Full Stack Engineer – Node.js, TypeScript, PostgreSQL, AWS

OneSeven Tech (OST)

Full Stack Engineer developing REST APIs for voice AI solutions at OneSeven Tech. Integrating with various APIs and managing PostgreSQL database for a stable backend infrastructure.

Posted 5/22/2026contractRemote • 🇦🇷 ArgentinaMid-LevelSenior💰 $4,000 - $5,000 per monthWebsite

Tech Stack

Tools & technologies

AWSCloudGraphQLJavaScriptNode.jsPostgresTypeScript

About the role

Key responsibilities & impact

Build and maintain REST API endpoints called by the voice AI agent — customer file lookups, caller identity validation, and escalation triggers
Integrate with the Qualia GraphQL API to pull real estate transaction data and build a caching layer for fast property lookups
Connect with Microsoft Teams via the Graph API to notify staff when a caller requires a callback
Design and maintain the PostgreSQL database — staff directory, routing configuration, call analytics, and cached data
Set up job scheduling for Qualia data syncing and automated callback workflows
Build the admin dashboard in Retool so the client's team can manage configuration and review call logs without engineering support
Collaborate closely with the AI/Voice engineer and technical lead — communication with the client flows through the PM and tech lead

Requirements

What you’ll need

Strong Node.js / TypeScript backend development — production-grade, not just prototypes
REST API design — security (token-based auth, IP whitelisting), documentation, and edge case handling
PostgreSQL — schema design, queries, and full-text search (pg_trgm or similar)
Experience integrating third-party APIs in production — OAuth flows, webhook handling, and failure recovery
AWS experience — ECS/Fargate, RDS, S3, and basic networking (or equivalent cloud platform)
Professional English proficiency — clear written communication in Slack and pull requests
Comfortable working independently, raising blockers proactively, and communicating progress in standups

Benefits

Comp & perks

$5,000/month — paid in USD, bi-weekly via Deel
Fully Remote — work from anywhere in Latin America
Long-term contract — starting with a 6-month contract, then full-time
Paid PTO — competitive package
Referral Program — earn a bonus for referring talent that gets hired

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Node.jsTypeScriptREST API designPostgreSQLGraphQLOAuthwebhook handlingAWSECSFargate

Soft Skills

clear written communicationindependent workproactive problem solvingcommunication in standups