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

kevin@resume:~$ experience --timeline

2020 — Present

Senior Backend / Systems Engineer

official_title: 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; changed a blocking 12-tab user view into 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.
Moved shared summary work to overnight processing when many schools needed the same calculations in a short decision window.

.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 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.
Automated complex incentive calculations so HR could focus on validating results instead of manually cross-referencing reports.

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

[Owned Product · Production · Dozens of users]

PatchGrid

Live-event file delivery and coordination

Born from a real live-production problem: teams exchanging console and show files through filenames, dates, and version suffixes with no clear authoritative copy. PatchGrid is now a production SaaS used by dozens of users.

./open_case_study →

[Client Delivery · Delivered system]

MSAR V2 / ITRI

Computation orchestration across multiple teams

An integration layer connecting frontend requests, DB APIs, frequently changing computation modules, result artifacts, and persistence. The architecture isolates team-owned code behind explicit execution boundaries.

./open_case_study →

[Professional · Production]

Messaging Platform

High-volume multi-provider notification delivery

Production push and SMS delivery handling 1M+ push notifications and 50K+ SMS messages per day, with five SMS providers, retry behavior, delivery-state tracking, and operational troubleshooting.

./open_case_study →

kevin@resume:~$ next

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

open /portfolio →