Experience

Professional Background

A journey through backend engineering — from systems research to building production microservices at scale.

Work Experience

Mar 2024 — Jun 2026

GoCode Pte. Ltd.

Golang Full Stack Developer (backend-focused)

Singapore · Platform technology company building a multi-tenant B2B SaaS platform (accounts, wallets, loyalty, partner networks) for consumer-facing digital businesses in Southeast Asia

•Wrote the first versions of the identity and configuration services and most of the API gateway's middleware, then split them into standalone gRPC microservices; largest individual contributor to six of the platform's ~20 services (~100K end users)
•Wrote 10 Kafka consumers across 5 services, built for at-least-once delivery: manual ack, retry and dead-letter topics, deterministic idempotency keys enforced by unique indexes and carried through to wallet transactions
•Re-engineered the Kafka cascade that propagates rebate rules and transaction limits down a multi-level partner network: level-ordered, keyset-paginated, throttled batches fixed an out-of-memory failure; migrated limits from int64 to decimals with a rehearsed data migration
•Bootstrapped the scheduled-jobs service and co-led its migration from cron to Temporal: retry policies, per-tenant child workflows, compensation on failed credits
•Replaced per-user aggregation queries with batched UNION ALL statements routed across a 128-shard table on a read replica; designed ~30 MySQL tables across 5 services
•Designed the platform-wide audit trail (12 services), built shared ECS logging with secret redaction and OpenTelemetry helpers used in 20 repos, and fixed a production memory leak with pprof
•Built customer segmentation, a call-centre CRM integration and a signed partner OpenAPI end to end; rewrote an internal OpenProject ↔ Slack tool in Go + Next.js with AI coding agents

Go go-zero gRPC Gin MySQL Redis Kafka Temporal OpenTelemetry Prometheus Docker GitLab CI

Nov 2023 — Dec 2023

TikTok Pte. Ltd.

Backend Development Intern — storage infrastructure

Singapore · Global short-video platform

•Built a laptop-runnable test environment for a cross-region object-storage replication service by swapping its internal dependencies (message queue, MySQL, document DB) for open-source equivalents without changing business logic, using runtime function hooking (gohook) and adapter types
•Packaged the swaps as a reusable internal Go library with a one-line API per component; delivered a Docker Compose stack (RocketMQ, MySQL, MongoDB, S3Mock), multi-stage Dockerfiles, a Kitex client that verified the replication APIs end to end, and a user manual

Go Kitex RocketMQ MySQL MongoDB Docker

corey@coreyverse:~/work

$ git log --oneline --author=corey work/

(Mar 2024 — Jun 2026) GoCode Pte. Ltd.

Golang Full Stack Developer (backend-focused) @ Singapore

Platform technology company building a multi-tenant B2B SaaS platform (accounts, wallets, loyalty, partner networks) for consumer-facing digital businesses in Southeast Asia

> Wrote the first versions of the identity and configuration services and most of the API gateway's middleware, then split them into standalone gRPC microservices; largest individual contributor to six of the platform's ~20 services (~100K end users)

> Wrote 10 Kafka consumers across 5 services, built for at-least-once delivery: manual ack, retry and dead-letter topics, deterministic idempotency keys enforced by unique indexes and carried through to wallet transactions

> Re-engineered the Kafka cascade that propagates rebate rules and transaction limits down a multi-level partner network: level-ordered, keyset-paginated, throttled batches fixed an out-of-memory failure; migrated limits from int64 to decimals with a rehearsed data migration

> Bootstrapped the scheduled-jobs service and co-led its migration from cron to Temporal: retry policies, per-tenant child workflows, compensation on failed credits

> Replaced per-user aggregation queries with batched UNION ALL statements routed across a 128-shard table on a read replica; designed ~30 MySQL tables across 5 services

> Designed the platform-wide audit trail (12 services), built shared ECS logging with secret redaction and OpenTelemetry helpers used in 20 repos, and fixed a production memory leak with pprof

> Built customer segmentation, a call-centre CRM integration and a signed partner OpenAPI end to end; rewrote an internal OpenProject ↔ Slack tool in Go + Next.js with AI coding agents

[Go][go-zero][gRPC][Gin][MySQL][Redis][Kafka][Temporal][OpenTelemetry][Prometheus][Docker][GitLab CI]

(Nov 2023 — Dec 2023) TikTok Pte. Ltd.

Backend Development Intern — storage infrastructure @ Singapore

Global short-video platform

> Built a laptop-runnable test environment for a cross-region object-storage replication service by swapping its internal dependencies (message queue, MySQL, document DB) for open-source equivalents without changing business logic, using runtime function hooking (gohook) and adapter types

> Packaged the swaps as a reusable internal Go library with a one-line API per component; delivered a Docker Compose stack (RocketMQ, MySQL, MongoDB, S3Mock), multi-stage Dockerfiles, a Kitex client that verified the replication APIs end to end, and a user manual

[Go][Kitex][RocketMQ][MySQL][MongoDB][Docker]

Professional Background

Work Experience

GoCode Pte. Ltd.

TikTok Pte. Ltd.

Education

Nanyang Technological University (NTU)

South China University of Technology (SCUT)