C

Frontend Engineer (Typescript)

Cadre
Full-time
On-site
Brooklyn, New York, United States
Frontend Development

Job Description: Frontend Engineer (Onsite in Brooklyn, NYC)

About Fern

At Fern, we are reshaping the way developers interact with APIs. Fresh from our Series A round led by Bessemer Venture Partners and Y Combinator, we are scaling rapidly to build the next generation of SDKs and developer tools. Our platform empowers developers to deliver “Stripe-level” API experiences with world-class SDKs and documentation.
We are headquartered in the heart of Williamsburg, Brooklyn, where our tight-knit team is redefining the Agent Experience (AX) with innovations like Model Context Protocol (MCP) and an intuitive "Ask AI" chat experience. Join us as we build products that power the APIs of tomorrow.

🚀 Role Overview: Frontend Engineer

As a Frontend Engineer at Fern, you will craft interactive, high-performance web applications that delight developers and redefine how APIs are consumed. You will be hands-on in building everything from end-to-end features to polished SDK experiences that enable seamless developer integrations.

🎯 What You’ll Do:

  • Build and maintain high-quality frontend applications using React, TypeScript, and Next.js.

  • Lead end-to-end projects and designs, focusing on major features and large-scale product initiatives.

  • Collaborate with backend engineers and designers to deliver a polished, user-centric experience.

  • Work with OpenAPI, Conjure (Palantir), and Smithy (AWS) to optimize API interactions and SDK generation.

  • Contribute to our Agent Experience (AX) platform, driving the integration of LLMs with APIs through MCP support.

  • Improve user experience by engaging with users, gathering feedback, and iterating rapidly.

🏆 Ideal Candidate Profile:

Seniority:

  • 3 - 8 years of professional frontend development experience.

  • Experience in high-velocity startups or reputable tech companies known for their technical rigor.

  • 2–5 years at a larger company OR 1–3 years at a startup with visible impact.

Work Experience:

  • Proven ability to drive impact—not just a code contributor, but a leader of initiatives.

  • Experience leading end-to-end projects and design, ideally owning major product features.

  • Ex-founder experience is a strong plus—we love entrepreneurial thinkers.

  • Experience working with APIs and SDKs.

Education:

  • A degree in Computer Science or a related field from a top university. Our recent hires come from Harvard, Stanford, Brown, and other top institutions.

💡 Skills We Value:

  • Frontend Proficiency: Strong expertise in JavaScript/TypeScript, React, and Next.js.

  • API Technologies: Familiarity with OpenAPI, Conjure (Palantir), and Smithy (AWS).

  • Design Sensibility: An eye for design and user experience.

  • Product Ownership: Capable of showcasing projects you are proud of—we want to see what you’ve built.

  • Polyglot Mindset: Willingness to work across multiple languages like TypeScript, Python, and Rust.

  • Customer-First Mindset: Enthusiastic about engaging with users to ensure we build polished, user-centric products.

🚫 Traits We Avoid:

  • Lack of experience in intense engineering environments.

  • Only working at small startups (<5 people) unless you were the founder.

  • Coding bootcamp only backgrounds—we are looking for hands-on, high-impact experience.

  • Multiple short stints (<1 year) unless you are a new grad.

🌟 Why Join Us?

  • Be part of a high-growth startup backed by Bessemer Venture Partners and YC.

  • Work onsite with a team of top engineers in the heart of Williamsburg, Brooklyn.

  • Shape the next generation of developer tools and API experiences.

  • Competitive salary, equity, and benefits. (170k-220k base)

  • Join a mission-driven team that is setting new standards for API development.

📍 Location:

  • Williamsburg, Brooklyn, NYC (Onsite, Full-Time)