Back-End Developer III

GFT Technologies

Backend Developer optimizing applications based on Large Language Models and ensuring efficient prompt responses at GFT, fostering innovation in AI solutions.

Posted 5/24/2026full-timeRemote • 🇧🇷 BrazilMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

AWSCloudDjangoDockerDynamoDBPython

About the role

Key responsibilities & impact

Develop and optimize applications based on Large Language Models (LLMs), ensuring response quality and prompt efficiency;
Agent Orchestration: Design and implement complex flows and multi-agent systems using LangChain and LangGraph for reasoning automation;
Data Architecture for AI: Implement RAG (Retrieval-Augmented Generation) strategies, including vector databases and indexing techniques for semantic search;
Backend Development: Build robust, high-performance APIs in Python (FastAPI/Django) to serve AI models at scale;
Cloud Scalability: Develop and deploy solutions using the AWS ecosystem, focusing on AI services, serverless computing, and containers;
Quality and Monitoring: Establish model testing standards (evaluation of hallucinations, latency, and cost) and ensure the development lifecycle (LLMOps).

Requirements

What you’ll need

Advanced Python: Deep mastery of the language, including concurrency, static typing, and software engineering best practices (SOLID, Clean Code);
AI Frameworks: Strong experience building chains with LangChain and cyclical/graph workflows with LangGraph;
LLM Providers: Experience integrating models via APIs (OpenAI, Anthropic) and via AWS Bedrock;
Cloud Computing (AWS): Hands-on knowledge of Lambda, ECS/EKS, S3, and databases (RDS/DynamoDB);
Software Engineering: Proficiency with Git, Docker, and CI/CD pipelines applied to backend projects.

Benefits

Comp & perks

Multi-benefits card – choose how and where to use it.
Education grants for undergraduate, graduate, MBA, and language courses.
Certification incentive programs.
Flexible working hours.
Competitive salaries.
Annual performance reviews with a structured career plan.
Opportunity for international career development.
Wellhub and TotalPass.
Private pension plan.
Childcare assistance.
Health insurance.
Dental insurance.
Life insurance.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

PythonLangChainLangGraphRAGFastAPIDjangoAWSGitDockerCI/CD

Soft Skills

problem-solvingcommunicationcollaborationcritical thinkingattention to detail