I build scalable, high-availability distributed systems for e-commerce and lending/banking.
Senior software engineer with 6+ years of experience building scalable, high-availability distributed systems — across both e-commerce and lending/banking. I've shipped products at consumer scale and engineered the complex, compliance-driven systems behind enterprise loan lifecycles.
In e-commerce, I built and scaled backend services that handled high traffic and high transaction volumes, optimizing performance and reliability under real-world load. In lending/banking, I design and own the authorization and workflow layers — fine-grained RBAC, multi-level approval chains, and business rule engines that map precisely to regulatory and operational constraints.
I take ownership of system design, collaborate across teams to align technical decisions with business logic, and mentor engineers to raise the quality bar. In fast, agile environments, I deliver multiple features per release cycle without sacrificing quality or compliance.
Lead and mentor a team of 5 engineers across SMLC, SMLP, and CLIMS. Own technical direction for authorization and workflow layers, drive Agile delivery with code review and CI/CD standards, and partner with product and compliance to ship multiple features per release cycle.
Led a backend team of 5 engineers across Python (Django/FastAPI) and Java/Kotlin (Spring Boot) microservices. Owned Agile delivery, standardized CI/CD with Docker, Kubernetes, and GitHub Actions, and established Datadog monitoring to sustain high availability.
Developed a strong foundation in data structures, algorithms, and object-oriented programming. Completed a graduation thesis applying the OpenAI GLOW network to customize object images to support investigation work.
Technical challenge: unify the end-to-end loan value chain for Philippine National Bank (SMLC, SMLP, CLIMS) under strict regulatory constraints. Solution: architected fine-grained RBAC (FAP/DAP), multi-level approval chains, and business-rule engines; defined service/API boundaries and hardened Oracle/Hibernate data access. Impact: compliant rollout across three systems with predictable multi-feature releases.
Technical challenge: 12M+ users, 2M+ DAU, ~10,000 req/s peak on a Django monolith bottleneck. Solution: led migration to microservices with event-driven Kafka architecture for core flows plus AWS serverless (SQS, SNS, Lambda). Impact: ~35% lower API latency, ~25% lower cost, ~99.9% uptime with Datadog and 80%+ coverage.
Technical challenge: 50,000+ products and ~1,000 concurrent users with slow search and long deploy cycles. Solution: reworked search and PostgreSQL access, added Redis caching, containerized with Docker and built GitHub Actions CI/CD. Impact: ~40% performance improvement and ~30% faster deployments.
Technical challenge: large-scale content ingestion and responsive reading under heavy crawling and background-job load. Solution: built Django backend with Scrapy and Celery queues on PostgreSQL, responsive Next.js frontend, and GitHub Actions CI/CD. Impact: stabilized high-volume ingestion and automated releases for faster iteration.
High-accuracy game automation bot using multithreading in Python, C++, and C#. Migrated from Python to C++ for significant performance gains, reducing execution time by over 50% and miss rates to near 0%.
Applied the OpenAI GLOW network to customize object images to support investigation work, comparing generated images with normal images on Vietnamese portrait datasets.
A voice assistant that listens, speaks, and executes Vietnamese commands — greetings, time, web/app launch, Google search, email, weather, music, wallpaper, news, and Q&A.
2015 — Third Prize, National Mathematics Olympiad (Grade 12)
2016 — Third Prize, National Mathematics Olympiad (University)
2016 — Consolation Prize, National Computer Science Olympiad
2017 — First Prize, National Mathematics Olympiad (University)
2017 — Third Prize, National Computer Science Olympiad
2018 — First Prize, National Mathematics Olympiad (University)
2019 — Second Prize, Student Scientific Research Competition, People's Security Academy