Xuan – Python, AWS, DynamoDB, experts in Lemon.io

Xuan

From United States (UTC-7)flag

Back-end Web Developer

Xuan – Python, AWS, DynamoDB

Xuan is a senior backend engineer with 20 years of experience designing and delivering large-scale distributed systems, primarily using Python and AWS. He has led projects at JP Morgan, Meta, and Oracle, demonstrating strong architecture judgment in serverless, DynamoDB, EKS, and SQS-based systems. His strengths include platform-level thinking, operational ownership, and pragmatic handling of ambiguity. Communication is effective for remote collaboration, though sometimes fragmented.

Main technologies
Python
1 year
AWS
2 years
DynamoDB
1 year
PostgreSQL
1 year
AWS Lambda
1 year
Amazon SQS
1 year
Additional skills
Big Data
Direct hire
Possible
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Experience Highlights

Senior Principal Software Engineer
Sep 2025 - Ongoing1 year
Project Overview

Oracle Cloud Infrastructure (OCI) Building Software that scale Building Data Centers.

Responsibilities:
  • Modernized data-center build automation services onto cloud infrastructure.
  • Ran a weekly DevOps/RCA process and tracked follow-up actions to completion.
  • Built a CI/CD security-audit scanner using internal AI/ML tooling.
  • Worked spec-driven with AI coding agents, using AI code-review bots for first-pass review.
Project Tech stack:
Senior Lead Software Architect
Feb 2023 - Jul 20252 years 5 months
Project Overview

A global financial services firm providing investment banking, commercial banking, asset management and payment services.

Responsibilities:
  • Led a multi-party key-protection and signing system for an internal blockchain platform from concept to production.
  • Owned architecture and delivery of the platform's distributed key-management components.
Project Tech stack:
Blockchain
Cryptography
Software Engineer
Jan 2022 - Dec 202211 months
Project Overview

A technology company building social media, messaging and virtual reality products used by billions of people.

Responsibilities:
  • Built storage, indexing and caching services for on-chain NFT data serving ~5M DAU.
Project Tech stack:
Blockchain
Vice President, Technology & Architecture
Nov 2018 - Jan 20223 years 2 months
Project Overview

A global financial services firm providing investment banking, commercial banking, asset management and payment services.

Responsibilities:
  • Worked on a tokenization service.
  • Built an identity bridge mapping the internal OAuth 2.0-based authentication system to AWS IAM.
Project Tech stack:
AWS
OAuth

Education

2008
Distributed Computing, Grid, Divisible Load Theory, Realtime
PhD ABD
2001
Computer Science
Master's degree

Languages

English
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