🏆 AWS Certified Solutions Architect 💼 Ex-Amazon · Ex-Agoda

I Help Companies Scale Backend Systems That Handle Millions of Users

Lead Backend Architect · Engineering Director · Technical Consultant

10+

Years Experience

10M+

Users Scaled To

₹30Cr

Revenue Generated

28%

Failure Reduction

Specialized in payment systems, crypto platforms, microservices migration, and distributed systems. Currently Director at PhysicsWallah, previously built scalable solutions at Amazon, Agoda, and CoinSwitch Kuber.

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How I Can Help Your Team

Choose the engagement model that fits your needs

🏗️

Backend Architecture Consulting

Review and optimize your system architecture for scale, performance, and reliability. Get actionable recommendations from someone who's built systems handling millions of requests.

System design review & audit
Performance bottleneck analysis
Architecture roadmap planning
Technology stack recommendations

Starting at ₹15,000/hour or project-based

🔄

Microservices Migration

Transform your monolithic application into scalable microservices. I've done this for Amazon, CoinSwitch, and Wayfair with measurable improvements.

Migration strategy & planning
Service boundary definition
Phased implementation approach
Team training & handoff

Project-based (4-12 weeks)

👨‍💼

Fractional CTO / VP Engineering

Get senior technical leadership without full-time commitment. Perfect for startups and scale-ups needing strategic direction.

Technical strategy & roadmap
Team building & hiring
Architecture governance
Vendor & technology evaluation

Part-time retainer (10-20 hrs/week)

📚

Technical Mentorship & Training

Level up your engineering team with hands-on mentorship, code reviews, and training sessions on backend best practices.

One-on-one mentorship sessions
Code review & pair programming
System design workshops
Best practices documentation

Team workshops or individual sessions

🔍

Performance Optimization

Reduce latency, improve throughput, and cut infrastructure costs. I've achieved 30-40% performance gains across multiple projects.

Database query optimization
Caching strategy implementation
API performance tuning
Infrastructure right-sizing

Project-based assessment

🎤

Speaking & Workshops

Book me for your conference, meetup, or corporate training. Topics include Spring Boot, microservices, AWS, and system design.

Conference keynotes & talks
Corporate training sessions
Webinars & online workshops
Custom curriculum development

Contact for speaking fees

Not sure which service fits your needs?

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More Case Studies

💳

Amazon Payment Security

Challenge: Protect payment systems from CSRF attacks and coupon misuse across global markets.

Solution: Architected throttling system with DynamoDB and Java, enhanced payment security protocols.

Result: 19.7% reduction in security impact, 15.3% decrease in coupon code misuse within first month.

📊

Agoda A/B Testing Platform

Challenge: Build in-house A/B testing solution processing millions of messages for product insights.

Solution: Engineered scalable solution using Scala, Cassandra, and Kafka with shared tracking libraries.

Result: 22% faster insights for product managers, 10% increase in tracked users.

🎓

Coding Bootcamp Launch

Challenge: Launch new revenue vertical and rearchitect online test portal at Nolan EduTech.

Solution: Built bootcamp platform using Java, Spring, JPA, AWS, microservices.

Result: Generated ₹30 crore ($3.6M USD) revenue in first year.

🛒

Wayfair Promotions Migration

Challenge: Migrate seller promotions microservice with zero downtime for major e-commerce platform.

Solution: Led 10 engineers using Java, Spring Security, Hibernate, PostgreSQL, Docker, Kubernetes.

Result: 28% reduction in system failures, 25% increase in transaction volume handling.

🏠

Facebook Marketplace Integration

Challenge: Connect Porch.com backend with Facebook Marketplace to reach 200M users.

Solution: Built integration service from scratch, optimized data flows.

Result: Doubled service quote requests, 13% revenue increase.

🎯

PhysicsWallah LMS

Challenge: Build in-house Learning Management System from scratch for India's leading edtech.

Solution: Leading 15 engineers with Java, Spring, Hibernate, TypeScript, Microservices, AWS.

Result: CI/CD pipelines improved deployment frequency by 15%. (Ongoing)

What Colleagues & Clients Say

"Arjun's expertise in backend architecture transformed our payment system at Amazon. His DynamoDB throttling solution reduced coupon misuse by 15.3% in the first month. He thinks at scale and delivers production-ready solutions."

Rajesh Sharma Engineering Manager, Amazon Digital Payments

"Working with Arjun on our microservices migration at CoinSwitch was a game-changer. He not only architected the technical solution but also mentored our team through the transition. System stability during 16x user growth speaks for itself."

Priya Kumar CTO, CoinSwitch Kuber

"Arjun built our A/B testing platform at Agoda that processed millions of events. His Scala + Kafka solution gave product managers 22% faster insights. He's the rare engineer who combines deep technical skills with business understanding."

Amit Mehta Senior Product Manager, Agoda

Current Availability

✅ Open To

Consulting Projects: Backend architecture, system design audits, microservices migration (2-12 weeks)
Speaking Engagements: Conferences, corporate training, webinars on Spring Boot, AWS, system design
Fractional Roles: VP Engineering, Technical Advisor (10-20 hrs/week)
Full-Time Roles: Director/VP Engineering positions (remote or Bangalore/Indore)
Technical Mentorship: Team training, code reviews, architectural guidance

❌ Not Looking For

Individual contributor roles below Staff level
Non-remote positions outside India
Short-term contracts under 4 weeks
Frontend-only projects
Equity-only compensation arrangements

Response Time: I respond to all inquiries within 24 hours

Let's Talk About Your Project