Umar Hadi Siswanto

DevOps Engineer

Sleman, Special Region of Yogyakarta, Indonesia

UHS

About

Platform and infrastructure engineer who redesigns systems when they become slow, expensive, or hard to operate. I own infrastructure and delivery decisions end-to-end, balancing performance, cost, and reliability across cloud, serverless, and bare metal environments. My work focuses on simplifying operations, accelerating delivery, and giving teams platforms they can trust to scale. Hands-on by nature, pragmatic by choice. I believe good infrastructure should be boring to operate, cheap to run, and invisible to product teams.

Work Experience

Volantis Technology
On site
Full-time

Jan 2026 - Present

DevOps Engineer

Currently onboarding and establishing role responsibilities.
Key impact:

HRMLabs Pte Ltd
Remote
Freelance

Nov 2025 - Dec 2025

DevOps Engineer

Led and owned company-wide infrastructure strategy and operations, reporting directly to the CEO, with responsibility for cost control, reliability, security, and long-term sustainability of the platform.
Key impact:
  • Drove the migration from AWS to bare metal infrastructure, taking full ownership of planning, execution, and operational stability to significantly reduce recurring cloud costs.
  • Migrated email services from Google Workspace to a self-hosted mail server, balancing cost efficiency with security and operational reliability.
  • Designed and implemented a custom monitoring stack using Prometheus and Grafana to provide full visibility into bare metal infrastructure health and performance.
  • Established routine backup systems for databases and file servers, improving data resilience and disaster recovery readiness.
  • Optimized internal network architecture to improve service-to-service communication and overall system access speed.
  • Owned infrastructure security posture by conducting regular security audits and ensuring all servers and applications were consistently patched and up to date.
  • Built automation scripts to streamline deployment, maintenance, and operational workflows, reducing manual intervention and operational risk.
  • Migrated CI/CD pipelines from Jenkins to GitHub Actions to simplify maintenance and reduce infrastructure and tooling costs.

Paketur
Remote
Full-time

Jun 2025 - Dec 2025

DevOps Engineer

Owned the platform, infrastructure, and delivery pipelines across web, backend, and mobile products, acting as the primary decision-maker for system architecture, CI/CD standards, and operational practices.
Key impact:
  • Defined and executed infrastructure strategy on AWS, including migrating production workloads from EC2-based deployments to a serverless architecture using SST to improve scalability and reduce operational complexity.
  • Established platform-wide CI/CD standards by designing self-hosted GitHub Actions runners, enforcing dependency vulnerability checks, and unifying release workflows across frontend, backend, and mobile teams.
  • Built and operated a containerized Laravel backend platform, including PostgreSQL enhancements with pgvector to support internal tools and future feature development.
  • Took ownership of the mobile delivery pipeline by leading the migration from Create React Native App to Expo and implementing fully automated build and release processes for both App Store and Play Store.
  • Optimized cloud cost and security posture by minimizing public IP exposure and designing private inter-VPC networking to support secure internal service communication.
  • Implemented centralized monitoring and alerting using AWS CloudWatch, enabling early detection of production issues across all services.
  • Created and maintained comprehensive platform documentation covering infrastructure setup, CI/CD pipelines, and deployment practices, ensuring long-term maintainability and faster onboarding.

Zenvoye
Remote
Freelance

Mar 2025 - Present

Technical Director

Founded and lead Zenvoye, a software house delivering end-to-end product development and platform engineering, while remaining hands-on in critical technical decisions and execution.
Role & scope:
  • Defined technical standards, architecture patterns, and delivery processes for client projects across web, backend, mobile, and infrastructure.
  • Acted as principal engineer on early and high-impact projects, taking ownership of system design, scalability, and deployment strategy.
  • Oversaw and executed full project lifecycles, from requirement translation and architecture design to deployment and post-launch operations.
  • Established CI/CD, deployment, and operational best practices to ensure consistent delivery quality across client engagements.
  • Balanced client needs, delivery timelines, and technical sustainability as both business owner and technical decision-maker.

