Membangun Data
Platform yang Beneran
Berguna
Gue Josi Aranda, Principal Data Engineer yang fokus bangun data platform biar cost turun, sistem makin reliable, dan beneran bikin bisnis jadi lebih bernilai — bukan cuma keren di diagram doang.
2016
Pengalaman
Macromill Inc.
Apr 2025 - Sekarang
Fukuoka, JP
Principal Data Engineer
Design dan lead platform lakehouse baru basis BigQuery, migrate dari setup jadul Athena + S3. Bangun dan operate CDC pipeline skala gede pake Debezium, Pub/Sub, dan Dataflow. Bikin standar data modeling dan schema evolution buat layer bronze, silver, dan gold. Design dan maintain infra multi-cloud (GCP & AWS) pake Terraform, sambil lead performance testing, observability, dan cost optimization bareng tim SRE dan platform.
tiket.com
Apr 2022 - Apr 2025
Jakarta, ID
Principal Data Engineer
Design dan implement arsitektur data yang scalable dan otomatis buat dukung pertumbuhan bisnis yang cepet. Potong cost infra dan ingest sampe 75% di beberapa proyek. Bangun framework self-service pipeline generation pake Airflow, dbt, dan internal tools, nge-cut waktu delivery pipeline sampe dua hari kerja. Konsolidasiin Airflow cluster, hemat sampe 50% cost operasional sambil tetep jaga reliability.
tiket.com
Nov 2018 - Apr 2022
Jakarta, ID
Data Engineer Lead / Data Engineer
Naik dari Data Engineer jadi Lead, ngurus data retrieval, storage, dan distribution. Design dan implement data warehouse basis BigQuery yang scalable. Maintain uptime 99% buat service yang jalan di GKE. Riset dan implementasi awal buat adopt Airflow dan dbt. Bangun custom processor Apache NiFi dan bikin microservices internal (React + Golang) buat tim data.
Bukalapak
Sep 2018 - Nov 2018
Jakarta, ID
Data Analyst
Meski cuma sejenak karena role-nya nggak sejalan sama passion jangka panjang, gue dapet experience berharga kontribusi di proses decision-making berbasis data. Tanggung jawab gue collect, analyze, dan interpret data buat kasih insight dan dukung strategic decision-making di organisasi. Kerjanya gathering dan cleaning data dari berbagai sumber, pake metode statistik buat nemuin tren dan pola, dan bikin report yang komplit.
tiket.com
Okt 2016 - Sep 2018
Jakarta, ID
Data Wrangler
Ngurus dan analyze data buat ekstrak insight berharga dan dukung decision-making bisnis.
Toolkit
The
Tool
Box
Bahasa harian. Pipelines, automation, glue code, script one-off yang tiba-tiba jadi production. Kalau ngurusin data, Python pasti ikutan.
Sertifikasi
Professional Cloud Architect
Google Cloud • Valid until 1 Februari 2028
Professional Data Engineer
Google Cloud • Valid until 12 Desember 2027
Data Streaming Engineer
Confluent
DAG Authoring for Apache Airflow 3
Astronomer
Apache Airflow 3 Fundamentals
Astronomer
Apache Airflow 2 Fundamentals
Astronomer
Terraform Authoring and Operations Professional
HashiCorp
Kata Mereka
“Josi was our first principal level hire to lead the transformation of our data culture in Macromill. Josi was the perfect candidate to bridge the gap we had. He then took ownership of the architecture and implementation; worked with experienced data engineers to setup standards to scale operations; and even went beyond to set it up for other system team's due their lack of capability and time.”
Jer Wei Yeoh
Engineering Manager, Macromill Inc.
“His versatility and technical depth made him a reliable go-to person for complex problems. Josi was also a great team player—collaborative, proactive, and always willing to step in where needed.”
Victor Setya
VP of Data, tiket.com
“Josi is a valuable team member, he will always find a way to solve any technical problems. Not only an independent learner, but he also keen to share his knowledge to other people. Working with him has been a pleasure, can't wait to work with him again.”
Maria Tjahjadi
Head of Data Engineering, Philip Morris Intl.
“Josi is a very versatile data engineer with deep knowledge in infrastructure and data pipeline technology. He transformed our data pipelines into pipelines with high degree of automation. He also managed to migrate our large Airflow clusters to save a lot of cost. Overall, he is a great peer whom I enjoyed working with.”
Fari Q. Andana
Senior Data Engineer, Mindvalley
“Josi is not only fast and highly skilled, I've watched him grow and evolve, moving from a backend engineer to data operations, and eventually transitioning to data infrastructure. This remarkable journey highlights his dedication, adaptability, and technical expertise. I wholeheartedly recommend Josi for any future opportunities!”
Dicky A. Hartanto
Head of Data, tiket.com
“Josi was my mentor when I was an intern at tiket.com. His expertise in Data Engineering and Infrastructure significantly affect the smoothness process of the migration. His guidance and mentorship enhanced my professional growth as a Data Engineer.”
Raffi F. Utama
Data Engineer, Samsung R&D Institute Indonesia