Sandbox Systems Engineer (Rust/C++) - Equity & Benefits

Maven Ventures; Greater London; On-site; GBP 90,000 - 140,000; Full time

Benefits offered by this job

Equity

Comprehensive medical, vision, and dental coverage

401(k) retirement plan

Short & long-term disability insurance

Life insurance

Job summary

A leading technology company in Greater London is seeking a skilled engineer to tackle deep technical challenges in a dynamic setting. Ideal candidates will possess expertise in Rust, C++, or Go, with additional familiarity with Python and strong experience in either Linux or Windows systems. They will work on virtualization and containerization technologies while contributing to the reliability and performance of complex systems. The role offers a comprehensive rewards package, ensuring collaboration within a motivated team.

Qualifications

• Candidates should have exceptional technical ability in Rust, C++ or Go.
• Experience in fast-paced, high-performance environments is crucial.
• Strong problem-solving skills and adaptability are required.

Responsibilities

• Work on technical challenges in a fast-moving environment.
• Contribute to the reliability and performance of systems.

Skills

Expert knowledge of Rust, C++ or Go

Familiarity with Python

Deep experience with Linux or Windows systems

Experience with virtualization technologies

Solid knowledge of the networking stack

Tools

Containers and virtualization technologies

Job description

SpaceXAI’s mission is to create AI systems that can accurately understand the universe and aid humanity in its pursuit of knowledge. Our team is small, highly motivated, and focused on engineering excellence. This organization is for individuals who appreciate challenging themselves and thrive on curiosity. We operate with a flat organizational structure. All employees are expected to be hands-on and to contribute directly to the company’s mission. Leadership is given to those who show initiative and consistently deliver excellence. Work ethic and strong prioritization skills are important. All employees are expected to have strong communication skills. They should be able to concisely and accurately share knowledge with their teammates.

ABOUT THE ROLE:

The Sandbox service team at SpaceXAI builds and maintains a secure, scalable system that gives our models safe, controlled access to computational environments. This infrastructure powers critical workloads across training and product, enabling models to run code, build software, interact with tools, and even control applications with user interfaces. We provision containers and virtual machines on large-scale clusters, granting models interactive control over these remote environments. Our work spans the full stack: from orchestrating massive jobs and resource scheduling at the cluster level, to fine-tuning filesystem performance on nodes. The Sandbox service enables Grok to safely run and test code in real-time for user queries, and supports reinforcement learning in training, where models interactively explore tools ranging from compilers to productivity apps.

BASIC QUALIFICATIONS:

• Expert knowledge of Rust, C++ or Go
• Familiarity with Python
• Deep experience with either Linux or Windows systems (familiarity with both is a strong plus)
• Experience with virtualisation and containerisation technologies (e.g., cgroups, KVM, gVisor, QEMU)
• Solid knowledge of the networking stack

COMPENSATION AND BENEFITS:

£107,000 - £262,000 GBP

Base salary is just one part of our total rewards package at SpaceXAI, which also includes equity, comprehensive healthcare and dental coverage, cash plan, income protection, life insurance, and various other discounts and perks.

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