compliance.
  • Handled daily cross-border operational communications in English (Cambridge CAE certified).

• Executive Board Member / Regional Director | Ogólnopolska Federacja Młodych (05.2019 – 06.2020)

  • Managed operations, regional office, and public grant budgets (FIO) for an NGO network of 350+ members.