Backend • DevOps • Cloud

Hi, I'm Rossario Catherine Elfrida.

Engineer with strong foundation in backend development and cloud computing. Passionate about building scalable services and shipping real-world impact.

20+ repos 4+ featured projects FGA • Bangkit • SINTA 5
Node.js Golang Express PostgreSQL GCP Docker

Featured Projects

Case-study style cards inspired by EkiZR V5 layout. Each card highlights the problem, your role, tech stack, and outcomes.

Final Year Project • 2023–2024

JimbWash — Laundry Marketplace

Responsive mobile-web connecting users to 10+ laundry providers in Jimbaran with location-based discovery and price comparison. Published in SPEKTRUM (SINTA 5).

Node.jsExpressPrismaMySQL
Capstone • 2022

AQIMonitor — Air Quality & Weather Alerts

Android app with Node.js backend for AQI and weather warnings. Top 2 of 17+ teams (Indosat Ooredoo Hutchison initiative).

Node.jsExpressScraping
Bootcamp • 2024

MyGram API — Scalable Photo-sharing API

Secure REST API with auth, middleware, and unit tests; built with Go and PostgreSQL following microservice-ready patterns.

GolangGORMPostgreSQL
Bootcamp • 2023

Basic Banking System — Transactions API

Backend system with authentication, transfers, and testing. Deployed & documented with focus on correctness and resilience.

Node.jsExpressPrismaPostgreSQL

Experience

DevOps Engineer Intern — PT XL Axiata Tbk

Aug 2022 – Dec 2022

Provisioned 10+ cloud infrastructures with IaC; automated deployments for 4 projects via CI/CD; supported migration of 10+ on‑prem systems to cloud; cost analysis across 100+ cloud projects.

Software Engineer Apprentice — Fishku Indonesia

Jun 2022 – Apr 2023

Bangkit standout project awarded $10K (Google x Kemendikbud). Built backends with full GCP integration (Cloud Run, Cloud SQL, Secret Manager). 30% faster response times; 20% DB optimization.

Cloud Computing Participant — Bangkit Academy

Feb 2022 – Jul 2022

Mastered web dev & GCP fundamentals; 26 Google Cloud Skill Boost badges; collaborated on ML + cloud capstone.

Skills

JavaScriptGolangJavaC++C# Node.jsExpress.jsHapiPrisma ORM PostgreSQLMySQL GCPAWS DockerJenkinsGitLab CI/CDAnsible GrafanaLinuxGit

Education & Certifications

Udayana University — B.Eng, Electrical (Computer)

Aug 2019 – Aug 2024 • GPA 3.80/4.00 • Honors (Sangat Memuaskan)

FGA 2023 — Cloud Automation with Ansible

RH294: Inventory, playbooks, variables & facts, roles/collections, troubleshooting, Linux automation.

FGA 2023 — Backend Engineering

Node.js, Express.js, Prisma, PostgreSQL, testing, security & authentication, WebSocket, mailer, deployment.

FGA 2024 — Scalable Web Service with Golang

Go fundamentals, concurrency, middleware, unit testing (Testify), SQL & NoSQL integration.

Bangkit Academy 2022 — Cloud Computing

Web dev & GCP fundamentals; 26 Google Cloud badges; ML + Cloud capstone.

Contact

Email: roselfridaa@gmail.com

Location: Bekasi, Jawa Barat