Executive Summary

I’m a full-stack developer and systems builder who connects data, automation, and practical AI to deliver measurable outcomes. Since 2014, I’ve worked across e-commerce intelligence (Amazon/OA), high-volume web scraping, Google Sheets/App Script control planes, serverless backends on Google Cloud, Chrome extensions, and retrieval-augmented generation (RAG) flows using OpenAI, Gemini, or local (Ollama) models. My approach: design reliable pipelines, preserve data quality (barcodes, prices, URLs), add observability, and keep the UX fast and simple. I ship solutions that scale without drama—and are easy for teams to run daily.

Core Engineering Principles

• Reliability by design: resilient fetchers, retries/backoff, saved progress, resumable runs.
• Data hygiene first: preserve leading zeros, validate GTIN check-digits, normalize URLs/hosts.
• Small, composable services: REST/GraphQL APIs with clear contracts and structured logging.
• Security & secrets: least-privilege, token rotation, Secret Manager/KMS, CSP and SSRF awareness.
• Observability: Cloud Logging/Monitoring, error classes, latency budgets, actionable alerts.
• Human-in-the-loop: Sheets dashboards, color-coded states, concise summaries for quick review.

My Skills – API Integrations

• REST/GraphQL design with versioning, pagination, idempotency, and typed responses.
• Auth: OAuth 2.0, JWT, app-level tokens, key rotation on 429s with cooldown windows.
• Google Custom Search (CSE): query builders, date filters (e.g., dateRestrict), results cleansing, key/cx rotation.
• YouTube Data API: channel/video analytics, captions/comments processing, lead discovery.
• Shopify/Storefront/Admin: product, price, variants, inventory reads; webhooks and throttling.
• Stripe, Slack, Jira/Linear/ClickUp, Notion, Airtable, HubSpot: integrations for payments, alerts, and ops.
• OpenAI/Gemini/Ollama: embeddings, chat, function/tool calling for RAG and agents.
• Facebook/WhatsApp Business, Twilio: messaging flows with templates and opt-in compliance.

My Skills – Frontend

• HTML5/Accessibility: semantic structure, keyboard nav, ARIA patterns.
• CSS3: responsive layout, utility-first (Tailwind) or Bootstrap; component theming.
• JavaScript (ES6+): modular code, fetch/XHR, caching, client-side templating.
• WordPress: custom themes/plugins with performance and secure options pages.
• Perf: lazy images, async decoding, code-split, critical path CSS, CLS-safe UI.

My Skills – Backend

• Node.js (Express/Fastify) and Python (Flask/FastAPI) microservices.
• PHP for CMS glue and lightweight APIs when needed.
• AuthN/AuthZ: JWT/OAuth, signed URLs, HMAC checks, RBAC-ish guards.
• Resilience: connection pools, retries/jitter, circuit breakers, deadline/timeout discipline.
• File/CSV: streaming parsers, large merges, safe encodings (UTF-8), memory-bounded ops.

My Skills – Data & Storage

• Relational: Cloud SQL (Postgres/MySQL), migrations, indexes, EXPLAIN analysis.
• NoSQL: Firestore (document), Bigtable (wide-column) for hot KV or time-series access.
• Warehouse: BigQuery for aggregation/analytics, scheduled queries, cost controls.
• Caching: Memorystore (Redis/Memcached), cache keys, TTL strategies, stampede protection.
• Object storage: Cloud Storage for artifacts, signed downloads, lifecycle rules.

My Skills – Web Scraping & Automation

• Stacks: Python (requests/httpx, BeautifulSoup, lxml), concurrency (ThreadPool/multiprocessing).
• Anti-bot survival: user-agents, session reuse, proxy rotation, randomized pacing.
• Error handling: SSL quirks, 413/429/5xx backoff, resume-from-last progress markers.
• Extraction: JSON/JSON-LD parsing, robust CSS/XPath selectors, schema fallbacks.
• Outputs: CSVs with strict headers (Barcode, price_extracted, source_url), direct Sheets writes.

My Skills – E-Commerce Intelligence (Amazon / OA)

• Matching: retailer product → Amazon listing via UPC/EAN/GTIN, title/variant heuristics, embedded JSON-LD.
• Signals: Keepa metrics (e.g., BSR thresholds), ROI%, profit margin, brand-listing risk, stock/price deltas.
• Trust checks: website HQ, payment methods, CC acceptance, brand vs third-party listing risk.
• Workflows: per-retailer collections scrape, page limits/time caps, batch zip outputs, auto-download.
• Sheets ops: status color-coding, dedupe, URL cleaning, barcode check digits, PH-timezone stamps.

My Skills – Google Apps Script & Spreadsheet Ops

• CSE pipelines: date filters, key/cx rotation with 24h cooldown, 429 logging, per-row progress colors.
• Data shaping: column mapping/renames, delete empty cols, preserve leading zeros, URL normalizers.
• Utilities: auto-increment barcodes, dedupe by domain/slug, dynamic column widths, bold/wrap headers.
• Integrations: Drive/Sheets read-write, on-edit/on-trigger jobs, structured error reporting.

