Backend Software Engineer
Backend engineer building scalable distributed systems and production AI applications.
6+ years of experience across e-commerce, customer-engagement, and enterprise platforms, with deep work in Go, Python, Java, C#/.NET, microservices, cloud infrastructure, and Retrieval-Augmented Generation applications.
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Backend Software Engineer · Jakarta, ID
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Backend depth, infrastructure awareness, practical delivery.
Fazrin is a backend software engineer with 6+ years of experience designing and building scalable systems across global e-commerce, enterprise, and customer-engagement platforms. He has worked on distributed backend services, cloud cost optimization, internal tooling, merchant platforms, and production AI systems. His work combines backend depth, infrastructure awareness, and practical product delivery.
Tools and technologies
A practical toolkit built across six years of production backend and infrastructure work.
Where I've worked
Six years across enterprise SaaS, global e-commerce, and platform engineering teams.
Software Engineer II
Trilogy
July 2025 – Present
Remote, United States
- Supported the migration of Khoros into Trilogy ownership.
- Built an infrastructure knowledge base for engineering and SaaS teams.
- Contributed to Khoros Care, a customer-engagement product spanning around 30 backend services and native mobile apps across US, EU, and APAC regions.
- Worked on AWS cost-optimization initiatives across EKS, ECS, Aurora, Elasticsearch, and S3 Intelligent Tiering.
- Integrated Link-in-Bio functionality into Khoros One.
- Resolved customer-reported bugs and support tickets in an AI-first engineering workflow.
Senior Backend Software Engineer
ByteDance
February 2024 – July 2025
Jakarta, Indonesia
- Developed Pearl, an internal platform for managing and monitoring TikTok and Tokopedia shops.
- Migrated Tokopedia transaction data into ByteDance and TikTok internal tooling.
- Helped enable unified post-acquisition monitoring of shop performance.
Senior Backend Software Engineer
Tokopedia
August 2021 – February 2024
Jakarta, Indonesia
- Developed Enterprise Marketing Solution for Official Store onboarding, performance monitoring, and advertising campaign management.
- Reduced Tokopedia shop onboarding SLA by 65% through automation and notification improvements.
- Built backend services for Dekara, improving reliability, scalability, and security of client-facing services.
- Developed internal communication tooling for stakeholder-to-seller engagement.
- Migrated production services and databases from Ubuntu 18 to Ubuntu 22.
- Selected for Tokopedia's IGNITE top-talent program.
Backend Software Engineer, Part-time
QolaQ Foundation
August 2022 – April 2023
Jakarta, Indonesia
- Planned and developed backend services for authentication, user management, KYC verification, and internal tooling.
Featured work
A growing gallery of independent projects, starting with a production RAG application.