Josi Aranda
Data Engineer
Macromill Inc.
ABOUT
Hi, I’m Josi — a Principal Data Engineer with over 8 years of experience turning messy data into meaningful solutions. From writing my first SQL query as a data wrangler to designing large-scale pipelines in the cloud, I’ve always been passionate about building systems that just work. These days, I focus on crafting data architectures that are efficient, scalable, and just the right amount of elegant. Whether it’s batch, streaming, or something in between, I love solving the kind of problems that make dashboards light up and stakeholders smile.
Outside the day job, I enjoy creating simple, purposeful websites like this one, sharing what I’ve learned through writing, and exploring ways to be more productive in everything I do. I believe in continuous improvement — not just in code, but in life. If you’re into clean data, clean code, or just want to swap ideas, feel free to reach out. Thanks for stopping by!
SKILLS
Data Engineering Tools
DevOps
GCP
Programming Language
Front End
IDE
EXPERIENCE
Data Engineer
macromill Inc.
Fukuoka, Japan
I’ve just landed at Macromill as a Data Engineer, and I’m genuinely excited to dive in—building fresh pipelines, exploring shiny datasets, and turning all that raw information into insights worth bragging about.
Data Engineer Principal
tiket.com
Greater Jakarta Area, Indonesia
Assigned as principal to Data Infra team, responsible for building the underlying data architecture, managing data clusters, and monitoring performance and costs. Focused on optimizing data operations and ensuring efficient data handling across the organization.
Data Engineer Lead
tiket.com
Greater Jakarta Area, Indonesia
Led a team of three members to develop multiple data products with web and API solutions aimed at increasing data and business operations efficiency through automation. My responsibilities encompass designing and implementing microservices architecture, managing projects and team tasks, and enhancing Salesforce functionality as a side project.
Data Engineer
tiket.com
Greater Jakarta Area, Indonesia
Responsible for creating ETL jobs using Apache NiFi, developing job templates, and custom processors to facilitate seamless data integration with BigQuery. Additionally, led the development of a comprehensive Data Warehouse in BigQuery, ensuring efficient data retrieval, storage, and distribution across the organization. Managed, optimized, and monitored data operations to maintain high performance and reliability throughout the data lifecycle
Data Analyst
Bukalapak
Greater Jakarta Area, Indonesia
Despite the short duration due to the role not aligning with my long-term passion, I gained valuable experience in contributing to data-driven decision-making processes. I was responsible for collecting, analyzing, and interpreting data to provide insights and support strategic decision-making within the organization. The role involved gathering and cleaning data from diverse sources, applying statistical methods to uncover trends and patterns, and preparing comprehensive reports
Data Wrangler
tiket.com
Greater Jakarta Area, Indonesia
Responsible for managing and analyzing data to extract valuable insights and support business decision-making.
Programmer Intern
Amikom University Yogyakarta
Greater Yogyakarta, Indonesia
Assigned as Junior DBA and Backend Engineer. Responsible for maintaining and optimizing database systems to ensure reliability and efficiency, and also develops and maintains REST APIs using ASP.NET Web API, focusing on efficient data exchange and system integration.
RECOMMENDATIONS
Maria Tjahjadi
Head of Data Engineer
Philip Morris International
"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, cant wait to work with him again."
Victor Setya
VP of Data
tiket.com
"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."
Dicky Adrian Hartantato
Head of Data
tiket.com
"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!"
Fari Qodri Andana
Senior Data Engineer
Mindvalley
"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."
Raffi Febriandika Utama
Data Engineer
Samsung R&D Institute Indonesia
"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."
Risa Kurniawan
Account Manager
tiket.com
"Josi Aranda is a great colleague, known for being detail-oriented, smart, and excellent at analysis and problem-solving."
Dian Nurhayati
Senior BI Analyst
Sayurbox
"Josi is incredibly humble and was my partner in my first workplace. He is intelligent and kind, excelling in big data analytics and all aspects of data, including data engineering, data science, and data analysis."
Sugirwo
Sr Sales Performance Analyst at Bukalapak
Bukalapak
"Josi helped us improve every report, making them better and smoother than before."