TL;DR

Senior Cyber Security Engineer (SaaS): Building and securing cloud-native B2B SaaS platforms with an accent on automated security controls, threat modelling, and infrastructure hardening. Focus on integrating security into CI/CD pipelines, driving cloud architecture resilience on AWS, and fostering a secure-by-design engineering culture.

Location: Fully Remote (UK-based team with offices in Nottingham and London)

Company

Ensek provides cloud-native SaaS solutions that transform how energy retailers operate, innovate, and manage at scale through automation and AI-driven insights.

What you will do

  • Collaborate with engineering and SRE teams to design secure solutions and perform threat modelling for cloud-native architectures.
  • Define and enforce security configurations for public cloud infrastructure, specifically AWS.
  • Automate security checks, policy enforcement, and remediation using IaC and CI/CD integrations.
  • Implement runtime protection, vulnerability management, and secrets management for containerized services.
  • Build monitoring, logging, and alerting systems to enhance detection and incident response capabilities.
  • Support compliance and regulatory requirements as the platform scales into new international territories.

Requirements

  • 5+ years of experience in cyber security within cloud-native, DevOps, or platform engineering environments.
  • Practical experience securing AWS services, including IAM, networking, and secrets management.
  • In-depth knowledge of securing Kubernetes and related orchestration tooling.
  • Proficiency in Infrastructure as Code tools such as Terraform or CloudFormation.
  • Strong automation and scripting skills using Python, Go, or Bash.
  • Experience with logging, metrics, and tracing stacks like SIEM, ELK, Opensearch, or Prometheus.

Culture & Benefits

  • Remote-first working environment with optional office access in London or Nottingham.
  • 25 days of annual leave plus bank holidays with an option to buy or sell 5 extra days.
  • Vitality Health Insurance providing private healthcare, virtual GP access, and mental health support.
  • Pension scheme with a 5% employer matched contribution.
  • Two volunteering days per year and regular team-wide events.