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GF
GFiber

Backend Engineer, AI Systems

Salary$177k – $195k
LocationSunnyvale, California, United States
Work modeon-site
Typefull-time
DepartmentEngineering
Company size1,001–5,000 people
First seen2mo ago
Last seen2d ago
About the company
At GFiber, we believe that great internet has the power to drive innovation, strengthen communities, enable the impossible, and do all the everyday things that make all of our world go round. And the job of creating better internet is never done - so we’re growing! Our team is committed to building a place where people who want to make a difference can grow their careers and find their spot to belong.
GFiber is an Alphabet company that brings Google Fiber and Google Fiber Webpass internet services to homes and businesses across the United States. Our teams are expanding as we connect more cities and people to exceptional internet.
The application window will be open until at least July 26th, 2026. This opportunity will remain online based on business needs which may be before or after the specified date.
This role is not eligible for immigration sponsorship.
Role Description
In this role you’ll work with the team that is building cutting-edge agentic AI chat assistants that help our customers resolve issues faster and more effectively. This is a hands-on role where you’ll own features end-to-end, from design through deployment and production support. This role requires a strong understanding of microservice architecture, RESTful APIs, design patterns, and distributed systems, along with the emerging AI trends and expertise in modern AI systems.
In this role, you’ll:
* Drive the full lifecycle of agent implementation, from initial design to a live, high-performing production environment using RAG, MCP, and agentic architectures * Test, evaluate, and fine-tune AI agents, RAG pipelines, and Model Context Protocol (MCP) implementations to hit strict performance targets using real-world data. * Implement and optimize REST APIs for seamless system integration * Debug, troubleshoot, and support production systems in real-time * Define and enforce best practices for system design, including scalability, fault tolerance, and performance optimization. * Work closely with frontend developers, DevOps engineers, product managers, and other stakeholders to deliver end-to-end solutions that meet business requirements. * Create and maintain technical documentation for architecture, APIs, and processes to facilitate knowledge sharing and onboarding. * Deploy and manage containerized services on Google Kubernetes Engine (GKE) or Cloud Run. * Implement deep tracking and monitoring for non-deterministic AI agent behaviors using Google Cloud Observability (Stackdriver) or OpenTelemetry.
At a minimum, we would like you to have:
* Bachelor’s degree in Computer Science, Information technology, a similar engineering discipline, or equivalent practical experience. * 5 years of software design and full stack development experience. * Python programming skills with direct production experience. * Practical experience building with LLMs, AI agents, and RAG pipelines, or a demonstrable ability to go deep on new technical frameworks (like MCP) incredibly fast. * Understanding of LLM behavior, limitations and failure modes in production contexts. * Direct experience with GCP (Google Cloud Platform).
It’s preferred if you have:
* Experience with the Backend-for-a-Frontend design pattern. * Familiarity with feature flags or configuration management for AI system rollouts. * Familiarity with LLM prompt optimization, prompt patterns, and guardrails against prompt injection/hallucinations. * Understanding of context engineering and how to structure information for LLM consumption. * Experience using AI coding tools like AntiGravity, Claude, Cursor etc * Experience with Java or Kotlin.
Benefits
The US base salary range for this full-time position is between $176,800 - $194,500 + bonus + benefits. As pay varies by location, your recruiter will share more about the specific salary range for your targeted location during the hiring process.
#LI-DNI
GFiber is committed to equal opportunity employment regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, gender identity, age, citizenship, marital status, disability or Veteran status. Disclosure is voluntary, and this information will be kept confidential in compliance with Google’s Candidate Privacy Policy. For more information please refer to our Equal Employment Opportunity Policy and the EEOC’s “Know your rights: workplace discrimination is illegal” (PDF).
It’s important to us to create an accessible, inclusive workplace for everyone. If you have a need that requires accommodation, please let us know by completing our accommodations for applicants form. Our candidate accommodations team will then connect with you to confidentially discuss your options.
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