Zulfahmi Habibi Email & Phone Number

Jakarta, Indonesia

• Initiated and developed a denormalized database, reducing hotel search latency from 1.5 seconds to 300 ms with 1,700 RPS, and increasing hotel selling rates by 20% due to improved availability.
• Developed a priority queue system using Kafka to update room availability. Processed 556,000 unique data per minute, reducing update time to under 5 minutes for high-priority data.
• Reduced hotel availability latency from 2.7 to 1 second by cutting API calls by 83% through enriched responses and implementing data caching.
• Migrated issuance flow to a dedicated microservice, increasing development speed by 2 times and enhancing monitoring and logging for better performance tracking.
• Upgraded Java from version 8 to 21 and enabled virtual threads to reduce RAM consumption by up to 40%.
• Introduced graceful shutdown and Kafka consumer sleep mechanisms, reducing deployment errors by 95%.

Indonesia

• Refactored Promo Quota usage flow with an asynchronous pattern, increasing API response speed from ~ 100ms to ~ 40ms and preventing overbooking through a cache Write-Back pattern with thread locking.
• Built a Golang-based microservice to distribute promo benefits (discounts, cashback, coupons), handling hundreds of thousands of transactions daily with a 99% success rate.
• Led the migration of credit card number hashes on the promotion side, aligning quota limits with payment identities to eliminate overbooked quotas and prevent double-counted usage.
• Developed the promotional schema by creating a time-based promo quota system with daily, weekly, and monthly intervals, increasing customer engagement by over 20%.
• Collaborated on Tokopedia’s one-click checkout feature, integrating promo validations and benefit calculations, which streamlined the checkout process and improved transaction efficiency.

Bogor

codepanda is a platform for creator/developer and conceptor/client. codepanda focusing towards computer science's student in Bogor Agricultural University as the developer in order to increase their hardskill and softskill.

Gading, Serpong

Ektizo School of Coding is an organization which focusing in teaching programming to children. I'm as a teacher, teach:- Scratch by MIT- C programming language

Bogor

Teaching Assistant for these courses: - Programming language- Algorithm & Programming- Analysis of Algorithm

Bogor

internship program, develop backend system using java spring and postgresql for supply chain management system