Haikal Hilmi
Foto profil Haikal Hilmi

Haikal Hilmi — Data & Software Architect

Scale without the chaos.

I build resilient data & cloud systems that handle the heavy lifting—so you can focus on growing your business. Secure, compliant, and production-ready.
Available for work (Remote/Onsite)
Discuss Your Project
ByteDance logo
DataIns logo
Gadjah Mada Aerospace logo
PetaData logo
PPSMB logo
Robota logo
Semesta Data Digital logo
Telkom Indonesia logo
Tilikan logo
Tokopedia logo
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Infrastructure I've Operated

High-performance computing clusters for large-scale data processing.

8

HPC Servers

4 main + 4 additional

64

Cores (max)

AMD EPYC 7502P

200GB+

RAM / node

Ubuntu 22.04 / CentOS

100K+

Records / day

Pipeline throughput

2× AMD EPYC 7502P (64-core) · 2× AMD EPYC 7252 (32-core) · 4× 16-core · Ubuntu 22.04 & CentOS

About

I'm Haikal Hilmi, a freelance data & software engineer. I build large-scale scraping systems and data pipelines, ship full-stack products for clients, and operate HPC infrastructure. Backend Engineer intern at ByteDance (100k+ RPS), 5.0★ on Upwork, and multiple international hackathon wins. I do my best work on long-term engagements where I can own systems end to end.

Experience

Roles where I've owned systems, led teams, and shipped at scale.

  1. ByteDance

    Feb 2025 – Jun 2025

    Built a microservice handling 100,000+ requests/second.

    Backend Engineer · Intern · Yogyakarta, ID

    Contributed to Tokopedia × TikTok-Shop system integrations.

    • Go
    • gRPC
    • RocketMQ
    • NSQ
    • Bytecloud
  2. Engineering Research & Innovation Center, FT UGM

    Jul 2025 – Jan 2026

    Ran UGM Career Summit for 2,800+ concurrent users with zero downtime.

    Full Stack Software Engineer · Yogyakarta, ID

    • Next.js
    • React
    • TypeScript
    • Supabase
  3. Semesta Data Digital

    Jan 2024 – Nov 2025

    Designed HPC data pipelines — reliability +25%, processing time −40%.

    Data Engineer · Contract · Jakarta, ID

    Operated an 8-server HPC cluster ingesting social-media & news data at scale.

    • Python
    • Elasticsearch
    • PostgreSQL
    • RabbitMQ
    • Docker
    • Grafana
  4. Tilikan Indonesia

    Sep 2023 – Mar 2024

    Analytics dashboards — reliability +50%, cross-team efficiency +70%.

    Web App Developer · Contract · Yogyakarta, ID

    • Next.js 14
    • React
    • TypeScript
    • MongoDB
  5. Global Data Inspirasi

    Jan 2023 – Jan 2024

    Led a team building real-time data dashboards and reusable components.

    Web App Developer · Contract · Yogyakarta, ID

    • Next.js 13
    • React
    • TypeScript
    • TanStack
  6. Telkom Indonesia

    Jan 2024 – Mar 2024

    Penetration-tested critical web platforms and hardened their security.

    Datacomm Product Dev · Intern · Jakarta, ID

    • Python
    • SD-WAN
    • Tableau

How I Work

Straightforward collaboration, built for results.

Engagement

Fixed-price or hourly—whatever fits the project. Open to long-term collaboration.

Communication

Clear, responsive updates throughout the project—no surprises.

Process

Understand the goal, propose the approach, then build and iterate to delivery.

Ownership

I can own a system end-to-end—from tech selection to production.

What clients say

Trusted by teams and organizations to deliver.

As commissioner of Semesta Data Digital and Global Data Inspirasi, I've seen first-hand how Haikal designs data infrastructure, runs large-scale pipelines and scraping with high reliability, and helped shape products like Robota. He was also my teaching assistant for a year—consistent, a fast learner, and highly dependable. He combines genuine technical depth with a strong sense of ownership.
Widyawan, S.T., M.Sc., Ph.D.

Widyawan, S.T., M.Sc., Ph.D.

Commissioner, Semesta Data Digital & Global Data Inspirasi

Yogyakarta, ID

As Director of PT Aksarakan Bhumi Indonesia, I deeply appreciate his work—he not only built the company's website and digital infrastructure, but also drafted our IT security SOPs and actively took part in negotiations with strategic clients, showing a remarkable combination of technical skill, leadership, and business sense.
Alamsyah Pangestu

Alamsyah Pangestu

Director, PT Aksarakan Bhumi Indonesia

Yogyakarta, ID

I had the pleasure of working with Haikal on a scraping project, and he exceeded my expectations in every aspect. Professional, responsive, and highly skilled, delivering high-quality work on time. I highly recommend Haikal—he's a fantastic contractor.
J

Jeesun Kim

Upwork client · Twitter/X Scraper

Aurora, Canada

Haikal is very smart, creative and good at what he does. He is a great communicator and very efficient.
C

Claire Bartolozzi

Upwork client · Tweet Collector

South Yarra, Australia

Haikal was very quick to respond and professional in his work. He even suggested some improvements to the deliverables, which I found useful. I would definitely work with him again.
C

Cristian Buda

Upwork client · PDF→JSON Extraction

Cluj-Napoca, Romania