Lex Senior Developer/Technical Lead

Connex Telecommunications Inc.•Richmond Hill, ON

13d

About The Position

We are looking for a Lex Senior Developer/Technical Lead. This role involves building enterprise-grade Amazon Lex bots, designing conversational experiences, integrating with AWS services, and leading a development team. The focus is on creating scalable, high-performing, and multilingual conversational AI solutions.

Requirements

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.
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
AWS Lambda
Amazon DynamoDB
Amazon API Gateway
Amazon Connect

Nice To Haves

AWS Associate-level or Professional-level certification is preferred.
Amazon Bedrock experience is preferred
Intent classification
Entity recognition
Prompt engineering
Conversational design
Natural language processing and natural language understanding concepts
Generative AI fundamentals
Amazon Bedrock

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.
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.