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abhinavkr26104/README.md

Hi, I'm Abhinav Kumar Singh

Full-stack developer building reliable Java backends, React applications, and AI-powered tools

Portfolio LinkedIn Email LeetCode

About me

I'm a full-stack developer focused on designing clean APIs, scalable backend systems, and practical user experiences. My core stack is Java, Spring Boot, React, and MySQL, and I am currently exploring AI agents, LLM application development, microservices, and open-source engineering.

  • Building production-minded backend services and full-stack applications
  • Contributing fixes to open-source AI infrastructure and developer tooling
  • Practising data structures and algorithms consistently
  • Interested in backend, full-stack, and software engineering opportunities

Recent open-source contributions

Project Contribution Status
Headroom Closed a shared LiteLLM cloud client to prevent resource leaks (#2903) Merged
Headroom Closed the MCP memory backend cleanly during shutdown (#2905) Merged
Headroom Cancelled a periodic TOIN task during proxy shutdown (#2906) Merged
Omnigent Closed owned OpenAI Agents SDK clients correctly (#4508) Merged
Langfuse Added timeout handling for Lambda MicroVM sandbox requests (#15974) Open
OpenAI Java Prevented negative Retry-After values from causing invalid sleep delays (#855) Open

Featured projects

An explainable, real-time intrusion detection and response platform. It combines FastAPI, PostgreSQL, behavioral profiling, dynamic threat scoring, WebSockets, React, and local LLM-powered alert explanations.

A full-stack commerce application with a Java backend and a React + Vite frontend, covering product management, category filtering, inventory, cart workflows, and client-side state management.

A local, multi-stage LangChain agent that analyses candidate-job fit, generates personalised outreach, and runs a grounding review to reduce unsupported claims and hallucinations.

A Java implementation created to explore request distribution, backend selection, and the fundamentals of resilient service architecture.

Technical toolkit

Backend Frontend Data & Infrastructure AI & Developer Tools
Java, Spring Boot, Spring MVC React, JavaScript, HTML, CSS MySQL, PostgreSQL, Docker Python, LangChain, Ollama
REST APIs, Spring Security, JPA, Hibernate Vite, Context API Git, Maven, WebSockets LLM agents, prompt pipelines

Coding profiles

LeetCode

GeeksforGeeks solutions LeetCode solutions

Contribution snake

Abhinav's contribution snake

Resume

View my resume for a detailed overview of my experience, education, and projects.

Let's build something useful.

Open to collaborating on Java, Spring Boot, React, AI agents, and open-source projects.

Pinned Loading

  1. GeekForGeeks_me GeekForGeeks_me Public

    This repository serves as a collection of my solutions to various GeeksforGeeks Data Structures and Algorithms (DSA) problems, organized by the level of difficulty. - Created using [GfG To GitHub](…

    Java

  2. leetcode_me leetcode_me Public

    A collection of LeetCode questions to ace the coding interview! - Created using [LeetHub v2](https://github.com/arunbhardwaj/LeetHub-2.0)

    Java

  3. ThreatLens ThreatLens Public

    AI-powered cybersecurity threat monitoring dashboard

    Python 1

  4. cold-email-agent cold-email-agent Public

    Python