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About the Role
As a Senior Cyber Security Engineer, you will embed security into the B2B SaaS platform by partnering with Engineering, SRE, Risk, and Product teams. This hands-on role involves influencing architecture, automating security controls, strengthening detection and response, defining standards, leading threat modeling, and championing secure-by-design practices.
Responsibilities
- Collaborate with engineering and platform teams to design secure solutions, perform threat modeling, and review designs for cloud, container, and service-based architectures.
- Define and enforce secure configurations, network segmentation, and identity and access controls for public cloud (primarily AWS).
- Implement secure coding practices, vulnerability management, secrets management, and runtime protections for services and CI/CD pipelines.
- Build and maintain monitoring, logging, and alerting for security events; lead incident response and post-incident reviews.
- Support ENSEK’s 24/7 Incident Management processes to ensure security and stability for clients.
- Automate security checks, policy enforcement, and remediation using IaC, CI/CD integrations, and custom tooling.
- Work with Risk, Legal, and InfoSec to embed controls that support regulatory, privacy, and contractual requirements.
Requirements
- 5+ years’ experience in cyber security within cloud-native environments, DevOps, or platform engineering contexts.
- Practical experience securing AWS services, IAM, networking, KMS/secrets, and managed services.
- Experience securing Kubernetes and related tooling (runtime protection, admission controllers, image scanning).
- Hands-on experience with logging, metrics, and tracing for security use cases.
- Proficient with Terraform/CloudFormation and CI/CD integration to enforce policy and automate remediations.
- Hands-on experience with Secure Web Gateways, IDP, IDS, EDR, SAST, DAST, WAF technologies.
- Comfortable writing automation and tools in Python, Go, Bash, or similar languages.
Skills
- Cloud Security
- AWS
- IAM
- Networking
- KMS
- Secrets Management
- Kubernetes Security
- Runtime Protection
- Admission Controllers
- Image Scanning
- Logging
- Metrics
- Tracing
- Terraform
- CloudFormation
- CI/CD
- Secure Web Gateways
- IDP
- IDS
- EDR
- SAST
- DAST
- WAF
- Python
- Go
- Bash
- Threat Modeling
- Secure Coding
- Vulnerability Management
- Incident Response
- Automation
- Infrastructure as Code (IaC)
Location
- Remote (within the UK)
Work Type
- Remote-first
- Full-time
Experience Level
- Senior
Benefits
- 25 days’ holiday + bank holidays
- Option to buy or sell 5 extra annual leave days per year
- Vitality Health Insurance, including private healthcare, virtual GP access and mental-health support
- Pension with 5% matched contribution
- Regular team-wide and company-wide events
- 2 volunteering days per year
About the Company
- ENSEK builds cloud-native SaaS software transforming how energy retailers operate, innovate, and manage at scale.
- ENSEK helps retailers lower operating costs, improve billing accuracy for consumers, and enhance customer experience through automation and AI-driven insight.
- The company operates with a modern, cloud-native architecture and is scaling towards new international horizons.
- ENSEK is looking for individuals driven by solving complex, real-world problems who want to protect resilient, cloud-native platforms accelerating the global energy transition.