backend · databases · ai systems
Backend Engineer & Technical Lead
I design the architecture, own the database, and ship the product end to end. Most of my work lives behind the interface — APIs, data models, and the systems a business actually runs on.
Full-stack delivery, AI-assisted.
8 groups
11 records
Multi-tenant SaaS for deploying branded AI agents that answer from a client’s own documents.
Architected tenant isolation with row-level security on every table, keyed on business_id. Built the ingestion pipeline — chunking, embedding, and vector retrieval — plus token budgeting, API-key auth, encryption utilities, and rate limiting.
Architecture, API, data model
E-learning platform API spanning 28 domain modules — students, classes, evaluations, certificates, forums, and live sessions.
Designed a layered component architecture separating routing, network, and middleware concerns. Administered both MySQL and MongoDB stores. Wrote custom middleware for file upload, route protection, and permission validation, and set up CI/CD to AWS Elastic Beanstalk with a custom nginx configuration.
Back-end developer, DBA
REST API built on a strict layered separation of controller, store, network, and middleware.
Structured the codebase so each layer had a single responsibility and could be reasoned about independently. Implemented JWT authentication, a ranking system, and a transactional mail pipeline, with CI on GitHub Actions.
Back-end developer
Scraper suite that kept the internal parts catalog priced against competitors, informing real pricing decisions.
Built supplier and MSRP scrapers against distributor portals, then a reconciliation pipeline that merged fresh pricing into the master catalog while preserving row order. Handled freight-cost datasets and per-row error recovery so a single failure never stopped a run.
Lead developer
In-house WebSocket chat tool so staff across the shop and the sales floor could coordinate without external services.
Designed the message topology and connection handling for a small, always-on internal team, keeping the system self-hosted and dependency-light.
Lead developer
Mobile-first app for a WhatsApp outreach team working a daily queue of assigned leads.
Modeled the schema in Postgres with row-level security, RPC functions, and triggers enforcing assignment rules at the database layer. Handled timezone-correct day boundaries for America/Bogota, CSV lead import, and push notifications.
Data model, backend, delivery
Internal CRM with a companion browser extension for the outreach team.
Designed the lead and activity schema, then built a seller-monitoring subsystem on top of it. Bundled the Chrome extension with esbuild and covered the data layer with Vitest.
Data model, backend, extension
Telegram bot answering product and pricing questions for appointment setters, from a curated knowledge base.
Constrained the model to answer only from the knowledge base, and designed an escalation path that opens a DM ticket to an administrator when it cannot. Persisted the whitelist and conversation memory in SQLite on a mounted volume so state survives redeploys.
Design and implementation
Lead-generation pipeline that collects, enriches, and qualifies local business records.
Built a resumable pipeline with parallel workers and checkpointing so an interrupted run picks up where it stopped. Added geographic enrichment, a qualification scoring pass, and CSV export shaped for CRM import.
Design and implementation
Offline push-to-talk dictation for Windows — hold a key, speak, release, and the transcript lands at the cursor.
Ran Whisper large-v3-turbo locally on GPU so nothing leaves the machine. Diagnosed a Windows Smart App Control failure that blocked a decoder DLL and worked around it by stubbing the unused file-decoding path, since audio arrives from the microphone as an array.
Design and implementation
Turns an iPhone into a trackpad for a Windows machine over the local network.
Specified a validated WebSocket message protocol as a standalone package, with the gesture engine isolated and independently tested. Constrained the security model deliberately: LAN only, pair before control, mouse-only capability surface, strict payload validation, idle and pairing timeouts, and inbound rate limits.
Protocol, architecture, security model
live
index
4 records
Backend & Product Engineering
Internal platforms, AI services, and client delivery. Designed multi-tenant data models with row-level security, architected AI agent infrastructure, and built the internal tooling the sales and outreach teams run on.
Web Developer & Automation
Built WordPress sites for clients, developed lead-generation scrapers, and contributed to sales funnel construction.
Lead Developer
Came from the sales floor and built the systems after seeing the data problem firsthand. Developed scraper suites that kept internal catalogs priced against competitors, ran multiple data migrations and cleaning efforts, designed and created databases, and built real-time WebSocket tooling for internal communication.
Technical Leader · Database Administrator · Back-End Developer
Planned and executed delivery strategy across projects using agile methodology, and promoted code standards — commit hygiene, naming conventions, and flowcharting for structured task decomposition. Structured, implemented, and administered the company’s MongoDB and MySQL databases, maintaining data integrity and designing backup models against loss. Developed the APIs and services behind most company projects.
reach