Full-Stack Developer — AI Voice Agents

Worldwide | Sept. 16, 2026

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Company: PhoneNinjas AI

Country: Worldwide

Salary: $33,600 - $38,400

Type: Remote

Employment: Full-time

Description: PhoneNinjas AI (phoneninjas.ai) is a Texas based company building AI voice receptionists for dental practices, law firms, and home service businesses in the US. None

3+ years building full-stack web applications
Solid SQL and PostgreSQL; hands-on experience with Supabase (auth, RLS, edge functions) or an equivalent BaaS
Strong with REST APIs, JSON, HTTP, and webhooks — you read API docs and integrate without hand-holding
JavaScript/TypeScript proficiency (Node.js); Python is a plus
Comfortable with formal/boolean logic and state management — the same thinking that makes an AI agent behave correctly
Advanced English (C1+), spoken and written — you will read subtle US customer requirements and review recorded calls daily
Meticulous, autonomous, and communicative in a remote team
Located in Colombia and available during US Central business hours

PhoneNinjas AI (phoneninjas.ai) is a Dallas-based company building AI voice receptionists for dental practices, law firms, and home service businesses in the US. Our agents answer inbound calls around the clock, schedule appointments, capture leads, and escalate to staff when needed. Small team, direct founder access, production customers from day one.

Job functions

Build and maintain the platform behind our AI voice agents: Supabase/PostgreSQL backend, REST APIs, and webhooks
Design and ship automations in Pipedream that connect agents to customer scheduling tools, CRMs, and email/SMS
Configure and tune AI voice agents for new customers: prompts, conversation logic, escalation rules, edge cases
Convert customer intake notes and real call recordings into correct agent behavior
Analyze call transcripts and system logs, find failures, and fix them at the root
Contribute to low-code/BPM work on the Appian platform for enterprise consulting projects
Maintain reusable configuration templates and technical documentation by industry
Join English-language onboarding and technical calls with US customers

Benefits

3,000 USD salary paid monthly, with a compensation review at 6 months
Full-time Colombian employment contract through an Employer of Record — statutory benefits included, not a contractor arrangement
100% remote, long-term position
Direct work with the founder; your code and configurations ship to paying customers within days
Hands-on experience across production voice AI, Supabase, workflow automation, and enterprise low-code

Desirable skills