AI Automation Engineer – Voice AI, Middleware Integration

WeAssist.io

. Build and maintain middleware connecting Vapi, Retell, and Assistable within GoHighLevel to field service management systems .

Posted 11/12/2026full-timeRemote • Philippines, Colombia, ArgentinaMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and maintaining middleware integrations, particularly with GoHighLevel, ServiceTitan, and Housecall Pro, while ensuring API security and data privacy. Proficient in developing production-grade voice agents and automations using Vapi, Retell, Assistable, and ElevenLabs.

Highest-signal resume keywords

Middleware DevelopmentVoice Agent DeploymentJavaScript ProgrammingREST API IntegrationGoHighLevel Workflows

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScriptTypeScript.NETC#C++REST APIsOAuthAutomationVoice AgentsMiddleware

Soft Skills

Client SupportIndependent WorkCommunication

Tools & Technologies

GoHighLevelServiceTitanHousecall ProN8nHermesComposioOpenClawVapiRetellAssistable

Industry Keywords

API SecurityData PrivacyCredential VaultsVPNVPS HostingAEOSEOTechnical OnboardingSOPsHome Service Trades

Tech Stack

Tools & technologies

JavaScriptTypeScriptC++.NET

About the role

Key responsibilities & impact

Build and maintain middleware connecting Vapi, Retell, and Assistable within GoHighLevel to field service management systems
Integrate with ServiceTitan and Housecall Pro using REST APIs and OAuth
Write integration logic interfacing with .NET / C# / C++ backend environments
Program and verify end-to-end booking workflows into contractor dispatch schedules
Monitor, diagnose, and resolve duplicate bookings, dropped payloads, and failed scheduling attempts
Code, review, and debug JavaScript and/or TypeScript application logic
Build, configure, and maintain production-grade voice agents using Vapi, Retell, Assistable, and ElevenLabs
Tune latency, test prompt frameworks, design agent harnesses, and curate dynamic knowledge bases
Architect multi-step decision trees and parent-child logic
Run automated tests for conversational accuracy, speech recognition, and intent categorization
Maintain reliable after-hours call answering and emergency dispatch agents
Build GoHighLevel workflows for SMS, email, appointment reminders, and estimate follow-up campaigns
Implement automations with Hermes, OpenClaw, Composio, and n8n
Build AI agents that securely access third-party portals for repetitive contractor administration
Support deployment of company-wide automation packages for beta clients
Conduct technical onboarding, gather requirements, and complete client setup and integration during a typical two-month implementation
Connect client information to GoHighLevel sub-accounts
Verify client systems, credentials, and automations remain active, secure, and current
Provide technical support and troubleshooting
Escalate and resolve platform bugs with SaaS vendor support teams
Build dashboards tracking voice minutes, booking volume, and system activity
Configure internal GoHighLevel automations
Document technical architectures and create SOPs
Recommend technical solutions and collaborate with the founder on system design
Work with the current fulfillment agency during an overlap period before taking full ownership
Enforce data privacy and API security protocols
Manage sensitive credentials using LastPass, NordPass, or One-Time Secret
Work within designated secure environments and VPN platforms
Assist with websites, landing pages, hosting, AEO, AI content workflows, Google Business Profile, and local marketing automations as needed

Requirements

What you’ll need

Hands-on experience building and deploying production voice agents with Vapi, Retell, Assistable, and/or ElevenLabs
Experience with prompt tuning, latency optimization, and knowledge base design
Strong JavaScript and/or TypeScript skills
Ability to write, review, and debug code
Comfort reading .NET / C# / C++ environments is a plus
Experience building middleware and integrations using REST APIs, OAuth, webhooks, and SDKs
Solid experience building workflows, automations, and sub-account setups in GoHighLevel
Experience with n8n, Hermes Agents, Composio, OpenClaw, or similar automation and agentic AI platforms
Understanding of API security, data privacy, credential vaults, VPNs, and VPS hosting
Fluent written and spoken English
Comfortable supporting clients directly
Ability to work independently without constant supervision
Direct experience with ServiceTitan or Housecall Pro, or home service trades, preferred
Familiarity with RAG, MCP, and vector databases is a plus
Experience with website builders, hosting, landing pages, Google Business Profile, and AEO/SEO automation is a plus
Software engineering or full-stack development background is a plus
Openness to split shifts and availability for after-hours technical emergencies
Professional setup, clean background, good camera, good microphone, and strong Wi-Fi
Ability to work 8:00 AM–5:00 PM or 9:00 AM–6:00 PM ET

Benefits

Comp & perks

13th Month Bonus
Permanent work-from-home / remote set-up
Health insurance
Dental insurance
Mental health insurance
Great starting salary
Growth opportunity
Performance-based raises
Prizes and bonuses
Reciprocal flexibility for personal commitments and appointments
Path to technical leadership
Performance-based compensation potential
Professional development and personal growth opportunities