Senior Software Engineer at Fern, New York NY

Neolife Updates; New York (NY); On-site; USD 200,000 - 250,000; Full time

Benefits offered by this job

Full medical coverage

Wellness reimbursement

Flexible PTO and lunch stipend

Donation-matching and team events

Job summary

Postman, Fern team in New York, is seeking a Senior Software Engineer to build AI infrastructure and developer-experience tools in a hands-on role.

Work with customers like Nvidia and Twilio, collaborate with designers and frontend engineers using TypeScript and Next.js, and ship production-grade features for API experiences. This full-time onsite opportunity offers growth in a fast-moving company.

Qualifications

• 5+ years of professional software engineering experience.
• Deep appreciation for developer experience as a craft.
• Strong written and verbal communication skills for solving technical problems alongside customers.
• Bonus: Experience building with TypeScript.

Responsibilities

• Scale AI infrastructure: Build and maintain systems deployed on cloud platforms that remain performant and secure under real-world load.
• Work directly with customers: Debug production edge cases and shape APIs based on feedback.
• Collaborate across the stack: Partner with designers and frontend engineers using TypeScript and Next.js to deliver polished interfaces.

Skills

5+ years of software engineering

Developer experience craft

Strong communication skills

TypeScript (bonus)

Tools

AWS

Vercel

Next.js

Job description

Postman, the world's leading API platform trusted by over 45 million developers and 98% of the Fortune 500, is hiring a Senior Software Engineer for Fern, a Postman company. Based in New York, NY, this full-time role sits at the intersection of AI infrastructure, developer experience design, and customer-facing engineering.

Senior Software Engineer at Fern (Postman) — New York, NY

About Fern

Fern helps software companies deliver world-class API experiences. Customers include Nvidia, Square, Twilio, ElevenLabs, and OpenRouter. With AI agents increasingly implementing API integrations, Fern ensures they have access to strongly typed schemas, deterministic contracts, and context-window-ready documentation.

The team is small and talent-dense — builders from Google, Palantir, Amazon, and Uber working together in New York City.

What You'll Do

• Scale AI infrastructure: Build and maintain systems deployed on Vercel, AWS, and Turbopuffer that remain performant, reliable, and secure under real-world load.
• Work directly with customers: Debug production edge cases at companies like Nvidia and Twilio, shape APIs based on feedback, and ship improvements rapidly.
• Collaborate across the stack: Partner with product designers and frontend engineers working in TypeScript and Next.js to deliver polished interfaces and seamless user experiences.

What We're Looking For

• 5+ years of professional software engineering experience.
• Deep appreciation for developer experience as a craft — taste matters in open-source work.
• Strong written and verbal communication skills for solving technical problems alongside customers.
• Bonus: Experience building with TypeScript.

Compensation

The reasonably estimated base salary ranges from $200,000 to $250,000, plus a competitive equity package. Actual compensation depends on skills, qualifications, and experience.

Benefits

• Full medical coverage and wellness reimbursement
• Flexible PTO and a monthly lunch stipend
• Donation-matching program and frequent team-building events

Work Arrangement

Postman values in-person collaboration. This role requires working from the New York City office five days a week, reflecting the belief that shared knowledge, brainstorming sessions, and trust built face-to-face cannot be fully replicated via video calls.

Application Tips for Engineering Candidates

• Showcase real infrastructure work: Highlight projects where you scaled systems on AWS, Vercel, or similar cloud platforms — Fern needs engineers who understand production-grade reliability.
• Demonstrate TypeScript fluency: Since the stack leans heavily on TypeScript and Next.js, include open-source contributions or production repos that showcase typed, well-structured code.
• Emphasize customer-facing problem-solving: Fern works directly with API teams at major companies. Point to instances where you debugged real production issues or shaped product direction from user feedback.
• Highlight API and developer-experience work: If you've built SDKs, contributed to API documentation, or designed typed schemas (OpenAPI, gRPC), make those visible — Fern's mission revolves around API quality.

If you're passionate about building developer experiences that reach millions and want to work alongside a high-caliber team in New York City, this role offers both the technical challenges and the compensation to match.