Intermediate Fullstack Engineer (TypeScript), AI Engineering: Editor Extensions - Multi-Platform

GitLab; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading software company in the UK is seeking a Fullstack Engineer to enhance the AI-powered development tools. This role will involve building and refining editor extensions for developers' daily workflows using TypeScript and Node.js. The ideal candidate will have a background in command-line applications, experience with IDE extensions, and a passion for tools that integrate seamlessly into developer environments. Flexible remote working options are available, with support for team members' health and growth.

Benefits

Flexible Paid Time Off

Home office support

Growth and Development Fund

Qualifications

• Strong proficiency with TypeScript across frontend and backend.
• Experience building command-line applications using modern frameworks.
• Familiarity with IDE extension ecosystems like JetBrains.

Responsibilities

• Contribute to building multi-platform editor extensions.
• Implement TypeScript and Node.js services for GitLab Duo.
• Develop JetBrains IDE plugins for intuitive in-IDE experiences.

Skills

TypeScript

Node.js

Kotlin

Vue 3

Command-line applications

IDE extension development

Job description

GitLab is an open-core software company that develops the most comprehensive AI-powered DevSecOps Platform, used by more than 100,000 organizations. Our mission is to enable everyone to contribute to and co-create the software that powers our world. When everyone can contribute, consumers become contributors, significantly accelerating human progress. Our platform unites teams and organizations, breaking down barriers and redefining what's possible in software development. Thanks to products like Duo Enterprise and Duo Agent Platform, customers get AI benefits at every stage of the SDLC. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. GitLab is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. An overview of this role As a Fullstack Engineer on the AI Engineering: Editor Extensions Multi-Platform team at GitLab, you'll build tools that bring GitLab Duo directly into developers' daily workflows. You'll help shape AI-assisted experiences in the places developers spend most of their time, including JetBrains IDEs, the terminal, and future multi-platform interfaces. In this role, you'll work primarily with TypeScript across frontend and backend. You'll also contribute to Kotlin-based JetBrains plugins and shared UI systems that power our next-generation editor experiences. You will collaborate closely with other engineers in the AI Engineering section to design, implement, and evolve features that make GitLab Duo feel fast, intuitive, and deeply integrated. Your work will span the Duo CLI, the GitLab Language Server, and shared Vue-based components that provide consistent, intelligent behavior across platforms. You will have the opportunity to influence architecture, improve performance at scale, and shape internal standards for high-quality, maintainable TypeScript and Kotlin code. This role is a chance to combine fullstack engineering with cutting-edge AI-powered developer tooling in GitLab's remote, asynchronous, and values-driven environment. Some Examples Of Our Projects

What You’ll Do

• Contribute across the stack to build and refine multi-platform editor extensions that bring GitLab Duo directly into developers' daily workflows.
• Design, implement, and maintain TypeScript and Node.js services that power our GitLab Duo CLI, including rich interactive terminal experiences.
• Develop and enhance our JetBrains IDE plugin, working with the IntelliJ Platform SDK and Kotlin to deliver performant, intuitive in-IDE experiences.
• Implement features and improvements in our GitLab Language Server to provide consistent, AI-assisted workflows across editors and platforms.
• Build modern, accessible UI components using Vue 3, shadcn-style component libraries, and Tailwind-based theming as part of our next-generation editor experience.
• Collaborate closely with product, design, and other engineering teams in the AI Engineering section to align technical decisions with our broader multi-platform strategy.
• Advocate for and contribute to improvements in product quality, security, performance, and developer experience, including refining internal engineering standards and best practices.
• Participate in code reviews, provide mentorship to peers, and help shape the technical direction of editor extensions and multi-platform developer tooling at GitLab.

Qualifications

• Strong proficiency with TypeScript across frontend and backend, including building and maintaining Node.js-based services.
• Hands‑on experience building command-line applications and interactive terminal experiences using modern frameworks or libraries.
• Experience working with modern IDE extension ecosystems (for example, JetBrains IDEs or similar platforms), including understanding of plugin architectures and development workflows.
• Experience with Kotlin or modern Java, and an interest in applying or extending that experience to multi-platform development.
• Understanding of the Language Server Protocol (LSP) or experience working with language servers and editor integration.
• Experience with modern build systems, including managing multi-module builds and dependencies.
• Experience with Vue 3, the Composition API, and reactive UI design, including work with component libraries and theming systems.

How GitLab Will Support You

All roles are remote. However, some roles may carry specific location-based eligibility requirements. Our Talent Acquisition team can help answer any questions about location after starting the recruiting process.

• Benefits to support your health, finances, and well-being
• Flexible Paid Time Off
• Team Member Resource Groups
• Equity Compensation & Employee Stock Purchase Plan
• Growth and Development Fund
• Parental leave
• Home office support

Remote-Global

GitLab is proud to be an equal opportunity workplace and is an affirmative action employer. GitLab’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharge status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans, and Armed Forces service medal veterans), or any other basis protected by law. GitLab will not tolerate discrimination or harassment based on any of these characteristics. See also GitLab’s EEO Policy and EEO is the Law. If you have a disability or special need that requires accommodation, please let us know during the recruiting process.