Case Study
PulsePhase
PulsePhase is a full-stack platform that connects students with educational institutes, enabling institute discovery, profiles, enquiries, payments, and role-based management through a modern, scalable web architecture.
Role
Software Engineer
Type
website
Overview
PulsePhase is a production-oriented full-stack education platform built to bridge the gap between students and educational institutes. The platform provides institute discovery, detailed institute profiles, student interactions, enquiries, authentication, payments, wallet functionality, and administrative management.
The application is built with Next.js, NestJS, PostgreSQL, Prisma, Redis, BullMQ, and Razorpay, with supporting integrations for Cloudinary and Resend. The architecture follows a modular backend approach with role-based access control and separate frontend/backend responsibilities, making the platform scalable and maintainable.
Problem
Educational institutes and students often rely on fragmented websites, manual enquiries, and disconnected communication channels. Students may struggle to discover relevant institutes and access structured information, while institutes need a centralized way to manage their profiles, enquiries, users, and transactions.
PulsePhase was built to provide a single platform where students can discover institutes and interact with them, while institutes and administrators can manage their information and platform operations through dedicated workflows.
Approach
I designed and developed PulsePhase as a full-stack application with a clear separation between the frontend, backend, database, and supporting services.
I started by defining the core user roles and workflows, followed by the database schema and backend modules. The frontend was then built around these APIs and workflows rather than tightly coupling business logic to the UI.
As the application grew, I introduced Redis for caching and BullMQ for background processing, while integrating external services such as Razorpay, Cloudinary, and Resend where appropriate.
I also focused on validation, authorization, payment verification, error handling, and maintaining clear boundaries between different modules.
Technologies
NestJs
PostgreSQL
Next.js
Redis
TypeScript
BullMQ
Tailwind CSSChallenges
1. Designing a scalable backend
As the number of features increased, putting everything into a few large services/controllers would have made the application difficult to maintain.
I separated functionality into domain-oriented NestJS modules so that features such as users, institutes, partners, payments, notifications, and administration could evolve independently.
What I learned:
Good architecture isn't about making the project complicated. It's about creating boundaries that make future changes safer.
2. Payment integrity and verification
Payment processing became one of the more challenging parts of the project. A payment cannot simply be considered successful because the frontend says it succeeded.
I had to work through payment verification, wallet transactions, validation of amounts, manual/offline verification workflows, and the distinction between client-provided payment information and trusted server-side verification.
What I learned:
Anything related to money should be treated as an untrusted input until independently verified on the server.
3. Database design and evolving requirements
The database changed as new features were introduced. For example, institute profiles and wallet/payment functionality required schema changes and migrations.
I worked with Prisma migrations and PostgreSQL while dealing with schema changes, synchronization issues, and maintaining relationships between different entities.
What I learned:
Database design needs to anticipate relationships and data integrity, but it also needs to evolve safely as product requirements change.
4. Authentication and authorization
Different users have different capabilities within PulsePhase. Protecting routes was therefore more than simply checking whether a user was logged in.
I implemented role-aware access patterns and backend-side authorization so sensitive operations aren't dependent on frontend restrictions alone.
What I learned:
Frontend restrictions improve UX, but authorization must ultimately be enforced by the backend.
5. Caching and background processing
Some operations don't need to block the user's request. Redis and BullMQ were introduced to handle caching and background jobs.
This helped me understand the difference between synchronous request/response operations and asynchronous processing.
What I learned:
Not every operation belongs inside the HTTP request lifecycle. Background processing can improve responsiveness and make the system easier to scale.
What I Learned
PulsePhase taught me how different parts of a real application interact beyond simply writing frontend and backend code.
I gained practical experience in system architecture, REST API design, database modeling, authentication and authorization, payment workflows, caching, background jobs, third-party integrations, deployment, debugging, and security considerations.
More importantly, I learned to think about software as a system rather than as individual features. A feature isn't complete when it works in the happy path—it also needs validation, authorization, error handling, observability, and a reliable way to recover when something goes wrong.
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