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.
GenAI Engineer (Python + GenAI + FastAPI) Location: Chennai Experience: 1–3 years Company: ThetaZero — Boutique tech company building trustworthy, human-centered solutions in AI, Cloud, Cybersecurity & Digitalization. About the Role ThetaZero is building a next-generation AI-powered platform that combines multimodal input processing and advanced GenAI workflows. We are looking for a passionate AI Backend Engineer who can own the complete backend and AI engine — including LLM pipelines, multimodal ingestion, contextual memory, embeddings, retrieval, and future agent-based automation. This is a builder’s role , perfect for someone who wants to see their work shape a global-scale product. Key Responsibilities Backend Engineering Design and develop scalable backend services using Python + FastAPI Build REST APIs consumed by mobile and web clients Implement secure user/session management Write modular, testable, production-ready backend code Ensure production-grade quality, testing, and version control GenAI Engineering Build chat flows, RAG pipelines, and contextual memory systems Design embeddings-based retrieval (text, voice, image) Implement structured reasoning and chain-of-thought workflows Craft and refine prompts; manage LLM efficiencies & cost AI Agents Implement agent-based workflows using: CrewAI, Autogen, Swarm, LangGraph Build multi-agent collaboration flows to automate complex tasks Multimodal Processing Voice → STT → embeddings pipeline PDF/Doc/Image ingestion with OCR & text extraction Metadata storage + indexing into vector DB Intelligent summarization, structuring, and tagging Infrastructure & DevOps Containerize services using Docker Collaborate with the DevOps team for Container Registry + Container Apps on Azure or AWS Contribute to the environment setup and optimization Monitoring, logging, performance tuning Basic understanding of Terraform (optional but good) Collaboration Work closely with the Flutter, React, and UI/UX teams Participate in architecture decisions and product brainstorming Own the backend roadmap and deliver features reliably Required Skills Strong hands-on experience with Python FastAPI / Flask (FastAPI preferred) Experience with OpenAI APIs, LLMs, and embeddings Knowledge of vector databases (Qdrant, Pinecone, MongoDB Vector Search, Chroma) Experience with LangChain / LlamaIndex Docker + Git fundamentals Strong problem-solving and debugging skills Good-to-Have Skills CrewAI, LangGraph, Autogen, Swarm (any one) Azure AI Services (Speech, Document Intelligence) Experience with Agents / tool-calling / function-calling Redis, Pub/Sub, message queues Azure Container Apps / ACR MLOps basics Who Will Be a Great Fit You enjoy building real products end-to-end You love Python, AI, and experimentation You prefer high-quality engineering over shortcuts You thrive in a startup environment with ownership and autonomy You want to work closely with a cross-functional team You want to grow quickly in a startup, building a global product You prefer a high-trust, high-quality engineering culture Why Join ThetaZero Build a nuanced AI platform from the ground up Exposure to Cloud, Security, AI Agents, and high-scale product architecture Be part of a high-trust team that values craftsmanship Growth opportunities across AI, DevOps, Cloud, and product engineering Direct mentorship from the founder