Agentic AI Cloud Systems Software Engineer

Xiaofan Tong (Software engineer AND a magician)

+1-215-***-**** · **********@*****.*** · https://www.linkedin.com/in/xiaofantong/ Expert in designing and implementing large scale cloud/distributed systems, data pipeline and agentic AI technologies Side/Start-up Project i

AI Vibe Coding Platform Founding engineer Jun. 2024 - Feb. 2026

A five-person startup and built multi-repo platform (agentic AI, backend, frontend, container): LLM agent with plan/code phases, LiteLLM + OpenAI/Anthropic, streaming tool-calling; FastAPI backend with WebSocket + PostgreSQL

Owned end-to-end frontend and backend development, including AI agent coding and prompt design Tech stack: Python, FastAPI, React, Next.js, TypeScript, LiteLLM, WebSocket, PostgreSQL, E2B/ECS/Modal, Stripe, Supabase Work Experience i

Disney Languages used: Go, TypeScript, Java, Scala, Kotlin, Python Staff Software Engineer (L6): Ads Inventory Forecast Platform Apr. 2023 - present

Build and maintain highly scalable, resilient, responsive and data-intensive REST APIs using Java and Go

Led the design and delivery of a new AI system for forecasting Disney Ads Impressions using agentic AI technologies like: RAG, streaming, embedding and vector PostgreSQL

Developed a GraphQL service using Typescript. Use Kafka for stream data processing with containerization (Docker)

Tech stack: Microservices API, Kubernetes, AWS, SQL/noSQL, GraphQL, Kafka, Spark, Airflow, Azure, GCP, Docker DoorDash Inc. Languages used: Go, Java, Kotlin, Scala, Python, TypeScript(React) Staff Software Engineer (L6): New Merchant Experience Jan. 2022 - Mar. 2023

Led a five-engineer team in designing and delivering Go/Java gRPC and REST services and React/TypeScript applications for the New Merchant Experience platform.

Led building the Scala Spark inventory data pipeline to make sure accuracy of the non-restaurant inventory data

Tech stack: Kubernetes, AWS, PostgreSQL, Spark, Redis, Spring, CI/CD and DevOps tools Compass Inc. Languages used: Go, Java, Python, C++, TypeScript(React) Senior Software Engineer (L5): Data pipeline, Clouds Jan. 2020 - Jan. 2022

Built a next-generation data platform using Go, Python, and Java, reducing processing latency by 80% and error rates by 55%

Designed and implemented a media handler to handle large media files like pictures and videos by using Kafka for stream data

Tech lead for a 5 people team, manage projects, and lead interns and teammates

Tech stack: Kubernetes, AWS, NoSQL DB (DynamoDB), Kafka, Airflow, Spark, Redis, AWS Lambda, CI/CD tools Google Inc. Languages used: Java, C++, Go, TypeScript Senior Software Engineer (L4-L5): Unified Reseller Platform, GCP Oct. 2017 - Jan. 2020

Built a unified platform that helps distributors & resellers to resell Google Cloud products and monetize their offerings.

Tech Lead of implementing offers, which is the unit a distributors & resellers can purchase. Design and implement DB schema

(SQL and now migrated to non-SQL), Go API (based on Gorm, ORM library), Java API, and UI (Angular and TS).

Implement unit tests, integration tests, pressure tests and automate E2E tests. Software Engineer (L3-L4): DoubleClick Search, AdWords Sep. 2013 - Oct. 2017

DoubleClick Search is a search engine marketing (SEM) platform that helps ad agencies to manage search ad campaigns across many search ad networks (AdWords, MS Bing/adCenter, Yahoo, Yahoo Japan, Baidu).

E2E design and FE feature lead for bid multiplier, multi-login, tracking URLs and keywords automation, etc.

Designed and tested multiple production features by using Angular 2 and Typescript/Dart for FE and Java/C++ for BE Education i

University of Pennsylvania, MSE in Computer and Information Science GPA: 3.94/4.0 Sep. 2011 - May. 2013

Main Courses: Data Structure and Algorithms, Machine Learning, Database, Distributed System, Networked Systems Peking University, Bachelor’s Degree in Computer Science Major GPA: 3.7/4.0 Sep. 2007 - Jul. 2011

Main courses: Data Structure and Algorithm, Software Engineering, Web Technology, Operating Systems Peking University, Bachelor’s Degree in Economics (Dual Degree) Major GPA: 3.5/4.0 Sep. 2008 - Jul. 2011

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