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Building
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Building
26 followers · 91 following

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Achievement: Pair ExtraordinaireAchievement: YOLOAchievement: Pull Sharkx2Achievement: Quickdraw

Achievements

Achievement: Pair ExtraordinaireAchievement: YOLOAchievement: Pull Sharkx2Achievement: Quickdraw

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JDevAman/README.md

👋 Hey, I'm Aman Kumar

Software Engineer • Backend & Distributed Systems

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I build production-grade backends with obsession over correctness, observability, and scalability.

Currently grinding enterprise Java (Spring Boot) after shipping a full fintech wallet in Node.js.

~2 years of experience • Strong in Java/Groovy pipelines (current role), Node.js/TypeScript distributed systems, Dockerized deployments.

🚀 Featured Projects

🏦 Kizo — Digital Wallet (Deployed & Dockerized)

High-concurrency fintech backend simulating real payment flows.

  • Engineered ACID-compliant double-entry ledger with row-level locking + idempotency keys
  • Stress-tested: 100 VUs → 70 RPS, 100% success (k6)
  • Bottleneck analysis: Argon2 CPU contention (P99 3.41s auth) → documented Redis + isolated auth fixes
  • Full monorepo (API + React + Astro + Workers) deployed on GCP with Docker/Nginx/CI-CD
  • Live: kizo.devaman.space • app.kizo.devaman.space • api.kizo-app.devaman.space

🌐 devSpace — Personal Portfolio

Modular Next.js + Tailwind site for technical writing & branding.

🛠 Tech Stack

Backend & Systems
Node.js • TypeScript • Express • PostgreSQL (Prisma + Raw SQL) • Redis/BullMQ • Java (learning) • Spring Boot (upcoming)

Infra & DevOps
Docker • GitHub Actions • GCP • Linux • Nginx

Frontend
React • Astro • Tailwind CSS

Observability
Prometheus • Grafana • Pino (structured logging)

📈 Current Focus (Feb 2026)

Enterprise backend mastery:

  • Java + Spring Boot (Payroll Engine project in progress)
  • Microservices patterns • Kubernetes basics • Advanced observability

📫 Connect

GitHub Stats

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  1. kizo kizo Public

    Payment Wallet System

    TypeScript

  2. learnSpace learnSpace Public

    MonoRepo for all learning details

    C++

  3. fitness-tracker fitness-tracker Public

    Designed and developed a feature-rich fitness tracker application using Angular, Firebase (Firestore), NgRx for state management, and Angular Material for a polished user interface.

    TypeScript

  4. itasc itasc Public

    Created iTasC, a CloudNote with features like CRUD operations, infinite scroll, search, and JWT authentication.

    JavaScript

  5. Currency-Converter Currency-Converter Public

    Created a Currency-Converter WebApp in React for basic currency conversion.

    JavaScript

  6. CalcMe CalcMe Public

    My Calculator made using HTML, CSS & Javascript.

    CSS