Senior Full Stack JS Engineer

NineTwoThree AI Studio; España; A distancia; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A remote-first product studio is seeking a Full Stack Software Developer to lead projects and mentor engineers. The role involves working on AI-powered products and requires strong technical skills including React.js, Node.js, and Python, as well as the ability to communicate effectively with clients. Join a team focused on delivering innovative solutions and fostering career growth, with competitive benefits.

Servicios

20 days of paid vacation

Paid sick leave

Well-being budget

Maternity / paternity leave

Reimbursement for professional development

Strong engineering culture

Formación

• 5+ years of experience in Full Stack Software Development.
• Strong knowledge of cloud platforms such as AWS, Azure, or GCP.
• Clear understanding of design patterns and software development best practices.
• Ability to discuss technical details with clients and teams.

Responsabilidades

• Lead projects from technical strategy to execution.
• Communicate trade-offs, costs, and technical options.
• Architect solutions for scalable, AI-powered products.
• Mentor engineers and ensure quality.

Conocimientos

Full Stack Software Development

React.js

Node.js

Python

SQL

Cloud platforms (AWS, Azure, GCP)

Microservices architecture

JavaScript / TypeScript

API design and implementation

Communication

Descripción del empleo

Why Join Us?

🔹 100% remote| 🌎 Global team| ⏳ Full-time

Ifyou’re looking towork on cutting-edge AIproducts , solve challenging problems , and bepartofafast-moving, high-talent team , you’ll love ithere.

Join NineTwoThree AIStudio, a remote-first product design, engineering, and marketing studio, founded in2012 and based inBoston. Webuild AI-powered web and mobile apps for big brands and fast-moving startups.

You’ll work with really smart people —the kind ofteammates who challenge you, push you forward, and make you better. Wemove fast and focus on getting things done .

We’ve been growing20% every year for the last 5years, which means there’s plenty ofroom for career growth and promotions. Our work speaks for itself—someofour customers foundus through five layers ofreferrals . That’s how much people appreciate what wedo.

Werun on clear processes and strong leadership, sowhile wemove quickly, we don’t dochaos . Wedohigh-quality work, and wedoitright.

Wefocus onproducts with apositive impact invarious domains from sports and health, tologistics and nuclear . But ifyou’re into gambling, adult entertainment, orcrypto, we’re not your place.

Requirements

What You’ll Do

Lead, not just code — Seniors atNineTwoThree 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 needs.
• Communicate options, trade-offs, costs, and timelines clearly toboth our team and client.
• Lead projects end-to-end — from technical strategy toexecution.
• Architect solutions and apply best practices for scalable, AI-powered products.
• Guide and mentor engineers, ensuring quality while delivering fast.
• Translate business needs into technical decisions , explaining trade-offs and timelines.
• Solve hard problems , direct implementation, and coordinate technical challenges with clients

Who We’re Looking For

• 5+years ofexperience inFull Stack Software Development (React, Node.js, Python, SQL)
• Strong knowledge of cloud platforms (AWS, Azure orGCP).
• Clear and thorough understanding of design patterns and software development best practices
• Great communicators who can explain options, trade-offs, and technical details toclients and teams.
• Ability tobreak down complex problems into manageable tasks;
• Passion maintaining code style and standards and holding people accountable;
• Hands-on experience with microservices architecture;
• Experience with React.js, Node.js, JavaScript and Typescript (atleast 5years);
ful API design and implementation;
• OAuth and single sign-on (SAML);
• Leaders who ensure execution quality , push teams forward, and keep projects ontrack.
• Strong communication and analytical skills
• Relational and no-SQL databases— MySQL, PostgreSQL, Redis etc;
• Solid understanding of principles ofJavaScript / TypeScript languages
• Ability to freely express / present / discuss ideas inEnglish (B2-C1level)
• Flexibility with working hours toparticipate inmeetings with Eastern USA.

🚫 Not for you ? Ifyou’re looking for apure coding role where someone else makes the decisions, this isn’t it.

Benefits

What WeOffer

• Annual paid vacation : 20days-off per year during the first 3years, further increasing to 25days inlater years.
• Paid sick leave, 10national holidays and 2company days-off.
• Well-being budget.
• Maternity / paternity leave.
• Accounting assistance.
• Reimbursement ofexpenses for professional development courses / certifications (upto100% inagreement with the Manager).
• Hardware upon business needs.
• Strong positive engineering culture , atightly-knit team ofprofessionals with a good sense ofhumor .

What’s The Process

Wemake the process fast and responsive. Short HRinterview, Technical Q&A, Hands-on Practical Session (nobubble sorts), CTO interview (sometimes), Offer.

Apply now and lead the next generation ofAI-powered products.