Modernization as a Service (MaaS) is a horizontal practice, supporting all business verticals in the company.
We are looking for a Senior Python Developer who will be able to work with different modernization projects.
- 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
MUST
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
- 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
Luxoft DXC
2000
Luxoft, a DXC Technology Company is a global digital strategy and software engineering firm with over 17,000 international employees within its 58 offices in 29 countries. It is headquartered in Zug, Switzerland.
In January 2019, Luxoft was acquired by U.S. company DXC Technology. Luxoft partnered with LG Electronics to create a next-generation Autonomous Mobility concept vehicle that integrates consumers' personalized digital lifestyles into a driving experience. Luxoft enabled Switzerland's first Blockchain based e-vote platform with the City of Zug and Hochschule Luzern's Blockchain Lab.
Luxoft, a DXC Technology Company is a world-renowned company. It has been present on the Polish market for over 13 years. We have offices in Krakow, Warsaw, Wroclaw, and Gdansk. We employ over 2,000 professional experts carrying out projects for over 100 clients from the financial, automotive, medical, tourist industries, etc. We work for many international clients, including the USA, Great Britain, and Switzerland.
So far, Luxoft Poland has made a name for itself as a company that offers work on innovative projects, we offer various experiences in the field of IT, opportunities for rapid development, an extensive training program, and attractive benefits for employees.
At present, 62% of Luxoft Poland employees come from Poland, and 38% from around 50 countries, including Ukraine, Brazil, India, Turkey, Spain, Portugal, Italy, Romania, USA, etc.
At Luxoft, a DXC Technology Company almost 80 percent of employees are experts with the "Senior" experience level, with at least five years of experience. We care about our employees, so every day we try to provide them with the best possible conditions for work and development.
Technology is our passion! We focus on top engineering talent means that you will be working with the best industry professionals from around the world. Because of that, Luxoft is a global family with an epic atmosphere – we love what we do!