Senior Python Developer
Luxoft
Gestión de inversiones
Madrid - Spanien
Project Manager Sénior / Especialista sénior
Publicada hace 30+
Descripción del puesto
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 systems Graph 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
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 systems Graph 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
