Casagrand India Full Stack Developer Interview: Rounds, Questions and Preparation

What the job involves

A Full Stack Developer in proptech and construction tech builds web and mobile applications that manage property listings, construction project tracking, and customer relationship workflows. Day to day, you work on both front-end interfaces for sales teams and back-end services that handle inventory, pricing, and document management. You also integrate with third-party APIs for payments, maps, and CRM systems used by builders like Casagrand India.

Role and technical knowledge

1. 1

   How would you design a database schema for a property listing system that includes projects, units, and customer enquiries?

   Mention tables for projects, units, customers, and enquiries with foreign key relationships. Discuss indexing on location and status fields for fast search.

2. 2

   Explain how you would implement role-based access control for a construction project dashboard where site engineers, sales, and admins see different data.

   Describe roles, permissions, and middleware checks on the back end. Mention JWT or session-based auth and front-end route guards.

3. 3

   What are the key differences between SQL and NoSQL databases, and which would you choose for storing construction material inventory and why?

   Compare schema flexibility, transactions, and scaling. For inventory with frequent updates and relational data, SQL is often preferred; justify your choice.

4. 4

   How would you integrate a third-party payment gateway for booking a property online?

   Cover order creation, secure server-side verification, webhooks for status updates, and handling failures or refunds.

Practical scenarios and problem solving

1. 5

   A sales team complains that the property search page is slow when filtering by location and price range. How would you debug and improve performance?

   Suggest checking database indexes, query execution plans, adding pagination, and caching frequent searches. Mention front-end lazy loading.

2. 6

   You need to build a feature that lets customers upload documents like PAN cards and sale agreements. How would you handle file storage and security?

   Discuss cloud storage (e.g., S3), file type and size validation, virus scanning, and access-controlled URLs. Mention encryption at rest.

3. 7

   During a construction project, the mobile app used by site engineers goes offline. How would you design the app to work with poor connectivity?

   Talk about offline-first design, local storage or IndexedDB, sync queues, and conflict resolution when the connection returns.

4. 8

   How would you approach migrating an existing legacy property management system to a modern full stack application without disrupting ongoing sales?

   Propose a phased migration, parallel running, data validation scripts, and rollback plans. Emphasise stakeholder communication.

Coding and system design

1. 9

   Write a function to find all units in a project that are available for sale and within a given price range. What data structure would you use?

   Use an array of objects and filter with conditions. Discuss time complexity and when to use a binary search tree or sorted array for range queries.

2. 10

   Design a REST API for a customer to schedule a site visit to a property. List the endpoints and request/response formats.

   Include endpoints like POST /visits, GET /visits/:id, and PUT /visits/:id/cancel. Mention validation, authentication, and status codes.

3. 11

   How would you implement real-time notifications for a sales team when a new high-value enquiry comes in?

   Suggest WebSockets or server-sent events, a message queue, and a notification service. Mention scaling and fallback to email or SMS.

Behavioural and HR questions

1. 12

   Why do you want to work in proptech or construction tech, and what interests you about companies like Casagrand India?

   Show awareness of how technology improves property buying, project tracking, or customer experience. Connect your skills to real-world impact.

2. 13

   Tell me about a time you had to learn a new technology quickly for a project or hackathon. How did you manage?

   Use a specific example with steps you took, resources used, and the outcome. Highlight self-learning and time management.

3. 14

   Describe a situation where you disagreed with a teammate on a technical approach. How did you resolve it?

   Focus on listening, data-driven discussion, and reaching consensus. Avoid blaming others; show teamwork and respect.

4. 15

   Where do you see yourself in three years as a full stack developer in this sector?

   Align your growth with deepening domain knowledge, taking ownership of modules, and contributing to scalable systems. Show ambition but stay realistic.