OverviewProject descriptionWe 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 weekMust have- Experience in front-end development (preferably React) for building migration dashboards and progress monitoring interfaces (2+ years)- 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 translationsNice 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 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#J-18808-Ljbffr