Senior Platform Engineer (London)

Opencoreos

United Kingdom Remote permanent

Posted: November 25, 2025

Required Skills

Job Description

About OpenCoreOS

• We're building the first open-source "Thin Ledger", designed to replace legacy core systems with a Golang-based, Protobuf-defined, event-driven platform powered by Kafka, Redis, and multi-region CockroachDB/YugabyteDB.

• Our platform is AI-native from the ground up: autonomous SRE agents, AI-generated runbooks, and everything-as-code—from policies to infrastructure definitions.

• We're mission-critical by default, targeting five-nines uptime and multi-region failover for regulated institutions.

• We work openly and fast, and colocate in Huckletree, Liverpool St, London for in-person collaboration, supported by async-friendly workflows.

What You Will Do

• Infrastructure: Build and scale multi-region Kubernetes infrastructure (EKS/GKE) for five-nines workloads.

• Architecture: Architect active-active distributed systems (Kafka, CockroachDB/YugabyteDB, Redis).

• GitOps: Implement Terraform, Helm, and GitOps (Flux/ArgoCD) across cloud and hybrid environments.

• Resiliency: Own DR, failover, backup/restore, and multi-region resiliency.

• Security: Drive zero-trust security, identity, multi-tenant isolation, and cryptographic audit trails.

• Observability: Build and maintain stacks using Prometheus, Grafana, and OTEL.

• AI-SRE: Lead AI-driven automation (auto-remediation, incident insights, AI-based root cause analysis).

• Deployment: Support on-prem/air-gapped deployments and legacy integrations.

Essential Skills

• Deep Kubernetes (EKS/GKE; operators/CRDs a bonus)

• Terraform (multi-cloud)

• GitOps (Flux or ArgoCD)

• Kafka / Event streaming

• Distributed SQL databases (CRDB, YugabyteDB)

• Prometheus, Grafana, OpenTelemetry

• DR, HA, and Zero-Trust architecture

• Language: Go (AI-accelerated development welcome)

Nice-to-Haves

• On-prem or hybrid cloud experience

• SOC2 / ISO / GDPR knowledge

• Financial systems experience

• Multi-cluster federation / Service mesh

Benefits Overview:

• 4 Weeks of PTO

• Medical & Dental Insurance

• Eligible for Sign on Bonus

• Pension

• Paid National Holidays

• Annual Bonus Eligibility

Why join us?

• Massive impact: Transform how T1 banks handle billions of transactions daily—on a truly open platform.

• High-caliber team: Join a small team of exceptional engineers who value both speed and stability.

• AI-native workspace: Experience an AI-first environment with LLMs integrated into every tool.

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