Joseph Zhang
Joseph Zhang

Staff Full Stack AI Engineer

Actively looking · Member since 19 Oct 2026
Location
Naperville, United States
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Contract
Experience level
Senior

About

Professional summary

I am a Staff Full Stack AI Engineer with extensive experience building enterprise web platforms, cloud services, data pipelines, and AI-enabled products. I specialize in delivering scalable, maintainable systems across frontend, backend, data, and infrastructure layers.

I have led modernization of multi-tenant commerce platforms, designing reliable APIs, modular service architectures, operational dashboards, and automated data workflows. My work emphasizes performance, observability, security, data quality, and practical operational value.

I build production Retrieval-Augmented Generation systems and semantic search experiences, including document ingestion, chunking, embeddings, vector retrieval, grounded responses, evaluation workflows, and human review capabilities. I focus on making AI systems measurable, traceable, and useful in real business processes.

My core stack includes React, TypeScript, Python, .NET, Java, Node.js, AWS, SQL, and containerized cloud deployments. I am experienced with REST and GraphQL APIs, microservices, event-driven processing, CI/CD, Kubernetes, and distributed data systems.

I enjoy leading technical design, mentoring engineers, reviewing code, resolving production issues, and collaborating with product, operations, support, and business stakeholders. I translate ambiguous requirements into incremental, reliable solutions that improve efficiency and customer outcomes.

Skills

78 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Staff Software Engineer Esperanto Commerce

Lead modernization of a multi-tenant commerce and analytics platform used by internal operators, external clients, support teams, and partner systems. Own full-stack delivery across React and TypeScript interfaces, Python and Node.js API services, PostgreSQL data models, AWS infrastructure, CI/CD, monitoring, production debugging, and stakeholder communication.

Architected modular .NET 8 services and ASP.NET Core REST/OData endpoints for order, catalog, account, reporting, inventory, fulfillment, and partner synchronization workflows. Built secure Java/Spring Boot microservices, event and batch pipelines using Kafka, Redis, PostgreSQL, and AWS services, and AI-assisted operational investigation workflows using contextual retrieval. Improved API response time by approximately 35%, strengthened reliability through validation, retries, idempotency, logging, alerts, and runbooks, and mentored engineers on architecture, testing, observability, and AI-assisted development.

Senior Software Engineer Quantiphi

Led full-stack delivery for AI-enabled enterprise platforms using React, TypeScript, Python, FastAPI, Node.js, and Java. Delivered reusable UI components, REST and GraphQL APIs, document intelligence workflows, annotation and review interfaces, data pipelines, cloud delivery, and client-facing technical communication across AWS, GCP, and Azure.

Built production RAG and semantic search solutions that ingested documents and enterprise records, extracted and chunked content, generated embeddings, indexed metadata, and returned grounded answers with source references. Developed AI quality monitoring, validation utilities, background workers, and ML analytics workflows with Pandas, NumPy, scikit-learn, and XGBoost. Reduced manual review time by 40% through review workflows and mentored engineers on service boundaries, prompt tracking, testing, SQL performance, and AI/ML tradeoffs.

Senior Software Engineer / Software Engineer Microsoft

Built enterprise platform and productivity systems across frontend, backend, data access, automated testing, cloud services, telemetry, reporting, workflow automation, and production support. Developed full-stack applications and internal operational tools using React, Angular, TypeScript, JavaScript, Java, C#, ASP.NET Core, Node.js, Python, REST APIs, SQL Server, Azure, and AWS services.

Designed maintainable service abstractions, API contracts, authorization and validation patterns, database access layers, and serverless workflow systems using AWS Lambda, API Gateway, DynamoDB, S3, CloudWatch, IAM, SQS, SNS, and EventBridge. Improved SQL performance, release quality, monitoring, CI/CD checks, and incident response. Supported Docker and Kubernetes deployments with health checks, rolling releases, dashboards, alerting, and rollback-safe delivery.

Education

Learning history

Washington University in St. Louis

Master's Degree, Computer Science

Master's Degree in Computer Science.

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