Key skills

Backend DevelopmentAPI DevelopmentDatabase Performance OptimizationAI Model Training and Fine-TuningModel Evaluation and InferenceRetrieval-Augmented Generation (RAG)EmbeddingsSemantic SearchVector DatabasesData Preparation for AI TrainingBackground Jobs and QueuesCaching and MonitoringRAIArtificial IntelligenceRAGCaching

About this role

R-ainbow Marketplace is a mission-driven digital platform that connects small producers with buyers through a data-driven online marketplace. The Artificial Intelligence Engineer will build scalable backend systems and APIs while developing, integrating, evaluating, and improving AI models using company data.

Responsibilities:

Design and build secure, scalable backend services and APIs
Improve API speed, reliability, database performance, and resource usage
Work with third-party, self-hosted, and in-house AI models
Prepare, structure, and manage internal data for AI training
Build model training, fine-tuning, evaluation, and inference pipelines
Use techniques such as RAG, embeddings, semantic search, and vector databases
Connect AI models with live business data and backend services
Build background jobs, queues, caching, event tracking, and monitoring
Measure model accuracy, response time, cost, and output quality
Prevent AI models from returning incorrect or unverified business data
Help decide whether to use external models, open-source models, or internally trained models
Create a backend foundation that can support growing data, traffic, and AI use cases