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$33 USD / hour
Flag of PHFlag of PH
quezon city,
$33 USD / hour
It's currently 1:32 PM here
Joined June 7, 2017
7 Recommendations

Valentino P.


4.9 (17 reviews)
4.9 (17 reviews)
$33 USD / hour
Flag of PHFlag of PH
quezon city,
$33 USD / hour
Jobs Completed
On Budget
On Time
Repeat Hire Rate

Full-Stack Cloud Microservices | Rust/Go/Kotlin

22 years systems architect / developer experience, with the last 5 years on scalable microservices architecture with Docker / Kubernetes. I bring a solid blend of non-freelancing and freelancing experience; once in my non-freelancing days I led a team that migrated a universal bank's 17-year-old COBOL / Oracle system to Groovy Grails / IBM DB2. I am also a Certified / Licensed Electronics and Communications Engineer in the Philippines (ECE License # xx875). I have interests in both software and hardware (rig building / overclocking), and IoT. Constantly evolving to innovate. My latest rage: Rust and Kotlin. Some of my core domains: - Banking - Fintech / financial services - Blockchains / cryptocurrencies - E-commerce - ERP / CRM - Telecoms software engineering (GSM Parlay X / OneAPI) I have worked on projects for Accenture, Huawei, Deutsche Bank, Morgan Stanley Asia-Pacific (Hong Kong), First e-Bank, Banco de Oro Universal Bank, UCPB Universal Bank, PDex (Philippine Dealing & Exchange Corp.), and Bureau of Treasury of the Philippines and GSIS (gov't. financial 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 patterns: Gateway, BFF ("Backends for Frontends") API-first development: Swagger / OpenAPI, NSwag Functional (FP), Functional Reactive DDD / CQRS Agile / Scrum / Kanban Microservices: Golang / gRPC + protobuf Oracle Helidon, Oracle GraalVM Microsoft Dapr, Project Tye IBM LoopBack 4, Moleculer JS (Node.js) Red Hat Quarkus Micronaut Eclipse MicroProfile / KumuluzEE Eclipse Vert.x Service mesh: Istio UI: ES6+ JavaScript / TypeScript Vue, Nuxt, Quasar Angular, React JSF Vaadin GSP (Groovy Server Pages) JavaFX ASP.NET, Razor Pages jQuery, AJAX Docker: Dockerfiles, Docker Compose, Docker Swarm, Docker cloud registries (Docker Hub, GCP Container Registry, Azure Container Registry, MicroK8s registry, etc), Google jib. 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, Testcontainers, Webtau, testify (Golang), DATA-DOG/go-sqlmock, xUnit/NUnit, Cypress, Jest, Spock, Spek, RestAssured. Other top skills: GraphQL Kotlin Scala, Play! Framework, Akka, Scalatags Groovy Grails Java EE / Jakarta EE, Spring Boot JHipster, CUBA Platform, ZK Framework .NET Core/C#, Envoy / Ocelot API Gateway, IdentityServer4, PowerShell NoSQL: Apache Cassandra, MongoDB, Elasticsearch, Redis, Firebase LDAP: OpenDJ, OpenLDAP, Active Directory SQL: (too many to mention) Blockchains: Bitcoin, Ethereum, IOTA, Stellar, Ardor / Nxt, Waves Platform, Hedera Hashgraph, Hyperledger, IPFS, BTFS, VeChain. Team: GitHub, GitLab, Bitbucket, Jira, Trello, Redmine, Mercurial.
Blockchain Developers

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Portfolio Items

My OSB workbench where I designed asynchronous (non-blocking) SOAP Web services workflows exposing SAP ERP services for a government financial institution. Full SOA with messaging (WebLogic messaging), callbacks, and durable request throttling.
SOA-enablement of SAP ERP with Oracle Service Bus (OSB)
Batch Jobs Administration Portal is a central admin console to schedule, start, and stop application-wide batch and background jobs. Made with Groovy/Grails, GSP, Grails GORM, Oracle 10g, jqWidgets, and Quartz Enterprise Scheduler.
Batch Admin Portal in Groovy/Grails/GSP and jqWidgets
A mobile backend project practising API-first development and API documentation with Swagger/OpenAPI using JHipster, Spring Boot, and Angular. Cryptocurrency API shown is Nxt, but later I added Bitcoin, Ethereum, and Stellar.
Mobile cryptocurrency wallet API with Swagger/OpenAPI
My certificate of completion for the course.
Online banking application with Angular 2 and Spring Boot


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Showing 1 - 5 out of 18 reviews
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$2,109.00 USD
Valentino did well and provided an application that performed AI tasks as we specified. However, his level of experience with more complicated AI and ML was not enough to be able to get us all the way where we need to be at this point.
Java Spring
Google Cloud Platform
Flag of US Patrick H. @hallp21100
3 months ago
$38.00 USD
Thanks for your work Valentino
User Avatar
Flag of ZA Philip H. @philiphaslam
7 months ago
$4,863.55 USD
I've worked with Valentino several times. He provides great work for the price.
Software Architecture
Software Development
User Avatar
Flag of US Brandon F. @Mewzikal
8 months ago
$2,062.19 USD
Valentino offers great work as usual
User Avatar
Flag of US Brandon F. @Mewzikal
10 months ago
$282.53 USD
We where looking for an Middleware for an existing protect with Golang. Valentino understood very fast our requirements and delivered an excellent, easy to read and good documented code. He is very professional and has excellent communication skills. We would definitely hire him again.
User Avatar
Flag of MX Michael H. @hasselbit
1 year ago


Java / Go E-commerce and Microservices Developer

Nekom / SHOPiMORE (Austria)
May 2018 - Dec 2018 (7 months, 1 day)
Multi-tenant, multi-channel e-commerce ERP+CRM system in Java EE (EJB3+) with Vaadin frontend and microservices in Go. The Go microservices are called via gRPC and protobuf by EJBs. Database in PostgreSQL and hosted in JBoss / WildFly.

Blockchain / Cryptocurrency Consultant

QuantaLoop Technologies (USA)
Aug 2017 - Dec 2018 (1 year, 4 months)
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

Lityus LLC (UK)
Jan 2017 - Jun 2017 (5 months, 1 day)
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 AWS.


Bachelor of Science in Electronics and Communications Engineering

University of Santo Tomas, Philippines 1993 - 1998
(5 years)


Certified / Licensed Electronics and Communications Engineer

Professional Regulation Commission, Republic of the Philippines
Board passer, November 1998 Licensure Examination


Huawei SDP / SAG Training Manual (2012)

Huawei Philippines, Inc.
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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