Senior Software Engineer - AI First, Full Stack

Visa Hunt; Brasil; Presencial; BRL 225 000 - 338 000; Tempo integral

Resumo da oferta

Visa Hunt is seeking a Senior Software Engineer to own architecture and platform reliability for VoxaCor and BridgeNode. You will collaborate directly with CTO and leadership to deliver real-time AI voice and SMS capabilities, with frontend and backend ownership across multiple surfaces.

You will work in a fully remote Brazil-based setup for a contract engagement, shipping production AI systems and contributing to open-source frameworks. Strong English and Brazil entity requirements apply.

Qualificações

• 5+ years of full-stack engineering with TS/Node.js and React.
• Production experience shipping AI-powered applications.
• Hands-on with LLM APIs and agent orchestration.
• Real-time systems experience: WebSockets or streaming APIs.
• Strong database and API design with PostgreSQL.
• Comfortable in multi-tenant SaaS architecture.
• Professional English for async collaboration with US team.
• Able to work independently and manage priorities.
• Registered Brazilian entity for contract engagement.

Responsabilidades

• Build and maintain real-time AI voice pipeline components: STT, TTS, LLM orchestration, telephony integration.
• Develop multi-tenant SaaS platform features across web, voice, and SMS channels.
• Implement AI agent workflows using orchestration frameworks and LLM integrations.
• Design and build backend services, APIs, and data models for high-volume workloads.
• Develop frontend interfaces and progressive web app features in React.
• Build platform tooling, admin interfaces, and partner-facing configuration systems.
• Contribute to BridgeNode open-source framework and VoxaCor proprietary layers.

Conhecimentos

Full-stack TS/Node.js

React

AI-powered apps

LLM orchestration

Real-time systems

PostgreSQL

Multi-tenant SaaS

English, async comms

Independent work

US time overlap

Ferramentas

Docker

PostgreSQL

WebSockets

LLM APIs

Descrição da oferta de emprego

Senior Software Engineer — AI Platform
Custom AI Solutions | Remote (Brazil) | Contract Engagement

About the Role We are looking for a Senior Software Engineer to engage directly with our CTO and engineering leadership as a dedicated platform engineer on VoxaCor™ and BridgeNode™. This is not a staff augmentation role — you will have real ownership across architecture decisions, feature development, and platform reliability.

VoxaCor™ is our AI voice and SMS platform built for high-volume, real-time communication. BridgeNode™ is the open-source AI conversation framework that powers it — every product CAIS builds runs on it. You will own significant surface area across both — from AI agent orchestration and real-time voice pipelines to frontend interfaces and infrastructure.

AI-first development is core to how we build — if you haven't shipped production AI systems, this role isn't for you.

This is a contract engagement. Applicants must have a registered legal entity in Brazil to contract through. This is a firm requirement and is not negotiable.

Key Responsibilities

Build and maintain real-time AI voice pipeline components: STT, TTS, LLM orchestration, and telephony integration

Develop multi-tenant SaaS platform features across web, voice, and SMS channels

Implement AI agent workflows using modern orchestration frameworks and LLM integrations

Design and build backend services, APIs, and data models supporting high-volume production workloads

Develop frontend interfaces and progressive web app (PWA) features in React

Build platform tooling, admin interfaces, and partner-facing configuration systems

Contribute to BridgeNode™ open-source framework and VoxaCor™ proprietary feature layers

Tech Stack

Backend: Node.js, TypeScript, PostgreSQL, Docker

Frontend: React 19, TypeScript, Tailwind CSS, shadcn/ui, PWA

Voice & Telephony: cloud telephony APIs, STT/TTS engines, WebRTC, SIP

AI / LLM: leading commercial LLM APIs, agent orchestration frameworks

Infrastructure: cloud platform, CI/CD pipelines, multi-tenant architecture

Compensation

Structure: Paid twice monthly in USD for work performed

On-Target Earnings: $44K–$66K USD - depending on experience

Qualifications

5+ years of full-stack engineering experience with TypeScript/Node.js and React

Production experience building and shipping AI-powered applications — not just prototypes

Hands-on experience with LLM APIs and agent orchestration

Real-time systems experience: WebSockets, streaming APIs, or telephony/voice pipelines

Strong database and API design fundamentals with PostgreSQL

Comfortable working in a multi-tenant SaaS architecture

Professional English proficiency — written and verbal communication must be clear, accurate, and effective for async collaboration with a US-based team

Able to work independently, manage your own priorities, and communicate proactively in English

Available to overlap with US Mountain/Pacific business hours for team collaboration

Registered legal entity in Brazil — required for contract engagement (not negotiable)

Strong Pluses

Experience deploying or self-hosting open-source LLMs in private or air-gapped infrastructure environments

Prior work in voice AI, telephony platforms, or real-time audio pipelines

Open-source contributions, particularly to frameworks or developer tooling

Experience with AI agent orchestration frameworks

Background in transportation, logistics, or dispatch software ecosystems

What We're Looking For The ideal candidate is an experienced, self-directed engineer who defaults to building. You don't need hand-holding — you read the requirements, ask the right questions, and ship. You're excited about AI not as a buzzword but because you've worked in the stack and understand what it takes to run these systems in production. You want a role where your work matters and your decisions have real impact.

Not a Fit If

You don't have direct experience shipping AI systems to production

You're looking for a short‑term engagement

You don't have a registered Brazilian entity to contract through

You need heavy management oversight to stay productive

Your English is not sufficient for async written collaboration

Originally posted on Himalayas