Senior Infrastructure Engineer

Cosine
London
Workplace: OnsiteFull timeGBP 75,000 - 100,000 annuallyFunction: DevOps, Cloud & InfrastructureExperience: 5+ yearsSkills: ["Problem-solving","Communication","Teamwork"]

Senior Platform/Infra Engineer to own Cosine’s core infrastructure, including Kubernetes, CI/CD pipelines, and platform services. Lead reliability with SRE practices, shape networking and security for multi-tenant environments, and collaborate with product and research teams to build reusable infra, influencing production-ready deployments in a fast-paced startup.

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Cosine
Cosine
8 months ago

Senior Infrastructure Engineer

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Source: Company careers pageValidated by: Fursa AI
Last checked: 16 hours agoStatus: Live

Job Summary

Senior Platform/Infra Engineer to own Cosine’s core infrastructure, including Kubernetes, CI/CD pipelines, and platform services. Lead reliability with SRE practices, shape networking and security for multi-tenant environments, and collaborate with product and research teams to build reusable infra, influencing production-ready deployments in a fast-paced startup.
Location: London
Workplace: Onsite
Employment Type: Full time
Job Function: DevOps, Cloud & Infrastructure
Seniority: Sr. Manager level

Key Responsibilities

  • •Own core infrastructure design, operation, and evolution of the Kubernetes-based platform (EKS or similar) with multi-environment isolation.
  • •Manage supporting cloud resources (container registries, load balancers, queues, caches, data infra) to run APIs and agents.
  • •Design and maintain CI/CD pipelines for image builds and infra rollouts (Pulumi/Terraform + Helm/Docker) and implement safe rollout strategies (blue/green, canary, staged rollouts).
  • •Define and track SLOs/SLIs and improve observability (metrics, logs, traces, alerts); participate in on-call rotation and drive blameless post-mortems.
  • •Shape networking and security (VPCs, subnets, ingress/egress, IAM, secret management) for multi-tenant and on-prem/regulatory deployments.

Pay and Benefits

Salary: GBP 75,000 - 100,000 annually

Key Requirements

  • •5+ years building and operating production infrastructure on a major cloud (AWS, GCP, or Azure)
  • •Significant hands-on experience running Kubernetes in production (EKS/GKE/AKS or self-managed) including cluster upgrades, autoscaling, node group design, and multi-env setups
  • •Deep experience with infrastructure-as-code tools (Pulumi, Terraform, CDK, or similar)
  • •Strong scripting and programming skills in at least one modern language (TypeScript, Go, Python)
  • •Experience owning uptime and performance of user-facing systems and participating in on-call/incident management
Experience:5+ yearsCloudKubernetesSREIaC
Skills:Problem-solvingCommunicationTeamwork
Languages:English
Tech Stack:KubernetesAWSGCPTerraformPulumiCDKHelmDockerCI/CDPrometheusGrafanaCloudWatchOpenTelemetryPythonGoTypeScript

Eligibility

Work Authorization:Authorization required. Sponsorship not provided.

Company Brief

Cosine
Builds developer-focused tools and infrastructure for semantic search and vector embeddings, enabling teams to integrate fast, scalable similarity search and retrieval-augmented workflows into applications via APIs and managed services.
Industry: Data Infrastructure
Growth: Early Stage Startup
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