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Full Stack Developer with production experience building and shipping AI-powered SaaS products end to end—from concept to deployment. I build and deliver features across the stack (Node.js/NestJS, REST APIs, Next.js, MongoDB/PostgreSQL, Stripe billing, multi-tenant auth) and integrate AI capabilities via OpenAI and Anthropic APIs. I’ve shipped multiple commercial products from 0→1 for early-stage clients, owning architecture, backend, and frontend from greenfield to MVP. I’m comfortable owning a feature end to end (DB schema to cloud deployment), working independently with clean documentation and smooth handover.…Full Stack Developer with production experience building and shipping AI-powered SaaS products end to end—from concept to deployment. I build and deliver features across the stack (Node.js/NestJS, REST APIs, Next.js, MongoDB/PostgreSQL, Stripe billing, multi-tenant auth) and integrate AI capabilities via OpenAI and Anthropic APIs. I’ve shipped multiple commercial products from 0→1 for early-stage clients, owning architecture, backend, and frontend from greenfield to MVP. I’m comfortable owning a feature end to end (DB schema to cloud deployment), working independently with clean documentation and smooth handover.

Carlo Jin

Full Stack Developer, Back-End Developer, Front-End Developer, +2

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Full Stack Developer with production experience building and shipping AI-powered SaaS products end to end—from concept to deployment. I build and deliver features across the stack (Node.js/NestJS, REST APIs, Next.js, MongoDB/PostgreSQL, Stripe billing, multi-tenant auth) and integrate AI capabilities via OpenAI and Anthropic APIs. I’ve shipped multiple commercial products from 0→1 for early-stage clients, owning architecture, backend, and frontend from greenfield to MVP. I’m comfortable owning a feature end to end (DB schema to cloud deployment), working independently with clean documentation and smooth handover.…Full Stack Developer with production experience building and shipping AI-powered SaaS products end to end—from concept to deployment. I build and deliver features across the stack (Node.js/NestJS, REST APIs, Next.js, MongoDB/PostgreSQL, Stripe billing, multi-tenant auth) and integrate AI capabilities via OpenAI and Anthropic APIs. I’ve shipped multiple commercial products from 0→1 for early-stage clients, owning architecture, backend, and frontend from greenfield to MVP. I’m comfortable owning a feature end to end (DB schema to cloud deployment), working independently with clean documentation and smooth handover.

Available to hire

Full Stack Developer with production experience building and shipping AI-powered SaaS products end to end—from concept to deployment. I build and deliver features across the stack (Node.js/NestJS, REST APIs, Next.js, MongoDB/PostgreSQL, Stripe billing, multi-tenant auth) and integrate AI capabilities via OpenAI and Anthropic APIs.

I’ve shipped multiple commercial products from 0→1 for early-stage clients, owning architecture, backend, and frontend from greenfield to MVP. I’m comfortable owning a feature end to end (DB schema to cloud deployment), working independently with clean documentation and smooth handover.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Advanced

Chinese

Intermediate

Work Experience

Full Stack Developer at Jobpin AI (jobpin.ai)

October 1, 2025 - June 1, 2026

Production multi-tenant AI SaaS work (resume parsing, job matching, AI coaching) across the stack: NestJS/Node backend, Next.js 15 frontend, MongoDB/PostgreSQL data modeling, Stripe subscriptions, JWT multi-role auth with an admin dashboard, and AI integration via OpenAI/Anthropic.

Contract Developer (Full Stack) at Jobpin AI (jobpin.ai) / Contract role listed in resume

May 1, 2023 - October 1, 2024

Resume text lists a period that includes multiple engagements (including a section where “Contract” appears). Responsibilities described in the resume align with end-to-end full stack delivery for the Jobpin AI platform, including backend (NestJS/Node.js), frontend (Next.js/React), Stripe billing integrations, AI/LLM streaming and reliability improvements, async queue-based pipelines, and deployments via AWS/Pulumi.

Full Stack Developer at Jobpin AI (jobpin.ai)

January 1, 2022 - October 1, 2024

Delivered end-to-end features for a production multi-tenant AI SaaS platform covering resume parsing, job matching, and AI career coaching. Built backend modules across user/profile management, job matching, subscriptions/credits, and multi-tenant enterprise team roles using Node.js/Express and NestJS with JWT guards, DTO/class-validator request validation, and OpenAPI (Swagger) documentation. Developed a Next.js 15 (App Router) TypeScript frontend with Redux Toolkit slices, NextAuth session management, and UI flows wired to REST APIs. Implemented Stripe subscription billing and credit top-ups (checkout wiring, webhook handling with idempotency checks, and Stripe customer–user binding). Built an in-house multi-provider LLM routing layer with hot-swappable models/keys across OpenAI and Anthropic and added reliability controls (Zod structured output validation, confidence gating, retries/fallbacks, prompt/version regression suite). Added SSE streaming for real-time AI responses and bu