Job Overview
We are looking for a skilled Full Stack Developer with 2–3 years of hands-on experience in the MERN stack to join our development team. The ideal candidate should have strong experience building scalable web applications, REST APIs, database-driven systems, and cloud-based applications using MongoDB, PostgreSQL, and AWS.
Experience working with AI-powered features and payment gateway/payment processing systems will be highly preferred.
The candidate will work closely with product, backend, frontend, DevOps, and QA teams to design, develop, integrate, test, and maintain reliable production-grade applications.
Key ResponsibilitiesFull Stack Development
- Develop responsive and scalable web applications using React.js, Node.js, Express.js, and JavaScript/TypeScript.
- Build reusable and maintainable frontend components.
- Develop secure and scalable RESTful APIs and backend services.
- Implement authentication, authorization, RBAC, session management, and API security.
- Integrate frontend applications with backend APIs and third-party services.
- Troubleshoot and optimize application performance.
Database Development
- Work with MongoDB and PostgreSQL for application development.
- Design database schemas, relationships, indexes, and queries.
- Write optimized SQL queries and MongoDB queries.
- Handle transactions, data consistency, migrations, and database optimization.
- Troubleshoot database performance and connectivity issues.
AWS & Cloud
- Deploy and maintain applications on AWS.
- Hands-on experience with services such as:
- EC2
- ECS
- ECR
- S3
- RDS
- CloudWatch
- IAM
- VPC
- ALB
- Route 53
- Understand basic cloud networking, security groups, IAM permissions, and environment configuration.
- Work with development, staging, and production environments.
- Support CI/CD pipelines and automated deployments.
Payment Systems
- Develop and integrate payment gateways and payment APIs.
- Understand payment flows such as:
- Payment initiation
- Authorization
- Capture
- Success/failure handling
- Refunds
- Webhooks
- Transaction reconciliation
- Work with payment gateway APIs, SDKs, webhooks, and third-party payment providers.
- Implement secure handling of payment-related data.
- Troubleshoot payment API and transaction integration issues.
- Understanding of payment orchestration, routing, or payment processing systems is an advantage.
AI Integration
- Integrate AI/LLM-powered features into web applications.
- Work with AI APIs and third-party AI services.
- Build features such as AI assistants, intelligent search, automation, recommendations, or AI-based analytics.
- Understand basic concepts such as:
- LLMs
- Prompt engineering
- Embeddings
- RAG
- Vector databases
- AI API integration
- Experience with OpenAI, Claude, Gemini, Qwen, Ollama, or similar technologies is a plus.
API & Third-Party Integrations
- Design and consume REST APIs.
- Integrate external services and third-party APIs.
- Implement webhook-based integrations.
- Handle API authentication, retries, errors, rate limits, and logging.
- Document APIs using Swagger/OpenAPI or similar tools.
Security & Performance
- Follow secure coding practices.
- Implement proper input validation and error handling.
- Protect APIs against common vulnerabilities such as SQL injection, NoSQL injection, XSS, CSRF, and unauthorized access.
- Optimize frontend and backend performance.
- Implement logging, monitoring, and proper exception handling.
Collaboration
- Work with developers, DevOps engineers, QA engineers, and product teams.
- Participate in code reviews and technical discussions.
- Analyze requirements and convert them into technical solutions.
- Debug production issues and provide root-cause analysis.
- Maintain clean, documented, and maintainable code.
Required Technical SkillsFrontend
- React.js
- JavaScript / TypeScript
- HTML5
- CSS3
- REST API integration
- State management such as Redux, Context API, or similar
Backend
- Node.js
- Express.js
- TypeScript
- REST API development
- Authentication & Authorization
- JWT
- Webhooks
Databases
- MongoDB
- PostgreSQL
- SQL
- Database schema design
- Query optimization
- Indexing
Cloud / DevOps
- AWS
- EC2
- ECS
- ECR
- S3
- RDS
- IAM
- CloudWatch
- Basic Docker knowledge
- Git and GitHub
- Basic CI/CD knowledge
Payment Technology
- Payment gateway API integration
- Payment webhooks
- Transaction lifecycle
- Refunds
- Reconciliation
- Payment failure handling
- Experience with providers such as Stripe, Razorpay, PayPal, Adyen, Checkout.com, or similar is an advantage.
AI
- AI API integration
- LLM concepts
- Prompt engineering
- RAG fundamentals
- AI chatbot/assistant development
- Experience with OpenAI, Claude, Gemini, Qwen, Ollama, or similar platforms is a plus.
Preferred Skills
- Experience with payment platforms, fintech, banking, or financial applications.
- Understanding of PCI DSS and payment security.
- Experience with payment orchestration or multi-provider payment systems.
- Experience working with microservices.
- Docker and containerization.
- Redis or caching technologies.
- Message queues such as RabbitMQ, Kafka, or SQS.
- Basic understanding of AWS networking and security.
- Experience with automated testing.
- Experience troubleshooting production systems.
Education
- Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field is preferred.
- Equivalent practical development experience will also be considered.
What We Are Looking For
- Strong problem-solving and debugging skills.
- Good understanding of software development lifecycle.
- Ability to write clean, scalable, and maintainable code.
- Good understanding of API architecture and database design.
- Ability to work independently as well as within a team.
- Strong attention to security, performance, and reliability.
- Willingness to learn and work with new technologies.
- Good communication and documentation skills.
Experience Level
2–3 years of professional software development experience, with strong hands-on experience in:
MERN Stack + AWS + MongoDB + PostgreSQL + APIs + Payment Systems + AI Integrations
Interview Focus Areas
Candidates may be evaluated on:
- JavaScript / TypeScript fundamentals
- React.js development
- Node.js and Express.js
- REST API architecture
- MongoDB and PostgreSQL
- AWS fundamentals
- Docker and deployment concepts
- Payment gateway integrations
- Webhooks and transaction lifecycle
- AI/LLM integration
- Application security
- Debugging and production troubleshooting
- System design fundamentals
- Git and development workflow
- Real-world coding/problem-solving ability
Pay: ₹380,818.56 - ₹1,035,215.20 per year
Benefits:
Work Location: Hybrid remote in Mumbai, Maharashtra (Mumbai, Mumbai District)
