Open to opportunities

Isaac Yuen

@isaacyuen

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Senior backend engineer specializing in scalable cloud-native systems and data pipelines.

Hong Kong

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What I'm looking for

I seek senior backend or platform roles focused on building scalable, reliable cloud-native systems, strong CI/CD, and data pipelines, with collaborative teams and clear ownership.

I am a senior backend engineer with deep experience building high-throughput, reliable systems for crypto, telecom, airline, and media industries. I design and implement scalable APIs, data pipelines, and microservices using Java, Python, Node.js and cloud-native tooling.

At OKX I architected and developed a decentralized exchange handling 10,000 QPS, designed an RFQ system on AliCloud achieving 99.99% uptime and sub-300ms responses, and optimized MySQL performance to improve transaction processing by 40%.

I have built data pipelines and encryption/decryption flows on AWS and GCP, implemented Kafka-based ingestion and processing, and deployed solutions with Terraform, CDK and CI/CD. I routinely collaborate with data engineering teams to design ODS schemas and ensure efficient storage and retrieval.

I hold a degree in Chemical and Biomolecular Engineering from HKUST, possess Kubernetes certifications (CKA, CKS), and bring a pragmatic, results-driven approach to observability, performance tuning, and production reliability.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

OKX

Aug 2023 - Present (2 years 1 month)

Architected and developed a high-throughput decentralized exchange (DEX) platform handling 10,000 QPS and designed an RFQ system achieving 99.99% uptime and sub-300ms responses. Optimized MySQL indexing and queries to improve transaction processing speed by 40% for high-volume trading.

Java Spring Boot MySQL Kafka Spring Cloud High Throughput Systems Performance Tuning

Senior Software Engineer

Lenovo PCCW Solutions

Dec 2022 - Aug 2023 (8 months)

Developed data pipelines for encryption/decryption, hashing and masking using AWS EventBridge, Step Functions, Lambda and DynamoDB, ingesting raw data via Kafka into an operational data store and collaborating with data engineering to optimize ODS schemas. Implemented Kafka consumers and APIs to process and store high-throughput data.

Java Spring Boot Kafka AWS Step Functions DynamoDB Lambda Python Terraform

Senior Backend Engineer

IBM Consulting

Jan 2022 - Nov 2022 (10 months)

Developed RESTful and GraphQL APIs for insurance sales flows and built data pipelines and warehousing solutions using Kafka, Step Functions and DynamoDB for airline clients; implemented contract testing and deployed pipelines with AWS CDK and CI runners. Improved reliability of client internal systems through contract testing and automation.

Spring Boot GraphQL Kafka AWS CDK DynamoDB WireMock CI CD

Azure Data Engineer

HK01

Apr 2020 - Jul 2021 (1 year 3 months)

Built data collection pipelines processing ~7TB compressed events daily using Kinesis, Firehose and Lambda; developed ETL with Airflow, Athena, Redshift and BigQuery and backend APIs integrating AI models on Cloud Run. Deployed and maintained microservices on EKS with Helm and implemented monitoring with Prometheus and Grafana.

Python AWS Kinesis Lambda Airflow BigQuery Redshift Kubernetes Helm

Analyst Programmer

List Sotheby’s International Realty

Apr 2018 - Apr 2020 (2 years)

Developed APAC websites, ERB/CMS/CRM and microservices using Spring Boot and Node.js, implemented API caching, search with Elasticsearch and mapping with Google Maps, and built CI/CD pipelines and serverless deployments. Led infrastructure-as-code and SSO integrations to standardize deployments across the region.