Build Engineer

5V Tech; Greater London; On-site; GBP 55,000 - 75,000; Full time

Job summary

5V Tech is seeking an engineer for a hybrid role to take ownership of Bazel in a fast-growing deep tech company. You will design and scale build systems while optimizing developer workflows in a greenfield environment. The ideal candidate has extensive experience in Software Engineering and CI/CD pipeline management. This role promises high ownership and visibility across the business, contributing to cutting-edge AI accelerator technology.

Qualifications

• Extensive experience in Software Engineering or Infrastructure Engineering.
• Proficient in working with build systems.
• Python scripting and automation skills.
• Experience building and maintaining CI/CD pipelines at scale.

Responsibilities

• Design and own Bazel rules and extensions.
• Scale a large monorepo across Python, C++, Rust, SystemVerilog, and ML workloads.
• Optimize CI performance across large compute clusters.
• Improve the developer experience across engineering teams.

Skills

Software Engineering

Infrastructure Engineering

Build systems

Python scripting

CI/CD pipelines

Tools

Bazel

Python

C++

Rust

SystemVerilog

Job description

Hybrid work model - 3 days in the office, 2 days wfh

6 months contract with possible extensions

5V Tech are working with a fast-growing deep tech company building a completely new class of AI accelerator hardware and software from first principles.

They’re now looking for an engineer to take ownership of Bazel at scale and build the tooling infrastructure that powers the entire engineering organisation.

This is a genuinely high-impact role in a greenfield environment, where you’ll help shape the build systems, developer workflows, and CI infrastructure from the ground up.

What you’ll be working on:

• Designing and owning Bazel rules and extensions
• Scaling a large monorepo across Python, C++, Rust, SystemVerilog, and ML workloads
• Optimising CI performance across large compute clusters
• Improving the developer experience across engineering teams
• Contributing upstream to Bazel rules and tooling
• Working closely with teams across AI/ML, Runtime, Simulation, Compilers, and Hardware

Why this role stands out:

• Greenfield environment with no legacy systems
• Huge technical variety across software, ML, infrastructure, and hardware
• High ownership and visibility across the business
• Opportunity to define how engineering operates as the company scales
• Cutting-edge AI and accelerator technology

What they’re looking for:

• Extensive experience in Software Engineering or Infrastructure Engineering
• Proficient in working with build systems
• Python scripting and automation skills
• Experience building and maintaining CI/CD pipelines at scale

Nice to have:

• Multi-language build environments