Cyber Security Engineer

11 hours ago

tamil nadu, India ThetaZero Private Limited Full time

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 Own1. 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 10Secure headersAPI hardeningRate limitingDependency 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 ManagementTrack 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 & GovernanceImplement security policies, asset inventory, and access control process.Help with audits, documentation, risk tracking, and incident response playbooks. Who We Are Looking ForMust-Have SkillsStrong 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 SkillsKnowledge of ISO 27001 / SOC2Experience with SAST/DAST toolsExposure to Azure Sentinel, Wazuh, ELK, or similar SIEMUnderstanding of DevSecOps principlesYour MindsetYou 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 ThetaZeroBuild 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.

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