Senior Fullstack Engineer: GenAI & Cloud API Pro

Bonapolia; Warszawa; On-site; PLN 250,000 - 350,000; Full time

Job summary

Bonapolia is seeking a Senior GenAI Engineer to join a global internal team focused on GenAI initiatives. You will develop Python-based applications, deploy on AWS Bedrock, and design scalable APIs with a strong emphasis on data processing using PostgreSQL, Pandas, and OpenSearch.

The role requires cross-functional collaboration across regions and a hands-on, proof-of-concept delivery mindset. The ideal candidate has senior-level experience with React/Next.js frontends, LangGraph, LangChain, and

Qualifications

• Experience with Python and FastAPI in production environments.
• Hands-on GenAI and agentic development using LangGraph and LangChain.
• Experience with managed cloud GenAI services (AWS Bedrock/AgentCore or similar).
• Strong PostgreSQL and relational DB development experience.
• Hands-on with Pandas and Excel for data processing.
• Frontend experience with Next.js and React.
• Experience using AI-assisted dev tools (Cursor, Claude Code, Codex).
• Experience designing scalable APIs and backend services.

Responsibilities

• Develop, test, and maintain Python-based applications and services.
• Deploy and configure apps in AWS environments.
• Manage infrastructure using IaC while considering performance and cost.
• Work with PostgreSQL (pg_vector) or OpenSearch/Elasticsearch for vector data and RAG use cases.
• Design and implement GenAI agents using AWS Bedrock.
• Evaluate GenAI frameworks vs direct API integrations for use cases.
• Explore multi-agent solutions with AutoGen where appropriate.
• Investigate and resolve issues, optimize performance and reliability.
• Collaborate with stakeholders across global regions and drive innovation.

Skills

Python

FastAPI

GenAI

LangGraph

LangChain

AWS Bedrock

PostgreSQL

Pandas

Excel

Next.js

React

OpenSearch/Elasticsearch

AI-assisted tools

API design

Multi-agent systems

Tools

Next.js

React

PostgreSQL

OpenSearch/Elasticsearch

AWS Bedrock

Terraform

Docker

Job description

Bonapolia is seeking a Senior GenAI Engineer to join a global internal team focused on GenAI initiatives. You will develop Python-based applications, deploy on AWS Bedrock, and design scalable APIs with a strong emphasis on data processing using PostgreSQL, Pandas, and OpenSearch.

The role requires cross-functional collaboration across regions and a hands-on, proof-of-concept delivery mindset. The ideal candidate has senior-level experience with React/Next.js frontends, LangGraph, LangChain, and