We are looking for a Lex Senior Developer/Technical Lead.

Key Responsibilities Build enterprise-grade Amazon Lex bots from requirements gathering through production deployment.

Design high-performing voice and chat conversational experiences.

Integrate Amazon Lex with Amazon Connect and AWS serverless services.

Analyze production conversations to improve intent recognition, bot performance, and customer experience.

Lead a small development team while remaining hands-on with coding, troubleshooting, testing, and optimization. Conversational AI Development Create scalable intent models, custom slot types, prompts, and dialog-management strategies.

Optimize natural language understanding performance through continuous tuning based on production traffic and conversation data.

Develop multilingual conversational experiences, with English and French experience preferred.

Design robust fallback, clarification, interruption, escalation, and error-handling strategies.

Apply conversational design and prompt-engineering principles to improve customer interactions.

Required Skills and Experience 6 to 10 years of software development experience.





Minimum 3 years of hands-on Amazon Lex V2 development experience.

Minimum 3 years of experience integrating Amazon Lex with Amazon Connect.

Strong experience designing and developing AWS serverless architectures.

Experience leading developers while remaining actively involved in technical delivery.

AWS Associate-level or Skilled-level certification is preferred.

Mandatory Amazon Lex Technical Skills Amazon

Lex V2

Intent and slot modelling

Custom slot types

Dialog management

Session attributes

AWS Lambda code hooks

Prompt variations

DTMF integration

Confidence-score tuning

Multilingual bot development Mandatory AWS Development Skills AWS Lambda

Amazon DynamoDB

Amazon API Gateway

Amazon Connect

Amazon Bedrock experience is preferred Preferred Artificial Intelligence Knowledge Intent classification

Entity recognition

Prompt engineering

Conversational design

Natural language processing and natural language understanding concepts

Generative AI fundamentals

Amazon Bedrock

📌 Lex Senior Developer/Technical Lead (Richmond Hill)
🏢 Connex Telecommunications
📍 Richmond Hill