Remote Fullstack Engineer for AI-powered Dev Tools

Tether Ltd.; Lisboa; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

Tether Ltd. is seeking a Fullstack Engineer to help QVAC application teams develop, review, test, and deliver reliable software across desktop and mobile platforms.

You will build and maintain developer tools, and integrate AI agents into engineering workflows to improve quality and automation. This hands-on role lets you shape tooling roadmaps, collaborate with fellow engineers, and own improvements from implementation through adoption.

Qualifications

• Experience building and maintaining developer tools or engineering automation used by others, with strong JavaScript/TypeScript and Node.js skills.
• Hands-on experience using and integrating AI coding tools or agents, with sound judgment about their limitations, output validation, and human review.
• Experience with Git, CI/CD, automated testing, and systematic debugging of build, test, or integration failures.
• A strong approach to code quality: maintainable code, useful automated checks, and refactoring that preserves behavior.
• Ability to work independently, collaborate with engineers, and communicate clearly in English within a remote, globally distributed team.

Responsibilities

• Evaluate, integrate, and maintain developer tools and AI agents, including the repository guidance and integrations they need to work effectively.
• Build and operate agents in CI and scheduled workflows that investigate failures, propose fixes, and give engineers evidence they can act on.
• Improve automated pull request reviews, evaluating finding accuracy and reducing noise for reviewers.
• Develop code quality scripts and checks for complexity, function and file size, dependency cycles, and performance regressions. Work with package owners on practical thresholds and targeted refactoring.
• Improve development environments, testing, and build and release workflows so engineers and agents can verify changes reliably.
• Prioritize improvements with engineering teams, support adoption through documentation and onboarding, and measure effectiveness, reliability, and operating costs.

Skills

JavaScript/TypeScript

Node.js

CI/CD

Debugging

Tools

Git

CI/CD pipelines

Job description

Tether Ltd. is seeking a Fullstack Engineer to help QVAC application teams develop, review, test, and deliver reliable software across desktop and mobile platforms.

You will build and maintain developer tools, and integrate AI agents into engineering workflows to improve quality and automation. This hands-on role lets you shape tooling roadmaps, collaborate with fellow engineers, and own improvements from implementation through adoption.