Live backends in TypeScript, Python and Go

Hi, I'm Jay. I build production-grade web platforms.

From secure APIs and payments to polished, fast interfaces, with a live Lab that proves every skill against real backends.

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Skills, proven live

Every tile is a working demo

Not a list of logos: each skill links to a Lab panel that calls a real, deployed backend.

1. Checkout
2. Signed webhook
3. Order paid
Payments & webhooks
Server-priced checkout, signed webhooks, idempotent event processing.
StripeExpressPostgres
Open the Payments & webhooks demo in the Lab
Auth & security
argon2id, short-lived JWTs, rotating refresh tokens with theft detection.
joseargon2Redis
Open the Auth & security demo in the Lab
Polyglot services
The same contract in TypeScript, Python and Go, raced live.
ExpressFastAPIGo
Open the Polyglot services demo in the Lab
Rate limiting
Redis sliding windows with standard RateLimit headers.
RedisLua
Open the Rate limiting demo in the Lab
Caching
Cache-aside with instant invalidation. See HIT vs MISS latency.
RedisMongoDB
Open the Caching demo in the Lab
Data stores
Postgres, MongoDB and Redis, each where it fits best.
PostgresMongoDBRedis
Open the Data stores demo in the Lab
Frontend craft
Next.js App Router, typed APIs, accessible and fast by default.
Next.jsTypeScriptTailwind
Open the Frontend craft demo in the Lab

Selected work

Featured projects

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I'm open to full-stack roles and freelance work. Tell me what you are building.