SENIOR SOFTWARE ENGINEER @ CAPGEMINI

Anil Kumar Rana

Senior Software Engineer · MuleSoft & Java

Building scalable backend systems, APIs & production applications.

2+ years of professional software engineering experience, with a focus on Java, Spring Boot, backend engineering, REST APIs, and enterprise API integration.

Java 21Spring BootREST APIsPostgreSQLRedisMuleSoft 4.9Docker

Simulate OrderFlow View Projects Resume Contact Me

GitHub↗LinkedIn↗YouTube↗Email↗

BACKGROUND & NARRATIVE

About Me — Senior Software Engineer

Anil Kumar Rana

Senior Software Engineer @ Capgemini

whoami --verbose

Senior Software Engineer delivering high-throughput backend services and enterprise API integrations.

I am a Senior Software Engineer at Capgemini (promoted Mar 2025) with over 2 years of professional software engineering experience. I lead API-led connectivity initiatives using MuleSoft 4.9, DataWeave 2.0, and architect high-throughput Spring Boot microservices.

My engineering focus combines enterprise integration with modern Java backend engineering — including Spring Security JWT authentication, pessimistic database locking, Redis caching, and CI/CD automation. I also actively mentor junior engineers, conduct technical knowledge sharing sessions, and teach software engineering fundamentals.

Java 21 & Spring Boot Microservices

MuleSoft 4.9 & DataWeave 2.0 Pipelines

REST API Security & JWT Rotation

PostgreSQL Pessimistic DB Locking

Redis Cache-Aside Strategy

Jenkins & GitHub Actions CI/CD

Years Software Exp.

Capgemini & Enterprise

Senior SE

Role Designation

MuleSoft & Java

300+

DSA Solved

LeetCode & CodeVita

+40%

Backend Performance

High-Throughput APIs

AI KNOWLEDGE ASSISTANT

Want to know more about Anil? Ask his AI Assistant!

Get instant, verified answers about Anil's 2+ years of professional engineering experience at Capgemini, his Java & Spring Boot backend projects, OrderFlow architecture, teaching work, or career goals.

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SOCIAL PROOF & RECOMMENDATIONS

Professional Feedback

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Authentic Social Proof Standard

PROFESSIONAL TIMELINE

Work Experience

2+ years of professional software engineering experience delivering enterprise API integrations and Spring Boot backend systems.

Senior Software Engineer — MuleSoft & Java

CURRENT ROLE

Capgemini

Sep 2024 – Present (Promoted Mar 2025)

Architect and deliver high-throughput Spring Boot microservices, improving backend performance by 40% across enterprise integration systems.

Lead API-led connectivity initiatives using MuleSoft 4.9, DataWeave 2.0, and layered Experience/Process/System API architecture.

Reduced integration failures by 35% through systematic error handling, retry logic, and robust MuleSoft pipeline design.

Govern API security via Mule Gateway policies; integrate ActiveMQ messaging queues and LDAP directory services.

Mentor junior engineers, conduct knowledge-transfer sessions, and drive enterprise integration standards.

Champion CI/CD improvements using Jenkins and Bitbucket, cutting deployment cycle time by 25%.

Java 21Spring BootMuleSoft 4.9DataWeave 2.0RAMLActiveMQPostgreSQLJenkins CI/CD

Frontend Developer Intern

SimpleByte

Mar 2024 – May 2024

Built responsive web application components using React.js and Tailwind CSS.

Improved component render performance by 30% through optimized state handlers and memoization.

Collaborated on cross-browser user experience and REST API endpoint integration.

React.jsTailwind CSSJavaScriptREST APIs

★ FLAGSHIP BACKEND ENGINEERING SHOWCASE

OrderFlow — E-Commerce Backend Engine

A production-oriented Spring Boot backend built with Java 21, PostgreSQL, Redis, Spring Security JWT, Docker, and Razorpay Webhooks. Designed for inventory concurrency control, transactional integrity, and idempotency.

