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# Senior Golang Engineer - Kubernetes Operators

- **Company:** Lawrence Harvey
- **Location:** Valladolid, Spain
- **Contract:** Permanent contract
- **Skills:** Kubernetes Security, Application Programming Interfaces (APIs), Build Automation, Common ISDN Application Programming Interface (CAPI), Cloud Computing Security, Cloud Engineering, Continuous Integration, Distributed Systems, Identity and Access Management, Key Management, Prometheus, RSA (Cryptosystem), Software Engineering, Policy as Code, SSL Certificate Management, Cloud Platform System, Grafana, Git Flow, Kubernetes, Infrastructure Automation Frameworks, Api Design, Terraform, Golang
- **Published:** September 6, 2026
- **Apply:** https://www.buscojobs.com.es/senior-golang-engineer-kubernetes-operators-en-valladolid-ID-370110053

## About the Role

Kubernetes Controllers, Operators or Kubernetes-native automation
.
Good understanding of Kubernetes APIs and
Custom Resource Definitions (CRDs)
.
Experience designing or working with
distributed systems and cloud-native architectures
.
Strong understanding of software engineering principles and API design.
Experience with CI/CD, automation and Infrastructure as Code.
Comfortable troubleshooting complex Kubernetes and platform-level problems.
Security & Secrets Experience
Experience in some of the following areas would be highly valuable:
Secrets Management
Key Management Systems / KMS
IAM
TLS and certificate management
Kubernetes security and cluster hardening
Key rotation
Encryption and applied cryptography
Secure communication between distributed services
Technologies You May Work With
Go / Golang · Kubernetes · Kubernetes API · CRDs · Controllers · Operators · Kubebuilder · controller-runtime · Cluster API · GitOps · ArgoCD · Terraform · Crossplane · KMS · Secrets Management · IAM · TLS · Prometheus · Grafana · OpenTelemetry
Exposure to cryptographic concepts such as
AES, RSA, ECDSA, HMAC, envelope encryption and DEK/KEK
is a strong plus.
Nice to Have
Experience with
Kubebuilder or controller-runtime
.
Experience with
Cluster API (CAPI)
or Crossplane.
Experience building Kubernetes platforms across
multiple clusters
.
Experience with secure, segmented or
air-gapped environments
.
Experience building internal developer platforms or self-service infrastructure.
Knowledge of multi-tenancy and policy-as-code.
Experience with OPA/Rego.
Strong understanding of applied cryptography and key-management architectures.
The Profile We're Looking For
You don't need to tick every box.
We're particularly interested in engineers who have a strong
Go + Kubernetes engineering background
and enjoy building the automation and software that sits behind a cloud platform.
If you have built
Kubernetes Controllers, Operators, CRDs or Kubernetes-native platform services

## Description

Senior Golang Engineer - Kubernetes Controllers & Secrets ManagementAbout the RoleWe are looking for aSenior Golang Engineerto join a cloud platform engineering team building highly automated, secure and scalable cloud-native infrastructure.This role sits at the intersection ofKubernetes engineering, platform automation and cloud security.You will work hands-on developingKubernetes Controllers and Operators in Go, automating the lifecycle of platform services and cloud resources, while contributing to secureSecrets Management and Key Management (KMS)capabilities used across the platform.This is not simply a role operating Kubernetes. We are looking for engineers interested inbuilding and extending Kubernetes itself through APIs, Controllers, Operators and automation.What You'll Be DoingKubernetes Controllers & Platform EngineeringDesign, develop and maintainKubernetes Controllers and Operators using Go/Golang.Build automation around Kubernetes resources usingCRDs and Kubernetes APIs.Automate the provisioning, configuration and lifecycle management of cloud and platform resources.Build reliable reconciliation and control-loop logic for distributed systems.Contribute tomulti-cluster Kubernetes environmentsand platform orchestration.Develop internal platform capabilities that enable engineering teams to consume infrastructure and services through automated, self-service workflows.Improve CI/CD, GitOps and Infrastructure-as-Code processes.Troubleshoot complex Kubernetes and distributed-system issues in production environments.Help ensure the reliability, scalability and observability of platform services.Secrets Management, KMS & SecurityDesign and develop services for secureSecrets and Key Managementwithin Kubernetes and cloud environments.Integrate secrets-management capabilities with Kubernetes workloads and platform services.Work withKMS, IAM, TLS/certificates and secure service-to-service communication.Implement secure key lifecycle processes including generation, storage, access andkey rotation.Contribute to platform and Kubernetes cluster hardening.Apply security best practices across highly automated and distributed environments.Work with cryptographic concepts such asenvelope encryption, DEK/KEK and encryption at rest/in transit.What We're Looking ForCore RequirementsStrong professional experience developing software withGo / Golang.Strong hands-on experience withKubernetesin production environments.Experience developingKubernetes Controllers, Operators or Kubernetes-native automation.Good understanding of Kubernetes APIs andCustom Resource Definitions (CRDs).Experience designing or working withdistributed systems and cloud-native architectures.Strong understanding of software engineering principles and API design.Experience with CI/CD, automation and Infrastructure as Code.Comfortable troubleshooting complex Kubernetes and platform-level problems.Security & Secrets ExperienceExperience in some of the following areas would be highly valuable:Secrets ManagementKey Management Systems / KMSIAMTLS and certificate managementKubernetes security and cluster hardeningKey rotationEncryption and applied cryptographySecure communication between distributed servicesTechnologies You May Work WithGo / Golang · Kubernetes · Kubernetes API · CRDs · Controllers · Operators · Kubebuilder · controller-runtime · Cluster API · GitOps · ArgoCD · Terraform · Crossplane · KMS · Secrets Management · IAM · TLS · Prometheus · Grafana · OpenTelemetryExposure to cryptographic concepts such asAES, RSA, ECDSA, HMAC, envelope encryption and DEK/KEKis a strong plus.Nice to HaveExperience withKubebuilder or controller-runtime.Experience withCluster API (CAPI)or Crossplane.Experience building Kubernetes platforms acrossmultiple clusters.Experience with secure, segmented orair-gapped environments.Experience building internal developer platforms or self-service infrastructure.Knowledge of multi-tenancy and policy-as-code.Experience with OPA/Rego.Strong understanding of applied cryptography and key-management architectures.The Profile We're Looking ForYou don't need to tick every box.We're particularly interested in engineers who have a strongGo + Kubernetes engineering backgroundand enjoy building the automation and software that sits behind a cloud platform.If you have builtKubernetes Controllers, Operators, CRDs or Kubernetes-native platform services, and you are interested in going deeper intoSecrets Management, KMS and cloud security, this could be a great fit.


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