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


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20 years full-stack experience, with 17 years in a corporate setting mostly with universal banks, government, and global financial companies such as Deutsche Bank, SAP Ariba, and Morgan Stanley. Top skills: - Java EE, Spring Boot - Groovy/Grails, Kotlin - Go/Golang - .NET Core/C# - ES6+ JavaScript/TypeScript, Node.js - Docker, Kubernetes - Blockchains, Cryptocurrencies, Smart Contracts, DApps - NoSQL (Apache Cassandra, MongoDB, Elasticsearch, Redis, Firebase) - LDAP (OpenDJ, OpenLDAP, Active Directory) - SQL Other than the banking and financial domain, I have also developed blockchain/cryptocurrency, e-commerce, e-procurement, SaaS, OSGi, ERP/CRM, supply chain, portals, and IoT systems. Some of my methodologies: Clean code/architecture, cloud microservices, "The Twelve-Factor App" ( [login to view URL] ), serverless, ReactiveX, BFF Pattern, API-first (Swagger/OpenAPI), Agile, TDD. Skills highlights: - Core banking (CA/SA) integration, SWIFT financial network (i.e., ISO 9362), global import/export Trade Finance Letter of Credit (LC), KYC, AML, ETL, EDI, data warehousing, accounting - AWS, Microsoft Azure, Google Cloud Platform, Google Cloud IoT Core, Heroku - AWS Lambda, Azure Functions - Nuxt/Quasar/Vue, React/Redux, Angular, Svelte - LoopBack v4, Moleculer JS, Meteor, Express JS - Hyperledger, Ethereum, Stellar, Ardor/Nxt, Bitcoin Core, Litecoin Core, IPFS, BTFS, Sia - Solidity, ERC20 / ERCxx / ERCxxx, Truffle Framework, OpenZeppelin, Infura, ganache, Geth, Parity, web3j / [login to view URL], Metamask - Hyperledger Go chaincode, Ardor Lightweight Smart Contracts, Stellar Smart Contracts (SSC) - Apache Kafka, RabbitMQ, AMQP, MQTT, JMS, Oracle WebLogic messaging, TIBCO E4JMS - gRPC, protobuf, [login to view URL] microservices framework, Go CDK, Go Buffalo, KrakenD - JHipster, CUBA Platform, Vaadin - GraalVM, Vert.x, RxJava 2 - Quarkus, Micronaut - Hibernate, Spring Data, MyBatis, EclipseLink, Micronaut Data - Oracle WebLogic, Oracle Service Bus (OSB), JBoss/WildFly, Glassfish, Apache Tomcat, Jetty, Netty, Undertow - C#, ASP.NET MVC Core, Entity Framework Core, Microsoft SQL Server Core, LINQ - Razor Pages, Ocelot API Gateway, IdentityServer4 - JUnit (including JUnit 5), TestNG, Mockito, Arquillian, Spock, Geb, Spek - testify, DATA-DOG/go-sqlmock, xUnit, NUnit - GitHub, GitLab, Bitbucket, Mercurial, Trello, Redmine - Jira, Scrum, Kanban
$40 USD/hr
11 reviews
  • 100%Jobs Completed
  • 97%On Budget
  • 97%On Time
  • 6%Repeat Hire Rate


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 I also conducted on Huawei's Service Delivery Platform (SDP) / Service Access Gateway (SAG), a Java 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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