Mid/Senior Fullstack Developer

This is a remote position.

We are looking for a Fullstack AI Engineer to join an innovative AGR Tech project from the ground up, focused on building a communication system for client interactions. In this role, you will work directly with the CTO, contributing to both technical architecture and product evolution in a highly collaborative environment.

You will be responsible for designing, developing, and scaling modern fullstack applications, with a strong emphasis on AI-driven solutions and LLM integrations. This role is ideal for someone who enjoys building products from scratch, has strong ownership mindset, and is excited about applying artificial intelligence to solve real business problems.

Opportunity for Brazil residents only

What you'll do

Design and develop scalable fullstack applications from scratch

Build and maintain backend services using Python and FastAPI

Develop modern frontend interfaces using React

Collaborate directly with the CTO on technical decisions and product strategy

Design and implement AI-powered workflows and LLM integrations

Research, test, and apply new AI technologies to improve product capabilities

Create and maintain APIs, integrations, and data pipelines

Contribute to system architecture, scalability, and performance improvements

Participate in rapid product iterations and technical validations

Translate business and product requirements into technical solutions

Collaborate with cross-functional stakeholders in a fast-paced startup environment

Ensure code quality, maintainability, and best development practices

Requirements

+3 years of experience in Fullstack Software Development

Knowledge in Python backend development

Experience building frontend applications with Javascript/React

Experience designing and consuming REST APIs

Interest in or hands-on experience with LLMs, AI tools, or AI-based products

Strong problem-solving skills and critical thinking

Ability to work autonomously and take ownership of technical decisions

Comfort working in early-stage products with evolving requirements

Collaborative mindset and strong communication skills

Nice-to-have:Experience with Python and FastAPIExperience with AI agents, prompt engineering, or RAG architectures

Experience with cloud platforms such as AWS

Experience with Docker and CI/CD pipelines

Startup or product-building experience

Experience working closely with technical leadership or founders