Jhuan
Camargo

• Backend · Multi-tenant REST API in Django and Django REST Framework, with JWT authentication.
• Frontend · Vue 3 with Vuetify, Pinia and Chart.js.
• Integrations · NF-e/NFC-e through a fiscal API with XML generation, Stripe, Mercado Pago (card and PIX) and Excel reports.
• Infrastructure · Docker Compose with PostgreSQL 15, Gunicorn, Nginx and Certbot SSL, backups and hardening (CSP, HSTS). Query optimization cut latency by 40%.

Fixed Sessions dropped when returning to the tab: several requests refreshed the token at once. A single refresh queue fixed it.

• Python
• Django
• DRF
• JWT
• Vue 3
• Vuetify
• Pinia
• PostgreSQL
• Docker
• Nginx
• Stripe
• Mercado Pago

• I diagnose and fix critical production incidents: import failures, UTF-8/Latin-1 encoding and constraint violations.
• I maintain and evolve legacy VB6 systems; I write queries, functions and stored procedures in PostgreSQL and SQL Server.
• I monitor with Grafana and Zabbix and document every incident as Fact / Cause / Action.

• VB6
• PostgreSQL
• SQL Server
• Stored procedures
• Grafana
• Zabbix
• SourceSafe

• Mobile-first interface in React and Vue.js.
• Cut the application flow to under 2 minutes.

• React
• Vue.js
• JavaScript

• Image recognition to identify on-screen elements and act on them precisely.
• Python license server with Flask: REST API, user authentication, monthly keys and update delivery.
• Docker and Nginx infrastructure serving concurrent users in several countries.

• Python
• Flask
• REST API
• Computer vision
• Docker
• Nginx

• Engine · C++23 server with CMake and vcpkg (Asio, spdlog, OpenSSL): gameplay, networking and performance fixes in the core.
• Gameplay · 1,500+ Lua scripts: combat, participation-based boss rewards, economy, crafting, guilds, market and item-duplication protection.
• Client and UI · C++ client with OpenGL, shaders and LuaJIT, including a mobile version; in-house design system for the game windows.
• 2D art and world · sprites and pixel art, particles and multi-floor map editing.
• Launcher · Windows app with auto-update, server status and installer.
• Web platform · PHP 8.3 with Twig templates, MariaDB, Apache and Cloudflare; webhook payments and a Docker staging environment.
• Wiki and docs · MediaWiki wiki, interactive JavaScript map with Leaflet (321 markers, 16 floors) and an in-game encyclopedia.
• Operations · Docker deploys on a Linux VPS, release pipeline, backups, DDoS mitigation (iptables), security audit and Discord ticket support.

Fixed Item attack speed had no effect. I measured the interval between hits in milliseconds with a test script and found the cause in the C++ event scheduler, not in the formula.

• C++23
• CMake
• vcpkg
• Lua
• OpenGL
• PHP 8.3
• Twig
• MariaDB
• MediaWiki
• Leaflet
• Docker
• Linux
• Cloudflare

• Three conversion modes: deep learning (HED) for photos, Otsu for scans and Canny for digital images.
• Also converts DXF into hatch patterns (PAT) and map data into DXF.
• Validated by an architecture studio on real projects.

Fixed A shadowed photo produced 5,340 noisy lines. With HED it became 187 clean ones.

• Python
• FastAPI
• PyTorch
• OpenCV
• EasyOCR
• ezdxf
• Docker

• Web scraping and PDF table extraction, with raw-text fallback and data standardization.
• Financial data loading and analysis in PostgreSQL, Python API and Vue interface with Vuetify.

• Python
• Pandas
• Flask
• PostgreSQL
• Vue
• Vuetify
• pytest

• Next.js with TypeScript and API routes; data in Redis (Upstash).
• Scheduling with GitHub Actions: a job calls the check endpoint every 5 minutes and sends the Web Push.

• Next.js
• TypeScript
• Redis
• Web Push
• Tailwind
• GitHub Actions

• The team then evolved the system on that base with a fork and pull-request workflow.

• Python
• FastAPI
• SQLAlchemy
• Vue 3
• Tailwind
• PostgreSQL
• Docker

• Knowledge base indexed with embeddings and FAISS; the passages closest to the question form the answer context.
• Similarity threshold to identify when the knowledge base has no answer.

• Python
• RAG
• FAISS
• Azure OpenAI
• Streamlit