Resume

Lead Backend Engineer & Engineering Director

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Phone: +91-9340158116

Email: arjun@arjunthakur.dev

LinkedIn: linkedin.com/in/thakurarjun247

GitHub: github.com/thakurarjun247

Summary

  • Hands-on Lead Backend Engineer with 10 years of experience
  • Built scalable software solutions in multicultural environments at top tech companies like Amazon and Agoda, and high-growth startups across India, Southeast Asia, and the USA
  • Strong domain expertise in fintech, payment systems, crypto, e-commerce, travel, real estate, and edutech with a track record of delivering scalable solutions in these industries

Key Skills

Backend Languages & Frameworks

Java 20, Spring Boot, Spring Security, Hibernate JPA

Architecture (HLD)

Microservices Architecture, Distributed System Design, Scalability

Design (LLD)

Design Patterns, SOLID Principles, Clean Code

Database Skills

NoSQL, Cassandra, RDBMS, PostgreSQL, SQL, Redis, DynamoDB

Cloud Computing

AWS Certified Solutions Architect, S3, ECS, IAM, Lambda, Serverless

DevOps

Docker, Kubernetes, Kafka, Git, Jenkins, Linux, Grafana, ELK

Frontend Technologies

TypeScript, JavaScript, HTML, CSS

Leadership & Mentorship

Strategic Planning, Team Growth (Hiring, Development), Cross-Functional Collaboration, Stakeholder Management, Agile and Scrum Practices

Testing & Quality

Test Driven Development, JUnit, Mockito

AI Assisted Development

GitHub Copilot, SonarQube

Other

Data Structures and Algorithms, REST

Employment

Director – Full Stack Development

PhysicsWallah | Bengaluru

Nov 2024 – Present
  • Hired and led a team of 15 engineers to build an in-house Learning Management System (LMS) using Java, Spring, Hibernate, TypeScript, Microservices and AWS
  • Implemented CI/CD pipelines with Jenkins and Docker, improving deployment frequency by 15%
  • Relocated to Indore to support family stability and my child's education

Sabbatical

Personal Projects & Learning

Nov 2023 – Oct 2024
  • Built a production-grade full-stack flash sale system based on Microservices architecture, simulating real-world concurrency and scaling challenges
  • Upgraded technical stack to Java 20, React, TypeScript with hands-on implementation

Senior Engineering Manager (Contract)

ForaySoft

Mar 2023 – Oct 2023
  • Led 10 engineers on a fixed-term project to migrate Wayfair's seller promotions microservice using Java, Spring Security, Hibernate, AWS, TypeScript, PostgreSQL, Docker, and AWS, cutting system failures by 28%
  • Enhanced system scalability by implementing Kubernetes, supporting a 25% increase in transaction volume during e-commerce promotions

Vice President (Hands-on)

Nolan EduTech | Remote

Oct 2021 – Nov 2022
  • Generated revenue of 30 crore Indian Rupees (3.6 million US Dollars) in just one year by launching a new coding bootcamp vertical using Java, Spring, JPA, AWS, Microservices, TypeScript, JavaScript, HTML, and CSS
  • Rearchitected an online test portal (similar to HackerRank) using Java, SpringBoot, and AWS, improving scalability and user experience

Lead Developer

CoinSwitch Kuber | Remote

Dec 2020 – Oct 2021
  • Migrated monolithic crypto app to microservices using Python, FastAPI, Django, and AWS
  • Implemented Redis query caching, reducing query latency by 30%
  • Optimized PostgreSQL with PgBouncer connection pooling, cutting query latency by 40% and resolving connection blocking
  • Ensured system stability during a user surge from 600,000 to 10,000,000

Software Development Engineer 2

Amazon | Chennai

Jul 2019 – Oct 2020
  • Enhanced payment security against cross-site request forgery attacks, reducing impact by 19.7%
  • Architected a throttling system, with DynamoDB and Java, achieving a 15.3% reduction in coupon code misuse within the first month post-release
  • Improved accessibility of the Amazon payment page for differently-abled users and search engines by optimizing background-foreground contrast across diverse geographies and devices
  • Integrated Amazon Games payment flow into the Digital Payments Platform using Java and AWS, streamlining user transactions

Contractor/SDE

Various Clients | Seattle/Bengaluru

Nov 2017 – Mar 2019
  • Built a service from scratch to integrate Porch.com's backend systems with Facebook Marketplace
  • Doubled service quote requests, increased revenue by 13% by tapping into 200 million Facebook users
  • Optimized MongoDB analytics sorting with Python scripts for Domino, improving response time by 30%

Sr. Software Developer

Agoda.com | Bangkok

Aug 2016 – Aug 2017
  • Engineered an in-house A/B testing solution that processed millions of messages using Scala, Cassandra, and Kafka, resulting in 22% faster insights for product managers
  • Developed shared libraries using Scala, increasing the number of tracked users by 10%

Software Engineer

Hadoolytics Technologies | Gurugram

Apr 2015 – Aug 2016
  • Architected and developed a real estate website from scratch using Java, Spring, AWS, and Cassandra
  • Integrated Swagger for automated API documentation, saving 20% in development time

Education

Master of Technology in Computer Science and Engineering

NIT Jalandhar | India

CGPA: 7.5/10

Certifications

  • AWS Certified Solutions Architect - Professional
  • Spring Professional Certification