100% remote | Integral team | Full-timeIf 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 ***
* 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.

What You'll Do
Lead, not just code — Seniors at NineTwoThree don't just write great code—they lead projects, guide teams, and ensure execution quality:Connect the dots between product vision, technical feasibility, and business needsCommunicate options, trade-offs, costs, and timelines clearly to both our team and clientLead projects end-to-end — from technical strategy to executionArchitect solutions and apply best practices for scalable, AI-powered productsGuide and mentor engineers, ensuring quality while delivering fastTranslate business needs into technical decisions, explaining trade-offs and timelinesSolve hard problems, direct implementation, and coordinate technical challenges with clientsWho We're Looking For5+ 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 practicesGreat communicators who can explain options, trade-offs, and technical details to clients and teamsAbility to break down complex problems into manageable tasks; 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 trackStrong communication and analytical skillsRelational and no-SQL databases — MySQL, PostgreSQL, Redis etc; Solid understanding of principles of JavaScript/TypeScript languagesAbility to freely express/present/discuss ideas in English (B2-C1 level)Flexibility with

working hours
to participate in meetings with Eastern USANot for youIf you're looking for a pure coding role where someone else makes the decisions, this isn't it.20 days-off per year during the first 3 years, further increasing to 25 days in later yearsPaid sick leave, 10 national holidays and 2 company days-offWell-being budgetHealth Insurance allowanceMaternity/paternity leaveAccounting assistanceReimbursement of expenses for professional development courses/certifications (up to 100% in agreement with the Manager)Hardware upon business needsStrong positive engineering culture, a tightly-knit team of professionals with a good sense of humorWhat's The ProcessWe make the process fast and responsive.

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