Conversational AI Engineer – Game Prototype

Endless Studios

. Design and build the end-to-end voice conversation pipeline between players and NPCs .

Posted 9/29/2026contractRemote • United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and building voice conversation systems, integrating speech technologies, and optimizing performance within Unity/C#. Proven ability to evaluate and justify technology choices based on measurable outcomes and collaborate effectively with game design and engineering teams.

Highest-signal resume keywords

Unity DevelopmentC# ProgrammingVoice Conversation SystemsSpeech-To-Text IntegrationConversational AI Prototyping

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Software EngineeringEnd-To-End Voice Conversation LoopLarge Language Model IntegrationText-To-Speech TechnologiesSpeech-To-Speech TechnologiesConversational MemoryOn-Device Speech ModelsPerformance MeasurementLatency OptimizationGame AI Systems

Tools & Technologies

UnityCloud ArchitectureNPC Behavior SystemsInteractive Entertainment Tools

Industry Keywords

Game DevelopmentConversational AIInteractive SystemsPlayer Interaction Design

Tech Stack

Tools & technologies

CloudUnity

About the role

Key responsibilities & impact

Design and build the end-to-end voice conversation pipeline between players and NPCs
Evaluate and integrate speech-to-text, large language model, text-to-speech, and speech-to-speech technologies
Evaluate approaches to conversational memory, context, personality, and NPC behavior
Prototype real-time conversational interactions and optimize latency, quality, reliability, and cost
Determine which components should run on-device versus in the cloud
Build and integrate the resulting systems into Unity/C#
Establish an architecture that can evolve from a prototype into a production system
Work closely with game design and engineering teams to define technical needs and create natural, responsive player interactions
Choose the technology stack and justify choices with measured performance, cost, and failure-rate data
Design and build a working prototype of the conversational AI system in Unity

Requirements

What you’ll need

5+ years of professional software engineering experience
At least one shipped project built in Unity with C# (a released game, app or production tool); applicants must provide a link
A working end-to-end voice conversation loop built personally: speech in, language model, speech out; applicants must provide a link or demo
Ability to choose and justify technologies using measured response time, cost per conversation minute, and failure rate
Nice to have: game AI, NPC systems or interactive entertainment experience
Nice to have: conversational memory and agent architectures
Nice to have: on-device speech or language models
Nice to have: multilingual or language-focused AI systems
Applications must include a resume and cover letter, a link to a personally built voice or conversational system, and short answers about latency, on-device/cloud architecture, and NPC memory
Shortlisted candidates must walk through their demo on a 30-minute call

Benefits

Comp & perks

Potential opportunity to continue working with the team beyond the initial prototype stage