Full Time

Senior Full-Stack Engineer at OpenRouter

Company OpenRouter
Location Remote (US)
How You'll Work Remote
Level senior
Sector Technology
Posted Posted on March 9, 2026

Job Description

About the Role:

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.

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.
  • 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.

About You:

  • Experience: 4+ years of professional experience in full-stack development, including shipping user-facing features and working with modern front-end frameworks.
  • Technical Expertise: Proficient in React, TypeScript, Next.js, and JS runtimes. Bonus points for experience with Cloudflare Workers or other edge-first serverless platforms.
  • Startup Mindset: You thrive in fast-paced, ambiguous environments. You're resourceful, proactive, and comfortable taking ownership of projects end-to-end.
  • Collaborative & Autonomous: Strong communication skills and a team-oriented attitude. You can self-manage and deliver high-quality results while working asynchronously.
  • Craftsperson's Approach: You care deeply about user experience, performance, and maintainability. Your goal is to ship delightful and impactful features, not just code.

What We Offer:

  • Cutting-Edge Work: Be at the forefront of AI and LLM infrastructure, building tools for developers and enterprises alike.
  • Small, Talented Team: Work closely with a tight-knit group of top-notch engineers who value excellence and innovation.
  • Growth Opportunities: As we scale, grow into leadership roles or specialize further in your area of interest.
  • Competitive Compensation: Attractive salary, equity, and benefits that reflect the impact you'll have on our success.

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