Senior Staff AI, Agentic Systems Engineer

Mozilla

Senior Staff Engineer at Mozilla leading architectural design for next-gen AI agent frameworks and workflows. Focused on building and scaling autonomous capabilities in a remote role within a fast-paced team.

Posted 7/9/2026full-timeRemote • 🇨🇦 CanadaSenior💰 CA$165,000 - CA$220,000 per yearWebsite

Tech Stack

Tools & technologies

GoPython

About the role

Key responsibilities & impact

Design and deploy production-grade multi-agent frameworks, complex orchestration layers, and custom AI developer tooling.
Navigate the tension between rapid prototyping and long-term sustainability, knowing exactly when to cut corners to validate a concept and when to slow down to lay rock-solid architectural foundations.
Navigate and integrate various commercial and open-source large language models, selecting and optimizing the right models for specific agentic behaviors.
Lead by example by extensively leveraging advanced AI coding tools to maximize velocity, while establishing best practices for AI-assisted engineering across the team.
Implement rigorous frameworks for benchmarking, prompt engineering, and evaluating agent reliability, latency, and accuracy.
Set engineering standards for code quality and system performance, mentoring other engineers and acting as a primary bridge between research and product.

Requirements

What you’ll need

7+ years of professional software engineering experience, particularly in fast-paced environments where you've shipped complex systems from scratch.
A proven ability to judge technical debt. You know how to ship an MVP in days, but you also know how to design a clean API boundary so that early speed doesn't block future scale.
2+ years of direct, hands-on production experience specifically building autonomous workflows, custom tools, and agentic systems.
Deep familiarity with diverse LLMs and orchestration frameworks (e.g., LangChain, LangGraph, CrewAI, AutoGen, or similar tools).
Prior early-stage startup experience, meaning you are comfortable with ambiguity, pivot quickly based on data, and focus heavily on execution.
Deep, everyday proficiency building software with advanced AI coding tools (such as Cursor, Copilot, or custom LLM extensions) to radically speed up delivery.
Comfort writing clean, high-performance code in languages like Python or Go, with a solid grasp of distributed backend systems.

Benefits

Comp & perks

Generous performance-based bonus plans to all eligible employees – we share in our success as one team
Rich medical, dental, and vision coverage
Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
Quarterly all-company wellness days where everyone takes a pause together
Country-specific holidays plus a day off for your birthday
One-time home-office stipend
Annual professional development budget
Quarterly well-being stipend
Considerable paid parental leave
Employee referral bonus program
Other benefits (life/AD&D, disability, EAP, etc. – varies by country)

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Hard Skills & Tools

Software EngineeringAPI DesignBenchmarking FrameworksPrompt EngineeringDistributed Backend SystemsComplex Systems DevelopmentOrchestration FrameworksTechnical Debt ManagementMVP DevelopmentAgentic Systems

Soft Skills

MentoringAdaptabilityExecution FocusProblem-Solving