AWS Certified · Senior Vue.js Certified

Building production systems for fintech, healthcare, and e-commerce

I'm Alejandro Joel Torres González. 11+ years as a Senior Full-Stack Engineer — Vue 3, Nuxt, Go, Python, AWS. I drive architectural decisions through written technical proposals and turn unreliable services into ones teams can rely on.

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Architecture & Decisions

Driving architectural change through written architectural proposals (ADRs) — covering trade-offs in security, RBAC, SSR vs SPA, and microfrontend orchestration with Single-SPA and Nuxt 3.

Production Reliability

Taking ownership of unstable systems and turning them around — Go concurrency debugging (race conditions, mutex), database performance tuning, and production on-call with post-mortems.

Full-Stack & Modern Tooling

Vue 3 / Nuxt 3 on the frontend, Go and Python (FastAPI) on the backend, deployed on AWS and Cloudflare. Production LLM integration (OpenAI, Anthropic) for real product workflows.

Technical Arsenal

A comprehensive stack designed for performance, security, and scalability across the entire development lifecycle.

Frontend

Primary Certified Senior Vue.js Developer
Vue 3 (Composition API) Nuxt 3 TypeScript
Secondary
React Next.js JavaScript
Foundations
HTML CSS SASS Tailwind Figma
Architecture
Single-SPA microfrontends Clean Architecture RBAC API Design SSR (Nitro)
Testing
Vitest Vue Test Utils Vue DevTools Jest React Testing Library

Backend

Primary
Go (concurrency, goroutines, channels, mutex) Python (FastAPI, Flask, Pandas)
Go ecosystem
Gin Fiber GoMock GORM
E-commerce backend
PHP Laravel CodeIgniter Magento 2
Node ecosystem
Node.js Nest.js Express.js
APIs
GraphQL (Apollo) REST Insomnia Postman
Workflows
Event-driven architecture Netflix Conductor AWS Lambda (TypeScript)

AI / LLM

Production LLM integration
OpenAI API Anthropic API Prompt engineering Retrieval workflows
Use cases
Automation Search User workflow enhancement

Databases, Cloud & DevOps

Relational databases
PostgreSQL MySQL MariaDB SQL Server Oracle (PL/SQL)
Legacy integration
IBM DB2 ICG ERP
AWS AWS Certified Developer — Associate
Lambda EC2 S3 CloudFront DynamoDB
Edge & hosting
Cloudflare Pages Google Firebase
Containers
Docker Kubernetes Image creation Orchestration
CI/CD
GitHub Actions Production deployment automation
Auth & Identity
Auth0 SSO RBAC reCAPTCHA

Professional Journey

  1. Current

    Lead Software Engineer

    Zaelab (formerly Techmates Group) ·

    Lead engineer for multinational clients including 3M Health / Solventum and Doosan. Primary engagement on Solventum's Payment Portal and Customer Onboarding platform — serving dental clinics, healthcare providers, and distributors for invoice payments and product ordering. The platform progressively migrates legacy data from IBM DB2 into 3M's VIAX ecosystem through GraphQL and event-driven orchestration workflows.

    ★ Authored the architectural decision records that shifted the platform to a Nuxt 3 SSR root-orchestrator pattern, replacing a less secure client-side SPA. The new architecture moved secrets and VIAX/reCAPTCHA token handling server-side, enforced RBAC at both the route and GraphQL proxy layers, and preserved compatibility with existing Single-SPA microfrontends.

