100% remote | General team | Full-time
If you're looking to work on cutting-edge AI products , solve challenging problems , and be part of a fast-moving, high-talent team , you'll love it here.
Join NineTwoThree AI Studio, a remote-first product design, engineering, and marketing studio, founded in 2012 and based in Boston. We build AI-powered web and mobile apps for big brands and fast-moving startups.
We do high-quality work, and we do it right.
We focus on products with a positive impact in various domains from sports and health, to logistics and nuclear . But if you’re into gambling, adult entertainment, or crypto, we’re not your place.
Lead, not just code — Seniors at NineTwoThree don’t just write great code—they lead projects, guide teams, and ensure execution quality:
Lead projects end-to-end — from technical strategy to execution
Guide and mentor engineers, ensuring quality while delivering fast
5+ years of experience in Full Stack Software Development (React, Node.js, JavaScript, TypeScript, SQL)




~ Strong knowledge of cloud platforms (AWS, Azure or GCP)
~ Clear and thorough understanding of design patterns and software development best practices
~ Experience with React.js, Node.js, JavaScript and Typescript (at least 5 years);
~ Leaders who ensure execution quality, push teams forward, and keep projects on track
~ Relational and no-SQL databases — MySQL, PostgreSQL, Redis etc;
~ Solid understanding of principles of JavaScript/TypeScript languages
~ Ability to freely express/present/discuss ideas in English (B2-C1 level)
~ If you're looking for a pure coding role where someone else makes the decisions, this isn't it.
Paid sick leave, 10 national holidays and 2 company days-off
Well-being budget
Health Insurance allowance
Reimbursement of expenses for professional development courses/certifications (up to 100% in agreement with the Manager)

📌 Senior Full Stack Engineer (Fully Remote) (España)
🏢 NineTwoThree AI Studio
📍 España