Junior to Mid-Level Software Engineer — AI First, Full Stack
Custom AI Solutions | Remote (Brazil) | Contract Engagement
About the Role We are looking for a junior-to-mid level Software Engineer to engage with our engineering team as a dedicated contributor on VoxaCor™ and BridgeNode™. You will collaborate with our senior engineering team building features, fixing bugs, and running quality assurance across the platform.
This is a real engineering role — not an internship, not a ticket-taker. You will be working on production AI systems from day one. We're looking for someone early in their career who wants hands-on experience building AI-powered products that are already in market.
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 full-stack features across web, voice, and SMS channels
Write clean, tested code against well-defined tickets and technical specs
Run QA across platform features — identify, document, and help resolve bugs
Assist in integrating LLM and voice pipeline components under senior guidance
Contribute to BridgeNode™ open-source framework and VoxaCor™ platform features
Participate in code review and grow your skills through direct collaboration with senior engineers
Tech Stack
Backend: Node.js, TypeScript, PostgreSQL, Docker
Frontend: React 19, TypeScript, Tailwind CSS, shadcn/ui, PWA
Voice & Telephony: Telnyx, Deepgram (STT/TTS), WebRTC, SIP
AI / LLM: Anthropic Claude, Google Gemini, Mastra orchestration
Infrastructure: Azure, GitHub Actions CI/CD, multi-tenant architecture
Compensation
Structure: Paid twice monthly in USD for work performed
On-Target Earnings: $18K–$30K USD - depending on experience
Qualifications
1–3 years of software engineering experience or equivalent demonstrated project work
Proficiency in TypeScript and React — you've built and shipped something real
Solid understanding of REST APIs and relational databases
Ability to read and understand existing codebases and contribute without breaking things
Professional English proficiency — written and verbal communication must be clear, accurate, and effective for async collaboration with a US-based team
Available to overlap with US Mountain/Pacific business hours
Registered legal entity in Brazil — required for contract engagement (not negotiable)
Strong Pluses
Any hands-on experience with LLM APIs or AI-powered features
Exposure to voice, telephony, or real-time streaming systems
Open-source contributions or a portfolio of personal/professional projects
Experience with Docker or cloud deployment (Azure, AWS, GCP)
Background in transportation, logistics, or dispatch software ecosystems
What We're Looking For The ideal candidate is serious about their craft. You don't wait to be told what to do — you read the ticket, ask the right questions, and get it done. You take feedback well and use it to level up. You're excited about AI because you've started digging into the stack and want to go deeper. This role will grow with you if you show up ready to work.
Not a Fit If
You have no professional or project-based coding experience to show
You're looking for a short-term or internship-style engagement
You don't have a registered Brazilian entity to contract through
You need extensive hand-holding to complete assigned work
Your written English is not strong enough for clear, professional async communication
Skills Required
- 1-3 years of software engineering experience or equivalent project work
- Proficiency in TypeScript
- Proficiency in React
- Solid understanding of REST APIs and relational databases
- Ability to read and understand existing codebases and contribute without breaking things
- Professional English proficiency (written and verbal)
- Available to overlap with US Mountain/Pacific business hours
- Registered legal entity in Brazil for contracting
- Hands-on experience with LLM APIs or AI-powered features
- Exposure to voice, telephony, or real-time streaming systems
- Open-source contributions or portfolio of projects
- Experience with Docker or cloud deployment (Azure, AWS, GCP)
- Background in transportation, logistics, or dispatch software ecosystems
What We Do
Custom AI Solutions, LLC specializes in designing and deploying emotionally intelligent, voice-first AI agents to solve complex business communication challenges. The company creates customized Intelligent Voice Agents (IVAs) that integrate seamlessly with existing systems to automate high-volume inbound and outbound calls, including scheduling and customer service. Their mission is to empower organizations across various industries, such as healthcare and transportation, with AI that functions as a trusted team member.
