Mrinal Manna

GTM Engineer @karbonbusiness (YC S21’) | Backend & Distributed Systems | Spec-driven development | Shipped Production AI Products | 3x Hackathon Winner

Karbon BusinessTex-TorchKB AIWex-Wizible AI

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I’m a Software Engineer focused on building scalable backend systems and full-stack products that go from idea to real users.

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I’ve shipped production features including a cross-platform Chrome extension, REST APIs with webhook-driven subscriptions, OAuth integrations, and token-aware AI pipelines that process 100K+ character transcripts with usage monitoring and billing accuracy. My work sits at the intersection of Backend Engineering, Full-Stack Development, and practical Generative AI integration — where system design, databases, APIs, and reliability matter as much as intelligence. I’ve built: • Multi-LLM orchestration engines that reduce single-model bias • RAG-based analytics platforms with vector search and semantic retrieval • Usage-based credit and billing systems with idempotent transactions • AI system design mentor that evaluates architectures like an interviewer I care deeply about clean architecture, scalability, and ownership — designing systems with proper validation, monitoring, and performance in mind. Hackathon winner, mentor, and builder at heart. I enjoy solving real engineering problems that involve APIs, databases, system design, and user-facing products. Core Skills: Backend Engineering • Full-Stack Development • REST APIs • System Design • PostgreSQL • Redis • js • js • FlaskAPI • Docker • AWS • RAG • Vector DB • OAuth • Webhooks • Scalable Systems