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Cyber Security Engineer
Cyber Security EngineerThetaZero Private Limited • Chennai, Republic Of India, IN
Cyber Security Engineer

Cyber Security Engineer

ThetaZero Private Limited • Chennai, Republic Of India, IN
15 hours ago
Job description

Cyber Security Engineer (1–3 Years Experience)

ThetaZero is a boutique technology company specializing in secure, cloud-native, AI-powered solutions for global clients.

We are looking for a hands-on Cybersecurity Engineer who can strengthen our internal and external security posture, take complete ownership of our cyber hygiene, and ensure our growing product ecosystem is secure by design.

This is a role for someone who loves security, wants to work closely with founders and engineering teams, and is excited to build security from the ground up in a fast-scaling environment.

What You Will Own

1. Internal Security (Operational Security)

  • Endpoint protection : manage Sophos EDR, triage alerts, and isolate devices when needed.
  • Email security : phishing protection, DMARC / SPF / DKIM validation, phishing simulations.
  • Ransomware defence : backups, isolation playbooks, recovery testing.
  • Daily monitoring : logs from endpoints, laptops, internal network, outbound traffic.

2. External Security (App, Cloud & Network Security)

  • Secure our Node.Js, Express, React apps before production :
  • OWASP Top 10
  • Secure headers
  • API hardening
  • Rate limiting
  • Dependency scanning (npm, pip, Snyk, etc.)
  • Secure databases (MongoDB Atlas / CosmosDB) : RBAC, private endpoints, audit logs.
  • Cloud Security (AWS / Azure / GCP) :
  • Secure cloud networks (VPC / VNET, subnets, routing, firewall rules).
  • Implement IAM security (least privilege, MFA, RBAC, access governance).
  • Protect secrets using Key Vault / KMS / Secret Manager.
  • Configure private endpoints, security groups, and network isolation.
  • Assist teams with secure CI / CD pipelines across any cloud environment.
  • Secure CI / CD and infrastructure pipelines.
  • 3. Threat & Vulnerability Management

  • Track CVEs relevant to our tech stack (Node.Js, React, MongoDB, Python, Azure).
  • Keep libraries and packages updated (dependency health monitoring).
  • Perform regular vulnerability scans (DAST / SAST) and coordinate fixes.
  • 4. Compliance & Governance

  • Implement security policies, asset inventory, and access control process.
  • Help with audits, documentation, risk tracking, and incident response playbooks.
  • Who We Are Looking For

    Must-Have Skills

  • Strong fundamentals in Application Security, Network Security, and Cloud Security.
  • Experience securing web apps (Node.Js, React) and APIs.
  • Experience with Cloud (VNETs / VPCs, IAM, Key Vault, Private Endpoints, NSGs).
  • Good understanding of SIEM, log analysis, and incident response.
  • Hands-on with Linux, networking, firewalls, and endpoint protection tools.
  • Ability to monitor alerts and respond quickly with minimal guidance.
  • Good-to-Have Skills

  • Knowledge of ISO 27001 / SOC2
  • Experience with SAST / DAST tools
  • Exposure to Azure Sentinel, Wazuh, ELK, or similar SIEM
  • Understanding of DevSecOps principles
  • Your Mindset

  • You treat security as your ownership — not a checklist.
  • You stay updated with CVEs and emerging threats.
  • You enjoy investigating root causes, not just fixing symptoms.
  • You communicate clearly with developers, founders, and Ops teams.
  • What You’ll Get at ThetaZero

  • Build security foundations for multiple cloud-native, AI-first products.
  • Freedom to set standards, introduce tools, and lead cyber initiatives.
  • A fast-paced, respectful environment where security is truly valued.
  • Create a job alert for this search

    Cyber Security Engineer • Chennai, Republic Of India, IN

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