Author: Devraj Sarkar

Cybersecurity Architect | Cloud-Native Defense | AI/ML Security | DevSecOps

๐–๐ข๐ญ๐ก ๐Ÿ๐Ÿ‘+ ๐ฒ๐ž๐š๐ซ๐ฌ ๐จ๐Ÿ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ญ๐ข๐ฌ๐ž ๐ข๐ง ๐œ๐ฒ๐›๐ž๐ซ๐ฌ๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ ๐š๐ง๐ ๐œ๐ฅ๐จ๐ฎ๐-๐ง๐š๐ญ๐ข๐ฏ๐ž ๐๐ž๐Ÿ๐ž๐ง๐ฌ๐ž, ๐ˆ ๐š๐ซ๐œ๐ก๐ข๐ญ๐ž๐œ๐ญ ๐ซ๐ž๐ฌ๐ข๐ฅ๐ข๐ž๐ง๐ญ ๐๐ข๐ ๐ข๐ญ๐š๐ฅ ๐ž๐œ๐จ๐ฌ๐ฒ๐ฌ๐ญ๐ž๐ฆ๐ฌ ๐›๐ฒ ๐ข๐ง๐ญ๐ž๐ ๐ซ๐š๐ญ๐ข๐ง๐  ๐™๐ž๐ซ๐จ ๐“๐ซ๐ฎ๐ฌ๐ญ, ๐ญ๐ก๐ซ๐ž๐š๐ญ ๐ข๐ง๐ญ๐ž๐ฅ๐ฅ๐ข๐ ๐ž๐ง๐œ๐ž, ๐š๐ง๐ ๐ฉ๐ซ๐จ๐š๐œ๐ญ๐ข๐ฏ๐ž ๐ซ๐ข๐ฌ๐ค ๐ฆ๐ข๐ญ๐ข๐ ๐š๐ญ๐ข๐จ๐ง ๐ข๐ง๐ญ๐จ ๐ž๐ฏ๐ž๐ซ๐ฒ ๐ฅ๐š๐ฒ๐ž๐ซ ๐จ๐Ÿ ๐ข๐ง๐Ÿ๐ซ๐š๐ฌ๐ญ๐ซ๐ฎ๐œ๐ญ๐ฎ๐ซ๐ž.

My journey began in network security (firewalls, IDS/IPS) and evolved through Linux/Windows hardening, IAM, and DevSecOpsโ€”bridging security with agile development. Today, I specialize in securing multi-cloud (AWS/Azure/GCP) environments. ๐€๐ฌ ๐š ๐ญ๐ซ๐ฎ๐ฌ๐ญ๐ž๐ ๐š๐๐ฏ๐ข๐ฌ๐จ๐ซ, ๐ˆ ๐ก๐ž๐ฅ๐ฉ ๐จ๐ซ๐ ๐š๐ง๐ข๐ณ๐š๐ญ๐ข๐จ๐ง๐ฌ: โœ”๏ธ Align security investments with business objectives (reducing TCO while maximizing cyber ROI). โœ”๏ธ Prioritize risks executives care aboutโ€”translating technical vulnerabilities into financial/operational impact. โœ”๏ธ Optimize team workflows by merging DevSecOps agility with governance rigorโ€”no more "security vs. speed" trade-offs. ๐‚๐จ๐ซ๐ž ๐’๐ญ๐ซ๐ž๐ง๐ ๐ญ๐ก๐ฌ & ๐ƒ๐ข๐Ÿ๐Ÿ๐ž๐ซ๐ž๐ง๐ญ๐ข๐š๐ญ๐ข๐จ๐ง: ๐˜Œ๐˜ฏ๐˜ฅ-๐˜ต๐˜ฐ-๐˜ฆ๐˜ฏ๐˜ฅ ๐˜ด๐˜ฆ๐˜ค๐˜ถ๐˜ณ๐˜ช๐˜ต๐˜บ ๐˜ข๐˜ณ๐˜ค๐˜ฉ๐˜ช๐˜ต๐˜ฆ๐˜ค๐˜ต๐˜ถ๐˜ณ๐˜ฆโ€”๐˜ง๐˜ณ๐˜ฐ๐˜ฎ ๐˜ฏ๐˜ฆ๐˜ต๐˜ธ๐˜ฐ๐˜ณ๐˜ฌ ๐˜ฉ๐˜ข๐˜ณ๐˜ฅ๐˜ฆ๐˜ฏ๐˜ช๐˜ฏ๐˜จ ๐˜ต๐˜ฐ ๐˜ˆ๐˜-๐˜ฅ๐˜ณ๐˜ช๐˜ท๐˜ฆ๐˜ฏ ๐˜ต๐˜ฉ๐˜ณ๐˜ฆ๐˜ข๐˜ต ๐˜ฅ๐˜ฆ๐˜ต๐˜ฆ๐˜ค๐˜ต๐˜ช๐˜ฐ๐˜ฏ. ๐Œ๐ฎ๐ฅ๐ญ๐ข-๐‚๐ฅ๐จ๐ฎ๐ ๐’๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ: Deep expertise in AWS/Azure/GCP security tools (Kubernetes, CSPM, CWPP). ๐“๐ก๐ซ๐ž๐š๐ญ ๐ˆ๐ง๐ญ๐ž๐ฅ๐ฅ๐ข๐ ๐ž๐ง๐œ๐ž & ๐…๐จ๐ซ๐ž๐ง๐ฌ๐ข๐œ๐ฌ: Proactive hunting, incident response, and post-breach analysis. ๐™๐ž๐ซ๐จ ๐“๐ซ๐ฎ๐ฌ๐ญ & ๐ˆ๐€๐Œ: Architecting least-privilege access, PKI, and micro-segmentation. ๐€๐ˆ/๐Œ๐‹ ๐’๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ: Securing LLMs, MLOps pipelines, and data lakes against adversarial attacks. ๐‘๐ž๐œ๐ž๐ง๐ญ ๐‚๐จ๐ง๐ฌ๐ฎ๐ฅ๐ญ๐ข๐ง๐  ๐๐ซ๐จ๐ฃ๐ž๐œ๐ญ๐ฌ โ€“ ๐€๐ ๐ž๐ง๐ญ๐ข๐œ ๐€๐ˆ & ๐€๐ˆ ๐’๐ž๐œ๐ฎ๐ซ๐ข๐ญ๐ฒ: โœ”๏ธ Led security architecture for a GenAIโ€‘powered Agentic AI system (autonomous taskโ€‘planning agents using LangChain & AutoGPT). Designed guardrails against prompt injection, toolโ€‘calling abuse, and data exfiltration via agentโ€‘toโ€‘agent communication. Result: Zero security breaches across 10k+ agentic transactions. โœ”๏ธ Advised a fintech firm on AI supply chain security โ€“ hardened their LLM fineโ€‘tuning pipeline (Hugging Face + AWS SageMaker) against model poisoning and backdoor attacks. Implemented realโ€‘time anomaly detection for model inputs using statistical outlier scoring.

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