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Xinpeng Cheng

@xinpeng

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Staff Software Engineer and AI Architect building scalable, cloud-native AI platforms and developer productivity tools.

United States

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What I'm looking for

I seek roles where I can lead AI-driven platform engineering, mentor cross-functional teams, deliver scalable production systems, and drive measurable business impact.

I am a Staff Software Engineer and AI Architect with 10+ years designing and scaling cloud-native platforms across AI, FinTech, healthcare, and retail automation. I blend full-stack engineering with AI to deliver production-grade systems that improve developer productivity and customer experiences.

At enterprise scale, I have led re-architectures, serverless migrations, and multi-agent LLM systems that cut deployment time, reduced manual effort, and achieved high availability. I have a proven track record building high-throughput APIs, observability, and IaC to support millions of daily transactions.

My work has driven large impact: reducing campaign deployment time by 85%, saving millions of developer hours through AI assistants, and improving conversion and engagement through AI-first commerce features. I emphasize reliability, security, and measurable outcomes in every program I lead.

Technically, I am proficient in Python, Go, Java, JavaScript/TypeScript, cloud platforms (AWS, Azure), Kubernetes, LangChain/LangGraph, vector search (Pinecone, OpenSearch, FAISS), and a broad ML/infra ecosystem. I enjoy mentoring teams and shaping roadmaps that align technical excellence with business value.

Experience

Work history, roles, and key accomplishments

Current

Tech Lead / Senior Software Engineer

Current

Walmart

May 2025 - Present (1 year 1 month)

Led re-architecture of Walmart’s AI-powered commerce and developer platforms, converting monolithic workflows to event-driven serverless microservices that reduced campaign deployment time by 85% and supported 20M+ daily transactions with <50 ms latency.

Python Django fastAPI AWS Lambda Terraform Kafka Redis PostgreSQL Pinecone

Senior Software Engineer

PayPal

Jul 2023 - Apr 2025 (1 year 9 months)

Contributed to PayPal’s Project Apollo and Paved Road initiatives by designing cloud-native GraphQL supergraphs and automation templates, improving query performance ~40% and reducing provisioning time from days to minutes.

TypeScript GraphQL Python Terraform OpenSearch Kubernetes Datadog

Full Stack Lead Engineer

Uber

Jul 2020 - Jun 2023 (2 years 11 months)

Led platform modernization and ML infrastructure evolution, integrating generative AI into Michelangelo and advancing deployment automation that improved ML-to-production velocity by ~40% and reduced cluster underutilization by 18%.

Go Python Kubernetes Spark Kafka TensorFlow PyTorch Prometheus Grafana

Full-Stack Engineer

Flatiron Health

Sep 2018 - Jun 2020 (1 year 9 months)

Built cloud-native oncology EHR services and a clinical trial matching engine using FHIR-compliant microservices, reducing report generation times by 28% and improving clinician decision efficiency by ~18%.

React PostgreSQL Redis Elasticsearch Docker Datadog FHIR D3.Js

Software Engineering Intern

Amazon

May 2018 - Aug 2018 (3 months)

Developed a real-time logistics monitoring dashboard and predictive maintenance prototypes, improving tracking efficiency by 15% and reducing environment setup time by ~90% through CI/CD automation.