Professional Summary

  • Senior Software Engineer & Tech Lead with 8+ years building and operating high-throughput fintech, e-commerce, and real-time systems serving millions of users.
  • Expert in Ruby on Rails, Vue/Nuxt, and cloud-native, distributed, event-driven architectures; highly proficient with PostgreSQL and Redis.
  • Certified Scrum Master and AWS Solutions Architect Associate.
  • Experienced tech lead, driving technical design and architecture decisions.

Professional Experience

SEPHORA
Senior Fullstack Developer
Singapore 04/2021 - Present
  • Served as tech lead for multiple projects: designed technical architecture, split epics into stories, groomed tickets, and collaborated with cross-functional teams to deliver scalable solutions.
  • Designed, built, and operated large-scale e-commerce and payment systems serving millions of users across regions; ensured low-latency APIs and stable performance during peak campaigns.
  • Built agile delivery pipelines: led Scrum, managed backlogs, prioritized releases, and used analytics to optimize system reliability and throughput.
  • Engineered platform features:
    • Designed secure authentication and authorization flows: JWT, OAuth, social login, identity management, MFA, and fraud prevention (Forter) with robust access controls
    • Integrated third-party services:
      • CRM, loyalty, and rewards modules; built admin interfaces
      • Payment gateways: Adyen, PayPal, Braintree
      • Fraud detection: Forter, etc.
    • Built resilient, event-driven data synchronization and migrations
    • Led migration from monolith to microservices and BFF using event-driven patterns
  • Improved system observability, incident detection, and recovery using New Relic and structured logging; partnered with product, platform, and QA teams to deliver reliable checkout and payment experiences.
Tech stack: Ruby on Rails, Vue, Nuxt, AWS, RabbitMQ, Java Spring, NewRelic
AIRHOST
Fullstack Developer
Singapore 12/2019 - 04/2021
  • Developed IoT-based smart-lock platforms requiring secure, real-time access control and synchronization.
  • Integrated multiple external providers and third-party APIs (RemoteLock, KeyWe, Keycafe, ...) with strong reliability requirements.
  • Integrated top OTAs (Ctrip, Booking.com, Expedia, Airbnb, Rakuten, ...) for seamless listing publication and real-time reservation sync—streamlining property management.
  • Built transactional booking flows with promotions, pricing rules, and automated tax handling.
  • Created clean, well-documented APIs (Swagger/OpenAPI) to accelerate third-party integrations.
Tech stack: Ruby on Rails, jQuery, PostgreSQL, AWS
IPCOIN EXCHANGE
Backend Developer
Vietnam 08/2018 - 12/2019
  • Implemented a high-performance, fault-tolerant trading platform for a cryptocurrency exchange (Binance-like), including:
    • Trading engine: real-time order matching, transaction execution, price ladders, and fee calculation under strict latency and consistency requirements
    • Real-time and historical OHLCV (candlestick) aggregation pipelines for market analytics and visualization
    • Event sourcing for auditability, replayability, and robust recovery
    • Comprehensive admin dashboard for monitoring, user management, and operational controls
    • Robust user security: OTP, JWT, device session tracking, sign-in alerts, security notifications
    • Real-time trade notifications for users and admins
  • Integrated blockchain wallets (BTC, NEO, CoolWallet) and implemented secure asset and key management flows for user protection.
  • Implemented KYC (Know Your Customer) processes for regulatory compliance and user onboarding.
  • Built distributed, scalable microservices using Docker, Kubernetes, Kafka, and RabbitMQ, with zero-downtime deployment strategies for high availability and maintainability.
Tech stack: Ruby on Rails, PostgreSQL, Blockchain, Docker, Kubernetes, Kafka, RabbitMQ, Nodejs
CODE ENGINE STUDIO
Fullstack Developer
Vietnam 11/2016 - 06/2018
  • Built a time-tracking SaaS (similar to Toggl)
  • Developed rental home management app (Zilly, now Tellus) with lease, property, and chat modules
  • Implemented Elasticsearch integration for search and analytics
  • Maintained CMS platforms for US clients
Tech stack: Ruby on Rails, Angular, PostgreSQL, Elasticsearch, SendBird, SwaggerUI

Skills

Languages & Frameworks

Ruby on Rails, Go, Java Spring, Vue, Nuxt, Node.js, Angular, TypeScript, ...

Databases & Caching

PostgreSQL, Redis, Memcached, DynamoDB, ...

Cloud & DevOps

AWS (EC2, ECS, S3, DynamoDB, API Gateway), Docker, Kubernetes, New Relic

Search & Analytics

Elasticsearch

APIs

Swagger / Openapi, Postman

Messaging & Streaming

RabbitMQ, Kafka

Testing & Tools

RSpec, Cucumber, Git, TDD

Specialized

AI, Blockchain, Microservices, Design Patterns, Event-driven systems

Certifications

AWS Associate Solutions Architect
2025
Professional Scrum Master™ I (PSM I)
2023
SQL Advanced (Hackerrank)
2024

Education

Da Nang University of Technology and Sciences
B.Sc. in IT Engineering
08/2012 - 08/2017