PT. Altech Omega Andalan
On-site
Full-time

Oct 2023 - Jan 2026

DevOps Engineer

Owned and operated platform infrastructure and delivery pipelines for multiple high-traffic products across food & beverage, global marketplace, and e-commerce domains.
Key impact across projects:
SweetEscape (Global platform, 100+ countries):
  • Built internal tooling to accelerate sprint planning by standardizing story point weighting and operational request intake.
  • Designed an organization-wide operational workflow to eliminate fragmented request handling and improve reliability and accountability across teams.
  • Led company-wide migration from Jenkins to GitHub Actions, reducing CI/CD maintenance overhead and infrastructure cost.
  • Optimized AWS cost by migrating suitable workloads to Spot Instances, cleaning up unused services, and running large-scale S3 raw photo cleanup jobs.
  • Reduced public IP usage by designing a mesh VPN network between services.
  • Built and maintained custom macOS self-hosted runners (Mac Mini) for iOS and Android builds.
  • Set up Android artifact repositories and Swift Package dependency management to stabilize mobile build pipelines.
  • Strengthened security posture by implementing DefectDojo for code security assessment and integrating SonarQube for static analysis.
  • Improved monitoring and observability across services.
YAY! Group (Multi-brand F&B, 100+ outlets nationwide):
  • Designed AWS infrastructure from scratch to support multiple brands and high-volume online delivery traffic.
  • Established repositories, CI/CD pipelines, and deployment workflows to support rapid feature delivery across brands.
Wagginton (E-commerce & same-day delivery):
  • Migrated source control from Bitbucket to GitHub, including CI/CD pipeline migration.
  • Initialized SonarQube for code quality governance and performed OS-level security patching.

PT. Genial Digital Nusantara
Remote
Part-time

May 2023 - May 2025

DevOps/SRE

Led a platform optimization initiative to improve system performance and cost efficiency by redesigning the deployment and delivery approach.
Key impact:
  • Initiated and executed a migration from a static infrastructure model to an on-demand platform architecture, resulting in ~70% performance improvement and ~50% reduction in infrastructure cost.
  • Reduced operational overhead by adopting an infrastructure model that automatically scaled with demand, eliminating unnecessary always-on resources.
  • Established a standardized CI/CD pipeline to improve deployment reliability and reduce manual release effort.
  • Built and launched the company landing page to support product presence and early user acquisition.

Self-Employed
Freelance
Remote

2018 - Present

Full Stack Developer

Conceptualized and constructed bespoke websites and mobile applications, ensuring high-performance solutions for a diverse client base. I leveraged full-stack development skills to deliver end-to-end services, from database management to front-end execution. Utilized a suite of technologies to enhance project deliverables: PHP, MySQL, JavaScript, Kotlin, React, Next.js, React Native, Docker, Fly.io, Heroku, AWS, Github Actions.

Mahardika Komputer
Internship

2016 - 2016

Technical Support

Provided comprehensive technical support, resolving issues related to computer hardware and software, enhancing customer satisfaction and service efficiency.

SMK Negeri 4 Penajam Paser Utara
Volunteer

2014 - 2015

Web Developer

Collaborated on the design and launch of an innovative Online School Semester Test System, marking a significant advancement in the digitalization of semester exams. This project was realized through the application of foundational web technologies such as PHP, MySQL, JavaScript, HTML, CSS.

Education

Universitas Teknologi Yogyakarta(view transcript)

2018 - 2023
Bachelor's Degree in Computer Science

SMK Negeri 4 Penajam Paser Utara

2014 - 2017
Vocational High School on Computer Network Engineering

Skills

GNU/Linux
Docker
Kubernetes
Amazon Web Services (AWS)
Google Cloud Platform (GCP)
GitHub Actions
Jenkins
Prometheus
Grafana
Terraform
JavaScript
TypeScript
Go
PHP
React/Next.js

Certifications

MikroTik Certified Network Associate (MTCNA)

2019
MikroTik

Projects

YAY! Group

Multi-brand Food & Beverage company with 7+ brands including Sushi Yay!, Ramen Yuk!, Murame, Dimsum Yay!, Bento Yay!, and Nasi Kulit Pas Kantong. Managing infrastructure for online delivery platforms serving customers across Indonesia with 100+ outlets nationwide.

Company Project
AWS
GitHub Actions
React
Node.js

SweetEscape

SweetEscape is a global AI-driven platform connecting clients with local professional photographers in over 500 cities across 100 countries.

Company Project
AWS
GitHub Actions
Jenkins
Ruby on Rails

Wagginton

Wagginton is a pet store app offering trusted brands for food and supplies, 24/7 customer service, and same-day delivery, making it easy to spoil your pet.

Company Project
AWS
Bitbucket Pipelines
GitHub Actions
Ruby on Rails
React Native

Administrating Pixelfed

Administrating Pixelfed fediverse server

Side Project
Docker
Fly.io
Postgres
PHP/Laravel

Administrating Mastodon

Administrating Mastodon fediverse server. Deployed on Fly.io

Side Project
Docker
Fly.io
Postgres
Ruby on Rails

Genilogi Landing

A landing page

Company Project
Next.js
Google Sheets API

Bank Server API

A simple bank service

Side Project
Go
gRPC
Docker
Kubernetes
Postgres

Spotify Canvas

A dynamically updated audio video canvas of my recently played Spotify music. Built with Svelte

Side Project
Svelte
Spotify API
Protobuf

Online School Semester Test

A successful collaborative project with my teacher during high school, used for online semester exams.

Volunteer
PHP
JQuery
MySQL