kevin@resume:~$ whoami

Kevin Wang_

Senior Backend / Systems / Integration Engineer

Backend, systems, and integration engineer with 13+ years of experience taking over real production systems, defining boundaries between services and vendors, and turning messy workflows into reliable software.

{
  "location": "Taiwan",
  "remote": true,
  "focus": [
    "backend",
    "integration",
    "reliability"
  ]
}

kevin@resume:~$ metrics --summary

13+Years building production systems
1M+Push notifications / day
50K+SMS deliveries / day
5SMS provider integrations
DozensPatchGrid users

kevin@resume:~$ experience --timeline

2020 — Present

Blockchain Systems Development Engineer

Quande Information Technology

Own and evolve existing production systems spanning customer operations, messaging, integrations, data, deployment, and reliability.

  • Operate a notification platform delivering 1M+ push notifications and 50K+ SMS messages per day across five SMS providers.
  • Own a customer-operations platform deployed to Azure Web App with VM and SQL-backed services; improved a 12-tab user view from blocking full-page loading to independently loaded and refreshable tabs.
  • Use application-side revalidation plus downstream state checks for operations that mutate external system state.
  • Maintain C#/.NET and SQL Server services across Azure and IIS, with production monitoring through Application Insights.
C#.NETSQL ServerAzure Web AppDapperIISApplication Insights
Previous role · ~5 years

Software Engineer

Education Budget & Accounting Platform

Maintained and evolved a long-lived budgeting and accounting platform serving 3,300+ schools and roughly 15,000 users.

  • Evolved .NET Framework / SQL Server production workflows while preserving compatibility with older fiscal-year data.
  • Introduced new fields incrementally rather than forcing incompatible schema assumptions onto historical records.
  • Supported decision-period aggregation by moving shared summary work to overnight processing when many schools needed the same calculations in a short window.
  • Owned production maintenance, reporting, SQL troubleshooting, and ongoing business-rule changes.
.NET FrameworkSQL ServerIISReportingLegacy evolution
Earlier career

Software Engineer

Duty-free Retail Incentive Platform

Designed the ETL pipeline and co-designed the backend calculation model for a multi-store incentive-calculation system.

  • Designed Oracle-to-SQL Server ETL flows for data from roughly 6–7 high-volume retail stores.
  • Handled incomplete records, encoding problems, invalid characters, failed records, and orphan data with explicit classification and replay paths.
  • Implemented complex incentive rules varying by store, product category, team, and specific products.
  • Replaced extensive manual report cross-referencing with system calculation so HR could focus on validation.
OracleSQL ServerSSISStored ProceduresETL

kevin@resume:~$ skills --group all

backend

+ C#

+ .NET / ASP.NET

+ Web APIs

+ Dapper

+ SSE

+ Background processing

data

+ SQL Server

+ Oracle

+ Query optimization

+ ETL / SSIS

+ Data modeling

+ Reporting

cloud_&_ops

+ Azure App Service

+ Azure Blob Storage

+ Azure SQL

+ Application Insights

+ IIS

+ Production monitoring

integration

+ Third-party APIs

+ Messaging providers

+ Modbus TCP

+ Protocol integration

+ Retry & state handling

+ System boundaries

ai-assisted_delivery

+ Problem framing

+ Architecture & contracts

+ Grill → spec → tickets

+ AI-assisted implementation

+ Code review

+ Acceptance & verification

kevin@resume:~$ projects --featured

[Live system]

PatchGrid

Production Monitoring & Delivery Platform

A production system for scheduled and real-time monitoring, operational visibility, and delivery tracking. Used as an ongoing modernization project and portfolio case study.

./open_case_study →
[Delivery project]

MSAR / ITRI

AI + GIS Search & Rescue Workflow

A modular search-and-rescue workflow coordinating GIS inputs, AI inference, expert rules, route analysis, post-processing, and delivery outputs under real project constraints.

./open_case_study →
[Production]

Messaging Platform

Multi-provider Notification Delivery

High-volume push and SMS delivery with multiple providers, configurable routing, retry behavior, delivery states, and operational monitoring.

./open_case_study →

kevin@resume:~$ next

Read the portfolio for architecture, constraints, operational details, and trade-offs.

open /portfolio →