Programmer - Python Developer

Luxoft Spain; Madrid; Presencial; EUR 50.000 - 75.000; Jornada completa

Descripción de la vacante

A technology services firm in Madrid is seeking an experienced Senior Python Developer to assist in migrating a legacy banking system to a cloud-based environment. The ideal candidate will have expertise in FastAPI, Python, and mainframe technologies. Responsibilities include collaborating with teams, maintaining migration applications, and optimizing performance across cloud environments. This position requires mandatory office attendance 5 days a week.

Formación

• Experience with FastAPI for building REST APIs.
• Proficient in Python for migration processes.
• Understanding of mainframe systems and their integration.

Responsabilidades

• Collaborate with teams to achieve project goals.
• Optimize RAG application for migration processes.
• Build FastAPI-based microservices for migration workflow.

Conocimientos

FastAPI

Pydantic

Python

Graph database

COBOL

Java

Assembly language

Herramientas

Graph traversal algorithms

Mainframe utilities

React

Spring Boot

Descripción del empleo

Project Description :

We have an ambitious goal to migrate a legacy system written in HLASM (High-Level Assembler) from the mainframe to a cloud-based Java environment for one of the largest banks in the USA.

Responsibilities

We are looking for an experienced Senior Python Developer who can help perform the migration of the client platform :

• Collaborate with dev and client teams to ensure alignment with project goals and deliver high-quality solutions
• Maintain and fine-tune RAG application that supports the migration process, specifically optimizing LLM prompts for pattern recognition
• Build and maintain FastAPI-based microservices that orchestrate the migration workflow
• Mandatory work from the office 5 days per week

Proficiency in Python Development

• FastAPI for building high-performance REST APIs and WebSocket connections
• Pydantic for robust data validation in migration pipelines
• Vector database implementation for semantic search
• Graph database experience for code dependency mapping
• Building agents for code analysis, implementing custom tools for mainframe-specific transformations, creating chains for multi-step code migration
• Building knowledge bases from documentation, implementing hybrid search for code pattern matching, creating custom retrievers for language specific contexts
• Graph traversal algorithms for dependency analysis
• COBOL and PL / I for understanding integrated mainframe systems
• Assembly language debugging and performance optimization
• Mainframe utilities (DFSORT, IEBGENER, IDCAMS)
• Experience with mainframe subsystems : Experience in front-end development (preferably React) for building migration dashboards and progress monitoring interfaces
• Experience in Java development, particularly Spring Boot, to understand target architecture requirements
• Knowledge of performance tuning and optimization in cloud environments, including auto-scaling strategies and cost optimization