• At least 3 - 5 years of relevant work experience
• Degree in Computer Science
• Web Frameworks - Express must, Fastify alternatives, with implementation knowledge of REST APIs, WebSockets, Socket.IO, Multi-threading, Queue Pools, Background tasks, Parallel Processing, etc.
• Advanced API Composition - Writing Endpoints with OpenAPI/Swagger standards, Middlewares, CORS, Authentication aware (OAuth2, JWT, Bearer/Basic authentication) API's, Proper HTTP Codes handling, Input handling of Forms, Path Operations, Queries, Streams, Rate Limiting/API throttling, Requests for Webhooks with Linear/Exponential Backoff policies.
• Database Technologies – MongoDB & Redis must, PostgreSQL/ DynamoDB are optional.
• Ability to write pure Custom Scripts, Engines & Integrations - Text, Image, Data Processing/Custom packages/API Integrations.
• Familiarity with ORM Libraries - Mongoose or similar.
• Strong Knowledge of Containers - Dockerfile, Docker-Compose, DockerHub Pull/Push, Ports/Environments/Volumes/Networks, considering Microservices deployments.
• Caching - In-memory caching with Redis/RedisJSON or KeyDB/Memcached, thread-safe, LRU/MRU with TTLs.
• Message Queuing and Task Queuing - With RabbitMQ/MQTT/AWS SNS/SQS using BeeQueue or Bull.
• Cloud Platforms: AWS EC2, AWS Lambda, AWS Elasticache, AWS DocumentDB, DigitalOcean/Vultr, GCP/Google Cloud APIs, Elastic Beanstalk
• Code Version Control - Using Git, Github, and Github Actions.
• Sound Knowledge of Web - HTML, CSS & JavaScript.

Some highly preferred skills:

• Adhering to The 12 Factor App - Codebase, Environment Config, Isolating dependencies, Port binding, Concurrency, Dev/Prod parity, Logging.
• Using Google Colab to test ML models for API writing.
• Firebase Node Admin - FCM, Fire Store.
• Docker Swarm.