Xiaoyong (Tony) Xu
Staff Software Engineer · Platform Engineer

Engineering platforms that deliver at scale.

I build backend platforms, release systems, and cloud infrastructure for high-volume logistics — spanning serverless services, cross-border shipping, deployment automation, and production reliability. Currently at UniUni, working across URP backend systems, blue-green releases, and uniuni.com web tracking infrastructure.

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About Me

I'm a staff software engineer and platform engineer who builds systems that move real things — packages, payments, carrier integrations — across borders and at scale. My work spans backend platforms, release workflows, cloud infrastructure, and production reliability.

At UniUni, I work across URP backend engineering and platform reliability: serverless AWS Lambda services, cross-border shipping automation, merchant webhooks, campaign systems, blue-green releases, Terraform/Terragrunt infrastructure review, and uniuni.com web tracking separation. Before that, I built inventory orchestration and event-driven systems for high-traffic e-commerce at Orium.

My strongest work sits where application architecture meets operations: designing reliable APIs, debugging cross-service failures, hardening deployment workflows, and turning fragile manual processes into repeatable engineering systems.

7+
Years in Production Systems
2
Countries in Release Scope
3
Cloud Platforms Operated

Core Technologies

AWSTerraformAmazon EKSDockerAmazon ECRTypeScriptNode.jsAWS LambdaPrismaZodCloudFrontRoute 53CloudWatchCI/CDBashKubernetesKafkaGCPReactClaude CodeCodex

Work Experience

Staff Software Engineer / Platform Engineer

UniUni (Uni Express Inc.)
Apr 2026 — Present

Deployment & Reliability Automation

  • Supported production and standby deployments across U.S. and Canada environments using internal shell-script-based blue-green release workflows.
  • Debugged release failures involving ECR authentication, Docker multi-arch manifests, ASG standby scale-up, release-comment automation, tag parsing, and environment-specific config paths.
  • Created and hardened deployment SOPs, service mapping references, release-comment tooling, standby scale-up workflows, and operational runbooks to reduce release risk and tribal knowledge.

uniuni.com & Web Tracking Infrastructure

  • Reviewed the infrastructure separation of public shipment tracking traffic from the WordPress-based uniuni.com site toward a dedicated tracking.uniuni.com platform.
  • Validated EKS, ALB, CloudFront, Route 53, IAM, CloudWatch, Terraform/Terragrunt, DNS, ACM certificate, and Next.js static-routing risks before go-live.

Production Operations

  • Investigated production infrastructure issues across EC2, Docker containers, RabbitMQ, DNS, SSL, ALB, CloudFront, EKS, IAM, SQS, and CloudWatch access patterns.
  • Coordinated deployment readiness and infrastructure handoffs across DevOps, application teams, vendors, and business stakeholders.

AI-Augmented Engineering

  • Use Claude Code, Codex, and Gemini as practical engineering tools for planning, debugging, code review, documentation, and rapid prototyping.

Senior Software Developer

UniUni (Uni Express Inc.)
Dec 2025 — Apr 2026

Uni Retail Platform (URP)

  • Built and scaled backend services for URP across shipments, payments, carrier integrations, merchant webhooks, campaign automation, cross-border shipping, and analytics.
  • Delivered merchant-facing APIs with AWS Lambda, TypeScript, Prisma, and Zod, improving validation, API contract clarity, and service evolution across platform boundaries.

Cross-Border & Logistics

  • Supported the U.S. cross-border soft launch with HTS-based duty automation, tariff transparency, and pickup/serviceability logic across U.S. and Canada shipment flows.
  • Helped enable Delivered Duty Paid shipping so merchants and buyers could see landed costs upfront before cross-border delivery.

Campaigns, Webhooks & Analytics

  • Contributed to the marketing campaign MVP with backend business logic, event-driven payment-method triggers, referral workflows, and campaign automation foundations.
  • Built merchant-facing webhook self-service flows and migrated configuration away from AWS Secrets Manager fallback logic toward a DB-driven model with stronger auth validation and HTTPS enforcement.
  • Improved analytics and internal operations tooling by resolving KPI discrepancies end to end, expanding reporting APIs, and reducing reliance on manual Retool workflows.

Production Debugging

  • Investigated and fixed production issues across Lambda, Prisma, ShipStation, webhook delivery flows, and analytics data paths.

