Available for Freelance

Haziq
Hafizuddin

Software Engineer · SRE · DevOps

10+ years shipping production systems across Southeast Asia. I build reliable backends, tame cloud infrastructure, and set up the pipelines that keep everything running at 3am.

Let's Work Together View Experience
// quick stats
10+
Years Experience
7+
Companies
3
Freelance Roles
∞
Bugs Squashed
Based in Kuala Lumpur, Malaysia · Remote-friendly
// about me

Who I Am

// contact info

📍
Location
Kuala Lumpur, Malaysia
📧
📱
Phone / WhatsApp
+60 1738 03045
🌐
Remote
Yes — open to global clients
Languages
🇬🇧 English 🇨🇳 Mandarin 🇲🇾 Malay

Engineer by trade,
problem solver by nature.

I'm a Lead Software Engineer with over 10 years of experience building and scaling production systems across Southeast Asia — at companies including AirAsia, Fave, and General Assembly.

My sweet spot is the intersection of backend engineering and infrastructure — shipping features fast while keeping systems observable, reliable, and easy to operate. I've led teams of 10+ engineers, run on-call rotations, designed canary deployments, and replaced legacy pipelines with modern tooling.

As a freelancer, I work best with teams that need someone who can hit the ground running — whether that's building a new Rails API, wiring up a CI/CD pipeline, tightening up AWS infrastructure, or helping a team graduate from "it works on my machine" to a proper DevOps culture.

I've mentored at Rails Girls KL (twice), contributed to ISO certification readiness, and I'm a quiet advocate for boring, reliable software.

// what i do

Freelance Services

Available for contracts, retainers, and project-based engagements.

⚙️
Software Engineering
Full-stack feature development from API design to frontend delivery. I build maintainable, well-tested systems — and I'll leave the codebase better than I found it.
Ruby on Rails Django FastAPI Flask ReactJS NuxtJS REST APIs PostgreSQL
🔭
Site Reliability Engineering
I'll help your systems stay up. Observability setup, on-call process design, incident response runbooks, performance profiling, and database optimisation.
Datadog PostgreSQL Replicas On-call Processes Canary Deployments Redis Sidekiq
🚀
DevOps & Infrastructure
Cloud infra setup, CI/CD pipelines, container orchestration, and infrastructure-as-code. I've managed AWS and GCP at scale across multiple products.
AWS GCP Docker Kubernetes Terraform Ansible Kamal CI/CD
// tech stack

Skills & Technologies

Backend
Ruby on Rails Django FastAPI Flask Python RESTful APIs Sidekiq Redis PostgreSQL TDD / RSpec
Frontend
ReactJS NuxtJS JavaScript Tailwind CSS HTML5 / CSS3 Redux React Native SASS Bootstrap
Cloud & DevOps
AWS GCP Docker Kubernetes Terraform Ansible Kamal Heroku CI/CD IAC
Practices & Tools
Datadog Agile / Scrum Test-Driven Dev Code Review On-Call / Incident Mgmt System Architecture Canary Deployments Observability ISO Compliance
// work history

Experience

10+ years across startups, scale-ups, and enterprise tech in Southeast Asia.

01
Head of Unit, Software Engineer
Oct 2024 – Present
Bateriku (M) Sdn Bhd
Led and scaled an engineering organisation of 10+ engineers across backend, frontend, QA, and design.
  • Restructured delivery with cross-functional squads, improving sprint predictability and requirement clarity.
  • Executed a canary deployment strategy to safely upgrade Ruby 2.5 → 3.1.7 across live production.
  • Resolved a system-wide DB bottleneck by introducing a PostgreSQL read replica for high-traffic routes.
  • Introduced Ansible for AWS IAM management, supporting ISO certification readiness.
  • Replaced Capistrano with Kamal, simplifying deployments across all environments.
  • Established a formal on-call schedule, reducing MTTR for production incidents.
Ruby on RailsNuxtJSPostgreSQL AWSKamalDocker TerraformAnsibleDatadog
02
Software Engineer
Aug 2021 – Oct 2024
General Assembly
Designed, built, and maintained production services powering General Assembly's global learning platform over a 3-year tenure.
  • Owned full-cycle feature delivery — from technical design through production deployment and monitoring.
  • Managed infrastructure and deployments on Heroku and AWS for a global user base.
  • Maintained high code quality through thorough test coverage and active peer code review.
Ruby on RailsReactJSPostgreSQL RedisAWSHeroku
03
Lead Software Engineer
Oct 2020 – Sept 2021
Maevi Sdn Bhd
Led engineering delivery in an agile, test-driven environment, owning both technical execution and team coordination.
  • Authored software development plans and distributed tasks across the team with clear timelines.
  • Championed TDD practices, improving code reliability and reducing regressions.
Ruby on RailsPostgreSQLRedisSidekiq
04
Software Engineer II
Dec 2019 – Sept 2020
AirAsia
Built and maintained customer-facing applications for one of Southeast Asia's largest airlines in a high-availability production environment.
Ruby on RailsReactRedux GCPKubernetes
05
Senior Software Engineer
Nov 2018 – Dec 2019
Fave Asia Technologies Sdn Bhd
Built and maintained high-throughput RESTful APIs handling hundreds of thousands of daily transactions across Southeast Asia.
  • Developed high-throughput APIs ensuring reliability under significant data and traffic loads.
  • Participated in on-call rotation with direct ownership of production incident response.
Ruby on RailsPythonPostgreSQLAWS
06
Software Engineer
Nov 2015 – Oct 2018
Shortcut Asia Sdn Bhd (formerly Suria Labs)
Delivered multiple client-facing web and mobile products across a 3-year consultancy tenure using TDD, Scrum, and Kanban.
Ruby on RailsReactJSReact Native PostgreSQLAWSHeroku
// get in touch

Let's Build Something

I'm currently open to freelance contracts and consulting engagements — software engineering, SRE, or DevOps. Drop me a message and I'll usually reply within 24 hours.

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