front, back & full stack

Mid/Senior Fullstack Developer (LLM)

We are looking for a Fullstack AI Engineer to join an innovative AGR Tech project from the ground up, focused on building a neural-language-based 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

schedule

Full Time

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Work Contract

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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;

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.

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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 FastAPI;

Experience 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.

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Other information

- 100% remote job.

- Flexible work environment.

- Periodic feedback focused on professional development.

Questions about joining our team?

remote/office work

We are a fully remote company, but we value in-person connections. We host annual trips for the entire team to collaborate and bond, and some teams organize additional meetups throughout the year to work together.

what does "flexible work" mean at KIS?

You can choose your work hours, as long as you meet your team and client's main meetings, cerimonies and deliveries. Apart from those ceremonies, you can choose how to distribute the remaining hours of your day. Just make sure you're communicating frequently and clearly.

how we keep our teams together

We have performance plans, feedback and follow-up sessions, social gatherings (online and offline) and laid-back events to keep the teams engaged and united.

how does our contract work?

Our contracts are based on Legal Person agreements (PJ in Brazil). Let us know if you need help explaining this contract model.

couldn’t find all the answers you need?

Contact our team and learn more about careers at KIS.