Backend systems designed for reliability, scale, and messy real-world data.

I turn complex backend and data challenges into stable, maintainable systems.

Juandreas Ezarfelix

My work focuses on backend engineering, data pipelines, and system design that can hold up under real operational use.

Over the last few years, I have worked on backend services, ETL workflows, banking integrations, microservice migration, and infrastructure patterns that connect older platforms with newer service-based architectures.

Experience

BPK PENABUR Jakarta

Full Stack Developer

Sep 2022 - May 2026 — Worked on backend systems and data workflows supporting 35,000+ students across 79 schools, including ETL pipeline automation, SNAP payment migration, microservice migration efforts, and zero-downtime frontend deployment patterns.

Education

Binus University

Computer Science & Mathematics (Double Major)

GPA 3.62 / 4.00 — Streamlined Artificial Intelligence

The Arsenal

Core Backend
Python (FastAPI/Flask/Scripts)PHP (Legacy/CI4/Laravel)Node.js (Express).NET CoreJoomla (CMS)
Data & Storage
PostgreSQLMySQL / MariaDBSQL ServerSupabaseFirebaseRedisPandasAirflowPySparkCDCDebeziumDatabricksBigQuery
Infrastructure
AWS (Lambda/CloudFront/S3/EC2)DockerNginxLinux SystemdCI/CDShared Hosting / VPS
Testing
k6PostmanBruno
AI & Retrieval
PineconeLangChainVertex AI
Frontend
NuxtVue 3ReactAstroTailwindjQuery