Worked and launched a green-field service Lustre File Storage (LFS), a new OCI cloud service for high-performance file storage. Previously worked in File System Storage service (FSS), which provides fully elastic, highly available & distributed file storage.

• Architected and implemented a capacity management model enabling tenant-aware routing to dedicated and default resource pools, site-constrained host allocation and an automated reservation hydration mechanism to maintain desired pool configurations.

• Designed and implemented the management plane of “object sync” feature, facilitating the import/export of files between Object Storage buckets and Lustre file systems. I implemented host selection logic, integrated with object storage API with resource principal authorization mechanism, and implemented start and stop APIs of sync jobs.

• Designed and implemented changes needed for FSS to support IPv6 single and dual (with existing IPv4) stacks, from DNS level, down to API server (VNIC management) and NFS server level

• Designed and implemented end-to-end scheduled snapshots, a new feature where users can schedule filesystem snapshots to be taken and deleted with a specified frequency and timezone. I implemented new service APIs, stateful workflows, indices and multithreaded programs in Java; wrote automated canary tests and performance tests

Key contributions that I have made include:

• Designed and implemented end-to-end new components for a new CI/CD pipeline to reduce regressions and incidence of software rollbacks using Terraform, Docker and NoSQL

• Implemented and deployed middleware integration for features such as Audit (Event Logging) and AuthN/Z in Java, and modified existing API to support tag-based authorization

• Increased service reliability e.g. by setting up new canary service, fuzz testing/fault injection in pre-production fleets to simulate external service failures

• Investigated and resolved Sev-2 tickets in production fleets as an SME and on-call e.g. latency and 5xx error spikes, and executed ops tasks e.g. instance provisioning, teardown and patching to maintain fleet health

• Improved integration + unit test coverage by >10% with JUnit, Mockito & Python unittest

• Scoped out project effort, planned completion timeline, architected system diagrams, developed test plans, contributed to technical discussions and mentored new hires/junior engineers

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Tools used: Node.js, Express, MongoDB, Firebase, AWS S3, Redis, Stripe SDK

• Implemented PayPal Working Capital service on the PayPal Business mobile platform for over 3 million users

• Created data service and models to load remote JSON data from APIs and implemented front-end features w/ MVVM architecture, with localization support

• Led a release (V1.8.0) with Phase 1 of PayPal Working Capital service and monitored user rollout

• Assisted product managers in user testing sessions

• Partook in code reviews on production-level code, sprint-planning and retrospectives

• Technologies/Frameworks: Swift, SnapKit, NodeJS, Postman, Jenkins, Loggly and other internal tools

ShopBack is a Singaporean-headed e-commerce startup that utilises the cashback reward program. Since its inception in 2014, ShopBack has rapidly grown to become the top cashback site in Asia Pacific, such as Singapore, New Zealand, Malaysia, Indonesia and Philippines.

• Developed and implemented new rides service feature for 2 million users, with search and result display functions.

• Implemented front-end features w/ MVVM architecture, with localization support

• Implemented food aggregation POC app

• Discussed application requirements with various stakeholders including mobile app designer and product managers

• Language/APIs: Swift, Cartography, Google API, Toast, and more