Open to opportunities

Juan Zambrano

@juanzambrano

Message

Senior full-stack engineer modernizing platforms with secure microservices and AI-assisted SDLC.

Mexico

Message

What I'm looking for

I’m looking for a senior full-stack role where I modernize platforms to microservices, lead secure CI/CD with mandatory security gates, and use AI-assisted development to deliver reliable end-to-end features.

I’m a Senior Full-Stack Engineer with 13+ years delivering end-to-end solutions across backend services, REST APIs, and modern React frontends. My core strength is platform modernization—migrating monolithic architectures to microservices on Azure—while keeping delivery reliable and secure.

At Hexaware Technologies, I centralize “security-grade authorization services” across distributed microservices using ASP.NET Core middleware and claims-based auth, reducing the security incident surface for 5+ backend services. I also cut release cycle time by automating DEV/QA/UAT deployments with Azure DevOps CI/CD pipelines, enforcing security gates before every merge with Mend SCA and Checkmarx.

I’m hands-on with AI-assisted development across the full SDLC: I use Claude Code and GitHub Copilot for architecture options, code generation, automated test creation, AI-assisted PR reviews, and documentation—then validate outputs to maintain production-grade quality. I’ve delivered impactful modernization outcomes before too, including decomposing a 5-year-old ASP.NET MVC monolith into independently deployable microservices, reducing environment provisioning time to minutes with Docker, and winning an Innovation & Development Award (2019) for automating payroll synchronization.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack .NET Developer

Current

Hexaware Technologies

Apr 2025 - Present (1 year 2 months)

Centralized Authorization Services across 5+ distributed microservices using ASP.NET Core middleware, reducing the security incident surface area. Automated DEV/QA/UAT deployments in Azure DevOps CI/CD with Mend SCA and Checkmarx security gates and improved SQL Server performance by eliminating N+1 patterns and missing indexes.

C#ASP.NET Core Claims Based Authorization Azure DevOps Checkmarx Azure SQL Server

Full-Stack Developer

Apex Systems

Jan 2024 - Apr 2025 (1 year 3 months)

Delivered full-stack features across React and .NET for a distributed team, maintaining zero broken-build incidents via strict branching strategy and PR reviews. Refactored legacy .NET services to Async/Await for higher throughput, reduced manual cross-system data-sync effort ~80% with n8n webhooks, and increased velocity using GitHub Copilot with AI review validation against team standards.

React Vue .NET Core PostgreSQL SQL Server N8n Webhooks Async Await GitHub Co Pilot

Full-Stack Developer

DaCodes

Jan 2022 - Jan 2024 (2 years)

Shipped production REST APIs with NestJS using dependency injection and microservices architecture supporting 3 concurrent client products. Built React frontends with Tailwind CSS, integrated Stripe payment webhooks, and achieved 0 payment-flow regressions over 12 months with Jest and Cypress; standardized Docker to ensure local/production parity.

NestJS React Vue Tailwind Webhooks Jest Cypress Docker PostgreSQL Microservices

Software Architect (Full Stack)

Grupo Cosmic

Jul 2017 - Jun 2021 (3 years 11 months)

Modernized a 5-year-old ASP.NET MVC monolith into independently deployable microservices, reducing deployment risk and enabling parallel development. Designed and optimized SQL Server product catalog and ERP data models for high-volume transactions, cut environment provisioning from days to minutes with Docker, and automated payroll synchronization with Oracle Cloud to eliminate a 2-day manual pro

ASP.NET MVC SQL Server Microservices Docker Data Modeling Oracle Cloud REST APIs