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AKSINGH-0704

★ 14 Open GitHub ↗

Applied ML + Systems Engineering • Autonomous workflows • Infrastructure-oriented AI systems

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<br/>

<h2>Abhishek Kumar Singh</h2>

<p><em>Applied AI Systems Engineering</em></p>

<p>
Backend infrastructure · Autonomous execution pipelines · AI evaluation systems · Applied ML
</p>

<br/>

[![LinkedIn](https://img.shields.io/badge/LinkedIn-Abhishek_Kumar_Singh-0A66C2?style=flat-square&logo=linkedin&logoColor=white)](https://www.linkedin.com/in/abhishek-kumar-singh-6a7b6a292)&nbsp;
[![Live Platform](https://img.shields.io/badge/Live_Platform-letszero.in-06D6A0?style=flat-square)](https://www.letszero.in/)&nbsp;
[![Open to Work](https://img.shields.io/badge/Open_to-Backend_%7C_AI_%7C_ML_Roles-7B61FF?style=flat-square)](https://www.linkedin.com/in/abhishek-kumar-singh-6a7b6a292)

<br/>

</div>

---

Backend systems and applied ML. Building production infrastructure, autonomous agent pipelines, and AI evaluation systems. Interested in roles where the backend actually matters, and in AI/ML work that goes beyond the wrapper layer.

</div>

---

<br/>

## Selected Systems

| System | Domain | Core Engineering |
|:-------|:-------|:----------------|
| **[LetsZero / RepMail](https://github.com/AKSINGH-0704/Let-sZero)** | Communication Infrastructure | BullMQ async execution, SES/SNS 4-step idempotency pipeline, hierarchical credit governance, dual-storage architecture |
| **[AURORA](https://github.com/AKSINGH-0704/aurora-autonomous-dev-system)** | Autonomous Agent Systems | Blueprint-as-contract 4-phase pipeline, self-healing validation loop, stateless shell chaining, bounded retry semantics |
| **[CleverPick](https://github.com/AKSINGH-0704/Cleaver_Pick)** | AI Evaluation Infrastructure | Concurrent LLM fan-out, composite R Score across 4 dimensions, Grok-2 independent judge, Wikipedia fact verification |
| **[PolicyLens](https://github.com/AKSINGH-0704/Team_Agents)** | RAG + Advisory Systems | 3-layer hybrid RAG, 8-type hidden clause detection, deterministic claim scoring, pgvector + tsvector RRF fusion |
| **[Brain Tumor MRI](https://github.com/AKSINGH-0704/Brain_tumor_MRI_classification)** | Applied ML / Computer Vision | CNN vs ResNet50 benchmark, false-negative aware evaluation, domain-sensitive scoring methodology |
| **[Zero-Trust Microrefinery](https://github.com/AKSINGH-0704/Zero-Trust-Microrefinery)** | IoT / Hardware Security | HMAC-SHA256 signed ESP32 commands, LangGraph orchestration, deterministic Safety Governor, replay-attack prevention |

</div>

<br/>

---

## Engineering Domains

<table width="100%">
  <tr>
    <td width="50%" valign="top">
      <b>Backend Infrastructure</b><br/>
      <sub>Node.js · FastAPI · Express · BullMQ · Redis · PostgreSQL · Prisma · Drizzle · AWS SES/SNS</sub>
      <br/><br/>
      Queue-based async execution · Idempotent event pipelines · Dual-storage architecture · Credit governance systems
    </td>
    <td width="50%" valign="top">
      <b>Autonomous Agent Systems</b><br/>
      <sub>LangChain · LangGraph · Claude Code · Multi-agent coordination · Blueprint-driven execution</sub>
      <br/><br/>
      Iterative validation recovery loops · Stateless shell orchestration · Bounded retry semantics · Artifact-contract pipelines
    </td>
  </tr>
  <tr><td colspan="2"><br/></td></tr>
  <tr>
    <td width="50%" valign="top">
      <b>AI Evaluation & RAG Systems</b><br/>
      <sub>pgvector · tsvector · RRF fusion · LLM-as-a-Judge · OpenAI · HuggingFace · Supabase</sub>
      <br/><br/>
      Hybrid retrieval architectures · Independent judge isolation · Composite reliability scoring · Hidden clause detection
    </td>
    <td width="50%" valign="top">
      <b>Applied ML & Computer Vision</b><br/>
      <sub>TensorFlow · Keras · ResNet50 · scikit-learn · OpenCV · Transfer Learning</sub>
      <br/><br/>
      Domain-aware evaluation methodology · False-negative sensitive scoring · Data-leakage prevention · Post-split normalization
    </td>
  </tr>
  <tr><td colspan="2"><br/></td></tr>
  <tr>
    <td width="50%" valign="top">
      <b>Frontend & Product</b><br/>
      <sub>React 18 · Next.js 14 · Vite · Tailwind CSS · Framer Motion · Recharts</sub>
      <br/><br/>
      SSE real-time streaming UIs · Animated evaluation interfaces · Multi-page SPA architecture
    </td>
    <td width="50%" valign="top">
      <b>Zero-Trust IoT & Hardware</b><br/>
      <sub>ESP32 · MQTT · HMAC-SHA256 · C++ · Arduino · INA219 · Python</sub>
      <br/><br/>
      Cryptographically signed hardware commands · Safety Governor enforcement · Replay-attack prevention
    </td>
  </tr>
</table>

