Real-Time NLP Sentiment Pipeline

I'm seeking an experienced NLP developer to build a real-time pipeline that ingests text streams via API in JSON format. The primary purpose is sentiment monitoring.

Key requirements:
- Classify sentiment and categorize events
- Output calibrated confidence levels
- Deduplicate and validate data using rules
- Log all activities for production

Ideal skills and experience:
- Proficient in NLP and machine learning
- Experience with real-time data processing
- Strong knowledge of API integration
- Familiarity with data validation and logging techniques

Please provide relevant portfolio and experience.