Senior Infrastructure Engineer at Cosine.sh

Jack & Jill/External ATS; Greater London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A fast-paced Silicon Valley startup is seeking a Senior Infrastructure Engineer to take ownership of their Kubernetes-based platform and deployment processes. The role involves designing scalable infrastructures while leading the implementation of reliable CI/CD pipelines. The ideal candidate should have over 5 years of experience in cloud infrastructure, particularly with hands-on Kubernetes management. This role offers significant responsibility in shaping core systems, ensuring both reliability and security in a dynamic environment.

Qualifications

• 5+ years building and operating production infrastructure on a major cloud.
• Significant hands-on experience running Kubernetes in production.
• Deep experience with Infrastructure-as-Code tools.

Responsibilities

• Own the design, operation, and evolution of our Kubernetes-based platform.
• Build and maintain robust CI/CD pipelines.
• Define and track SLOs and lead incident response.

Skills

Kubernetes

Cloud infrastructure

Infrastructure-as-Code

Tools

Terraform

Pulumi

CDK

Job description

This is a job that we are recruiting for on behalf of one of our customers.

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Senior Infrastructure Engineer

Company Description:

Cosine.sh – Fast-paced, venture-backed Silicon Valley startup

Job Description:

Join Cosine.sh as a Senior Infrastructure Engineer to own and evolve our core Kubernetes-based platform, deployment pipelines, and observability. You’ll design the “paved road” for engineers, researchers, and customers, ensuring reliability and security for demanding enterprise deployments. This high-ownership role directly shapes how we build and ship products.

Location:

London, UK

Why this role is remarkable:

• Take high ownership, shaping how Cosine.sh builds and ships products alongside founding engineers and leadership.
• Work at a fast-paced, venture-backed Silicon Valley startup, contributing to a rapidly evolving platform.
• Design and run the “paved road” for engineers, researchers, and customers, impacting core infrastructure from Kubernetes to deployment.

What you will do:

• Own the design, operation, and evolution of our Kubernetes-based platform, including cluster topology and autoscaling.
• Build and maintain robust CI/CD pipelines, implementing safe rollout strategies and fast rollback paths.
• Define and track SLOs, improve observability, and lead incident response to ensure system reliability.

The ideal candidate:

• 5+ years building and operating production infrastructure on a major cloud (AWS, GCP, or Azure).
• Significant hands‑on experience running Kubernetes in production, including cluster upgrades and multi‑environment setups.
• Deep experience with Infrastructure-as-Code tools like Pulumi, Terraform, or CDK.

How to Apply:

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