Backend & Map Infrastructure Engineer
Building scalable backend systems and clean product experiences.
Full-stack engineer who builds Vietnam-tuned map & geocoding APIs — PostGIS, ClickHouse, and event-streaming pipelines that cut Google Maps cost and stay fast under real production load.
Quick Snapshot
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Experience
−0%
Latency cut
0
Countries
0M+
Events / Day
Backend & Streaming
Databases & Maps
Frontend & DevOps
Featured Products
bTaskee
Own bTaskee's map, administrative-boundary and geographic-pricing domain across 4 countries (Vietnam, Thailand, Malaysia, Indonesia). Built high-performance map & routing APIs and a real-time event pipeline (Kafka → ClickHouse) powering apps and internal logistics.
Travel Easy Booking Platform
Backend-led ticketing & booking platform covering flights, hotels, tours, and eSIM under one secure pipeline. Integrates multi-provider search aggregators, payment gateways, and automated ticketing with robust logging.
Work Experience
Senior Backend Engineer / Map Infrastructure OwnerCurrent
- 100% owner of bTaskee's mapping domain, administrative boundaries, and geographic pricing boundaries across 4 regional countries (Vietnam, Thailand, Malaysia, Indonesia).
- Designed and built high-performance map and routing APIs supporting both end-user apps and internal logistics workflows.
- Processed 20M+ message events/day in real-time by integrating and optimizing streaming pipelines with Kafka and ClickHouse, reducing latency by 30%.
- Developed operations portal backend utilizing Remix.js to optimize internal task dispatching and customer support management.
Fullstack Developer / Backend Lead
- Led the backend team for an online ticketing & booking platform spanning flight tickets, hotels, tours, and eSIM, owning the architecture and core service design.
- Built scalable, secure booking APIs and integrated multi-provider search, payment gateways, and email/notification systems for automated booking and ticketing workflows.
- Defined modular data structures and service boundaries, and drove code quality across NestJS and Next.js.
Fullstack Developer
- Awarded "Best Performance Award 2023" for project delivery excellence.
- Maintained and enhanced feature logic, improving frontend response times and backend API query performance.
- Conducted thorough testing and refactored core code modules to ensure system stability.
Fullstack Developer
- Designed and modified customized web applications tailored to specific client needs and specifications.
- Developed modular, reusable UI components that accelerated future project build times.
- Collaborated with UX and backend teams to optimize data visualization and interface responsiveness.
Chunking Strategies That Actually Improve RAG
Fixed, recursive, and semantic chunking compared on the same corpus — with the recall numbers that show why splitting documents well matters more than your embedding model.
Jun 26 · 9 min read
Hybrid Search: Full-Text + Vector in One Postgres Query
Combine PostgreSQL full-text search and pgvector in a single query with Reciprocal Rank Fusion — keyword precision plus semantic recall, with a real benchmark.
Jun 25 · 9 min read
Get in Touch
Let's build something great together.
Whether you are looking to hire a full-time engineer, discuss map infrastructure scaling, or want to collaborate on a project, feel free to reach out. I am always open to discussing new opportunities.