Python Developer- Only W2

Role: Senior Software Engineer Python / PySpark (Mainframe Modernization)
Location: San Francisco, CA 94105 (Hybrid 3 Days Onsite)
Duration: 24 Months

Overview:

• We are seeking a Senior Software Engineer with deep expertise in Python, PySpark, and backend engineering to support a large-scale mainframe modernization initiative within a financial enterprise environment. The role focuses on rebuilding mission-critical financial systems onto distributed, cloud-native platforms while mentoring teams transitioning from legacy mainframe technologies.
• This is a highly technical individual contributor role requiring strong backend development, data engineering, stakeholder communication, and modern software architecture experience.

Key Responsibilities:

• Modernize legacy mainframe applications into distributed backend platforms
• Develop scalable backend services using Python, PySpark, FastAPI, and Flask
• Build and optimize data ingestion, transformation, and validation pipelines
• Support real-time data streaming using Kafka
• Contribute to frontend functionality using React and Angular when required
• Collaborate within Agile/Scrum teams alongside Product Owners and business stakeholders
• Mentor engineers transitioning from mainframe technologies into modern Python ecosystems
• Participate in architecture discussions, code reviews, and technical design sessions
• Support CI/CD pipelines, Kubernetes deployments, and cloud-native application delivery
• Ensure financial data accuracy and integrity across downstream accounting systems

Required Skills:

• 7+ years of software engineering experience
• Strong hands-on expertise in Python and PySpark
• Backend frameworks: FastAPI and/or Flask
• Frontend exposure: React and/or Angular
• Database experience: SQL Server and/or Exadata
• Streaming technologies: Kafka
• Experience in Agile/Scrum environments
• Strong communication and mentoring abilities
• CI/CD and containerization experience (GitHub Actions, Azure DevOps, Kubernetes)

Preferred Skills:

• Agentic AI frameworks: LangChain, LangGraph, A2A
• Big Data ecosystem: Spark, Hadoop, Hive, HDFS, Cloudera
• AWS services: Glue, Lambda, Redshift, S3, CloudWatch
• Databricks and ETL/ELT pipelines
• Financial services or accounting domain experience

Regards

Tim Patten

tim (at) pullskill (dot) com

551-272-o2o3