Fullstack Engineer - Intelligent Agents & Systems Job at Zyphra (Palo Alto)

Job Description

As a Fullstack Engineer, you will be a core contributor to Zyphra’s Agentic Systems and Interaction projects. You will be at the forefront of building a next-generation desktop and browser-based agent (end to end) that can autonomously navigate the web, interact with filesystems, and complete complex user tasks. This role spans frontend interfaces, secure sandboxing environments, large-scale document search and retrieval, and language/vision model integration.

Job Responsibility

Design and implementation of different agentic system designs capable of interacting with browsers, operating systems, enterprise filesystems, collaborations tools among others
Building search and retrieval pipelines across large-scale structured and unstructured data
Build the backend layer for RAG systems and other information context management systems required for agents to operate
Integrating LLMs, vision models, reinforcement learning, and scaffolding frameworks for autonomous, multi-step decision-making
Engineering secure virtualized runtimes and backend services for agent execution

Requirements

Proficiency in Python and a deep understanding of building and debugging complex end-to-end applications
Experience working with SaaS environment and production workloads, web interfaces, databases, search engines and queuing systems
Experience developing browser extensions or automation tools with fine-grained control over the browser (mouse, tabs, DOM)
Understanding of LLMs, prompting techniques, and orchestration frameworks for multi-step reasoning
Ability to work across the whole stack from web interfaces to control plane and data infrastructure like queuing systems, databases and search indexes.
Experience designing or working with secure and virtualized execution environments
Excellent communication and collaboration skills across product, research, and engineering teams

Nice to have

Experience building or integrating retrieval-augmented generation (RAG) systems
Experience working with enterprise security and compliance frameworks (e.g., SOC 2)
Familiarity with vector databases and large-scale document indexing
Knowledge of web automation tools and headless browser environments (e.g, Puppeteer, Playwright)
Understanding of sandboxed or containerized compute environments with strict access controls
Comfort designing user-facing agentic workflows and reasoning systems that span multiple modalities (text, vision, actions)
Experience using and fine-tuning models for screen reading, OCR, or UI understanding
Background in HCI or interest in building intuitive agent interfaces that extend human capabilities
Machine Learning experience as double bonus

What we offer

Comprehensive medical, dental, vision, and FSA plans
Competitive compensation and 401(k)
Relocation and immigration support on a case-by-case basis
On-site meals prepared by a dedicated culinary team
Thursday Happy Hours

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Fullstack Engineer - Intelligent Agents & Systems

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