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Iwan Budi Kusnanto

@iwanbudikusnanto

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Technical architect at OSOME and former Tokopedia architect who cut Aurora PostgreSQL infrastructure costs by 50%.

Indonesia

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At OSOME, I replaced hard-coded feature flags with a GitOps-based architecture using S3 and Redis. I also refined queries and indexes to reduce Aurora RDS PostgreSQL infrastructure costs by 50%, cutting CPU usage from 42% to 15%.

At ThreeFold.Tech, I developed and launched a multi-platform VPN application for iOS, Android, macOS, and Windows, using Rust for its core engine. I also developed storage servers in Rust, including one solution from scratch.

At Tokopedia, I worked on the technical architecture of critical product services handling over 60,000 requests per second daily. I improved API and Elasticsearch ingestion scalability and resiliency, and optimized the largest PostgreSQL instance across the application, PgBouncer, and database layers.

Earlier, I led development of Tokopedia Development Kit, a shared Go library for microservices, and contributed to storage, networking, and real-time communication projects. My open-source work includes Go libraries, a Python MQTT client, and Rust projects such as a NetBird relay and a PostgreSQL MCP server.

Experience

Work history, roles, and key accomplishments

Technical Architect

OSOME

Jul 2025 - Mar 2026 (8 months)

Replaced hard-coded feature flags with a GitOps-based architecture leveraging S3 and Redis, significantly increasing team agility while maintaining cost-effective infrastructure. Delivered a 50% reduction in infrastructure costs for Aurora RDS PostgreSQL by leading a performance overhaul that slashed CPU usage from 42% to 15% through systematic query and index refinement.

GitOps S3 Redis Aurora PostgreSQL Performance Optimization Query Optimization Indexing AI Memory Knowledge Base

Staff Software Engineer

ThreeFold.Tech

Mar 2024 - May 2025 (1 year 2 months)

Successfully developed and launched a multi-platform VPN application (iOS, Android, macOS, Windows) from scratch to the PlayStore and AppStore, utilizing Flutter (Dart), Kotlin, and Swift for the UI, and Rust for the core engine. Developed and delivered several robust storage servers using Rust, including developing one solution from scratch and hardening others for production environments.

Flutter Dart Kotlin Swift Rust VPN Mobile Development Storage Systems Overlay Operating System Distributed Systems

Technical Architect

Tokopedia

Aug 2020 - Mar 2024 (3 years 7 months)

Responsible for technical architecture of critical product services handling over 60,000 requests per second daily, focusing on scalability and high availability. Spearheaded development of a resiliency guide and library, strengthened monitoring and observability, and engineered optimizations for Redis cluster scaling and PostgreSQL performance.

Architecture Scalability High Availability Resiliency Monitoring Observability Redis PostgreSQL Elasticsearch APIs Rate limiting PG Bouncer

Principal Engineer

Tokopedia

Aug 2018 - Jul 2020 (1 year 11 months)

Fixed a bug in the internal graceful restart tool within the first few weeks of employment, avoiding service downtime. Led development of Tokopedia Development Kit, a high-quality shared library in Go for microservices, and spearheaded a rapid 3-month re-architecture of the critical Product Detail Page (PDP) to manage ~20 service dependencies.

Go Microservices Shared Libraries Architecture Product Detail Pages API Wrappers Observability

Senior Software Engineer

GIG Technology

Nov 2016 - Jun 2018 (1 year 7 months)

Designed and built a Go transaction log server for NBD, a code generator from RAML to Go/Python/Nim, and a Go client library for distributed storage with encryption, compression, and erasure encoding. Developed an S3-compatible storage server and researched high-performance networking using user space network stack.

Go Python Nim NBD Transactional Logs Code Generation RAML 0 Stor 0 Db Encryption Compression Erasure Codes S3 Minio Networking User Space Network Stack

Software Engineer

Self Employed

Jan 2011 - Sep 2016 (5 years 8 months)

Delivered custom software solutions to local and international clients, including a YCombinator-backed technology company. Key areas included backend and cloud development, real-time communication, native component engineering, and embedded systems.