WANTED – BACKEND DEVELOPER Madurai – Office Work Only

Position: Backend Developer

Experience: 3+ Years

Location: Madurai

Work Mode: Work from Office only

Working Hours: 10:30 AM – 8:30 PM

Salary: ₹ 25000/ - ₹30,000/month (based on skills & experience)

About the Role

We are looking for a strong and experienced Backend Developer to develop, maintain and secure the backend infrastructure of our mobile application.

The candidate will be responsible for building secure, scalable and reliable APIs, database systems, payment integrations and backend services supporting digital transactions and other application features.

Mandatory Technical Skills1. Programming & Backend.

Advanced / Production-Level Coding Skills – Mandatory

1. Node.js – Strong hands-on experience
2. TypeScript / JavaScript
3. PHP 8.x – Strong knowledge
4. Laravel – Strong hands-on experience
5. Express.js / NestJS – preferred
6. Strong Object-Oriented Programming (OOP)
7. Clean, reusable and maintainable coding practices
8. Strong understanding of backend architecture

2. Database

1. MySQL / PostgreSQL
2. Advanced SQL queries
3. Joins, indexes and relationships
4. Database design and normalization
5. Query optimization
6. Transactions and concurrency handling
7. Data integrity and backup/recovery concepts

3. API Development

1. REST API development
2. JSON request/response handling
3. API authentication and authorization
4. API versioning
5. Third-party API integration
6. Payment Gateway API integration
7. Webhook implementation and verification
8. API error handling and logging

4. Security – MUST HAVE

The candidate must have practical knowledge of:

1. JWT / OAuth 2.0
2. Role-Based Access Control (RBAC)
3. Secure authentication & authorization
4. API rate limiting




5. Input validation and sanitization
6. SQL Injection prevention
7. XSS / CSRF protection
8. Secure password hashing
9. HTTPS / TLS
10. Encryption of sensitive information
11. Secure API key & secret management
12. OWASP API Security practices
13. Secure webhook verification
14. Audit logs

5. Payment & Financial Transaction Handling

Experience with payment-related systems is highly preferred.

The developer should understand:

1. Payment Gateway integration
2. Payment status verification
3. Payment callbacks/webhooks
4. Idempotency & duplicate transaction prevention
5. Transaction reconciliation
6. Refund handling
7. Failed/pending payment handling
8. Database transactions
9. Atomic balance updates
10. Transaction/audit logging

6. Backend Responsibilities

The developer will work on backend systems related to:

1. Digital Transactions
2. Customer accounts
3. KYC-related integrations
4. Payment processing
5. Subscription/payment systems
6. balance management
7. Transaction history
8. Admin APIs
9. Notifications
10. Third-party service integrations

7. Cloud & Server

Knowledge of the following is preferred:

1. Linux Server
2. AWS / Azure / Google Cloud
3. Nginx
4. SSL/TLS configuration
5. Docker
6. CI/CD
7. Server monitoring
8. Application logs
9. Database backups
10. Disaster recovery basics

8. Redis & Performance

Knowledge of:

1. Redis
2. Caching




3. Session management
4. Rate limiting
5. Queue/background jobs
6. Performance optimization

is preferred.

9. Development Tools

1. Git / GitHub
2. Postman
3. API testing
4. Debugging tools
5. Version control
6. Code review
7. Basic CI/CD knowledge

Key Responsibilities

1. Develop and maintain secure backend APIs
2. Build new backend modules for our application
3. Integrate payment gateways and third-party APIs
4. Develop and maintain database structures
5. Ensure accurate gold/silver balance calculations
6. Prevent duplicate financial transactions
7. Implement secure authentication and authorization
8. Monitor and troubleshoot production issues
9. Optimize API and database performance
10. Maintain proper transaction logs and audit trails
11. Work closely with the Flutter/mobile development team
12. Maintain clean, scalable and well-documented code
13. Participate in testing, deployment and production support

Candidate Profile

We are looking for someone who is:

✔ Robust in practical coding

✔ Strong in backend architecture

✔ Experienced with production applications

✔ Good at debugging and problem solving

✔ Security-conscious

✔ Comfortable working with APIs and databases

✔ Able to independently handle backend development

✔ Able to work with a mobile application development team

✔ Willing to work from our Madurai office

❌ Not suitable for this role

Candidates with only basic knowledge of PHP/Laravel or Node.js and no real-world backend development experience are not preferred.

Pay: From ₹20,000.00 per month

Benefits:

1. Health insurance
2. Life insurance
3. Provident Fund

Work Location: In person

📌 WANTED BACKEND DEVELOPER Madurai Office Work Only
🏢 SURYA NAYAGI GOLD PRIVATE
📍 Madurai