Full Stack Python Developer

Job Title: Full Stack Python DeveloperPay Rate: 77/hr - $85/hr on W2 (For H1b - 77 hr) Duration: 24 monthsLocation: San Francisco, CA
We are seeking a Senior Full Stack Python Developer to join a Scrum-based engineering team responsible for modernizing a mission-critical financial application currently operating on legacy mainframe systems. This platform serves as a central system of record supporting enterprise financial reporting and downstream general ledger systems.This role is primarily backend-focused, requiring strong expertise in Python and PySpark, with contributions to frontend development as needed. The ideal candidate will serve as a technical subject-matter expert (SME), guiding teams transitioning from mainframe technologies to modern distributed platforms. Key Responsibilities

• Design, develop, and modernize backend services, replacing legacy mainframe functionality
• Build scalable data ingestion, validation, and transformation pipelines using Python and PySpark
• Develop and maintain REST APIs using FastAPI and/or Flask
• Contribute to frontend development using React or Angular
• Collaborate closely with Product Owners, Operations teams, and business stakeholders
• Ensure data integrity and accuracy for financial data feeding general ledger systems
• Participate in architecture discussions, code reviews, and technical design decisions
• Mentor engineers transitioning to modern Python-based platforms
• Support Agile/Scrum delivery processes
• Implement CI/CD practices and support containerized cloud deployments

Required Qualifications

• 7+ years of professional software engineering experience
• Strong hands-on experience with Python and PySpark
• Experience building backend APIs using FastAPI or Flask
• Frontend development experience with React and/or Angular
• Experience with relational databases such as SQL Server or Exadata
• Agentic AI frameworks such as LangGraph, LangChain, or A2A
• Experience with Kafka or real-time streaming platforms
• CI/CD tools, including GitHub Actions, Jenkins, and Azure DevOps
• Containerization and orchestration using Kubernetes
• Experience working within Agile/Scrum environments
• Strong communication, documentation, and stakeholder collaboration skills
• Ability to mentor and provide technical leadership without formal management responsibilities

Preferred / Nice-to-Have Skills

• Additional programming languages: Java, Scala, SQL, HiveQL
• Big Data technologies: Hadoop, Spark, Hive, HDFS, Cloudera, Hortonworks
• Cloud experience with AWS (Glue, Lambda, S3, Redshift, CloudWatch)
• ETL/ELT tools such as Databricks or AWS Glue
• Workflow orchestration tools such as Airflow or Autosys
• Experience in financial services, accounting platforms, or enterprise reporting systems