An Xin

Senior Software Engineer

San Mateo, California, United States6 yrs 1 mo experience
AI EnabledAI ML Practitioner

Key Highlights

  • Led GenAI initiatives at Meta for ad systems.
  • Managed full application lifecycle at C3 AI.
  • Conducted advanced research in materials science.
Stackforce AI infers this person is a Software Engineer with expertise in AI-driven advertising technology and enterprise software development.

Contact

Skills

Core Skills

Software DevelopmentWeb Engineering

Other Skills

Python (Programming Language)KotlinGenAI API ExtensionsSoftware DesignJavaScriptData ModelingBackend ArchitectureSkill DevelopmentComputer SimulationsTeamworkMetric DevelopmentSoftware Systems EngineeringMySQLPHPTypeScript

Experience

6 yrs 1 mo
Total Experience
2 yrs
Average Tenure
1 yr 11 mos
Current Experience

Meta

Senior Software Engineer

Jun 2024Present · 1 yr 11 mos · Menlo Park, California, United States · On-site

  • Full-stack Android Tech Lead building Ads and AI-powered monetization systems across format ranking, ad delivery, product quality, and GenAI.
  • Led multiple GenAI initiatives applying LLMs to Ads products, developing an end-to-end understanding of the creative generation → ranking → monetization loop. Integrated GenAI outputs with ads ranking signals to improve downstream performance, and launched the first GenAI feature in Facebook Ads as project owner across both frontend and backend.
  • Own the Format Innovation and Quality & Craft workstreams for the team, defining strategy, roadmap, execution pipeline, and success metrics. Built Quality & Craft from the ground up into a high-impact initiative that improves product quality, engineering excellence, and user experience.
  • Drive signal-based cross-session monetization by leveraging ad supply systems, experimentation, and user signals to reduce unmonetized sessions. Contribute to format ranking and ad delivery improvements to optimize overall ad performance.
  • Own A/B test technical review for the team, ensuring high-quality measurement, sound experimental design, and data-driven decision-making.
Python (Programming Language)KotlinSoftware DevelopmentWeb Engineering

C3 ai

Software Engineer

Aug 2021Jun 2024 · 2 yrs 10 mos · Redwood City, California, United States · On-site

  • Full-stack Application Owner responsible for end-to-end system design and delivery, including data modeling, backend architecture, metric definition, and frontend implementation.
  • Owned the full application lifecycle, including data model design, RESTful API architecture, backend implementation, and frontend development using React, with customized UI components and advanced data visualizations. Designed and defined product metrics, evaluation frameworks, and key data structures to support product and decision-making needs.
  • Led cross-functional collaboration with Product Managers, UI/UX Designers, Data Scientists, QA, and Forward Deployed Engineers to translate product requirements into scalable technical solutions. Reviewed system specifications and UI/UX designs to ensure technical feasibility and product consistency.
  • Acted as Application Team Leader, coordinating execution, managing delivery quality, and mentoring new hires and interns on technical development and career growth.
JavaScriptPython (Programming Language)Software DevelopmentWeb Engineering

