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# Senior Full Stack JS Engineer

- **Company:** NineTwoThree AI Studio
- **Location:** Amsterdam, Netherlands (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Microsoft Azure, Cloud Computing, Software Design Patterns, PostgreSQL, MySQL, Node.Js, NoSQL, OAuth, Redis, Security Assertion Markup Language (SAML), Single Sign-On, SQL Databases, TypeScript, Software Organization, ReactJS, Maintaining Code, Restful APIs, Microservices
- **Published:** August 20, 2026
- **Apply:** https://www.adzuna.nl/details/5849766929

## About the Role

True senior engineers - not just people with years of experience, but those who own solutions and drive execution.

 * 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
 * Great communicators who can explain options, trade-offs, and technical details to clients and teams.
 * Ability to break 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 (at least 5 years);
 * RESTful API design and implementation;
 * OAuth and single sign-on (SAML);
 * Leaders who ensure execution quality, push teams forward, and keep projects on track.
 * Strong communication and analytical skills
 * 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)
 * Flexibility with working hours to participate in meetings with Eastern USA.

## Description

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 needs.
 * Communicate options, trade-offs, costs, and timelines clearly to both our team and client.
 * Lead projects end-to-end - from technical strategy to execution.
 * 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


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