Looking for a job

Yuwono Bangun Nagoro

@yuwonobangunnagoro

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I build high-availability backend microservices that improve e-commerce performance, GMV, and operational efficiency.

Indonesia

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What I'm looking for

I'm open to leadership opportunities and relocation, where I can build high-availability backend systems, improve platform performance, and help teams deliver measurable business outcomes.

I've built and scaled backend systems for Hypefast, Astro, Lemonilo, Airy, and Tokopedia across Southeast Asian e-commerce and fast-commerce products.

At Hypefast, I cut average B2B catalog API latency by 35%, reduced third-party API errors by more than 80%, and built WPScanner to help customer teams identify vulnerabilities across brand sites.

At Astro, I architected order features including GrabMart integrations, multi-order checkout, and Astro Balance top-ups that drove quarterly GMV increases of 20%–35%. I also reduced monthly order-related support tickets by 25% through automated SLA adjustments and an improved order widget.

I work primarily with Go and Java Spring Boot, building microservices and event-driven systems with gRPC, Redis, PostgreSQL, GCP, and AWS. I've also migrated legacy services, addressed technical debt, reviewed code, and mentored junior engineers.

Experience

Work history, roles, and key accomplishments

Senior Backend Software Engineer

Hypefast

Apr 2025 - Aug 2026 (1 year 4 months)

Refactored B2B catalog module to slash API latency by 35% and reduced third-party API error rates by over 80% via exponential backoff. Engineered organizational features for brand hierarchies and eliminated 70% of stable feature flags to resolve technical debt.

API Optimization Refactoring Exponential backoff Feature Flag Management Security Tools Automation

Senior Backend Software Engineer

Astro

Apr 2022 - Apr 2025 (3 years)

Architected core order features including GrabMart integrations and multi-order checkout, driving quarterly GMV increases of 20-35%. Reduced customer support tickets by 25% through automated SLA adjustments and order widget revamp.

Java Spring Boot Go gRPC Redis PostgreSQL GCP Microservices SLA Management Unit Testing

Backend Software Engineer

Lemonilo

Jun 2020 - Dec 2021 (1 year 6 months)

Built and deployed backend services for a dynamic page CMS and developed a secure health discussion forum API. Programmed gamification and referral engines to drive user acquisition and engagement.

Backend Development CMS API Development Gamification Referral Systems

Backend Software Engineer

Airy

Jun 2018 - Apr 2020 (1 year 10 months)

Architected scalable microservices using Java Dropwizard and Go, deployed on Kubernetes via AWS. Engineered highly-concurrent systems for flash sales and referral tracking, and developed advertisement tracker and attribution reporting tools.

Java Dropwizard Go Kubernetes AWS Microservices Concurrency Ad Tracking Mentorship

Backend Software Engineer

Tokopedia

Aug 2016 - Jun 2018 (1 year 10 months)

Spearheaded migration of core Order Services from legacy Perl monolith to modern Go microservices, achieving 20-30% reduction in endpoint latency. Designed and deployed automated commission debit system for official store orders.

Go Microservices Migration Legacy Systems System Design Automation