Job description
 
                         About BabyBillion
BabyBillion is one of the fastest-growing kids' content companies in the world.
With over 1 billion monthly views, we are on a mission to become the world’s #1 kids' content channel by December 2025.
We create world-class educational and entertaining videos that captivate preschool audiences globally.
We are looking for a highly creative and data-driven Scriptwriter to join our passionate team and help us scale our storytelling to new heights.
Job Summary
We are seeking an experienced Senior Python Backend Developer to join our team.
In this role, you will be instrumental in designing, building, and scaling our high-performance backend systems.
The ideal candidate has a strong background in creating robust APIs, integrating key services, and architecting solutions for high-traffic applications.
You will take a leading role in enhancing our platform, migrating to a microservices architecture, and mentoring junior developers.
Key Responsibilities
Design, develop, and maintain production-grade applications using  FastAPI  to support over 200 endpoints.
Build and secure RESTful APIs with robust versioning, documentation, and authentication mechanisms like  JWT  and  OAuth .
Manage and optimize  MongoDB  databases, including writing complex aggregation pipelines.
Implement and manage asynchronous background tasks using  Celery  with  Redis  or  RabbitMQ .
Integrate and maintain payment gateways such as  Razorpay  and  Stripe .
Lead architectural improvements, including the migration from a monolithic to a  microservices  architecture.
Develop real-time features using  WebSockets  and design systems to handle 10,000+ concurrent users.
Implement automated testing, performance monitoring (e.g., OpenTelemetry), and system optimizations.
Mentor junior developers and contribute to architectural planning and best practices.
Required Skills & Experience
2+ years of professional experience in backend development.
Strong proficiency in  Python , with expertise in asynchronous programming (async/await).
Proven experience building and scaling applications with  FastAPI .
In-depth knowledge of  MongoDB , including query optimization.
Solid understanding of authentication, security principles, and implementing JWT/OAuth.
Hands-on experience with background task processing using  Celery .
Excellent problem-solving skills and a passion for writing clean, maintainable code.
Preferred Qualifications
Experience with  microservices , event-driven architecture, and API gateways.
Familiarity with containerization ( Docker ) and CI/CD pipelines.
Knowledge of cloud platforms like  AWS  or  GCP .
Exposure to AI/ML tools (e.g., ONNX Runtime),  Kafka , or  GraphQL .
Our Tech Stack
Language/Framework:  Python 3.12+, FastAPI
Database:  MongoDB (Motor)
Task Queues/Brokers:  Celery, Redis, RabbitMQ
Payments:  Razorpay, Stripe
AI/ML:  ONNX Runtime, Rembg
Infrastructure:  Docker, Gunicorn, Uvicorn
Monitoring:  OpenTelemetry, Prometheus
Testing:  Pytest
 
                    
                    
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