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Lead Python Developer

Lead Python Developer

LuxoftCiudad de México, Mexico
Hace 24 días
Descripción del trabajo

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 :
  • Troubleshoot, debug, and resolve issues in GenAI-powered code translation pipelines
  • 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
  • Implement RAG (Retrieval Augmented Generation) systems using LangChain / Langgraph / LlamaIndex for contextual code understanding
  • Design stateful migration workflows using LangGraph / LangChain / LlamaIndex for complex multi-step transformations
  • Mandatory work from the office 5 days per week

SKILLS

Must have

  • Proficiency in Python development (5+ years), with specific expertise in :
  • FastAPI for building high-performance REST APIs and WebSocket connections
  • Async programming patterns for handling concurrent migration tasks
  • Pydantic for robust data validation in migration pipelines
  • Experience with vector embeddings and embedding models
  • 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
  • Orchestrating stateful workflows for complex migration scenarios, managing checkpoints for long-running migrations, implementing conditional routing based on code patterns
  • Building knowledge bases from documentation, implementing hybrid search for code pattern matching, creating custom retrievers for language specific contexts
  • Implementing similarity search and semantic code retrieval systemsGraph traversal algorithms for dependency analysis
  • Strong problem-solving and debugging skills for identifying translation anomalies and semantic preservation issues
  • Excellent communication skills for collaboration with client teams and explaining complex technical translations

    • Nice to have

  • Deep understanding of HLASM instruction sets, macro definitions, and DSECT mappings
  • COBOL and PL / I for understanding integrated mainframe systems
  • Assembly language debugging and performance optimization
  • Mainframe utilities (DFSORT, IEBGENER, IDCAMS)
  • Experience with mainframe subsystems : CICS transactions, DB2 stored procedures, JCL batch processing
  • Knowledge of z / OS internals, linkage conventions, and program calling standards
  • Familiarity with EBCDIC to ASCII conversion, packed decimal (COMP-3) handling
  • 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
  • Familiarity with large-scale system migrations and modernization efforts, including phased migration strategies and dual-run validation
  • Prior experience working in the banking or financial services industry, understanding core banking concepts, regulatory requirements, and transaction processing
  • Knowledge of performance tuning and optimization in cloud environments, including auto-scaling strategies and cost optimization

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    Python Developer • Ciudad de México, Mexico