Interactive System Request SimulatorSIGNATURE INTERACTION

Click below to trace a live POST /orders request traveling through OrderFlow architecture.

GitHub Repo ↗

ClientIDLE

1. Client Request

POST /api/v1/orders

Payload: { productId: 402, quantity: 2, price: 149.99 }

Spring SecurityIDLE

2. Controller & JWT Auth

AuthFilter

JWT Signature Verified & Refresh Token Rotation Validated ✓

OrderServiceIDLE

3. Service Core Engine

Price Validation

Server-side price verification against DB price ($149.99) ✓

JPA RepositoryIDLE

4. Pessimistic DB Lock

Pessimistic Lock

SELECT * FROM product_inventory WHERE id=402 FOR UPDATE

PostgreSQLIDLE

5. PostgreSQL Transaction

DB Transaction

INSERT INTO orders (id, status) VALUES ('ord_992', 'PENDING')

Redis CacheIDLE

6. Redis Cache Invalidate

Cache-Aside

Evicted stale cache key 'product:402:stock'

Payment GatewayIDLE

7. Razorpay Webhook

HMAC-SHA256

Verified payment webhook signature with secret key ✓

ResponseIDLE

8. Order Completed

HTTP 201 Created

Order #ord_992 successfully persisted and confirmed ✓

ORDERFLOW LIVE TELEMETRY CONSOLE

SPRING BOOT 3.2 · JAVA 21

Ready to execute. Click "▶ Run Order Simulation" above to trace request execution.

Pessimistic Concurrency Locking

Uses SQL PESSIMISTIC_WRITE locks during order creation to prevent inventory overselling when multiple concurrent users purchase the last item simultaneously.

Redis Cache-Aside Pattern

Accelerates product lookup latency by caching catalog data in Redis. Automatic cache invalidation triggers upon stock updates to ensure strict data consistency.

Razorpay Webhook HMAC Verification

Verifies payment webhook authenticity via HMAC-SHA256 signature calculations, ensuring payment status callbacks cannot be spoofed or duplicated.

SYSTEM DESIGN PHILOSOPHY

How I Build Production Systems

Software engineering is more than just writing code — it is about reliability, concurrency safety, security, and maintainability.

Correctness & Consistency

PILLAR 01

ACID Transaction Management (@Transactional)

Pessimistic & Optimistic DB Locking for Concurrency

Flyway Database Migrations & Versioning

Server-Side Price & Payload Validation

Performance & Scalability

PILLAR 02

Redis Cache-Aside & Ejection Strategies

Database Indexing & Query Plan Optimization

HikariCP Connection Pool Tuning

Asynchronous Event Dispatching

Security & Authorization

PILLAR 03

Stateless JWT Auth with Refresh Rotation

HMAC-SHA256 Webhook Signature Verification

Role-Based Access Control (RBAC)

OWASP API Security Best Practices

Reliability & Resilience

PILLAR 04

Idempotency Key Headers for Duplicate Requests

Global Controller Exception Handlers

Circuit Breakers & Exponential Backoff Retries

Automated Testcontainers Integration Tests

TECHNICAL PROFICIENCY

Skills & Technology Constellation

Click any category below to smoothly navigate to the corresponding skill cluster.

Backend & Core

Java 21

Spring Boot

REST APIs

Spring Security

JPA / Hibernate

MuleSoft

DataWeave 2.0

RAML

Databases & Caching

PostgreSQL

Redis

AWS RDS

MySQL

MongoDB

System Architecture

Microservices

API Design

Concurrency Locking

Cache-Aside Pattern

Idempotency

Flyway Migrations

DevOps & Tools

Docker

GitHub Actions

Git

Postman

Frontend Background

React.js

Next.js

TypeScript

JavaScript

Tailwind CSS

AI & Emerging Tech

GenAI

Claude AI

Spring AI

RAG Concepts

LLM Integration

SOFTWARE SHOWCASE

Engineering Projects

A preserved collection of software projects representing my backend engineering focus and development journey.

backend★ FLAGSHIP

OrderFlow (E-Commerce Backend Engine)

Production-Oriented Spring Boot Backend Engine

A high-performance Java 21 & Spring Boot 3.x backend implementing JWT auth with refresh token rotation, pessimistic row-level DB locking for concurrency control, Redis cache-aside invalidation, API idempotency, and Razorpay HMAC-SHA256 webhook verification.

