Senior GenAI Engineer (Python, React)

Luxoft Poland; Poland; On-site; PLN 240,000 - 360,000; Full time

Job summary

Luxoft Poland is seeking a senior software engineer to design, develop, and maintain full-stack applications using Python, FastAPI, and React within an enterprise-grade agentic AI platform. You will build Agentic AI solutions using LLMs, LangChain, LangGraph, and orchestration frameworks, and contribute to backend services, data modeling in PostgreSQL, and Redis caching.

You will collaborate with architects, DevOps, and product stakeholders to deliver scalable, secure, and reliable cloud-native

Qualifications

• 7+ years of professional software development experience.
• Expert in Python and modern backend development.
• Experience with FastAPI and RESTful API design.
• Frontend experience with React.js.
• Hands-on experience building Agentic AI applications.
• Practical experience with LLMs (OpenAI, Azure OpenAI, Anthropic, or similar), LangChain, LangGraph, Langfuse.
• Strong knowledge of PostgreSQL.
• Experience with Redis.
• Understanding of software architecture, design patterns, and scalable distributed systems.
• Experience with Git, CI/CD pipelines, and modern development practices.
• Good communication skills and ability to work in an international environment.
• English: B2 or higher.

Responsibilities

• Design, develop, and maintain full-stack applications using Python, FastAPI, and React.
• Build and enhance Agentic AI solutions leveraging LLMs, LangChain, LangGraph, and AI orchestration frameworks.
• Develop backend services, APIs, and integrations with external systems and AI tools.
• Design and optimize data models and queries in PostgreSQL.
• Implement caching, session management, and performance optimization using Redis.
• Collaborate with architects, DevOps engineers, and product stakeholders to deliver scalable solutions.
• Ensure code quality through testing, code reviews, and adherence to engineering best practices.
• Contribute to system observability, monitoring, troubleshooting, and platform reliability.
• Participate in solution design and technical leadership.
• Support CI/CD processes and cloud-native application deployment.

Skills

Python

FastAPI

React.js

RESTful API design

Agentic AI applications

LLMs

LangChain

LangGraph

Langfuse

PostgreSQL

Redis

Git

CI/CD

English (B2+)

Tools

Azure OpenAI

Docker

Kubernetes

Job description

Join a team developing an enterprise-grade agentic AI platform that leverages AI agents, tools, skills, and orchestration capabilities to automate cybersecurity and business processes. The project involves building and enhancing modern GenAI solutions using technologies such as Python, Azure, RAG, MCP integrations, CI/CD, observability, and scalable cloud-native architectures. You will work on designing, developing, and industrializing advanced agent-based AI applications, contributing to new use cases, integrations, security features, and platform evolution.

Responsibilities:

• Design, develop, and maintain full-stack applications using Python, FastAPI, and React.
• Build and enhance Agentic AI solutions leveraging LLMs, LangChain, LangGraph, and AI orchestration frameworks.
• Develop backend services, APIs, and integrations with external systems and AI tools.
• Design and optimize data models and queries in PostgreSQL.
• Implement caching, session management, and performance optimization using Redis.
• Collaborate with architects, DevOps engineers, and product stakeholders to deliver scalable solutions.
• Ensure code quality through testing, code reviews, and adherence to engineering best practices.
• Contribute to system observability, monitoring, troubleshooting, and platform reliability.
• Participate in solution design and technical leadership.
• Support CI/CD processes and cloud-native application deployment.

Mandatory Skills Description:

• 7+ years of professional software development experience.
• Strong expertise in Python and modern backend development.
• Experience with FastAPI and RESTful API design.
• Strong frontend development experience with React.js.
• Hands-on experience building Agentic AI applications.
• Practical experience with LLMs (OpenAI, Azure OpenAI, Anthropic, or similar), LangChain, LangGraph, Langfuse.
• Strong knowledge of PostgreSQL.
• Experience with Redis.
• Understanding of software architecture, design patterns, and scalable distributed systems.
• Experience with Git, CI/CD pipelines, and modern development practices.
• Good communication skills and ability to work in an international environment.
• English: B2 or higher.

Nice-to-Have Skills Description:

• Experience with security testing, application security, or secure coding practices (preferred).
• Experience with Azure cloud services.
• Experience with RAG (Retrieval-Augmented Generation) architectures.
• Knowledge of Docker, Kubernetes, and cloud-native deployments.
• Exposure to cybersecurity, vulnerability management, or enterprise security platforms.