Software Engineer - Cloud Infrastructure at Cosine.sh

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Software Engineer

Company Description:

Cosine.sh is an enterprise AI infrastructure platform, enabling advanced AI capabilities for consumers and global organisations. The company builds the foundational systems that power next-generation AI applications at scale.

Job Description:

Join Cosine.sh as a Software Engineer – Cloud Infrastructure and help build the core systems powering advanced AI workloads. You’ll design and operate the underlying infrastructure—Kubernetes clusters, deployment pipelines, cloud abstractions, and security layers—that delivers enterprise-grade reliability and scale. Your work will directly enable rapid product development and large-scale deployments across regulated environments.

Location: London, UK

Why this role is remarkable:

• Drive the backbone infrastructure enabling all research, engineering, and product teams to build AI experiences at speed.
• Work on enterprise-grade reliability and secure large-scale deployments, including regulated and on-premises environments.
• Build the foundational platforms that will scale Cosine’s infrastructure to the next order of magnitude while maintaining operational excellence.

What you will do:

• Design and build robust development and production platforms that deliver reliability and security at scale.
• Ensure Cosine’s core infrastructure is scalable, efficient, and resilient, powering rapid product iteration.
• Participate in the on-call rotation to maintain uptime and respond to critical incidents for the systems you build.

The ideal candidate:

• 5+ years' experience developing or operating core infrastructure systems.
• Proven experience running large-scale orchestration systems such as Kubernetes.
• Strong experience building abstractions and tooling on top of major cloud platforms, with a focus on reliability, scalability, and security.

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