    Show details (7 highlights) ▾
    • Worked within an event-driven orchestration layer (AWS Lambda + Netflix Conductor, TypeScript) coordinating multi-step processes against IBM DB2 — the legacy system of record — designing the integration contracts and failure handling so users never block on mainframe latency
    • Designed and implemented server-enforced RBAC using Nuxt route and server middleware resolving roles and permissions from VIAX GraphQL on the server, denying restricted routes and API operations before render — replacing client-only checks
    • Built a bulk import service for internal user provisioning, replacing a manual one-by-one onboarding process and removing a recurring operational bottleneck
    • Automated CI/CD pipelines with GitHub Actions and Cloudflare Pages across three production applications, standardizing deployments
    • Lead engineer on the Payment Portal and Customer Onboarding applications (separate internal-staff and public-facing surfaces), built with Nuxt 3, TypeScript, and GraphQL
    • Led code review and technical mentorship; collaborated across regions with backend, QA, UX, and product teams
    • Earlier in the engagement, contributed as a Vue 3 (Composition API) developer to a Doosan quoting application built on Clean Architecture principles, owning a specific module end-to-end and participating in release operations
    • TypeScript
    • Node.js
    • GraphQL
    • AWS Lambda
    • Netflix Conductor
    • Nitro (server middleware, server routes)
    • IBM DB2 integration
    • GitHub Actions
    • Cloudflare Pages
    • Nuxt 3
    • Vue 3
    • Single-SPA
    • Clean Architecture

  2. Senior Software Engineer

    MercadoLibre (Mercado Pago) ·

    Senior engineer on Mercado Pago's internal applications team — building React + Go tooling used daily by Mercado Libre's operations, support, and finance teams to manage refunds, internal money-movement, and cross-application data lookups.

    ★ Raised SLO from ~60% to a sustained 95–98% over several months by diagnosing and fixing widespread Go panics caused by race conditions in concurrent goroutines, introducing proper mutex usage, rebuilding error handling on the React frontend, and adding read indexes to multi-million-row tables that were degrading query performance.

    Show details (7 highlights) ▾
    • Took over technical leadership of "Cashbacks", a critical refunds and gifting platform, after the original Go backend engineer left. Originally hired as the frontend engineer, I picked up the Go backend out of necessity and led the technical recovery of the app end-to-end
    • Owned end-to-end the development of an annual budget module on top of the now-stable Cashbacks platform — covering both Go backend and React frontend
    • Proposed and built a shared Go library for the internal approvals API, standardizing how every internal app requested approvals — eliminating duplicated integration logic and inconsistent error handling across the platform
    • Built async/concurrent Go services processing daily batches of 20k–40k records against tables with millions of rows, integrating with multiple internal Mercado Pago APIs — work that built deep practical experience in Go concurrency patterns (goroutines, channels, mutex)
    • Participated in production on-call rotation, responding to incidents at any hour with hotfixes and authoring post-mortems for several outages — including ones I personally led to root-cause and resolution
    • Contributed to OneSource (cross-application lookups) and Transfer (internal transfers) as part of the same React + Go internal-platforms ecosystem
    • Acted as technical reference (referente) for a 4-person team that scaled to multiple 4–5 person squads, mentoring engineers and participating in technical hiring interviews
    • React
    • TypeScript
    • Go (concurrency-heavy: goroutines, channels, mutex)
    • PostgreSQL/MySQL
    • Internal MELI infrastructure
    • RESTful APIs

  3. Full-Stack Engineer

    Summa Solutions ·

    Full-stack engineer in a 4–5 person team building and maintaining the Magento 2 e-commerce platform for Tienda Naranja, one of Argentina's largest online marketplaces and a direct competitor to Mercado Libre.

    ★ Sustained zero-incident operation through three consecutive high-traffic events — Hot Sale, Black Friday, and Cyber Monday — Argentina's most demanding e-commerce traffic peaks of the year, contributing to the platform's stability during 10x+ traffic spikes.

