Senior Product Engineer – AI Developer Tools

Certus Sales Recruitment; New York (NY); On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Competitive base salary

Equity

Medical, Vision & Dental insurance

401(k) match

Unlimited PTO

Annual company offsite

12 weeks parental leave

Job summary

Certus Sales Recruitment is helping a fast-growing infrastructure startup hire a Product Engineer – Developer Tools / AI. You will own products end-to-end—from ideation to launch—and help build AI-powered developer tools used by engineers.

Ideal candidates have 7+ years of full-stack experience, strong React and TypeScript skills, and a proven track record shipping 0-to-1 products. You will work closely with the founders to validate ideas, shape strategy, and make long-term architectural

Qualifications

• Experience end-to-end ownership from ideation to launch.
• Proven track record shipping 0-to-1 products in startup/high-growth.
• Strong React and TypeScript experience.
• Experience with AI-driven features and coding agents.
• Familiarity with APIs, SDKs and developer tooling.

Responsibilities

• Own products end-to-end—from ideation and architecture through to launch, iteration and customer feedback.
• Build next-generation developer tools, including AI-powered coding agents.
• Work directly with the founders to validate ideas, shape product strategy and bring products to market quickly.
• Make key architectural and systems design decisions that shape products for the long term.
• Prototype and iterate rapidly on AI-driven features, agentic workflows and natural language interfaces.
• Build polished, high-performance product experiences across analytics, observability and AI/agent platforms.
• Work in a small, highly collaborative engineering team where you will have significant ownership and influence.

Skills

React

TypeScript

Full-stack

AI / LLMs

APIs / SDKs

0-to-1 products

Systems design

Job description

Certus Sales Recruitment is helping a fast-growing infrastructure startup hire a Product Engineer – Developer Tools / AI. You will own products end-to-end—from ideation to launch—and help build AI-powered developer tools used by engineers.

Ideal candidates have 7+ years of full-stack experience, strong React and TypeScript skills, and a proven track record shipping 0-to-1 products. You will work closely with the founders to validate ideas, shape strategy, and make long-term architectural