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twentyAI
Senior Fullstack Engineer

Senior Fullstack Engineer

Hybrid

New york, United states

Senior

Full Time

28-02-2026

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Skills

Python TypeScript Stripe

Job Specifications

A fast-growing Series A fintech is hiring a Senior Fullstack Engineer to help scale its AI-powered revenue platform. The company processes $1B+ in annual invoice volume and supports 100+ high-growth customers across billing, invoicing, and revenue recognition.

The team is built by veterans of Palantir, Wise, Plaid, and Auth0, who previously founded and scaled companies acquired by Compass Group and Stripe.

What They’re Looking For

4+ years fullstack experience (strong in Python & Typescript)
Experience building and scaling production SaaS systems
Comfort owning features 0→1 in ambiguous, fast-paced environments
Strong product instincts and high agency

This is a high-ownership role with meaningful equity at a company coming off 10x ARR growth and fresh Series A funding.

About the Company

TwentyAI is a talent and staffing solutions firm that combines cutting-edge AI technology, deep data insights, and human expertise to connect top talent with outstanding opportunity, specializing in data, technology, finance and GTM. Our in-house proprietary data analytics platform streamlines the recruitment process, enabling our consultants to focus on building meaningful relationships and staying ahead of industry trends. Since 2008, we've invested in both people and technology, driving business growth and career developm... Know more