About the job :

Job Title : Backend Developer (FAST API + AWS)

Location : Pune (Hybrid)

Work Experience : 6-10 years

Job Summary :

We are looking for a highly skilled Backend Engineer with strong experience in FastAPI, AWS infrastructure, authentication systems, payment integrations, monitoring systems, sockets, and scalable backend architecture. The candidate should be comfortable building production-grade APIs, working with real-time systems, and handling cloud-native deployments. This role involves working on scalable AI-driven web and mobile platforms with integrations across payments, subscriptions, authentication, analytics, monitoring, and real-time communication systems.

Required Skills :

Backend Development :

- Strong experience with Python and FastAPI

- Experience designing scalable REST APIs and async backend systems

- Deep understanding of backend architecture, middleware, dependency injection, and background task handling

- Strong experience with WebSockets, socket lifecycle management, reconnection handling, and real-time communication systems

- Experience handling concurrent socket connections and event-driven systems

- Knowledge of microservice-oriented architecture is a plus

AWS & Cloud Infrastructure :

- Strong hands-on experience with :

1. EC2

2. S3

3. DynamoDB

4. Load Balancers

- Experience with production deployments, scaling, monitoring, and security hardening

- Understanding of CI/CD pipelines and deployment automation

Database Experience :

- Strong experience with DynamoDB

- Must understand :

1. GSIs (Global Secondary Indexes)

2. Query optimization

3. Partition key design

4. Scaling considerations

5. Single-table design concepts

- Experience with MongoDB/PostgreSQL is a plus

Authentication & Security :

- Experience with Auth0 or similar authentication providers

- Understanding of :

1. JWT authentication

2. Session handling

3. OAuth flows 4. RBAC / permission systems 5. Secure API design

- Experience implementing secure backend authorization flows

Payments & Subscription Systems :

- Experience integrating Stripe APIs

- Knowledge of :

1. Subscription lifecycle management

2. Webhooks

3. Payment intents

4. Billing flows

5. Invoice handling

- Experience with RevenueCat integration for mobile subscription management is highly preferred

Monitoring & Reliability :

- Experience with monitoring and observability tools such as :

1. CloudWatch

2. Datadog

3. Grafana

4. Prometheus

5. Sentry

- Ability to monitor logs, infrastructure health, API performance, socket reliability, and production incidents

- Experience with alerting systems and production debugging workflows

Additional Preferred Skills :

- Experience supporting Flutter or React-based applications

- Familiarity with mobile backend requirements

- Experience debugging production systems and improving reliability/performance

Responsibilities :

- Develop and maintain scalable backend APIs using FastAPI

- Design secure and efficient backend architecture

- Manage AWS infrastructure and deployment pipelines

- Build real-time communication systems using WebSockets/sockets

- Build payment and subscription systems using Stripe and RevenueCat

- Optimize DynamoDB schemas and GSI usage for performance

- Implement authentication and authorization systems

- Monitor infrastructure, backend services, socket systems, and production environments

- Improve system reliability, performance, and scalability

- Collaborate with frontend, mobile, and DevOps teams

- Participate in debugging, testing, and production monitoring

Ideal Candidate should have :

- Strong problem-solving ability

- Comfortable working in fast-paced startup environments

- Able to independently design and implement backend systems

- Good understanding of scalability and production engineering

- Strong ownership mindset and debugging skills