Idler Software Engineer – Full Stack Engineer (React, Node.js, TypeScript)

Idler San Francisco, California, USA onsite

full-time

₹$100,000 – $150,000

Posted on 17 February 2026

Overview

Idler is hiring a Software Engineer in San Francisco to build tools and systems used for training advanced AI models through real-world coding environments. Idler focuses on creating reinforcement learning environments that help AI systems learn to code more effectively by simulating real engineering scenarios. This Software Engineer role at Idler offers an opportunity to work at the intersection of AI systems, full stack development, and developer tooling. Engineers will build UI components, backend services, and automated workflows that support AI training environments. Candidates searching for a React Node.js software engineer job in San Francisco, full stack developer role in AI startups, or a software engineer job working with AI training systems will gain hands-on experience working closely with founders and AI researchers in a fast-growing startup environment.

Key Responsibilities

Build frontend components using React and TypeScript for AI environment generation tools Develop backend services using Node.js to support scalable system workflows Design and implement automated testing and QA workflows for coding environments Work with real-world codebases to improve AI training data quality Build tooling for agentic systems used in AI model training and validation Collaborate with researchers and engineers to rapidly ship and iterate on features Contribute to system architecture decisions and product ideation discussions Optimize performance and reliability of full stack applications

Requirements

Strong experience in TypeScript, React.js, and Node.js development Experience building full stack web applications Understanding of backend systems and API development Familiarity with databases such as PostgreSQL and Redis Experience working with modern deployment platforms such as Vercel Strong problem-solving and debugging skills Ability to work in fast-paced startup environments Interest in AI systems, reinforcement learning environments, or developer tooling is a plus

Perks & Benefits

Competitive salary with equity participation Healthcare coverage and retirement benefits Latest MacBook Pro and equipment Meals, coffee, and snacks during working days Relocation assistance available Team offsites and collaborative in-person culture

About Company

Idler

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