Wcowin · Kewen Wang

Backend systems,
architected to last.

Elite backend developer, AI model architect, and systems architect. I design the infrastructure that payments, data, and intelligence run on - and ship the macOS tools I wish existed.

Available·Open to architecture & build work
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Capabilities

Systems architecture

Service boundaries, data flow, and failure modes designed up front - so systems scale without rewrites.

AI model architecture

Designing and wiring model pipelines into production - inference, evaluation, and the plumbing around them.

Payments & blockchain

Stripe integrations and on-chain settlement (TRC20 / C2C) with reconciliation that actually balances.

Data infrastructure

PostgreSQL, MySQL, and Redis - schema design, query tuning, and caching layers built to hold up.

Engineering workflows

GitHub Actions and CI/CD that keep teams shipping - automated checks, releases, and clean history.

Performance

Profiling, batching, and back-pressure - finding the bottleneck before it finds production.

BackendAI / MLStripe APITRC20C2CPostgreSQLMySQLRedisGitHub Actions
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Featured work

OneClip⌘⇧V
{ }const client = createClient({ url, authToken })now
https://oneclip.cloud/changelog2m
AaTRC20 settlement reconciliation notes14m
Screenshot 2026-06-19 at 09.41.png1h

OneClip

macOS · Clipboard manager

oneclip.cloud

A professional clipboard manager for macOS. Every copy is kept, searchable, and one keystroke away - text, links, images, and code snippets, organized so the thing you copied an hour ago is never lost. Built for people who live in the keyboard.

Instant historyFull-text searchKeyboard-firstCode-aware
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Also building

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Elsewhere

© 2026 Kewen Wang. Designed and built end to end.