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.
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
Required Skill Profession
Computer Occupations