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Umar Sabirin

@umarsabirin

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I build secure cloud platforms, CI/CD systems, and reliable distributed infrastructure.

Indonesia

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What I'm looking for

I'm looking to build secure, reliable cloud and platform infrastructure where I can improve CI/CD, observability, incident response, and distributed-system performance.

I'm building DevOps infrastructure at Apple Developer Institute for DevOps × S-Quantum Engine, where I've cut Jenkins pipeline stage time by about 83% and integrated cost, security, and AI-driven remediation into delivery workflows.

Previously at Maxcloud, I built a Go engine handling 19,400+ concurrent gRPC/SSE streams and a QEMU/QMP orchestrator that reduced VM boot time to 2 seconds. I also improved payment availability through multi-gateway failover and delivered self-service load balancing that reduced network provisioning by about 40%.

Across freelance and Fairtech work, I've built microservices, resilient APIs, multi-tenant platforms, search, messaging, and regional commerce integrations using Go, Java, PHP, cloud infrastructure, and observability tooling.

Experience

Work history, roles, and key accomplishments

Current

DevOps Engineer

Current

Apple Developer Institute for DevOps × S-Quantum Engine

Mar 2026 - Present (5 months)

Built infrastructure CI/CD in Jenkins for IaC (Terraform) and CaC (Ansible), with lint, test, and security gates. Reduced pipeline stage time ~83% via parallelization, dependency caching, and selective re-runs.

Jenkins Terraform Ansible Packer Trivy Prometheus Grafana ELK AI CI CD Observability

Platform Engineer

Maxcloud (PT Awan Data Indonesia)

Jul 2025 - Mar 2026 (8 months)

Built a Go engine multiplexing 19,400+ concurrent gRPC/SSE streams from 194 agents at millisecond latency. Built a custom Go orchestrator over QEMU/QMP, cutting VM boot to 2s (~300% faster than Proxmox).

Go gRPC SSE QEMU HAProxy Nftables Testing CI CD

Software Engineer

Freelance / Self-Employed

Mar 2023 - Jun 2025 (2 years 3 months)

Benchmarked 5 concurrency strategies in Spring Boot; Kafka sustained 2,683 req/s, ~3 orders over the sync baseline. Architected microservices (API, notifications, real-time chat) over RabbitMQ and WebSocket, with Elasticsearch search and ELK audit logging.

Spring Boot Kafka RabbitMQ WebSockets Elasticsearch ELK JWT Redis Microservices

Software Developer

Fairtech Pte Ltd

Jun 2021 - Feb 2023 (1 year 8 months)

Improved multi-tenant query performance ~50% through targeted indexing and SQL refactoring on high-traffic tables. Built localized business logic across multiple Southeast Asian country sites for a global imaging brand.

SQL Indexing Elasticsearch Caching Retries Error Handling

Software Developer Intern

Fairtech Pte Ltd

Mar 2021 - Jun 2021 (3 months)

Improved the content-management workflow with a custom drag-and-drop component editor. Hardened application security with aligned client-side and server-side validation.

Drag And Drop Validation Database Schema Design

Education

Degrees, certifications, and relevant coursework

Hasanuddin University

Bachelor of Information Systems, Information Systems

2020 - 2025

Grade: 3.82 / 4.00

Activities and societies: Teaching Assistant for Web Programming, Aug-Dec 2022

Pursued a Bachelor of Information Systems, graduating with a GPA of 3.82/4.00. Thesis focused on a web-based student management information system using design thinking.

Independent Study – Metaverse Asset Creation & Commercialization (MSIB / Kampus Merdeka)

Independent Study, Metaverse Asset Creation

2023 - 2023

Led a team in creating 3D digital assets, a metaverse environment, and a Roblox house-design simulator using Lua, in collaboration with CIAS and WIR Group.