Full-Stack Software Engineer

Grapevine Round1 AI; San Francisco, Northern (CA, KY); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Concentrate AI is an early-stage startup building an OpenAI-compatible multi-provider LLM platform. You will own end-to-end features using a TypeScript, Node.js, and React stack, building robust RESTful APIs, managing PostgreSQL databases, and handling containerized deployments. This is a high-autonomy role working closely with the founding team.

The role emphasizes strong proficiency in TS/Node/React, backend with Fastify, and secure authentication flows, with remote work from the United States.

Qualifications

• 2+ years of experience in full-stack development.
• Strong proficiency with TypeScript and Node.js.
• Experience building production-grade frontends with React.
• Backend development using Fastify.
• Solid understanding of PostgreSQL.
• Familiarity with Docker and CI/CD workflows.
• Experience implementing secure authentication flows.

Responsibilities

• Own end-to-end features across the stack from design to deployment.
• Build robust RESTful APIs using TypeScript/Node.js.
• Design and manage PostgreSQL schemas and queries.
• Handle containerized deployments and CI/CD pipelines.
• Collaborate closely with the founding team in a high-autonomy role.

Skills

TypeScript

Node.js

React

RESTful APIs

PostgreSQL

Docker

CI/CD

Authentication

Fastify

Tools

Next.js

Tailwind

kysely

drizzle

redis

nginx

turborepo

nx

Job description

# Full-Stack Software EngineerConcentrate AISan Francisco, United StatesPosted 8 Aug 2026Concentrate AI is an early-stage startup building an OpenAI-compatible multi-provider LLM platform. The role involves end-to-end feature ownership using a TypeScript, Node.js, and React stack. You will build robust RESTful APIs, manage PostgreSQL databases, and handle containerized deployments. This is a high-autonomy role working closely with the founding team.Matched by TALApply to this role now. Install TAL for a 24/7 AI agent that keeps finding roles personalised for you.Apply nowInstall TALExperience2+ yearsFunctionEngineeringWork modeRemote, United StatesCompanyTier 2## What you will work onConcentrate AI is an early-stage startup building an OpenAI-compatible multi-provider LLM platform. The role involves end-to-end feature ownership using a TypeScript, Node.js, and React stack. You will build robust RESTful APIs, manage PostgreSQL databases, and handle containerized deployments. This is a high-autonomy role working closely with the founding team.## TAL's takeQuality 60/1005/5 clarityTier 2 companySolid early-stage opportunity in the high-growth AI infrastructure space with clear ownership expectations.Extremely clear responsibilities, tech stack, and evaluation process described.## Must haves* 2+ years of experience* Strong proficiency with TypeScript and Node.js* Experience building production-grade frontends with React* Backend development experience with frameworks like Fastify* Solid understanding of PostgreSQL* Familiarity with Docker and CI/CD workflows* Experience implementing secure authentication flows## Tools and skillstypescriptnode.jsreactpostgresqldockerci/cdrestful apisNice to have: next.js, tailwind, fastify, kysely, drizzle, redis, nginx, turborepo, nx.## About the companyEarly-stage startup with venture backing but not yet a prominent market leader.