Java 21Spring BootPostgreSQL

Details →

fullstack

ShoppingAdda (E-Commerce Platform)

Full-Stack Web Store with Authentication & Payments

Full-stack e-commerce web application featuring user authentication with OAuth Google Sign-In, interactive product catalog, shopping cart management, state persistence, chatbot integration, and payment checkout flow.

React.jsTailwind CSSFirebase Auth

Details →

frontend

YouTube Clone Platform

REST API-Driven Video Streaming Application

Frontend video application built with React, demonstrating component-driven architecture, REST API integration, live search query debouncing, responsive video player controls, and category feed filtering.

React.jsREST APIsTailwind CSS

Details →

frontend

Animate-On-Scroll Web Product

Interactive Landing Experience with Scroll Animations

Interactive web landing showcase focused on high-performance scroll triggers, Framer Motion viewport reveals, clean typography hierarchy, and smooth layout composition.

React.jsFramer MotionTailwind CSS

Details →

frontend

Interactive Quiz Web Application

API-Driven Real-Time Quiz Engine

Real-time interactive quiz application using vanilla Web APIs, dynamic DOM manipulation, score state tracking, timed progress handlers, and asynchronous trivia endpoint fetching.

JavaScriptHTML5CSS3

Details →

frontend

TravelEase Booking Interface

Modular React Travel & Tour Exploration Platform

Modular travel destination platform designed for exploring tour packages, filtering locations dynamically, managing booking details, and displaying custom modal UI views.

React.jsJavaScriptCSS Modules

Details →

frontend

Todos List Task Manager

Lightweight Task Management & LocalStorage Persistence App

Lightweight task management web application built with React and Tailwind CSS featuring local browser storage persistence, status filters, task creation, and instant deletion.

React.jsTailwind CSSLocalStorage API

Details →

KNOWLEDGE SHARING & MENTORSHIP

Teaching & Mentorship

Online Java & Backend Engineering Mentor

10+ Students Mentored

LIVE ONLINE SESSIONS

Currently mentoring 10+ students through online sessions focused on Java, Spring Boot, backend development, and practical software engineering. I also help learners build strong technical foundations and navigate their transition into software engineering careers.

MENTORSHIP FOCUS AREAS

Java Core & OOP Fundamentals

Spring Boot & RESTful Microservices

Relational Databases & JPA / Hibernate

Git, GitHub & Code Collaboration

System Design & Clean Code Practices

IT Career Guidance & Transition Support

Inquire for MentorshipIndividual & Group Sessions

YOUTUBE CHANNEL

WebTechNil

@webtechnil

Building WebTechNil — developer content on Java 21, Spring Boot, backend development architecture, and practical career guidance coming soon.

Visit WebTechNil ↗

CONTINUOUS EVOLUTION

Currently Building & Learning⚡

Q3/Q4 2026 FOCUS

Advanced Java 21 & Concurrency

Deep diving into Virtual Threads (Project Loom), Structured Concurrency, Scoped Values, and JVM Memory Tuning for low-latency backend execution.

Spring AI & RAG Engineering

Building retrieval-augmented generation (RAG) pipelines in Java using Spring AI, vector database embeddings, and LLM orchestration.

Distributed Systems Architecture

Mastering distributed locking algorithms, event-driven message queuing, rate limiters, and fault-tolerant microservice resiliency patterns.

DSA & System Design Mastery

Consistently solving complex algorithmic challenges (300+ solved) and studying production system blueprints from top engineering blogs.