Manuel Herrera Mesén
Senior Full-Stack Engineer | AI Engineer | Forward Deployed Engineer
- manutech@manu506.com
- linkedin.com/in/manuel-herrera-55730039
- Remote · Costa Rica
Senior Full-Stack Engineer with 16+ years of experience delivering enterprise applications across e-commerce, fleet safety, healthcare, and insurance. Specializes in Java, Spring Boot, React, Angular, microservices, and event-driven integration. Builds AI-enabled application and service capabilities using Claude/OpenAI APIs, AI agents, RAG, and MCP, while applying AI-assisted and spec-driven workflows to engineering and production support. Works closely with business stakeholders and cross-functional teams to solve complex integration and operational problems.
Skills
Backend Development
Java 8/11/17/21Spring BootSpring FrameworkJava EE / Jakarta EEKotlinGroovyPythonMicroservicesREST APIsLiquibaseFlywaySAP integrationsSalesforce (Apex, SOQL, REST/Bulk API, Flows)Oracle ATG CommerceHibernate
Messaging & Caching
Apache KafkaRabbitMQRedis
Search & Monitoring
OpenSearchFullStory
Frontend & Mobile
React.jsAngularVue.js 3React NativeBackbone.jsReduxHTML5CSS3JavaScriptTypeScriptSwift/iOSKotlin
DevOps & CI/CD
DockerKubernetesTerraformJenkinsGitGitHub ActionsGitLabAzure DevOpsAntMavenGradleSpockSonarQube
Cloud & Infrastructure
AWS (S3, EC2, Aurora)AzureGCPIstioVaultSplunkDynatraceGrafana
Databases
PostgreSQLMicrosoft SQL ServerOracleMySQL
AI Engineering
Claude APIOpenAI APIAI AgentsAgentic WorkflowsRetrieval-Augmented Generation (RAG)Model Context Protocol (MCP)Claude CodeGitHub CopilotCursorCodexSpec-Driven Development
Languages
Spanish (Native)English (Professional working proficiency)
Experience
Lakeshore Learning
- Own the checkout-to-order lifecycle for a B2B/B2C retail platform processing 1,000+ orders daily, spanning payments, promotions, gift cards, and claims.
- Integrate Oracle ATG Commerce and SAP with Java 8/21 services, Kafka, and Redis across order-to-cash workflows.
- Partner with business stakeholders during production incidents; trace failures across storefront, ATG, SAP, CloudWatch, OpenSearch, FullStory, and databases to coordinate remediation.
- Maintain OneTrust privacy integrations and contribute to React Native, Swift/iOS, Kotlin, React, and Angular applications.
- Use Claude Code, Codex, and GitHub Copilot for spec-driven investigation, legacy code analysis, automated testing, and incident triage.
- Coordinate delivery across frontend, infrastructure, database, and SAP teams in a 100+ engineer organization.
- Develop Java/Spring Boot integrations with Salesforce and extend customer-service workflows with Apex, SOQL, and Flows.
- Design and integrate Claude and OpenAI API capabilities into enterprise e-commerce services, delivering AI-powered application functionality and automating previously manual workflows.
- Reduced production incident investigation time by 30% through AI-assisted log analysis, automated diagnostics, and spec-driven workflows across Oracle ATG, SAP, and Java services.
- Implement RAG using e-commerce domain information to support context-grounded AI functionality; contribute to improvements in delivery speed, code quality, scalability, and operating costs.
JavaSpring BootOracle ATG CommerceSAPKafkaRedisSalesforceApexSOQLReact NativeSwiftKotlinReact.jsAngularOpenSearchCloudWatchFullStoryOneTrustClaude APIOpenAI APIRAGClaude CodeCodexGitHub Copilot
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 October 19, 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