Senior Software Engineer, Core Cloud Engineering

Who We Are

Vultr is on a mission to make high-performance cloud infrastructure easy to use, affordable, and locally accessible for enterprises and AI innovators around the world.  With 32 global cloud data center locations, Vultr is trusted by hundreds of thousands of active customers across 185 countries for its flexible, scalable, global Cloud Compute, Cloud GPU, Bare Metal, and Cloud Storage solutions.  In December 2024 Vultr announced an equity financing at a $3.5 billion valuation.  Founded by David Aninowsky and self-funded for over a decade, Vultr has grown to become the world’s largest privately-held cloud infrastructure company.

Vultr Cares

• 100% company-paid insurance premiums for employee medical, dental and vision plans. 

• 401(k) plan that matches 100% up to 4%, with immediate vesting

• Professional Development Reimbursement of $2,500 each year

• 11 Holidays + Paid Time Off Accrual + Rollover Plan 

• Commitment matters to Vultr! Increased PTO at 3 year and 10 year anniversary + 1 month paid sabbatical every 5 years + Anniversary Bonus each year

• $500 stipend for remote office setup in first year + $400 each following year

• Internet reimbursement up to $75 per month

• Gym membership reimbursement up to $50 per month

• Company paid Wellable subscription

Join Vultr

Our Engineering team at Vultr is seeking a Senior Software Engineer, Core Cloud Engineering to report to the Director of Core Cloud Engineering. This role demands a deep understanding of low-level systems programming, networking protocols, and hypervisor technologies. The ideal candidate will excel in working with compiled languages like Rust, C, and Go, with occasional work in PHP for system integration. This is a hands-on engineering position with an emphasis on performance optimization, automation, and systems-level problem-solving, contributing to one of the most popular cloud platforms serving 1.5 million users.

Key Responsibilities

• Hypervisor API Integration: Design, implement, and maintain low-level integrations with hypervisor technologies like libvirt, QEMU, and KVM to enhance platform capabilities.
• Networking Automation: Develop and maintain automation around Open vSwitch (OVS), BGP routing, and other networking components to streamline datacenter operations.
• Performance Tuning: Analyze and optimize hypervisor performance across I/O, networking, and storage subsystems to meet scalability and efficiency goals.
• Systems Development: Write efficient and maintainable code in Rust, C, and Go for high-performance services, ensuring reliability and maintainability.
• Infrastructure Automation: Build and enhance tooling for automated hypervisor provisioning, monitoring, and management.
• Collaboration: Work closely with other engineering teams to align development efforts with reliability, scalability, and business objectives.
• Documentation: Produce high-quality technical documentation for APIs, systems, and processes to support team collaboration and scalability.
• Mentorship: Share knowledge with team members, helping to grow expertise in low-level systems and performance engineering.

Qualifications

• Proficiency in compiled languages like Rust (preferred), C, and Go, with experience in PHP for integration tasks.
• Strong experience with hypervisor technologies such as libvirt, QEMU, and KVM.
• In-depth knowledge of networking protocols and tools, particularly BGP, Open vSwitch (OVS), and related automation frameworks.
• Advanced skills in performance profiling, tuning, and optimization across I/O, network, and storage layers.
• Familiarity with database systems and concepts, with a preference for MySQL.
• Expertise in Linux systems administration and low-level troubleshooting.
• Experience building and maintaining CI/CD pipelines with tools like Gitlab.
• Strong knowledge of conf