Location: San Francisco, CA
Salary: $79.00 USD Hourly - $85.00 USD Hourly
Description: Senior Software Engineer - Python / PySpark (Mainframe Modernization)Location: San Francisco, CA (333 Market St)
Work Model: Hybrid - 3 days per week in office (required)
Contract Duration: 24-month contract with potential conversion to Full-Time Employee (FTE)
About the RoleWe are seeking a
Senior Software Engineer to support the modernization of a mission-critical, mainframe-based financial application onto a distributed, cloud-native platform. This role is primarily backend-focused, with a strong emphasis on
Python and PySpark, and includes occasional frontend contributions using
React and Angular.
You will join a Scrum-based delivery team embedded within Corporate Accounting, working on a system that serves as the enterprise system of record for financial data and feeds downstream general ledger platforms. This is a high-impact role that directly supports enterprise financial reporting, controls, and compliance.
While this is an individual contributor role (no formal people management), you will act as a
technical subject matter expert (SME), mentoring engineers transitioning from legacy mainframe technologies to modern Python-based systems.
Responsibilities- Design, develop, and modernize backend services to replace legacy mainframe functionality on a distributed platform
- Build and maintain data ingestion, validation, and transformation pipelines using Python and PySpark
- Develop and support RESTful APIs using FastAPI and/or Flask
- Ensure data accuracy, reliability, and integrity for financial data feeding enterprise general ledger systems
- Collaborate within an Agile/Scrum team alongside Product Owners, Lines of Business stakeholders, and Operations teams
- Serve as a Python SME, providing technical guidance and mentorship to engineers transitioning from mainframe technologies
- Contribute to frontend development using React and Angular as required
- Participate in technical design discussions, architecture reviews, and code reviews
- Support CI/CD pipelines and cloud-native deployments using containerized platforms
- Communicate effectively through technical documentation, stakeholder discussions, and presentations to both technical and non-technical audiences
Required Qualifications- 7+ years of professional software engineering experience
- Strong expertise in Python, including production experience with PySpark
- Backend development experience with FastAPI and/or Flask
- Frontend development experience with React and/or Angular
- Experience working with SQL Server and/or Exadata
- Hands-on experience with Kafka or other streaming platforms
- Experience working in Agile / Scrum delivery environments
- Strong communication and stakeholder engagement skills
- Proven ability to guide and mentor engineers as a senior technical contributor
Preferred Qualifications- Experience in financial institutions or enterprise accounting environments
- Familiarity with financial data flows, general ledger concepts, and accounting terminology
Nice-to-Have Skills- Agentic AI frameworks: LangGraph, LangChain, A2A
- Programming Languages: Java, Scala, SQL, HiveQL
- Big Data Technologies: Hadoop, Spark, HDFS, Hive, Cloudera, Hortonworks
- Cloud Platforms: AWS (Glue, Lambda, Redshift, S3, CloudWatch)
- ETL / ELT Tools: AWS Glue, PySpark, Databricks
- Data Integration & Migration: Kafka, data lakes, real-time streaming architectures
- Data Modeling: Dimensional models; structured and unstructured data processing
- CI/CD & Automation: GitHub Actions, Azure DevOps, Jenkins, Git, Autosys, Airflow
- Containerization & Orchestration: Kubernetes
Ideal Candidate Profile- Senior-level individual contributor with deep backend engineering expertise
- Comfortable acting as a technical SME and mentor without direct people-management responsibilities
- Confident communicator capable of explaining complex technical systems clearly
- Collaborative, adaptable, and effective in cross-functional enterprise environments
By providing your phone number, you consent to: (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Message & data rates apply and message frequency may vary. Consistent with Judge's Privacy Policy, information obtained from your consent will not be shared with third parties for marketing/promotional purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.
Contact: This job and many more are available through The Judge Group. Please apply with us today! 
Never miss an opportunity! Create an alert based on the job you applied for.