Senior Staff AI, Agentic Systems Engineer

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Mozilla

WebsiteLinkedInAll Job Openings

501 - 1000 employees

Founded 1998

👥 B2C

🔒 Cybersecurity

B2C • Cybersecurity • Software

Mozilla is a non-profit organization dedicated to promoting an open and accessible internet. They are the makers of the popular Firefox browser, which emphasizes user privacy, speed, and control. Mozilla also offers a range of products that focus on internet security and privacy, including Mozilla VPN, Firefox Relay, and Mozilla Monitor. Additionally, the organization is involved in open-source projects, AI innovation, and advocating for digital rights. Mozilla aims to empower users with trustworthy technology and policies that protect privacy, support open-source AI development, and foster accountability for tech companies.

📋 Description

• 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

• 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

• 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)