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Andi Hermanto

@andihermanto

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I build high-availability Java distributed systems for payments, fintech, and large-scale operations.

Hong Kong

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I've built and operated high-availability distributed systems for OKX, Lalamove, and JD.ID, with over eight years focused on Java, Spring Boot, payments, and large-scale service reliability.

At OKX, I deployed payroll, tax-form, and long-term incentive platforms across multiple regions, reducing manual processing by 80%. I also implemented Kafka event streaming for real-time employee notifications across 10 regions.

At JD.ID, I led a nine-person team and launched the award-winning JD Balance wallet, while designing Kafka-based SAGA workflows for consistent payment, order, inventory, and notification services. I also re-architected a batch pipeline from 72 hours to 4 hours and tuned checkout services handling more than 200,000 daily transactions.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

OKX

Sep 2023 - Apr 2026 (2 years 7 months)

Deployed unified payslip and tax-form systems across multiple regions, reducing manual processing by 80%. Implemented Kafka event streaming for real-time employee notifications.

Java 17 Spring Boot Kafka Redis MySQL S3 AWS RDS Kubernetes Distributed Systems Event Driven Architecture

Senior Backend Developer

Lalamove

Aug 2022 - Jun 2023 (10 months)

Participated in migrating a legacy PHP monolith to Java Spring Boot and implemented a centralized tax-calculation revamp. Delivered the long-haul order feature using RPC and asynchronous message-queue workflows.

Java 8 Spring Boot MySQL Redis Elasticsearch Message Queue RPC Multithreading Async Workflows and Background Jobs

Team Lead & Senior Backend Developer

JD.ID

Jun 2020 - Jul 2022 (2 years 1 month)

Led a team of 9 and owned the end-to-end architecture of the payment-processing system. Designed the award-winning JD Balance wallet and implemented SAGA pattern over Kafka for data consistency.

Java 8 Spring Boot Kafka MySQL Redis Message Queue Saga Pattern Distributed Transactions Team Leadership Multithreading Exponential backoff Idempotency

Backend Developer

JD.ID

Mar 2018 - May 2020 (2 years 2 months)

Led end-to-end integration of GoPay as a payment method, achieving a 95% success rate. Designed a service-fee engine for instalment payments and sustained 200,000+ transactions per day on the checkout path.

Java 8 Spring Boot MySQL Redis Payment Systems High Throughput Systems Integration

Senior Software Programmer

PT Digital Mind System

Jun 2014 - Dec 2017 (3 years 6 months)

Supported the core loan-origination platform for Bank Danamon, including customer data collection and document verification. Developed an ID/Taxpayer-ID validation service integrated with government databases.

C#.NET MS SQL Server Credit Processing Identity Verification Web Services

Programmer

PT Care Technologies

Jun 2013 - May 2014 (11 months)

Built an e-cargo insurance system for Lippo Insurance, enabling digital policy issuance and automated claims processing through web-service integrations.

Web Services Insurance Systems Integration