Hector Olea - Full-Stack Developer

Hector Olea

Full-Stack Developer

Full-Stack Developer with 12+ years of experience designing, modernizing, and scaling enterprise applications. Specialized in Java, Spring Boot, and microservices, with a strong focus on clean architecture, automated testing, and event-driven systems using Kafka. I pair solid engineering practices with AI-assisted development — Claude Code, GitHub Copilot, and MCP integrations — to ship reliable, maintainable software faster.

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Tech stack

Languages

Java TypeScript JavaScript Python

Frontend

React Angular Tailwind CSS Bootstrap Redux Cypress

Backend

Spring Boot Node.js Spring Cloud JUnit

Data

Kafka PostgreSQL MongoDB GraphQL Oracle

DevOps & Tools

AWS Docker Terraform Git Kubernetes Jenkins Maven Gradle

AI Tools

Claude Code GitHub Copilot MCP

Work experience

Full-Stack Developer

Tata Consultancy Services (at USAA)

Current

  • Remediating security vulnerabilities across Java and React applications, hardening a large-scale financial platform on AWS.
  • Refactoring legacy services and adding Cypress regression suites to protect critical user flows.
  • Automating infrastructure and delivery workflows with Terraform, GitLab CI, and Python.

Full-Stack Developer

Capgemini (at MetLife)

  • Refactored 30% of an insurance platform's Angular and Java microservices codebase to align with Spring Boot best practices.
  • Raised test coverage from 0% to 20% with JUnit and Mockito, improving system reliability.

Software Engineer

IBM (at Dun & Bradstreet)

  • Kept a financial analytics platform stable and performant by resolving production incidents and optimizing workflows.
  • Reduced incident response times through structured incident management with ServiceNow.

Full-Stack Developer

IBM (at Discover)

  • Built and enhanced Java microservices for a banking platform, integrating customer data via SSN and expanding case and product management capabilities.
  • Introduced the first automated tests on legacy services, improving maintainability.

Full-Stack Developer

Softtek (at Walmart)

  • Built and maintained 15+ Spring Boot and Node.js microservices in a high-scale retail environment.
  • Migrated services to Walmart’s Cloud Native platform and Kafka, improving scalability and reducing deployment complexity.
  • Modernized Spring Boot applications, Docker images, and project dependencies, strengthening security and stability.
  • Automated support tasks with Bash and Python, improving operational efficiency.

Site Reliability Engineer

Softtek (at Southwest Airlines)

  • Automated operational workflows for the airline, cutting manual effort and improving efficiency.
  • Built monitoring and incident-handling automations with Python, Bash, and REST APIs integrated with ServiceNow.

Java Web Developer

Softtek (at General Electric)

  • Maintained an invoicing system processing transactions from FTP text files, ensuring reliable data integration.
  • Improved Oracle database performance through SQL/PLSQL tuning and automated bulk data loading.

Java Web Developer

INEGI

  • Maintained and supported the SIMBAD census database system, ensuring data accuracy and stable performance.