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Flag of Philippines Quezon City, Philippines
Member since June 7, 2017
4 Recommendations


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21 years architect / developer experience, with the last 3 years on scalable microservices architecture with Docker / Kubernetes. Certified Electronics and Communications Engineer (ECE License # xx875). Constantly evolving to innovate. My latest rage: Rust and Concurnas. Some of my core domains: banking, fintech, financial services, blockchains / cryptocurrencies, e-commerce. I have worked on projects for Accenture, Huawei, Deutsche Bank, Banco de Oro Universal Bank, UCPB Universal Bank, Morgan Stanley Asia-Pacific (Hong Kong), and Bureau of Treasury of the Philippines and GSIS (gov't. agencies), among others. Methodologies: Cloud microservices, cloud functions, serverless Clean code, TDD "The Twelve-Factor App": [login to view URL] ReactiveX ([login to view URL]): RxJava, RxGo, RxJS, RxGroovy, etc. API Gateway and BFF API patterns, API-first: Swagger / OpenAPI Functional (FP), Functional Reactive DDD / CQRS Agile / Scrum / Kanban Microservices: Golang / gRPC / protobuf Oracle Helidon, Oracle GraalVM Microsoft Dapr IBM LoopBack 4, Moleculer JS Micronaut Red Hat Quarkus Eclipse MicroProfile / KumuluzEE Open Microservice Spec (OMS) Docker: Dockerfiles, Docker Compose, Docker cloud registries (Docker Hub, Azure Container Registry, MicroK8s registry, etc.), Google jib, Spotify Docker (deprecated), Docker Swarm (parked). Kubernetes: AWS Kubernetes (EKS), GKE (GCP), AKS (Azure), Helm v3, kubectl, minikube, Canonical MicroK8s, Google Skaffold, Eclipse Che 7. Cloud: AWS, Microsoft Azure, Google Cloud Platform (GCP), GCP IoT Core, Heroku. TDD: JUnit 5, TestNG, Mockito, Spring Test, JBoss Arquillian, testify (Golang), DATA-DOG/go-sqlmock, xUnit / NUnit, Jest, Mocha, Karma, DBUnit, Spock, Spek, Geb, RestAssured. Other top skills: Vue, Nuxt, Quasar Kotlin, Eclipse Vert.x Scala, Play! Framework, Akka, Scalatags Groovy, Grails, GSP Java EE / Jakarta EE, Spring Boot JHipster, CUBA Platform, Vaadin .NET Core/C#, Razor Pages, Ocelot API Gateway, IdentityServer4, PowerShell ES6+ JavaScript/TypeScript, Node.js Angular, React NoSQL: Apache Cassandra, MongoDB, Elasticsearch, Redis, Firebase LDAP: OpenDJ, OpenLDAP, Active Directory SQL: (too many to mention) Blockchains: Bitcoin, Ethereum, Stellar, Ardor / Nxt / Ignis, Waves Platform, Hedera Hashgraph, Hyperledger, IPFS, BTFS, VeChain, Mobius. Team: GitHub, GitLab, Bitbucket, Jira, Trello, Redmine, Mercurial.
$35 USD/hr
12 reviews
  • 100%Jobs Completed
  • 40%On Budget
  • 40%On Time
  • 5%Repeat Hire Rate

Portfolio Items

Recent Reviews


Java/Go E-commerce and Microservices Developer

May 2018 - Dec 2018 (7 months)

Multi-tenant, multi-channel e-commerce ERP+CRM system in Java EE (EJB3+) with Vaadin frontend and microservices in Go, calling them from EJBs via gRPC and protobuf. Database in PostgreSQL and hosted in JBoss/WildFly.

Contributing Blockchain/Cryptocurrency Consultant

Aug 2017 - Dec 2018 (1 year)

DApps and smart contracts developer mainly concentrating on Ardor, Nxt, Stellar, Ethereum, IPFS, Mobius, and VeChain. Also provided research studies into DApp models and ICOs.

Full-stack Java E-commerce and Microservices Architect/Developer

Jan 2017 - Jun 2017 (5 months)

Multi-channel seller integration (eBay, Amazon, etc.) software-as-a-service (SaaS) on JHipster, Spring Microservices, JHipster Registry, Angular 2, Bootstrap, Metronic admin theme, Webpack, SASS, Gradle, Apache Cassandra, Docker, Docker Compose, Docker Swarm, Akka clusters, RancherOS, and Amazon Web Services.

Java Developer

Dec 2015 - Feb 2017 (1 year)

* Lead SCIM (System for Cross-domain Identity Management) Developer. * Shibboleth SAML 2.0 IdP upgrade from v2 to v3 - upgraded Gluu’s IdP to the latest v3 version with backward compatibility to v2. * Gluu Server migration from v0.1 to v2.4.2 - Developed the migration strategy and helped the client (Toshiba) upgrade libraries and create use case unit tests in OpenID Connect and SCIM. Wrote the Groovy script that migrated the OpenDJ LDAP delta schema and data.


Bachelor of Science in Electronics and Communications Engineering

1993 - 1998 (5 years)


Certified Electronics and Communications Engineer (1998)

Professional Regulation Commission, Republic of the Philippines

Board passer, November 1998 Licensure Examination


Huawei SDP/SAG Training Manual (2012)

Manual I wrote for the two-week training where I was also the instructor, on Huawei's Service Delivery Platform (SDP) / Service Access Gateway (SAG), a Java EE and C++ OSGi-based framework implementing GSM (Global System for Mobile) Parlay X / OneAPI, for the biggest telco provider in the Philippines.


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