Job Url: https://jobs.ashbyhq.com/openrouter/63265414-7beb-4c2d-ab2a-6b6e80e99703

Job Description: 
Senior Full-Stack Engineer
Location
Remote (US)

Employment Type
Full time

Location Type
Remote

Department
Engineering

Compensation
$175K – $200K • Offers Equity
Overview
Application
About the Role:

OpenRouter is the world’s largest marketplace of LLMs, growing rapidly to meet the evolving needs of developers, enterprises, and AI enthusiasts. As part of our small, highly technical team of 5, we are looking for a Senior Full-Stack Engineer who thrives on shipping user-facing features, building elegant front-end interfaces with React, and creating powerful backend API functionality.

This role is ideal for engineers who love autonomy, value collaboration, and have a track record of shipping software that works. You’ll play a critical role in shaping our product as we scale, helping expand our platform’s features, and delivering exceptional experiences for our users.

We work asynchronously over Slack, Notion, and Linear, protecting uninterrupted time to build. If you’re passionate about crafting high-quality software, working with cutting-edge technology, and helping us create an impactful AI infrastructure company, we’d love to hear from you.

Key Responsibilities:

Front-End Development:
Build and maintain user-friendly, high-performance interfaces using React and Next.js. Translate designs into smooth, functional experiences for our diverse user base.

API Development & Backend Work:
Design, implement, and deploy scalable API functionality using Cloudflare Workers and edge-first architectures. Ensure robust backend systems to support our platform's rapid growth.

End-to-End Product Ownership:
Take features from concept to production, ensuring they are performant, reliable, and delightful for users. Make good product and design decisions, and be open to feedback and collaborative creation.

Maintain High Standards:
Write clean, maintainable, and well-documented TypeScript code. We believe in good types! Contribute to code reviews, bring your experience, and uphold best practices to elevate the team.

Problem Solving & Scalability:
Identify bottlenecks, build great monitoring, propose solutions, and optimize performance across both frontend and backend systems.