Senior Cyber Security Engineer - Remote

ENSEK builds the cloud‑native SaaS software that’s transforming how energy retailers operate, innovate and manage at scale. We help retailers lower operating costs, improve billing accuracy for consumers, and enhance customer experience through automation and AI‑driven insight, all underpinned by modern, cloud‑native architecture.

As a Senior Cyber Security Engineer you will embed security into the DNA of our B2B SaaS platform. You’ll partner with Engineering, SRE, Risk and Product to build security into every part of our product lifecycle, enabling high‑velocity delivery without ever compromising trust or resilience.

Define and enforce secure configurations, network segmentation, 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; Automate security checks, policy enforcement and remediation using IaC, CI/CD integrations and custom tooling where appropriate.
• Work with Risk, Legal and InfoSec to embed controls that support regulatory, privacy and contractual requirements across new territories.

~ Security controls aligned with regulatory and contractual requirements for current and new markets.

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.
• Detection and monitoring: 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.

• 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
• Remote‑first working environment (within the UK) with offices in London and Nottingham