Biththal

Work

Production backend systems built at Brainztechs IT Solutions, mostly Go, Gin, and PostgreSQL, across EdTech, FinTech, and multi-tenant products.

Brainztechs

TutoredX

EdTech backend for one-on-one and live group sessions.

Backend services for one-on-one instructor booking and live group sessions, with authentication flows, authorization middleware, and role-based access control for students, instructors, and admins. Core booking workflows cover private sessions and group session management. AWS S3 handles secure file storage, with automated PDF invoice generation for instructor payouts and transaction records. Critical business logic and API endpoints are covered by unit and integration tests.

  • Go
  • Gin
  • PostgreSQL
  • AWS S3
  • RBAC
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Brainztechs

Venue Management Backend

Multi-tenant venue and hall booking API with geospatial search.

A multi-tenant REST API in Go with JWT authentication and role-based access control across platform, tenant, and customer roles, enforcing tenant-scoped data isolation. Booking workflows use 15-minute holds, with availability computed from confirmed bookings, active holds, and manual overrides. PostGIS powers radius filtering and distance-aware sorting, paired with base64 keyset cursor pagination for public venue listings. Files move directly to and from S3 through presigned URLs, and payment-to-invoice creation is transaction-safe.

  • Go
  • Gin
  • PostgreSQL
  • PostGIS
  • AWS S3
  • JWT

Brainztechs

Samridhi Bazar

Loan lifecycle APIs for a FinTech loan virtualization system.

Secure APIs for loan lifecycle management, customer onboarding, and financial data handling. KYC verification, loan application, and approval workflows apply secure data-handling practices and the business rules sensitive financial operations require, within a service-oriented architecture built for long-term scalability and maintainability.

  • Go
  • Gin
  • PostgreSQL
  • FinTech
  • KYC

Brainztechs

Inventory Management System

Multi-tenant inventory APIs with per-tenant data isolation.

A tenant-scoped architecture that isolates each business's data and enforces access control per tenant. REST APIs cover inventory tracking, stock movements, transfers, sales, and reporting, backed by relational schemas I designed. PDF invoices are generated with chromedp and uploaded to S3.

  • Go
  • Gin
  • PostgreSQL
  • AWS S3
  • Multi-tenant

In progress

AWS File Upload System

Hands-on AWS practice while studying for the Developer Associate exam.

A personal project built as hands-on practice for AWS Certified Developer coursework, working directly with S3, IAM, and related core AWS services.

  • AWS
  • S3
  • IAM