Leopoldo H.

I help Amazon sellers and software teams turn Seller Central chaos into systems that protect margin: Amazon SP-API and Amazon Ads API integrations, data pipelines, AI command centers, and repricing automation. Top Rated, 100% Job Success Most sellers I work with are profitable and still flying blind. Sales, fees, ad spend, and inventory live in five different exports, so decisions get made on gut feel and last month's spreadsheet. The cost of that is invisible until you fix it: overspent ad budgets, out of stocks on winners, hours of skilled people doing copy-paste work. WHAT YOU GET ✅ One set of numbers you can trust. Your sales, fees, advertising, and inventory data flow automatically into one place and actually reconcile. One client's team got back six hours per analyst, every single week. ✅ Ad spend that stops leaking. Automated wasted-spend audits, search term negation, and bid and budget rules on the Amazon Ads API. You keep the sales, cut the spend that never converts. ✅ The Buy Box, more often. I built RepriceLab, a repricer with paying subscribers competing across 12+ Amazon marketplaces. Same engine, tuned to your catalog and your floor prices. ✅ An AI command center for your store. Ask Claude a plain-English question like "what changed in our margin last week and why" and get a real answer pulled live from Seller Central, Amazon Ads, Google Ads, Shopify, and ShipStation. The biggest one I run has 130 tools behind it for a DTC brand. ✅ Nothing that puts your account at risk. I am an Amazon-approved third-party developer with PII approval. Access goes through Amazon's official authorization, no passwords, no scraping, and you can revoke it in one click. WHY SELLERS PICK ME OVER A CHEAPER DEV Because the expensive part is never the code. It is the month you lose when a fragile script silently stops syncing and your numbers drift. Everything I ship includes the boring parts that keep it alive: retries, monitoring, logs, and an audit trail. I run my own product in production, so when something breaks, I feel it before my clients do. THREE WAYS TO START 1. A 60-minute consultation ($149). Bring your messiest problem. You leave with a diagnosis and a written plan you can execute with me or without me. 2. A fixed-scope Project Catalog package. One clear deliverable, one price, one deadline. 3. A small hourly task first. See how I work before you commit to anything bigger. Tell me your marketplace regions, what you are trying to see or automate, and your current stack. You will get a specific answer, not a canned pitch. FOR YOUR DEVELOPERS If a technical person is evaluating this, here is the depth behind the bullets. Amazon SP-API: OAuth and LWA token management, orders, inventory, listings, catalog, reports, feeds, pricing, product fees, financial events, notifications via SQS and EventBridge, restricted data tokens, and PII-safe handling under Amazon's data protection policy. Private and public app registration, security questionnaires, and PII review readiness. Amazon Ads API: campaign management and reporting across Sponsored Products, Brands, and Display, search term reports, bid and budget operations, Marketing Stream ingestion, and multi-account, multi-profile pipelines. Data engineering: ingestion into BigQuery or PostgreSQL, scheduled and event-driven jobs, idempotent backfills, rate-limit-aware queueing, reconciliation checks, and alerting on drift or failed syncs. MCP servers: private Model Context Protocol servers for Claude and Codex with scoped tools, per-action guardrails, approval steps for writes, and full audit logging. Stack: Python, FastAPI, TypeScript, NestJS, PHP, Laravel, PostgreSQL, BigQuery, AWS, Google Cloud, Shopify, Mercado Libre. Based in Montevideo, Uruguay. US business hours. Native English and Spanish.