Web3 Jobs in Sofia, Bulgaria

We are looking for a Security Engineer to own and continuously improve the security posture of our cloud infrastructure, CI/CD pipelines, and production systems.

This is a deeply technical role focused on preventative security, secure-by-default platforms, and automation-first controls — working closely with Platform, DevOps, and Engineering teams. You'll design and operate security tooling across cloud infrastructure, Kubernetes, and CI/CD pipelines, with a strong emphasis on building production-grade security software using Python.

Responsibilities

• Build production-grade security applications and services using Python
• Develop internal security platforms and tooling from scratch
• Create security APIs and integrations with existing systems
• Build automation to detect misconfigurations, enforce security baselines and automate security reviews and alerts
• Design and implement AI-powered security integrations
• Design and enforce secure cloud architectures (AWS)
• Implement policy enforcement for IAM least-privilege models, secrets management (e.g., Vault, SSM, Sealed Secrets) and security groups and private networking
• Secure CI/CD pipelines (GitHub Actions) to prevent secret leakage and enforce signed artifacts and immutable builds
• Own code and artifact scanning: SAST / DAST, dependency & SBOM scanning, container image scanning
• Define security gates that balance developer velocity and risk
• Improve runtime security controls: detection of suspicious activity and abuse prevention
• Policy enforcement in production
• Partner with teams on threat modeling and secure design reviews
• Support incident response and post-mortems from a security perspective
• Drive continuous improvement from security incidents and near-misses
• Lead technical aspects of security incident investigations

Requirements

• Strong experience in Infrastructure / Platform / Cloud Security
• Advanced Python development skills (not just scripting—building production software)
• Hands-on with CI/CD security tooling
• Experience building security applications and platforms
• Software design patterns and engineering best practices
• Cloud platforms: AWS
• Kubernetes
• CI/CD systems
• Infrastructure as Code
• Python software development (APIs, services, tooling)
• Automation-first, not manual checklists
• Strong communicator who can influence engineers
• Comfortable operating in fast-moving, production environments
• Software engineering mindset applied to security problems

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