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Fullstack Engineer (TypeScript), AI Engineering: Duo Client SDK

GitLab

Canada · CanadaListed todayPosted by the employer Aug 21, 2026Listing ends Dec 28, 2026

Compensation: Unconfirmed
Location: Canada
Fully remoteMore jobs: Canada
Employment: Full-time
Category: Engineering

Role skills

typescript node.js vue security api on-call agile ai

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About the job

5 min read6 sections

GitLab is the intelligent orchestration platform for DevSecOps. GitLab enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust GitLab to ship better, more secure software faster.

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.

Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on GitLab data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of GitLab.

An overview of this role

As a Fullstack Engineer on the Duo Client SDK team at GitLab, you'll build the shared foundation for every GitLab Duo client. Today, the logic that powers Duo in editors lives inside the GitLab Language Server. We're extracting it into a true software development kit (SDK): a set of well-versioned TypeScript packages that editor extensions, our web-based Duo Chat on GitLab.com, and eventually external applications can use.

You'll work in TypeScript across frontend and backend systems. You'll design the SDK's Node.js core and public application programming interface (API), and work in the clients that use it. The work rewards care about interfaces, versioning, and backward compatibility as much as features because other engineers will depend on what you build.

You'll have senior and staff engineers alongside you to help with design. You'll own the implementation of scoped packages and ship improvements with minimal guidance while collaborating with the team on larger architectural changes.

Some examples of our projects

The Duo Client SDK, extracting versioned, publishable packages from the GitLab Language Server
The GitLab Language Server, rebuilt on top of the SDK as our polyglot surface
Duo Chat on the web, as one of the SDK's first consumers

What you'll do

Develop secure, well-tested, and performant TypeScript features that solve technical problems of moderate scope and complexity.
Ship small features and improvements with minimal guidance, writing tests with every merge request and contributing to code reviews and design discussions.
Extract and publish TypeScript packages from the GitLab Language Server, migrating consumers incrementally so no parallel implementation is left to drift.
Design durable public APIs with clear interfaces, semantic versioning, changelogs, and deprecation paths for external consumers.
Build isomorphic core packages that isolate platform-specific behavior in adapters at the edges.
Build and improve SDK client surfaces, including Vue 3 components in Duo Chat on the web, in collaboration with product, design, and engineering teams.
Strengthen credential handling across hosts, including bearer tokens, session cookies, and CSRF protection.
Optimize bundle size, startup cost, and dependency weight for browser consumers, and support a Tier 2 on-call rotation for urgent engineering issues.

What you'll bring

Strong proficiency with TypeScript across frontend and backend systems, including experience building and maintaining Node.js services.
Experience with modern build and packaging tools, including monorepos, multi-module builds, ECMAScript modules (ESM), and dependency management.
Experience with Vue 3 and the Composition API, or comparable component-based frontend experience and a willingness to learn Vue.
Experience designing APIs that other people use, with the ability to explain what you'd do differently.
Understanding of the differences between running code in Node.js and in the browser, and how to write code that works in both.
A security-minded development approach, including careful credential handling and performance optimization.
Ability to communicate clearly and concisely in writing about technical problems, propose iterative solutions, and work effectively in an agile environment.
Self-motivation, strong organizational skills, and the judgment to ask for help when needed while thriving in a fully remote organization aligned with GitLab's values.

About the team

The Duo Client SDK team sits in GitLab's AI Clients stage and works closely with teams building GitLab Duo experiences. We collaborate across client surfaces to make thoughtful technical decisions as the platform evolves. We work fully remotely and asynchronously across regions, in the open, following GitLab's values of transparency and open communication.

Remote-Global How GitLab Supports Full-Time Employees

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

Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application.

Country Hiring Guidelines: GitLab hires new team members in countries around the world. All of our 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.

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 .

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About GitLab

GitLab is a software forge primarily developed by GitLab Inc. It is available as either a free software "Community" edition or a proprietary software "Enterpris…Based on Wikipedia · CC BY-SA 4.0