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I’m Grant Totinov, a full-stack engineer focused on building reliable, secure products with .NET and modern React/TypeScript. I contribute to high-impact open-source projects like ASP.NET Core and I enjoy collaborating with maintainers on framework-level security, authentication/authorization, middleware, and developer experience. Beyond core web development, I build practical AI applications—designing RAG pipelines, vector retrieval workflows, and user-facing chat/document experiences using tools like .NET 8, React, Ollama, and LLM providers. I also ship real-world TypeScript products (from OAuth-integrated chat export tooling to editor and UI improvements) and I’m a continuous learner who loves turning complex systems into dependable, usable software.…I’m Grant Totinov, a full-stack engineer focused on building reliable, secure products with .NET and modern React/TypeScript. I contribute to high-impact open-source projects like ASP.NET Core and I enjoy collaborating with maintainers on framework-level security, authentication/authorization, middleware, and developer experience. Beyond core web development, I build practical AI applications—designing RAG pipelines, vector retrieval workflows, and user-facing chat/document experiences using tools like .NET 8, React, Ollama, and LLM providers. I also ship real-world TypeScript products (from OAuth-integrated chat export tooling to editor and UI improvements) and I’m a continuous learner who loves turning complex systems into dependable, usable software.

Grant Totinov

Software Engineer, Full Stack Developer, Back-End Developer, +2

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I’m Grant Totinov, a full-stack engineer focused on building reliable, secure products with .NET and modern React/TypeScript. I contribute to high-impact open-source projects like ASP.NET Core and I enjoy collaborating with maintainers on framework-level security, authentication/authorization, middleware, and developer experience. Beyond core web development, I build practical AI applications—designing RAG pipelines, vector retrieval workflows, and user-facing chat/document experiences using tools like .NET 8, React, Ollama, and LLM providers. I also ship real-world TypeScript products (from OAuth-integrated chat export tooling to editor and UI improvements) and I’m a continuous learner who loves turning complex systems into dependable, usable software.…I’m Grant Totinov, a full-stack engineer focused on building reliable, secure products with .NET and modern React/TypeScript. I contribute to high-impact open-source projects like ASP.NET Core and I enjoy collaborating with maintainers on framework-level security, authentication/authorization, middleware, and developer experience. Beyond core web development, I build practical AI applications—designing RAG pipelines, vector retrieval workflows, and user-facing chat/document experiences using tools like .NET 8, React, Ollama, and LLM providers. I also ship real-world TypeScript products (from OAuth-integrated chat export tooling to editor and UI improvements) and I’m a continuous learner who loves turning complex systems into dependable, usable software.

Available to hire

I’m Grant Totinov, a full-stack engineer focused on building reliable, secure products with .NET and modern React/TypeScript. I contribute to high-impact open-source projects like ASP.NET Core and I enjoy collaborating with maintainers on framework-level security, authentication/authorization, middleware, and developer experience.

Beyond core web development, I build practical AI applications—designing RAG pipelines, vector retrieval workflows, and user-facing chat/document experiences using tools like .NET 8, React, Ollama, and LLM providers. I also ship real-world TypeScript products (from OAuth-integrated chat export tooling to editor and UI improvements) and I’m a continuous learner who loves turning complex systems into dependable, usable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Bulgarian

Fluent

English

Advanced

Danish

Beginner

Work Experience

Engineer (End-to-End AI Document Q&A Platform) at AI Doc Chat

January 1, 2026 - Present

Built an end-to-end intelligent document Q&A system that turns unstructured PDF/TXT into an interactive knowledge base using a 5-stage RAG pipeline: ingestion, chunking, embedding generation, vector retrieval, and LLM-based answer generation. Implemented with .NET 8, React, Ollama, and Groq/Llama.

Founder/Developer (Side Project) at GPTChatDownloader

January 1, 2026 - Present

Designed and built a cross-browser AI chat export tool for Chrome and Firefox. Delivered an API-based conversation-tree reconstruction pipeline and integrated GitHub OAuth to reliably extract long, branched chat sessions. Reached 60+ users within one week after release.

Open Source Contributor (UI/Editor Improvements) at Tiptap

January 1, 2026 - Present

Implemented bug fixes and UI/editor improvements for Tiptap using TypeScript and React-oriented development practices. Contributed via pull requests based on issue investigation, improving rich-text editor behavior and user experience in real-world workflows.

Open Source Contributor (Bug Fixes & Enhancements) at Spectre.Console

January 1, 2026 - Present

Engineered bug fixes and enhancements for Spectre.Console by analyzing issues, implementing iterative pull requests, and collaborating with maintainers and community contributors. Improved reliability and developer-facing behavior of a widely adopted .NET library with large NuGet usage, using strong testing and defensive engineering practices.

Software Engineer | .NET & React Full-Stack (Open Source Contributor) at Microsoft ASP.NET Core

January 1, 2026 - Present

Contributed to ASP.NET Core across security and framework engineering areas, working with Microsoft engineers and maintainers. Focus included Passkeys/WebAuthn concepts (COSE, authentication/authorization flows), Identity-related security behaviors, and antiforgery. Also worked on middleware, endpoint routing, authorization metadata, typed results, API metadata, defensive validation, and unit/integration testing. Supported public API evolution and framework-level bug fixing for developer experience and security hardening.

Architect (University Social Platform - Master’s Thesis) at AcademiX

January 1, 2025 - December 31, 2025

Architected and presented a university-wide digital platform targeting 3,300+ students, consolidating events, clubs, posts, chat, and study material sharing. Built as a React Native ecosystem with role-based access, offline-first capabilities, and a scalable architecture to support student collaboration.