My Skills – Google Colab & Python Notebooks

• Scrape/ETL notebooks: batch URL fetch, progress bars, rotating proxies, safe timeouts.
• CSV merging: typed joins (e.g., Barcode), large file handling, PH-timezone naming.
• Artifacts: zip bundles, auto-download links, Drive uploads; reproducible environment cells.

My Skills – AI, RAG & Lightweight Agents

• Embeddings/RAG: chunking CSV catalogs, hybrid search, prompt-safe summaries, factual grounding.
• Models: OpenAI, Gemini, and local (Ollama) when privacy/cost/latency requires.
• Agents: tool chaining (search → fetch → match → verify), failure surfaces, human-readable rationales.
• Evaluation: precision/recall sets for product matching and dedupe, regression dashboards.

My Skills – Chrome Extension Development

• MV3 service workers, content scripts, cross-tab messaging, storage sync/local.
• In-page extraction: parse dynamic product pages, emphasize JSON-LD and API calls.
• Secure backends: signed requests, throttled endpoints, granular permissions.

My Skills – Google Cloud Platform

I deploy practical, cost-aware architectures on GCP: Cloud Run for containerized HTTP services, Cloud Functions for light triggers, Cloud Scheduler/Tasks for orchestration, Pub/Sub for decoupled events, Firestore/Cloud SQL for app data, BigQuery for analytics, Bigtable/Redis for hot reads, Secret Manager/KMS for secrets/keys, and Cloud Build/Artifact Registry for CI/CD. Logging/Monitoring/Error Reporting keep services observable and calm.

• Cloud Run, Cloud Functions, App Engine, Cloud Build, Artifact Registry
• Cloud Scheduler, Cloud Tasks, Pub/Sub, Eventarc, Workflows
• Cloud SQL, Firestore, BigQuery, Bigtable, Memorystore (Redis/Memcached)
• Cloud Storage, Cloud CDN, Cloud Load Balancing, Cloud DNS, VPC/Firewall
• Secret Manager, Cloud KMS, Cloud Logging/Monitoring/Error Reporting
• Vertex AI (embeddings/hosting when suitable)

Selected Projects (Snapshots)

• Shopify Collections Scraper: batch collections with time caps, concurrent workers with safe backoff, outputs normalized CSVs (Barcode, price_extracted, source_url), auto-zip and auto-download.
• Sheets-Driven CSE Discovery: key/cx rotation, one-week filter, per-row color states, and error classes for quick triage.
• Amazon Matching Assistant: UPC/variant/title matching with RAG-style evidence, highlighting brand vs third-party risk and estimated ROI/BSR signals.
• Chrome Extension (MV3): page augmentation to surface JSON-LD/structured data, one-click export to Sheet/API.

Roles & Collaboration

I act as a full-stack engineer, data plumber, and ops enabler. I document assumptions, keep handoffs crisp, and make systems runnable by non-engineers through Sheets dashboards and clear logs. I’m timezone-aware and comfortable coordinating across teams and tools (Slack/Jira/Linear/ClickUp).

Tooling & Stack Overview

• Languages: JavaScript/TypeScript, Python, PHP
• Frameworks: Express/Fastify, Flask/FastAPI, WordPress
• Data: Postgres/MySQL, Firestore, BigQuery, Bigtable, Redis
• Infra: Cloud Run, Cloud Functions, Scheduler/Tasks, Pub/Sub, Secret Manager, KMS
• Scraping: requests/httpx, BS4/lxml; proxy rotation; concurrency controls
• AI: OpenAI/Gemini, Ollama; embeddings, RAG, agents
• DX: Cloud Build, Artifact Registry, lint/test, structured logs, error reporting

What You Can Expect

• Clear problem framing, minimal viable pipeline, and measured iterations.
• Strong data guarantees: consistent headers, preserved barcodes, normalized URLs.
• Operational clarity: dashboards, logs, and lightweight runbooks.
• Security hygiene: secrets isolation, least-privilege credentials, and regular key rotation.
• Scalable results: from single-run notebooks to scheduled, observable services.

My Skills – API Integrations (Legacy Summary)

• RESTful APIs: Designing and consuming RESTful APIs for seamless data exchange between applications.
• GraphQL: Implementing and querying data using GraphQL, focusing on efficient data fetching and reduced over-fetching.
• API Authentication and Authorization: Implementing secure authentication mechanisms (e.g., OAuth 2.0, JWT) and managing authorization policies.
• Data Serialization and Deserialization: Working with JSON and XML for API communication.
• API Testing and Documentation: Postman/Swagger UI and contract documentation.

My Skills – Frontend (Legacy Summary)

• HTML5: For structuring web content.
• CSS3: Responsive design with Bootstrap/Tailwind.
• JavaScript: ES6+ features and dynamic UI.
• WordPress: Theme and plugin development.
• Bootstrap: Rapid prototyping with components.

My Skills – Backend (Legacy Summary)

• Node.js: Scalable server-side apps.
• Apps Script: Google Workspace automations.
• Python: Django/Flask/FastAPI backends.
• Automation and AI: Practical agents and pipelines.
• API Development: REST and GraphQL.