Senior Full Stack Engineer | AI Engineer | Forward Deployed Engineer

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Senior Full Stack Engineer and Mobile Engineer with 16+ years building and modernizing enterprise systems across e-commerce, healthcare, insurance, fleet safety, and satellite geolocation. Deep expertise in Java/Spring Boot microservices, event-driven architectures (Kafka, RabbitMQ, Redis), and modern web and mobile frontends (React, Angular, Vue.js, React Native) on AWS. Currently embedded with a U.S. enterprise e-commerce client as order-lifecycle domain owner, resolving live production incidents across an ATG–SAP ecosystem. Practices AI-assisted, spec-driven engineering with Claude, Copilot, and agentic workflows — delivering faster without compromising quality.

Skills

Frontend & Mobile

React.jsAngularVue.js 3React NativeBackbone.jsReduxHTML5CSS3JavaScriptTypeScriptSwift/iOSKotlin

Backend Development

Java 8/11/17/21Spring BootSpring FrameworkJava EE / Jakarta EEKotlinGroovyPythonMicroservicesREST APIsLiquibaseFlywaySalesforce integrationsSAP integrationsOracle ATG CommerceHibernate

Messaging & Caching

Apache KafkaRabbitMQRedis

Search & Monitoring

OpenSearchFullStory

DevOps & CI/CD

DockerKubernetesTerraformJenkinsGitGitHub ActionsGitLabAzure DevOpsAntMavenGradleSpockSonarQube

Cloud & Infrastructure

AWS (S3, EC2, Aurora)AzureGCPIstioVaultSplunkDynatraceGrafana

Databases

PostgreSQLMicrosoft SQL ServerOracleMySQLNoSQL (Couchbase, MongoDB)

Platforms

LinuxmacOSWindows

Soft Skills

LeadershipCollaborationMentoringAdaptabilityCommunicationAgile deliveryOwnership

AI & Agentic Engineering

Anthropic Claude / Claude CodeSpec-Driven DevelopmentCLAUDE.mdAgent SkillsCustom SubagentsAgent TeamsMCPHooksPermission RulesContext Engineering

AI Tools & Integrations

PluginsCursorGitHub CopilotOpenAI (GPT)GitHubJiraConfluenceSlack

Languages

Spanish (Native)English (Professional working proficiency)

Experience

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  1. Remote Contractor — Confidential Enterprise E-Commerce Client (USA)

    • Own the order lifecycle domain (checkout, payments, gift cards, promotions, discounts, claims) of a B2B/B2C e-commerce platform for a leading U.S. retail organization, processing 1,000+ orders daily.
    • Orchestrate order-to-cash integrations across Oracle ATG Commerce, SAP, Apache Kafka, and Redis, connecting legacy Java 8 modules with modernized Java 21 services.
    • Act as first-line troubleshooter during live production incidents — with business customers on the line — tracing orders end-to-end (storefront, ATG, SAP) via OpenSearch, CloudWatch, ATG dynAdmin, FullStory session replay, and database analysis, and remediating stuck orders through state corrections, holds, and gift card/promotion adjustments.
    • Maintain the OneTrust privacy application across web and mobile devices, and deliver module-level improvements to the platform's mobile apps in React Native and native Swift/iOS, with additional Kotlin support and responsive web experiences.
    • Apply AI-assisted engineering (Claude, Copilot, Codex) with a spec-driven workflow — documented investigation specs that preserve context across sessions — accelerating incident analysis, log triage, and legacy ATG code exploration.
    • Coordinate order-domain changes with React, infrastructure, database, and SAP teams within a 100+ engineer organization, and build frontend features in Angular and React.js with GitHub-based CI/CD.
    JavaSpring BootOracle ATG CommerceSAPKafkaRedisReact NativeSwiftKotlinAngularReact.jsOpenSearchClaude Code

Education

  • Bachelor's Degree in Information Technologies and CommunicationUniversidad Latina de Costa Rica — San José, Costa Rica

Certifications

  • Claude Certified Architect Foundations (CCA-F) — in progress, exam scheduled Sep 2026Anthropic
  • Scrum Master Professional CertifiedCenfotec
  • Scrum Foundations CertifiedCenfotec
  • Agility SpecializationInstituto Tecnológico de Costa Rica (ITCR)
  • Microservices with Java and Spring BootLiteThinking
  • Web Development / React Native / React Web AppCenfotec
  • Course Update for Java EE 6Cenfotec
Senior Full Stack Engineer | AI Engineer | Forward Deployed Engineer · Manuel Herrera