Senior Software Engineer

Orium / Myplanet
2021 — 2025
  • Designed and shipped a dedicated inventory microservice (Kafka → CommerceTools) replacing a brittle Cloud Function chain — eliminated inventory mismatches with 0 incidents on Black Friday.
  • Built order-event orchestration middleware on Kafka that sequences updates to CommerceTools, resolving concurrent update conflicts and eliminating Narvar email mismatches.
  • Led production integration of Bold Commerce headless checkout (beta API) with modular adapters and fault-tolerant fallbacks — launched with zero downtime.
  • Led migration from IBM Cloud to GCP: rewrote serverless functions, migrated services to GKE, and introduced CI/CD (GitHub Actions / Cloud Build), cutting deployment-related incidents by ~50%.
  • Improved backend reliability by adding short-term caching and refactoring grouped MongoDB updates, solving Kafka offset lag and Cloud Function timeouts during peak load.
  • Resolved data-sync race conditions for a Jesta → Kafka connector by introducing staggered query intervals and a next-day reconciliation job.

Software Developer & Team Lead

Convergence Concept Inc.
2019 — 2021
  • Led engineering and contributed across the stack on a real-time affiliate marketing platform for banks and fintechs, focusing on event-driven tracking, reporting pipelines, and AWS infrastructure (Lambda, EC2, MongoDB, Auth0).
  • Designed modular, testable flows for affiliate tracking and financial event processing. The platform was adopted by major clients and won two FinXTech Awards, including Best Solution for Revenue Growth.

Featured Projects

Production systems I've built and owned — backend, platform, and infrastructure.

Uni Retail Platform (URP)

Merchant-facing logistics SaaS platform spanning shipments, payments, carrier integrations, webhooks, campaign automation, cross-border shipping, and analytics.

TypeScriptNode.jsAWS LambdaPrismaZodWebhooksEvent-Driven ArchitectureCross-Border Shipping

uniuni.com Infrastructure & Web Tracking Separation

Infrastructure separation project moving public shipment tracking traffic away from the WordPress-based uniuni.com site toward a dedicated tracking platform.

AWSAmazon EKSCloudFrontALBRoute 53TerraformTerragruntIAM
03

Deployment & Reliability Automation

Production and standby release workflows for UniUni services across U.S. and Canada environments, focused on safer blue-green operations.

AWSAmazon ECRDockerBashCI/CDRelease EngineeringIncident Response

Tropical Daydream — E-Commerce Store

Full-stack e-commerce plant store built from scratch using AI-augmented vibe coding. Serverless AWS SAM backend with React + Tailwind frontend, Stripe payments, and admin dashboard.

ReactTypeScriptAWS SAMDynamoDBS3StripeTailwind CSS

Harry Rosen (E-Commerce Platform)

Played a core role as a senior backend engineer, driving architectural decisions, service migrations, and reliability improvements in a production-critical environment.

GCPKubernetesKafkaMongoDBNode.jsTypeScriptTerraformAmplienceCommerceToolsAlgolia

Headless Checkout (Bold Commerce)

Integrated Bold Commerce headless checkout (beta) with modular adapters and fallbacks for a mobile-first checkout experience.

Bold CommerceJavaScriptReactNext.jsTypeScriptChakra UI

Shopfinalcut

Launched a new outlet store reusing core services with feature flags, shipping, and subtotal/discount adjustments.

Node.jsCommerceToolsFeature Flags

FintelConnect — Affiliate Platform

Frontend lead + full-stack contributor for a real-time affiliate marketing platform adopted by banks and fintechs.

ReactAWSMongoDBAuth0GraphQLNode.jsTypeScript

Eventer (Full-Stack)

Group project for an outdoor events management system using Google APIs and Open-Weather API.

ReactNodeJSJavaScriptGoogle Maps APIOpenWeather API

Jungle (E-commerce)

Implemented core e-commerce features including Sold Out badges, Admin Categories, and User Auth.

Ruby on RailsPostgreSQLStripe

ChattyApp

A multi-user real-time communication app built with React and WebSockets.

ReactWebSocketsNode.jsWebpack

Wordle Game

A modern, full-stack implementation of the popular word-guessing game with real-time multiplayer and 'cheating' modes.

ReactTypeScriptNode.jsExpressWebSocketsViteTurbo
13

Charity (IOS Mobile App)

Collaborated on a mental health mobile app offering anxiety treatment plans and mini-games.

XcodeSwift
14

Bidfy — MVP Delivery

Delivered an MVP (RSS feed + AWS Lambda + DynamoDB) quickly to validate market response in 3 sprints.

AWS LambdaDynamoDBRSS

Let's Connect

I'm open to Senior / Platform Engineer roles and technical leadership opportunities. If you're building something complex at scale, I'd like to hear about it.