    Show details (9 highlights) ▾
    • Customized the Magento 2 checkout flow — one of the most complex areas of the Magento ecosystem — to support the client's specific UX and business requirements, including multi-step adjustments and custom validations
    • Built a Pickit integration for the checkout that displayed pickup points on an interactive map, allowing customers to select a physical pickup location as a shipping option
    • Integrated Algolia search into the storefront, customizing the indexing pipeline through Magento event hooks to adjust how specific product attributes were read and pushed to the index — supporting the client's product discovery and faceted search experience
    • Implemented Auth0-based Single Sign-On (SSO) integrated with custom Laravel services, unifying authentication across the client's e-commerce and internal applications
    • Owned several Magento 2 minor-version upgrades (multiple cycles within the 2.1.x branch and beyond), coordinating module compatibility, regression testing, and production rollouts
    • Executed production deployments on AWS + Kubernetes as part of the team's release rotation, building on AWS experience accumulated since 2018 to operate confidently within the existing CI/CD pipeline
    • Developed promotional landing pages for marketing campaigns, working closely with the client's marketing and design teams
    • Wrote Python automation scripts to streamline operational and reporting workflows for the team
    • Participated in Agile ceremonies, code reviews, and technical documentation as part of the engineering team
    • Magento 2
    • PHP
    • JavaScript
    • Laravel
    • Auth0
    • Algolia
    • AWS
    • Docker
    • Kubernetes
    • Python

  4. Sole Developer / Founding Engineer

    Opera Inversiones Urbanas S.A.S ·

    Sole developer for the company's full tech operation, building and operating every web product end-to-end across the parent company and its startup venture Boho Food Market — a multi-vertical gastronomic concept combining a fresh-food market (produce, fish, butchery, bakery, wine cellar), restaurants on upper floors, and Boho Expo, a curated marketplace for independent artisans (clothing, accessories, jewelry).

    ★ Built and operated two production e-commerce sites end-to-end — bohofoodmarket.com and bohoexpo.com — both as multi-website, multi-language (EN/ES) Magento 2 platforms with 20k+ SKUs.

    Show details (7 highlights) ▾
    • Designed and developed multiple Magento 2 custom modules covering ICG ERP integration (read and write), custom checkout flows, theme overrides, PayU payment gateway integration, and automated AWS static content uploads
    • Built a bidirectional integration with ICG — a widely-used retail ERP in Colombia that served as the source of truth for products, inventory, and pricing — running daily sync jobs from ICG into Magento, and pushing new orders from Magento back into ICG to keep both systems aligned in near-real-time
    • Built an internal business intelligence tool in React + Python (Flask) + Microsoft SQL Server, providing executives and operations teams with daily/monthly views of best-selling products, purchase and sales movements, and trend graphs
    • Automated executive reports using Python + Pandas, processing daily sales and purchase data and delivering summaries directly to managers' inboxes — replacing manual spreadsheet work
    • Built a Vue.js student-housing landing page and lead-capture system for a sister business, with submissions automatically written to Google Sheets via the Drive API for the team to follow up on
    • Owned the entire AWS infrastructure: EC2 instances for application hosting, S3 for static assets and product imagery, CloudFront CDN for global delivery, plus deploy and maintenance — designing and running it solo from day one
    • Trained non-technical teams (operations, marketing, store managers) on using the platforms, providing day-to-day operational support as the only technical contact in the company
    • Magento 2
    • PHP
    • Vue.js
    • React
    • Python (Flask, Pandas)
    • Microsoft SQL Server
    • MySQL
    • AWS (EC2, S3, CloudFront)
    • PayU
    • Google Drive API
    • ICG ERP

  5. Web Developer

    Develoop Software (Spain) · Corporación ALBA · Proseguros ·

    Foundation years building e-commerce platforms and backend systems across Spain and Venezuela.

    ★ Developed and maintained e-commerce platforms using Prestashop, Magento (1 and 2), WooCommerce, and WordPress — including a Magento 2 storefront for a marine hardware company with 257k+ products online.

    Show details (2 highlights) ▾
    • Built backend systems with PHP (CodeIgniter), Node.js, and SQL databases; integrated with the Amazon Business API for product information uploads
    • Worked with Oracle PL/SQL, corporate intranets, and marketing automation for a financial-services client
    • Prestashop
    • Magento (1 and 2)
    • WooCommerce
    • WordPress
    • PHP (CodeIgniter)
    • Node.js
    • SQL databases
    • Amazon Business API
    • Oracle PL/SQL

Want the full picture?

Download my full resume for a detailed breakdown of every role, every stack, and every project.

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