Senior Software Engineer · Edmond, Oklahoma
Backend Engineering · Full-Stack Development · Platform Engineering
I'm Javier, a senior software engineer with 15+ years building production applications, enterprise integrations, and commerce systems. Today, I also develop AI-driven engineering tools with an emphasis on reliability, validation, and human oversight.
01 / Selected work
Independent and professional work spanning AI-powered SaaS, agentic developer infrastructure, marketplace architecture, and enterprise commerce.
01
AI-Powered E-commerce SaaS Platform
Designed and developed a full-stack SaaS platform for eBay sellers, combining AI-powered listing creation, listing analysis, marketplace integrations, and review-driven automation.
AI Engineering / Developer Infrastructure
A private, local-first engineering CLI with implemented components for guarded run states, bounded agent execution, revision-bound validation, review evidence, and explicit publication approval.
Marketplace / Full-Stack Engineering
A pre-launch women’s fashion marketplace in development, with implemented event-driven search and server-authoritative checkout workflows validated through repository and sandbox evidence.
E-commerce Systems / Integration Engineering
Four separate applications I developed for multichannel synchronization, mobile product publishing, competitive eBay pricing, and centralized inventory and order operations.
02 / Experience
From enterprise infrastructure to modern commerce platforms, my work has consistently centered on reliable systems and complex operational problems.
Full Stack Web Developer
Enterprise B2B commerce, backend services, integration architecture, data synchronization, production troubleshooting, and responsible AI-assisted engineering.
Full Stack Web Developer & E-commerce Consultant
Custom application delivery, marketplace integrations, commerce systems, and technical consulting alongside full-time roles.
Full-Stack Developer
Commerce systems and backend services using AWS Amplify, DynamoDB, ECS, and Cognito.
Full-Stack Developer
NestJS and Next.js commerce integrations with AWS and Apollo GraphQL, synchronizing approximately 65,000 products.
Web Developer & E-commerce Integration Engineer
Developed four separate applications: a multichannel dropshipping platform, a mobile product publishing system, an intelligent eBay pricing system, and an inventory and order management platform.
Web Developer
Frontend development in an early-stage real estate technology startup.
Founder & Technology Consultant
Entrepreneurship, technical consulting, custom software, and client project delivery.
Server Analyst
Enterprise infrastructure, server administration, troubleshooting, system reliability, and operational support.
03 / Technical expertise
Tools change. Sound decisions about boundaries, data, failure, and maintainability remain essential.
TypeScript · JavaScript · Node.js · NestJS · GraphQL · REST APIs
Next.js · React · Redux · Responsive systems · Accessible UI
AWS · Azure · ECS · Cognito · Observability · Production operations
PostgreSQL · DynamoDB · MongoDB · Redis · BullMQ · Synchronization
Codex · GitHub Copilot · Agent orchestration · Evaluation · Validation
Marketplaces · Payments · Inventory · Fulfillment · Vendor systems
04 / Engineering approach
AI can accelerate implementation. It does not replace ownership of the system.
Understand the business goal, constraints, and operational reality before choosing an architecture.
Make reliability, security, maintainability, and failure recovery first-class design inputs.
Use AI tools where they add leverage, then validate every change through testing, review, and engineering judgment.
Keep technical decisions connected to practical value for users and the business.
05 / Start a conversation
I’m interested in senior backend, full-stack, and platform engineering opportunities. I’m especially drawn to work involving integrations, operational correctness, and responsible agentic development.