Software Engineer IV

PTR Global; Chicago (IL); On-site; USD 96,000 - 110,000; Full time

Job summary

PTR Global is seeking a Python Developer for a senior, hands-on development contract in Chicago/Houston. The role emphasizes voice-enabled AI agents, LangChain/LangGraph frameworks, and scalable AWS-based backend services.

You will own design, coding, testing, deployment, and production support across the full stack of voice automation initiatives. The ideal candidate will collaborate with product, AI/ML, and platform teams, delivering robust, scalable solutions with secure APIs, clean code, and

Qualifications

• Python development: Production-quality backend services, asynchronous programming, object-oriented design, and automated testing.
• Conversational and voice AI: LLM-powered voice agents, speech-to-text and text-to-speech integration, real-time conversation flows, and voice experience optimization.
• AI agent development and orchestration: LangChain, LangGraph, or comparable frameworks; tool calling, prompt engineering, conversation state management, and RAG.
• AWS cloud development: Scalable deployment, serverless and container-based services, monitoring, and production troubleshooting.
• API integration and software design: REST APIs, microservices, event-driven patterns, and relational, NoSQL, and vector databases.

Responsibilities

• Design, develop, and deploy voice AI agents and agentic workflows using Python and LangChain, LangGraph, or comparable frameworks.
• Build conversational workflows that manage customer intent, multi-turn context, tool execution, business rules, fallback behavior, and handoff to a live representative.
• Integrate speech recognition, speech synthesis, streaming interfaces, and contact center platforms; optimize response latency, turn-taking, interruption handling, and recovery from recognition errors.
• Develop secure APIs and backend integrations that enable AI agents to retrieve information and execute approved customer service and retail transactions.
• Implement and optimize prompts, agent orchestration, retrieval-augmented generation (RAG), and grounding against approved enterprise knowledge sources.
• Build resilient, scalable AWS solutions with appropriate timeout, retry, error-handling, and asynchronous processing patterns.
• Write clean, maintainable code; participate in design and code reviews; and contribute to technical specifications and architectural decisions.
• Develop unit, integration, and conversational regression tests; support end-to-end, performance, and non-functional testing.
• Evaluate conversation quality, task completion, response accuracy, latency, and failure scenarios; use findings to improve reliability and customer experience.
• Implement security, customer data protection, responsible AI guardrails, and controls against unsupported responses or unauthorized actions.
• Estimate work for sprint and release planning, communicate dependencies and risks, and deliver assigned capabilities on time and to agreed quality standards.
• Prepare and release software through non-production and production environments using CI/CD pipelines; support deployment validation and post-release monitoring.
• Troubleshoot production issues, identify root causes, implement fixes, and document operational procedures and support handoffs.
• Collaborate with employees, vendor contractors, product teams, and business stakeholders in an Agile delivery environment.

Tools

LangChain

LangGraph

AWS

CI/CD

REST APIs

Job description

Position: Python Developer

Location: Chicago, IL and Houston, TX

Job Description:

• Python development: Production-quality backend services, asynchronous programming, object-oriented design, and automated testing.
• Conversational and voice AI: LLM-powered voice agents, speech-to-text and text-to-speech integration, real-time conversation flows, and voice experience optimization.
• AI agent development and orchestration: LangChain, LangGraph, or comparable frameworks; tool calling, prompt engineering, conversation state management, and RAG.
• AWS cloud development: Scalable deployment, serverless and container-based services, monitoring, and production troubleshooting.
• API integration and software design: REST APIs, microservices, event-driven patterns, and relational, NoSQL, and vector databases.

Project Overview:

• Candidates will support client's AI automation initiatives by building voice-enabled AI agents that help customers complete retail and service journeys quickly and reliably.
• The primary focus is voice automation, with reusable capabilities that can support future channels. Solutions must integrate with enterprise services and scale during peak demand and irregular operations (IRROPS).
• This is a hands-on senior development contract role responsible for designing, coding, testing, deploying, and supporting production solutions—not solely developing prototypes or prompts.
• Candidates will work with product, architecture, AI/ML, and platform teams, contribute to technical decisions, and own delivery of assigned capabilities from requirements through production support.

Primary Responsibilities:

• Design, develop, and deploy voice AI agents and agentic workflows using Python and LangChain, LangGraph, or comparable frameworks.
• Build conversational workflows that manage customer intent, multi-turn context, tool execution, business rules, fallback behavior, and handoff to a live representative.
• Integrate speech recognition, speech synthesis, streaming interfaces, and contact center platforms; optimize response latency, turn-taking, interruption handling, and recovery from recognition errors.
• Develop secure APIs and backend integrations that enable AI agents to retrieve information and execute approved customer service and retail transactions.
• Implement and optimize prompts, agent orchestration, retrieval-augmented generation (RAG), and grounding against approved enterprise knowledge sources.
• Build resilient, scalable AWS solutions with appropriate timeout, retry, error-handling, and asynchronous processing patterns.
• Write clean, maintainable code; participate in design and code reviews; and contribute to technical specifications and architectural decisions.
• Develop unit, integration, and conversational regression tests; support end-to-end, performance, and non-functional testing.
• Evaluate conversation quality, task completion, response accuracy, latency, and failure scenarios; use findings to improve reliability and customer experience.
• Implement security, customer data protection, responsible AI guardrails, and controls against unsupported responses or unauthorized actions.
• Estimate work for sprint and release planning, communicate dependencies and risks, and deliver assigned capabilities on time and to agreed quality standards.
• Prepare and release software through non-production and production environments using CI/CD pipelines; support deployment validation and post-release monitoring.
• Troubleshoot production issues, identify root causes, implement fixes, and document operational procedures and support handoffs.
• Collaborate with employees, vendor contractors, product teams, and business stakeholders in an Agile delivery environment.

Pay Range: $70 - $80

The specific compensation for this position will be determined by a number of factors, including the scope, complexity and location of the role as well as the cost of labor in the market; the skills, education, training, credentials and experience of the candidate; and other conditions of employment. Our full-time consultants have access to benefits including medical, dental, vision and 401K contributions as well as any other PTO, sick leave, and other benefits mandated by appliable state or localities where you reside or work.