Full Stack Software Engineer – AI Agents

Blanc Labs

. Build and ship backend services, APIs, and Next.js interfaces .

Posted 10/27/2026full-timeToronto • CanadaJuniorMid-LevelWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and shipping backend services and APIs, with strong capabilities in Python, React, and TypeScript. Proficient in integrating real-time communication channels and designing robust data models while ensuring compliance with data residency requirements.

Highest-signal resume keywords

Python ProgrammingAsynchronous ProgrammingReact DevelopmentPostgreSQL Database ManagementDocker and Cloud Platform Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend Services DevelopmentAPI DevelopmentNext.js DevelopmentAI Agent CapabilitiesData Model DesignBackground Job ProcessingLogging and Metrics InstrumentationDebugging and TroubleshootingLLM IntegrationSQL

Soft Skills

Problem-SolvingCuriosityCommunication

Tools & Technologies

FastAPIAzureWebRTCSIPSMS APIs

Industry Keywords

Real-Time MediaTelephonyData ResidencyCompliance Requirements

Tech Stack

Tools & technologies

AssemblyAzureCloudDockerJavaScriptNext.jsPostgresPythonReactSQLTypeScript

About the role

Key responsibilities & impact

Build and ship backend services, APIs, and Next.js interfaces
Develop AI agent capabilities including prompt assembly, tool and function calling, streaming responses, and conversation state
Integrate real-time voice and messaging channels such as telephony, SMS, and web
Design data models and migrations with consistency and safe change
Build background jobs and outbound processing with retry and failure handling
Instrument services with logging, metrics, and tracing
Debug issues end to end, from the interface to live conversations
Contribute ideas to the roadmap and prototype new agent capabilities

Requirements

What you’ll need

2 to 5 years of professional software engineering experience
Production code that has been shipped and supported
Strong Python, including asynchronous programming (asyncio, FastAPI, or similar)
Experience with React and TypeScript
Comfort with relational databases, PostgreSQL, SQL, and migrations
Hands-on experience building with LLMs, professionally or through side projects
Working knowledge of Docker and a major cloud platform; Azure preferred
Habit of reading documentation, testing hypotheses, and asking good questions
Nice to have: Next.js experience
Nice to have: Real-time media or telephony experience, including WebRTC, SIP, programmable voice, or SMS APIs
Nice to have: LLM evaluation or agent frameworks
Nice to have: Experience with data residency or compliance requirements

Benefits

Comp & perks

Full-time employment (FTE)
Hybrid work arrangement
Opportunity to build and ship features used by real enterprise clients
Startup pace and ownership backed by an established firm
Opportunity to work on next-generation AI agent products