Fullstack Engineer - AI-Powered DevTools & Automation

Tether Ltd.; Amsterdam; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Tether Ltd. in Amsterdam is seeking a hands-on Fullstack Engineer to help QVAC application teams develop, review, test, and deliver reliable software for desktop and mobile platforms. You will build and maintain developer tools, integrate AI agents into engineering workflows, and improve code quality and automation.

This is a hands-on role with room to shape the tooling roadmap. You will work with engineers to implement improvements, drive adoption, and support ongoing delivery while maintaining

Qualifications

• Experience building and maintaining developer tools or engineering automation used by others.
• Strong JavaScript/TypeScript and Node.js skills.
• Hands-on experience using and integrating AI coding tools or agents.
• Experience with Git, CI/CD, automated testing, and systematic debugging of build, test, or integration failures.
• Ability to work independently, collaborate with engineers, and communicate clearly in English within a remote team.

Responsibilities

• Evaluate, integrate, and maintain developer tools and AI agents, including repository guidance and integrations.
• Build and operate agents in CI and scheduled workflows to investigate failures and propose fixes.
• Improve automated pull request reviews, evaluating finding accuracy and reducing noise for reviewers.
• Develop code quality scripts and checks for complexity, size, dependencies, and performance regressions.
• Improve development environments, testing, and build and release workflows for reliable verification of changes.
• Prioritize improvements with teams, document adoption, and measure effectiveness, reliability, and operating costs.
• Example projects include agents that investigate CI failures, diagnose regressions, and flag changes affecting interfaces or architecture.

Skills

JavaScript/TypeScript

Node.js

AI tooling

Developer tools

Git

CI/CD

Automated testing

Debugging

Tools

Git

CI/CD

Automated testing

Job description

Tether Ltd. in Amsterdam is seeking a hands-on Fullstack Engineer to help QVAC application teams develop, review, test, and deliver reliable software for desktop and mobile platforms. You will build and maintain developer tools, integrate AI agents into engineering workflows, and improve code quality and automation.

This is a hands-on role with room to shape the tooling roadmap. You will work with engineers to implement improvements, drive adoption, and support ongoing delivery while maintaining