Lex Senior Developer/Technical Lead

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 Professional-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