$ whoami
Cesar Quinteros
Senior .NET Developer & Software Architect
I build internal tools that connect systems, surface problems before customers find them, and fill the gaps between legacy platforms and modern infrastructure.
Selected Work
Projects
Cross-System Order Tracking Tool
Built a solo tool that tracked orders from the website through the OMS into fulfillment and final shipment, performing diffs across systems and emailing issues to teams so problems were caught proactively.
Data Extraction & Settlement Pipeline
Extracted needed fields from large, inconsistently populated JSON payloads produced by the OMS and landed them in SQL Server tables for financial settlement and loyalty tracking. AI suggested the approach; coded it to learn the mechanics.
Business Unit Data Migration Tool
Consolidated one business unit into another, handling vendor records across both legacy and modern databases (~15 stored procedures, temp tables). Also built a config-driven C# ETL tool for cross-database data movement.
Legacy Codebase Documentation Workspace
VS Code + AI workspace that generates architecture, data, and API documentation from existing codebases of departed developers. Second phase uses generated docs plus source to diagnose pasted error messages.
Task Tracking & Research Workspace
Acts like a secretary — records status, imported files, and research notes for any troubleshooting task, generating a fresh copy per issue.
Development Hub / Stand-Up Reporting Tool
Pulls status from program and task workspaces to support morning stand-up reporting. Still being refined.
Markdown Viewer
Lightweight C#/.NET viewer that runs installed or portable. Created because the IDE at the time could not preview Markdown cleanly.
Manatee Traffic Cameras
Live traffic camera viewer for Manatee County (FL511 + RTMC). Map of public street cameras with both live streams and refreshed stills — useful for traffic or post-storm conditions.
Self-Hosted Tools Suite
Collection of self-hosted utilities: DropVault (file sharing with metadata pages), DropLink (URL shortener), md·edit (browser Markdown editor), and a Pollution Notices Map. All Docker-deployed behind Cloudflare Tunnel.
MDRip Firefox Extension
Browser extension that extracts and downloads Markdown content from web pages. Published on AMO.
Android Markdown Previewer
Free, open-source Android app for previewing Markdown. Plan is to evolve it into a full editor.
Hermes Multi-Platform AI Agent
Multi-platform AI agent (Discord, Signal, Telegram) with specialist subagents and Kanban dispatch. Three instances at home: developer (10 specialist profiles), deployment, and researcher. Heavy OpenRouter API usage with local models as a future goal.
Home Lab Stack
Self-hosted infrastructure: Home Assistant + MQTT (smart home), Jellyfin (media server), Paperless-ngx + GPT (document management with AI classification), SearXNG (privacy metasearch), Ollama + Open WebUI (local LLM experimentation). All Docker-deployed on Ubuntu.
Skills & Stack
Skills
Languages
Frameworks
Infrastructure & Tooling
Data & Systems
Background
About
I have spent over 20 years at Bealls Inc., moving from managing the AS/400 team to leading the Order Management Systems group during a major platform migration. Today I build internal .NET tools that bridge legacy systems and modern infrastructure — cross-system diagnostics, data pipelines, and AI-assisted development workspaces. At home I run Linux daily and maintain a growing stack of self-hosted services: Docker containers behind Cloudflare Tunnels, AI agents, smart home automation, and privacy-focused tooling.
Philosophy
- Design for maintainability first — code is read far more often than it's written.
- Automate everything that can be automated, from tests to deployments.
- Bridge old and new — legacy systems still run the business; make them work with modern tooling.
- Self-host and own your infrastructure — privacy and control matter.