Personal Tool · Active · Solo ProjectActive Project
IdeaHub
Centralized platform for capturing product ideas and thoughts, with soft delete and Auth Service integration.
Next.jsDrizzle ORMPostgreSQL
3 min readRead case study →
Backend Engineer
Hi, I'm Lakshay
Building APIs, authentication systems, and payment workflows with Node.js & AWS
Introduction
Hi, I'm Lakshay — a Backend Engineer focused on building reliable systems.
I specialize in authentication architecture, payment integration, and event-driven services using Node.js, Express, MongoDB, and AWS.
What I Work On
- Payment security and transaction processing
- Authentication system reliability
- Asynchronous workflow design
- Database architecture and optimization
My approach: understand the root cause, design clear architecture, implement with proper observability.
Top Projects
Engineering case studies — technical decisions, tradeoffs, and debugging stories.
Personal Tool · Active · Solo ProjectActive Project
Auth Service
Centralized authentication service with asymmetric JWT, local token verification, and async email delivery via AWS.
ExpressMongoDBAWS SNS
3 min readRead case study →
Internship Project · Production · Team ProjectProduction System
Leadership Talk Season 3
Event registration platform for a 2-day leadership event with 4 speaker sessions and 500+ combined registrations.
ExpressMongoDBCashfree
3 min readRead case study →
Technical Assessment · Completed · Solo ProjectTechnical Assessment
FinTech Core API
Transaction APIs with mutex locking, idempotency protection, and auditability — built as a backend engineering assessment.
Node.jsExpressPostgreSQL
2 min readRead case study →
Experience
Where I've applied backend engineering in production.
Backend Engineer · Present
InternWare
Backend systems powering event registration platforms, authentication, payment workflows, and administrative tooling for real users.
At InternWare, I worked on authentication, payment workflows, coupon management, and admin tooling for production event-registration systems handling real users and transactions.
Read full experience →Skills & Technologies
Backend Development
Node.jsExpress.jsMongoDBREST APIsJWTOAuth 2.0WebhooksCashfree
Cloud & AWS
LambdaSQSSNSCloudWatchIAM
DevOps & Deployment
DockerGitHub ActionsLinux
Development Tools
GitPostmanESLint
Latest Articles
Technical insights on web security, authentication, and modern software engineering
UPIPayments
How UPI Works: Understanding India's Real-Time Payment System
Learn how UPI (Unified Payments Interface) enables instant payments in India. Understand the complete payment flow, security features, and NPCI's role in digital transactions.
5 min read
OAuthGoogle
How Google OAuth Works: Understanding Login with Google
Discover how Google OAuth authentication works behind the scenes. Learn about authorization codes, access tokens, refresh tokens, and the complete OAuth 2.0 flow.
3 min read
SecuritySSL
How Does SSL Certificate Work? Understanding HTTPS Security
Learn how SSL certificates make HTTPS websites secure through asymmetric and symmetric encryption, digital signatures, and the TLS protocol. Complete guide to web security.
3 min read
Contact
Open to Backend Engineer opportunities in authentication infrastructure, payment systems, or distributed services. Reach out via email or connect on social platforms.
dev@lakshaymahajan.com