Systems Reliability Engineer - Core

Location: Hybrid; hiring locations are Lisbon, Portugal, or London, UK. Candidates progressing to the offer stage may be asked to attend an in-person interview at a hirify.global office or hub.

Company

hirify.global operates a global network and security platform that protects and accelerates Internet applications for customers ranging from individual bloggers to Fortune 500 companies.

What you will do

• Architect, deploy, and maintain distributed systems with high availability, low latency, and horizontal scalability.
• Build the private cloud and internal tools that enable product teams to deploy and operate services safely and efficiently.
• Analyze bottlenecks, optimize kernel and network stacks, and fine-tune resource utilization across global server fleets.
• Develop automation for infrastructure deployment, configuration management, monitoring, and operational workflows.
• Support architecture reviews, capacity planning, and proactive system health monitoring to improve uptime and resilience.
• Collaborate with Security, Network Engineering, and Product teams on infrastructure integration.

Requirements

• Professional experience building and managing large-scale distributed systems or Linux production environments.
• Proficiency in at least one systems programming or scripting language, such as Go, Rust, C/C++, or Python, with experience writing clean, maintainable code.
• Deep understanding of Linux/Unix internals, including storage subsystems and memory management.
• Strong knowledge of core networking protocols, including TCP/IP, DNS, and BGP.
• Experience with configuration management and infrastructure-as-code tools such as Ansible, Terraform, or SaltStack.
• Strong analytical and troubleshooting skills with a methodical approach to diagnosing complex system-level failures.

Nice to have

• Experience managing containerized workloads at scale with Kubernetes, Docker, or similar orchestration platforms.
• Familiarity with CI/CD pipelines and automated infrastructure testing.
• Open-source systems software contributions or active participation in the systems engineering community.
• Experience with Kafka, Temporal, or other existing hirify.global tooling.
• Experience using AI to develop robust solutions.

Culture & Benefits

• Work in a mission-driven environment focused on protecting the free and open Internet.
• hirify.global supports diversity, inclusion, equal employment opportunity, and reasonable accommodations.
• The position may require access to information protected by U.S. export control laws; an offer may depend on authorization to receive controlled technology without export-license sponsorship.