<br/>

## Tech Stack

**Languages**

![Python](https://img.shields.io/badge/Python-3776AB?style=flat-square&logo=python&logoColor=white)&nbsp;
![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?style=flat-square&logo=typescript&logoColor=white)&nbsp;
![JavaScript](https://img.shields.io/badge/JavaScript-F7DF1E?style=flat-square&logo=javascript&logoColor=black)&nbsp;
![SQL](https://img.shields.io/badge/SQL-4479A1?style=flat-square&logo=postgresql&logoColor=white)&nbsp;
![C++](https://img.shields.io/badge/C++-00599C?style=flat-square&logo=c%2B%2B&logoColor=white)

**Backend**

![FastAPI](https://img.shields.io/badge/FastAPI-009688?style=flat-square&logo=fastapi&logoColor=white)&nbsp;
![Node.js](https://img.shields.io/badge/Node.js-339933?style=flat-square&logo=node.js&logoColor=white)&nbsp;
![Express](https://img.shields.io/badge/Express-000000?style=flat-square&logo=express&logoColor=white)&nbsp;
![BullMQ](https://img.shields.io/badge/BullMQ-FF6B6B?style=flat-square)&nbsp;
![Redis](https://img.shields.io/badge/Redis-DC382D?style=flat-square&logo=redis&logoColor=white)&nbsp;
![MQTT](https://img.shields.io/badge/MQTT-660066?style=flat-square&logo=mqtt&logoColor=white)

**Frontend**

![React](https://img.shields.io/badge/React_18-61DAFB?style=flat-square&logo=react&logoColor=black)&nbsp;
![Next.js](https://img.shields.io/badge/Next.js_14-000000?style=flat-square&logo=next.js&logoColor=white)&nbsp;
![Vite](https://img.shields.io/badge/Vite-646CFF?style=flat-square&logo=vite&logoColor=white)&nbsp;
![Tailwind](https://img.shields.io/badge/Tailwind_CSS-06B6D4?style=flat-square&logo=tailwindcss&logoColor=white)&nbsp;
![Framer Motion](https://img.shields.io/badge/Framer_Motion-0055FF?style=flat-square&logo=framer&logoColor=white)

**AI / ML**

![TensorFlow](https://img.shields.io/badge/TensorFlow-FF6F00?style=flat-square&logo=tensorflow&logoColor=white)&nbsp;
![Keras](https://img.shields.io/badge/Keras-D00000?style=flat-square&logo=keras&logoColor=white)&nbsp;
![OpenAI](https://img.shields.io/badge/OpenAI-412991?style=flat-square&logo=openai&logoColor=white)&nbsp;
![LangChain](https://img.shields.io/badge/LangChain-1C3C3C?style=flat-square&logo=langchain&logoColor=white)&nbsp;
![HuggingFace](https://img.shields.io/badge/HuggingFace-FFD21E?style=flat-square&logo=huggingface&logoColor=black)&nbsp;
![scikit-learn](https://img.shields.io/badge/scikit--learn-F7931E?style=flat-square&logo=scikit-learn&logoColor=white)

**Data & Infrastructure**

![PostgreSQL](https://img.shields.io/badge/PostgreSQL-4169E1?style=flat-square&logo=postgresql&logoColor=white)&nbsp;
![Supabase](https://img.shields.io/badge/Supabase-pgvector-3ECF8E?style=flat-square&logo=supabase&logoColor=white)&nbsp;
![SQLite](https://img.shields.io/badge/SQLite-003B57?style=flat-square&logo=sqlite&logoColor=white)&nbsp;
![Prisma](https://img.shields.io/badge/Prisma-2D3748?style=flat-square&logo=prisma&logoColor=white)&nbsp;
![AWS](https://img.shields.io/badge/AWS_SES%2FSNS-FF9900?style=flat-square&logo=amazon-aws&logoColor=white)

**Deployment & Tooling**

![Railway](https://img.shields.io/badge/Railway-0B0D0E?style=flat-square&logo=railway&logoColor=white)&nbsp;
![Vercel](https://img.shields.io/badge/Vercel-000000?style=flat-square&logo=vercel&logoColor=white)&nbsp;
![Render](https://img.shields.io/badge/Render-46E3B7?style=flat-square)&nbsp;
![Claude Code](https://img.shields.io/badge/Claude_Code-D97706?style=flat-square&logo=anthropic&logoColor=white)&nbsp;
![HMAC](https://img.shields.io/badge/Security-HMAC--SHA256-7B61FF?style=flat-square)

</div>

<br/>

---

## GitHub Activity

[![Activity Graph](https://github-readme-activity-graph.vercel.app/graph?username=AKSINGH-0704&theme=github-compact&bg_color=0d1117&color=06D6A0&line=06D6A0&point=FFB627&area=true&hide_border=true)](https://github.com/AKSINGH-0704)

</div>

<br/>

AKSINGH-0704

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