> Markdown version of [/jobs/ext/3954545-backend-infrastructure-engineer](https://www.wearedevelopers.com/jobs/ext/3954545-backend-infrastructure-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Backend Infrastructure Engineer

- **Company:** SIDEGUIDE TECHNOLOGIES INC.
- **Location:** San Francisco, CA, United States
- **Experience:** Experienced
- **Salary:** $235,000 - $260,000
- **Contract:** Permanent contract
- **Skills:** Computer-Aided Design, Artificial Intelligence, Software Debugging, Github, Backend, Juniper
- **Published:** October 27, 2026
- **Apply:** https://www.careerbuilder.com/job-details/backend-infrastructure-engineer-san-francisco-ca--4fb7544f-78e7-45ec-aaa8-0fa0a40dfce9

## About the Role

Data Collection, CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing), GitHub, Juniper Networks M-Series, Artificial Intelligence (AI), Customer Relations, High Throughput, On Call, Accidental Death and Dismemberment (AD&D), Disability Insurance, Experience: 3+ years in backend, networking, or infrastructure engineering

Work Authorization: Open to candidates already authorized to work in the US or Canada. In the US, we also support H-1B transfers, F-1 OPT and STEM OPT, TN (Canada and Mexico), and E-3 (Australia). We're not able to sponsor new H-1B visas for candidates outside the US. For Canada, we'll consider work permit sponsorship case by case through our Toronto Hub., * You've worked on networking, proxies, or high-throughput backend systems

 * You're relentless about reliability and comfortable in messy, adversarial problem spaces
 * You can own a system end to end and keep it healthy in production
 * You move fast and close the loop. You'd rather ship, measure, and iterate than perfect on paper, * Someone who wants clean, well-defined problems only
 * Someone who avoids on-call or production ownership
 * Someone who needs the environment to be stable to do their best work

## Description

You'll work on the infrastructure that makes Firecrawl fast and reliable against a web that constantly changes and fights back. This is deep systems work: keeping success rates high against sites with aggressive defenses, managing the proxy layer that powers reliable data collection at scale, and pushing throughput and reliability under heavy, spiky load. When Firecrawl "just works" on a site that tries hard to stop it, that's this team. You'll own real infrastructure from day one, not tickets in a backlog., * Build and maintain the infrastructure that powers reliable data collection at scale

 * Improve success rates against sites with aggressive defenses
 * Own the health, rotation, and cost efficiency of the proxy layer
 * Push throughput and reliability under heavy, spiky, real-world load
 * Debug hard, intermittent failures across the stack and make them stay fixed