University of southern california

3 roles

Graduate Student

Jan 2020May 2021 · 1 yr 4 mos

  • Identification Hotel Reviews Based on Naïve Bayes and Perceptron Classifiers
  • Implemented a Naïve Bayes classifier and perception classifiers (including vanilla and averaged) to identify hotel reviews as either truthful or deceptive, and either positive or negative.
  • Part-of-speech Tagger for Different Languages based on a Hidden Markov Model
  • Constructed a part-of-speech tagger based on HMM to add tags for Italian, Japanese, and an unknown language.
  • Chinese Bert-based Task Oriented Dialogue System
  • Built a Bert-based task-oriented dialogue system, which is a dialogue assistant for flight and restaurant reservation in Chinese. Fine-tuned the intent classification and slot filling with Bert-pretrained language model with PyTorch.
  • AI Searching Agent for “Time Travelling” Problem
  • Developed an AI agent to search for the optimal and shortest path and navigate through a complex time-travelling configuration. The problem was solved with: BFS, UCS, and A* search.
  • AI Agent for Little-go Gaming
  • Developed an AI agent to play a small version of the Go game, a reduced board size of Go game, based on no-suicide and KO rules. Both game playing and reinforcement learning algorithms were tried to improve the winning percentage.
  • Hand-written Digits Classifier based on a Multi-layer Perceptron Neural Network
  • Constructed a multi-layer perceptron (MLP) neural network and used it to classify hand-written digit with no existing machine learning libraries.
  • Stock-searching Web and Mobile Applications
  • Implemented the backend using Python Flask deployed on GCP. Developed a stock-searching web application and a mobile application on iOS system.
  • Grain Tracking based on Highly Parallel DBSCAN
  • Simulated the sintering processes of aluminum nitride nano powders based on parallel molecular dynamics. The output data is further analyzed using a parallel DBSCAN technique.
Skill Development

Teaching Assistant

Jan 2020Dec 2020 · 11 mos

  • Teaching Assistant for Finite Element Analysis (Graduate Course) and Mechanics of Deformable Bodies (Undergraduate Course); held the lab class and discussion session independently; supervised students with their homework problems.
Skill DevelopmentTeamwork

Research Assistant

Aug 2017Jul 2021 · 3 yrs 11 mos

  • Mineralization-induced Self-reinforcement Hydrogel
  • Manufactured UV curable hydrogel; attached enzyme inside the polymer network; carried out theoretical and experimental study on the biomineralization-induced enhancement of hydrogel.
  • Growing Living Composites with 3D-printed Ordered Microstructures
  • Presented a methodology to manufacture bionic mineralized composites by harnessing guided bio-mineralization within 3D-printed highly ordered polymer scaffold. Highlighted an exciting opportunity for future bionic composite materials by tailoring interactions between living organisms and 3D-printed synthetic materials.
  • Bone-inspired Healing of 3D-Printed Ceramics
  • Conducted experiments on autonomous healing of 3D-printed porous polymer-derived ceramics with carbonate-precipitating bacteria; Observed good mechanical behavior as well as thermal and chemical resistance on the healed interfaces of ceramics; Performed a theoretical study to understand his healing mechanism.
  • Study on Mechanical Behaviors of Electrophoresis induced Hydrogel Adhesion
  • Project Sponsored by Air Force Office of Scientific Research Young Investigator Program
  • Established an analytical theory framework to model the electrophoresis-induced reversible adhesion; Obtained good agreements between the theoretical results and the experimental results for both electrophoresis-induced hydrogel adhesion and adhesion releasing.
  • Study on Extracellular Matrix of Pancreatic Tissue
  • Modeled 3D elastomeric structures using Nonlinear Finite Element Analysis (FEA) to study the bio-mechanical response and buckling behavior of the resected pancreatic tissues (soft materials).
Skill DevelopmentComputer Simulations

Beihang university

Research Assistant

Sep 2014Jan 2017 · 2 yrs 4 mos · Beijing, China · On-site

  • Study of Fastener Effect on Composite (CFRP) Bolted Joints
  • Built a progressive damage models based on FEA with ABAQUS/UMAT to investigate the mechanical behaviors (especially secondary bending and failure mode effectiveness) in bolted composite joints.
  • Key Techniques of Composite Structure Design and Analysis
  • Project Sponsored by Commercial Aircraft Corporation of China, Ltd. (COMAC)
  • Summarized Fatigue Characteristics Analysis and Test Methods in Metal/Composite Hybrid Joints; Conducted static and fatigue tests on metal/composite hybrid joints and structures through Instron based on ASTM.
Skill DevelopmentComputer Simulations

Education

University of Southern California

Doctor of Philosophy - PhD — Civil Engineering

Jan 2017Jan 2022

University of Southern California

Master's degree — Computer Science

Jan 2020Jan 2021

Beihang University

Master's degree

Jan 2014Jan 2017

Beihang University

Bachelor's degree

Jan 2010Jan 2014

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