LEANG TRI
SENIOR AI|AUTOMATION ENGINEER
Singapore
Summary
I'm a senior full-stack engineer specializing in AI systems, agent pipelines. Over the past years, I've built production-grade platforms that combine modern web stacks (Next.js, React, Node.js, Python) with advanced AI workflows such as retrieval pipelines, vector indexing, multi-step agents, custom tool executors, and structured output models. I've led projects where the backend is driven by Python/TypeScript services, orchestrating model inference, tool calling, function routing, and real-time data interaction through WebSockets and serverless APIs. My experience includes implementing agent frameworks with LangChain, custom RAG layers, OpenAI function-calling, multi-tool action planners, and hybrid knowledge bases using PostgreSQL + vector embeddings. On the full-stack side, I've delivered scalable dashboards, admin tools, and task automation systems using Next.js, Supabase, Prisma, and AWS. I'm comfortable designing the whole workflow like prompt engineering, embeddings tuning, API architecture, caching, trace logging, evaluation, and deployment pipelines.
Overview
7
7
years of professional experience
1
1
Language
Work History
AI Full-Stack & Agent Engineer
NovaStack Labs
06.2022 - 10.2025
- Built multi-tool AI agents with LangChain and OpenAI function calling, integrating internal REST APIs, Slack, Google Calendar, and custom webhooks for workflow automation.
- Implemented RAG pipelines with embeddings, vector search, and hybrid keyword filtering for large internal knowledge bases (PostgreSQL and pgvector / Elastic).
- Designed a tool-execution layer that routes user intents to atomic tools (search, CRUD, messaging, reporting), with structured outputs and type-safe schemas in TypeScript.
- Developed a real-time operations dashboard in Next.js/React with server-side data fetching, background jobs, and WebSocket-based status updates for running agents.
AI Platform & Backend Engineer
SignalFlow AI
04.2020 - 07.2022
- Architected a backend AI orchestration service in Python (FastAPI) and TypeScript to manage prompt templates, tools, agent states, and evaluation runs.
- Built multi-step workflow agents for document review, summarization, and ticket routing using LangChain, Celery/RQ workers, and Redis queues.
- Implemented document intelligence pipelines: ingestion, chunking, metadata tagging, embeddings generation, and retrieval, optimized for latency and relevance.
- Integrated OpenAI, Anthropic, and local models behind a unified internal API with rate limiting, caching, logging, and feature toggles.
- Collaborated with front-end engineers to expose agent workflows via Next.js/React interfaces, including admin tooling for monitoring and re-running failed jobs.
- Introduced structured logging, tracing, and performance metrics with Prometheus + Grafana, improving observability of model calls and tool executions.
Full Stack Engineer
BrightStack Systems
02.2019 - 03.2020
- I started my career as Intern engineer for half a year.
- Developed a multi-tenant SaaS platform using React, Node.js (Express), and PostgreSQL, later extending it with AI-assisted features (recommendations, summaries).
- Implemented an AI assistant module in Python that generated insights and summaries from user data, exposed via REST and consumed by the React front-end.
- Designed database schemas, query patterns, and caching strategies for analytics-heavy dashboards, including background jobs for aggregations and scheduled reports.
- Built authentication/authorization with JWT, role-based access control, and organization-level permission models.
- Containerized services with Docker, managed environments, and participated in migration of workloads to AWS (EC2, RDS, S3, CloudFront).
- Worked closely with product and design teams to translate vague “AI feature” ideas into concrete, technically feasible user stories and API contracts.
- BrightStack Systems is a company that specializes in AI infrastructure and data management solutions.
Education
Bachelor - Computer Science
University of Dayton
Dayton, Ohio01.2019
Skills
Python
PyTorch
OpenAI API
ChatGPT
LangChain
n8n
Nodejs
REST APIs
Microservices
Redis
GIS
Mapbox
Supabase
AWS
Docker
Git/GitHub
Timeline
AI Full-Stack & Agent Engineer
NovaStack Labs
06.2022 - 10.2025
AI Platform & Backend Engineer
SignalFlow AI
04.2020 - 07.2022
Full Stack Engineer
BrightStack Systems
02.2019 - 03.2020
Bachelor - Computer Science
University of Dayton
KEY ACHIEVEMENTS
- Over 50 projects, big and small. Completed. I already completed over 50 projects so far.
- Collaboration with teams. Working in a team motivates me to give 100% every day. Collective intelligence is the most powerful tool for companies.