Job description
 
                         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  
Mandatory Skills Description:    
• 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 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 Skills Description:    
• 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  
Languages:    
English: B2 Upper Intermediate  
 
                    
                    Required Skill Profession
 
                     
                    
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