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I'm a Senior Software Engineer with 11 years of experience delivering scalable, cloud-native applications across startups and enterprise environments. I specialize in backend, frontend, DevOps, and AI-driven systems, using Python, Ruby on Rails, Java, React.js, FastAPI, Kubernetes, and AWS to build secure, high-performance solutions. I've led cross-functional teams to ship mission-critical products in health care, data science, and fintech, driving better reliability, user experience, and business results. I value collaboration, clean architecture, and measurable outcomes.…I'm a Senior Software Engineer with 11 years of experience delivering scalable, cloud-native applications across startups and enterprise environments. I specialize in backend, frontend, DevOps, and AI-driven systems, using Python, Ruby on Rails, Java, React.js, FastAPI, Kubernetes, and AWS to build secure, high-performance solutions. I've led cross-functional teams to ship mission-critical products in health care, data science, and fintech, driving better reliability, user experience, and business results. I value collaboration, clean architecture, and measurable outcomes.

Xun Zhu

Full Stack Developer, AI Engineer, Data Scientist, +2

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I'm a Senior Software Engineer with 11 years of experience delivering scalable, cloud-native applications across startups and enterprise environments. I specialize in backend, frontend, DevOps, and AI-driven systems, using Python, Ruby on Rails, Java, React.js, FastAPI, Kubernetes, and AWS to build secure, high-performance solutions. I've led cross-functional teams to ship mission-critical products in health care, data science, and fintech, driving better reliability, user experience, and business results. I value collaboration, clean architecture, and measurable outcomes.…I'm a Senior Software Engineer with 11 years of experience delivering scalable, cloud-native applications across startups and enterprise environments. I specialize in backend, frontend, DevOps, and AI-driven systems, using Python, Ruby on Rails, Java, React.js, FastAPI, Kubernetes, and AWS to build secure, high-performance solutions. I've led cross-functional teams to ship mission-critical products in health care, data science, and fintech, driving better reliability, user experience, and business results. I value collaboration, clean architecture, and measurable outcomes.

Available to hire

I’m a Senior Software Engineer with 11 years of experience delivering scalable, cloud-native applications across startups and enterprise environments. I specialize in backend, frontend, DevOps, and AI-driven systems, using Python, Ruby on Rails, Java, React.js, FastAPI, Kubernetes, and AWS to build secure, high-performance solutions.

I’ve led cross-functional teams to ship mission-critical products in health care, data science, and fintech, driving better reliability, user experience, and business results. I value collaboration, clean architecture, and measurable outcomes.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Senior AI Engineer at Aledade

November 1, 2024 - Present

Designed and delivered core modules of Aledade’s population-health platform, supporting 2,000+ practitioners and 2.8M patient records under HIPAA/SOC-2 compliance. Built a FHIR-based ingestion gateway using Python FastAPI, Kafka, and Snowflake, processing 500M+ events per month from 20+ EHR vendors. Migrated batch ETL to real-time AWS Kinesis streaming, cutting data latency from 2 hours to 15 minutes and recovering $8M/year in shared savings. Developed internal dashboards using React and Ruby on Rails APIs for data access and performance analytics. Integrated LLM-powered RAG assistant using Snowflake Cortex + LangChain, increasing coding accuracy by 12%. Implemented OpenTelemetry and DataDog dashboards, reducing MTTD by 60% and MTTR by 55%. Automated CI/CD pipelines with GitHub Actions, achieving 90% coverage and zero-downtime deployments. Mentored six engineers on system design, observability, and API architecture, promoting two mid-level roles.

Senior AI Engineer at Aledade

October 1, 2024 - October 20, 2025

Led AI initiatives integrating LLMs and RAG pipelines into Aledade’s health care platform to automate clinical insights. Engineered Scala, C#, and Ruby on Rails microservices to support data access, workflow automation, and user management. Implemented vector search with Pinecone and Redis enabling fast and accurate retrieval of clinical data. Set up DataDog dashboards and OpenTelemetry tracing for AI observability and performance. Partnered with data science and compliance teams to meet HIPAA and SOC-2 requirements. Refined prompts, embeddings, and model selection to improve reliability and latency.

Senior Full Stack Engineer at Broad Institute

July 1, 2023 - October 20, 2025

Built Terra, a cloud-native platform managing 80 PB of biomedical data and millions of workflows. Engineered Scala and C# microservices to support multi-cloud compute environments (GCP/Azure VMs, GKE/AKS) with Jupyter Docker images. Designed and tested multi-cloud data tenancy and dynamic bursting across GCP and AWS. Improved CI/CD pipelines using GitHub Actions, Jenkins, Terraform, increasing deployment reliability and release velocity. Modeled relational schemas in SQL to manage user environments, storage quotas, and metadata integrity. Refactored frontend architecture using Vue.js and TypeScript, implementing modular API-layer components to accelerate feature delivery. Led JavaScript → TypeScript migration (~70% conversion), improving test accuracy and maintainability. Expanded analytics tools integrating R Studio, Galaxy, and UCSC Genome Browser, enabling data analytics flexibility for research teams.

Senior Full Stack Engineer at UnitedHealth Group

March 1, 2019 - October 20, 2025

Led an 8-member Scrum team modernizing benefits-info systems, raising NPS by 18 points. Built full-stack applications using React and Go, enabling real-time insurance lookup and reducing average call-handling time. Designed an ETL pipeline using Java and Jenkins to convert terabytes of Word docs into MarkLogic NoSQL with keyword indexing. Deployed services on Kubernetes (EKS) using Terraform and blue-green releases. Defined HA/DR topologies with multi-node clustering and auto-scaling to handle 10K+ concurrent users.

Software Engineer at Endicia

August 1, 2015 - October 20, 2025

Built a Java microservice emulating the USPS Shipping API on-prem, boosting high-volume parcel processing performance by 100x. Tuned the JVM and Spring MVC threads to reduce latency from 100ms to 1ms. Developed rule-driven services using JBoss Drools, Jetty, and NGINX for dynamic workflow automation. Scaled production workloads to handle 50–200 requests/sec with zero-downtime deployments on AWS EC2.