Member of Technical Staff (Applied AI Engineer)

**Location:**Toronto (Office)

On-site | Full-time

Compensation:$140K - $260K

Our client is seeking anApplied AI Engineerto join a high-growth, talent-dense team building open-source browser infrastructure for AI agents and applications. The organization provides a foundational Sessions API that enables developers to ship AI products capable of seamless web interaction.

After experiencing 50x growth in 2025 driven by a vibrant open-source community and word-of-mouth adoption, our client is expanding their founding engineering team. This role sits at the critical intersection of product engineering, applied research, and community engagement. The successful candidate will not only ship production-grade code but will also conduct experiments to determine the most effective strategies for browser automation, subsequently translating those insights into frameworks and content that empower the global developer ecosystem.

This is an intensive, high-impact role suited for engineers who thrive in fast-paced environments and are comfortable owning projects from conception to deployment.

Key Responsibilities

-**Framework Development:**Build and maintain high-performance browser agent frameworks (e.g., in TypeScript) that vertically integrate LLMs with core browser infrastructure. -**Applied Research:**Conduct rigorous experiments to evaluate model performance (GPT-4, Claude, Gemini, etc.), prompting strategies, and architectures specifically for browser automation. -**Ecosystem Integration:**Develop and maintain integrations with major AI frameworks such as LangChain, CrewAI, and emerging agent platforms. -**Technical Evangelism:**Author technical blog posts, documentation, and open-source demos that establish the organization as a primary authority on browser-based AI agents. -**Product Iteration:**Work closely with the founding team and customers to translate real-world feedback into platform features and improvements. -**End-to-End Ownership:**Scope, build, and ship "0 to 1" projects with minimal guidance, maintaining a focus on speed and pragmatism.

Interview Process

-**Initial Screening:**A 30-minute introductory call with a Co-Founder. -**Take-Home Assessment:**A practical test designed to evaluate technical problem-solving. -**Technical Leadership Interview:**A focused discussion with the CEO. -**Coding Assessment:**A technical interview and coding session with a Founding Engineer. -**Final Evaluation:**A work trial or final interview (subject to candidate availability).

Requirements

-Professional Experience:4+ years of engineering experience with a proven track record of shipping production AI agents (e.g., research automation, web scraping, or form-filling tools). -Technical Proficiency:Strong command ofTypeScript/JavaScriptandPython, with a deep understanding of both web development patterns and AI application architectures. -**AI Literacy:**Deep familiarity with modern LLMs and the ability to quickly evaluate technical tradeoffs between different models and frameworks. -**Open-Source Mindset:**Experience contributing to or maintaining open-source projects; comfortable building and engaging with a technical community. -**Communication Skills:**Ability to create compelling technical content, including blog posts and developer-centric demonstrations. -**Operational Intensity:**A high-intensity work ethic suited for a startup environment; ability to manage complex tasks with high autonomy. -**Preferred Qualifications:**Experience as a founder, previous roles at AI-first companies, or a history of building developer tools that achieved significant community adoption.

Technical Stack Overview:

-**Frontend:**React, TailwindCSS, Shadcn, Vite -**Backend:**Fastify, Node.js, Zod, NATs, Drizzle -**Data/Infra:**Redis, PostgreSQL, S3, Pulumi, Go, Firecracker VMs, Docker

Benefits

-Compensation:Competitive salary range of$140,000 – $260,000per year. -**Equity:**Founding team-level equity (as employee #5-7). -**Healthcare:**Comprehensive health and dental insurance for employees and their families. -**Perks:**Brand-new laptop setup, gym membership subsidies, and regular team events/off-sites. -**Impact:**Opportunity to solve deeply technical problems in distributed systems and virtualization while shaping a new category of AI infrastructure.

Due to the high volume of applications we anticipate, we regret that we are unable to provide individual feedback to all candidates. If you do not hear back from us within 4 weeks of your application, please assume that you have not been successful on this occasion. We genuinely appreciate your interest and wish you the best in your job search.

Commitment to Equality and Accessibility:

At MLabs, we are committed to offer equal opportunities to all candidates. We ensure no discrimination, accessible job adverts, and providing information in accessible formats. Our goal is to foster a diverse, inclusive workplace with equal opportunities for all. If you need any reasonable adjustments during any part of the hiring process or you would like to see the job-advert in an accessible format please let us know at the earliest opportunity by emailing human-resources@mlabs.city.

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