Senior Software Engineer - Python / PySpark

Genesis10 is currently seeking a Senior Software Engineer - Python / PySpark for a contract position with a Global Financial Institution located in San Francisco, CA. This is a 12+ month contract opportunity.We are seeking a Senior Software Engineer with deep backend expertise to join a Scrum-based delivery team modernizing a mission-critical financial system. This role is heavily backend-focused, with strong emphasis on Python and PySpark, while also contributing to frontend development using React and Angular as needed. This individual will serve as a technical SME, guiding a team that is actively upskilling from mainframe technologies into modern Python-based platforms, requiring strong mentorship, technical guidance, and exceptional communication skills.Responsibilities:Consult on complex initiatives with broad impact and large-scale planning for Software EngineeringReview and analyze complex multi-faceted, larger scale or longer-term Software Engineering challengesDesign, develop, and modernize backend services to replace legacy mainframe functionality on a distributed platformBuild and maintain data ingestion, validation, and transformation pipelines using Python and PySparkDevelop and support APIs using FastAPI and/or FlaskCollaborate within a Scrum team, partnering closely with Product Owners, LOB stakeholders, and OperationsAct as a Python SME, mentoring engineers transitioning from mainframe technologiesContribute to frontend development using React and Angular when requiredEnsure data accuracy and integrity for financial feeds flowing into general ledger systemsParticipate in technical design discussions, code reviews, and architecture decisionsCommunicate effectively through documentation, presentations, and stakeholder discussionsSupport CI/CD pipelines and cloud-native deployments using containerized platformsRequirements:7+ years of relevant professional software engineering experience, or equivalent demonstrated through work or consulting experience, training, military experience, or educationStrong expertise in Python, with production experience using PySparkBackend experience with FastAPI and/or FlaskFrontend experience with React and/or AngularExperience with SQL Server and/or ExadataHands-on experience with Kafka or other streaming platformsExperience working in Agile / Scrum delivery modelsStrong communication, presentation, and stakeholder engagement skillsAbility to guide and mentor other engineers as a senior technical contributorDesired skills:Experience in financial institutions or enterprise accounting environments is highly desirableFamiliarity with financial data flows, general ledger concepts, and accounting terminologyAgentic AI frameworks: LangGraph, LangChain, A2AProgramming Languages: Java, Scala, SQL, HiveQLBig Data Technologies: Hadoop, Spark, HDFS, Hive, Cloudera, HortonworksCloud Platforms: AWS (Glue, Lambda, Redshift, S3, CloudWatch)ETL / ELT Tools: AWS Glue, PySpark, DatabricksData Integration & Migration: Hadoop ecosystems, Kafka, real-time streaming, data lakesData Modeling: dimensional models, structured and unstructured data processingCI/CD & Automation: GitHub Actions, Azure DevOps, Jenkins, Git, Autosys, AirflowContainerization & Orchestration: KubernetesPay range: $69.84 - $77.84 per hourOnly candidates available and ready to work directly as Genesis10 employees will be considered for this position.If you have the described qualifications and are interested in this exciting opportunity, please apply!Ranked a Top Staffing Firm in the U.S. by Staffing Industry Analysts for six consecutive years, Genesis10 puts thousands of consultants and employees to work across the United States every year in contract, contract-for-hire, and permanent placement roles. With more than 300 active clients, Genesis10 provides access to many of the Fortune 100 firms and a variety of mid-market organizations across the full spectrum of industry verticals.For contract roles, Genesis10 offers the benefits listed below. If this is a perm-placement opportunity, our recruiter can talk you through the unique benefits offered for that particular client. Benefits of Working with Genesis10:Access to hundreds of clients, most who have been working with Genesis10 for 5-20+ years.The opportunity to have a career-home in Genesis10; many of our consultants have been working exclusively with Genesis10 for years.Access to an experienced, caring recruiting team (more than 7 years of experience, on average.)Behavioral Health PlatformMedical, Dental, VisionHealth Savings AccountVoluntary Hospital Indemnity (Critical Illness & Accident)Voluntary Term Life Insurance401KSick Pay (for applicable states/municipalities)Commuter Benefits (Dallas, NYC, SF, and Illinois)For multiple years running, Genesis10 has been recognized as a Top Staffing Firm in the U.S., as a Best Company for Work-Life Balance, as a Best Company for Career Growth, for Diversity, and for Leadership, amongst others. To learn more and to view all our available career opportunities, please visit us at our website.Genesis10 is an Equal Opportunity Employer. Candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.