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Mid-Level Voice AI Developer

Tekfortune Inc.Dallas, Texas🇺🇸United States

Quick overview

SeniorityMid Senior
Employment typeFull Time
Work modeRemote
LocationDallas, Texas, United States
AWSLLMPythonREST

Job description

Job Description Job Description Tekfortune is a fast-growing consulting firm specialized in permanent, contract & project-based staffing services for world s leading organizations in a broad range of industries. In this quickly changing economic landscape, virtual recruiting and remote work are critical for the future of work. To support the active project demands and skills gaps, our staffing experts can help you find the best job for you.
Position: Mid-Level Voice AI Developer
Location: Dallas, TX _ Onsite Only
Interview: 2 Round of face to face interview
Role Overview
We are seeking an on-site Mid-Level Voice AI Developer with 5 to 8 years of experience to join our team in North Dallas. In this role, you will own the technical execution of our voice automation stack, focusing on building high-performing inbound/outbound sales/scheduling and customer service agents. Deep hands-on production experience with Retell AI is a strict requirement. You will design and implement the logic, state machines, and API integrations that allow our voice agents to resolve client issues, handle real-time calendars, and drive outbound growth initiatives.
Key Responsibilities
  • Retell AI Agent Architecture: Build, test, and deploy production-grade inbound and outbound voice agents using the Retell AI platform, SDKs, and custom LLM WebSockets.
  • Sales & Scheduling Integration: Connect voice agents directly to scheduling APIs (e.g., Calendly, custom CRMs and apps) to allow agents to pull availability, book appointments, and process cancellations live on a phone call.
  • Low-Latency Loop Optimization: Fine-tune Retell setups to achieve ultra-low latency, minimizing dead air and handling human interruptions naturally during fluid sales and support conversations.
  • Data & CRM Synchronization: Ensure call outcomes, reservation data, and customer notes are instantly and accurately synced with our internal databases and CRM via webhooks and REST APIs.
  • Prompt & State Engineering: Write, test, and refine structured LLM prompts to enforce business compliance, overcome customer objections in sales flows, and handle edge cases gracefully.
  • Analytics & Quality Monitoring: Analyze Retell call logs and audio records to track key performance indicators (KPIs) like call resolution, booking conversion rates, and latency drops.
Required Qualifications & Skills
  • Experience: 4 to 5 years of software engineering experience, with a heavy track record of creating and implementing interactive, production-level voice agents.
  • Platform Core: Proven, hands-on production experience building with Retell AI. You must be comfortable overriding default configurations and handling custom backend triggers.
  • Technical Stack: Advanced proficiency in Lambda, Python, experience with AWS services, experience with Databases, specializing in asynchronous programming for real-time streaming data.
  • APIs & Telephony: Extensive experience working with RESTful APIs, webhooks, and telephony platforms like Twilio (handling numbers, outbound triggers, and call routing) and Vonage.
  • Location: Must be able to work full-time on-site at our office in North Dallas.
Preferred Qualifications
  • Local to the Dallas-Fort Worth metroplex with an understanding of regional telephony routing.
  • Experience building guardrails to handle sensitive customer service data securely.
  • Previous experience optimizing high-volume outbound dialers tied to AI agents.

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