Billy Martínez

BeCloud Consulting · SAP BTP Consultant

Jan 2025 — Sep 2026

Requirement refinement with a functional consultant; solution architecture, Fiori/UI5 UX, full-stack SAP delivery, automated testing, QA and design coordination, deployment, and platform troubleshooting.

Happ Rent · Full-Stack Developer

Oct 2023 — Sep 2024

As part of the team: Kotlin + Spring Boot 3 API (Spring Security/JWT, JPA, email), Vue 3 + Pinia frontend for leases, properties, brokers and KPIs, contract PDF generation and templates, Docker images published on AWS. Scrum/Kanban.

Confidential SAP solutions

Converted functional requirements into architecture and delivery across SAP BTP, Fiori/UI5, CAP/CDS, Work Zone, HANA, and Joule; introduced automated tests and a dedicated QA stage.

SAP CAP/Fiori reference (public proof page)

SAP BTP reference with CDS modeling, OData V4, Fiori Elements, XSUAA/HANA deployment design, and 12 CAP service tests covering role authorization, concurrent stock protection, and degraded external OData behavior; lint, production build, and CI pass. Evidence: billyflin.dev/proof/sap-cap-fiori-btp/

Grounded RAG public reference

Independent Next.js/TypeScript reference with evidence gating, safe refusals, validated citations, 12 automated tests, deterministic fixture evaluations, and an optional server-only OpenAI provider.

Confidential cloud platform

Recommended and aligned an AWS-to-Google-Cloud re-platform after evaluating cost and technical fit; implementation is in progress.

Clinipets

Designed a multi-tenant veterinary platform with scheduling, auditable clinical records, payments, secure attachments, notifications, web/mobile clients, and infrastructure.

UFRO Sustentable

Kotlin/Firebase Android project with QR and location flows, 83 JVM tests, 89.23% line coverage, and 77.88% branch coverage reported in the repository.