Senior Software Engineer, ML Platform | Parafin

Senior Software Engineer, ML Platform | Parafin San Francisco, CA (Hybrid)
$230K+Base with Competitive Equity
Visa Sponsorship Available (H-1B Transfers & O-1) Parafin is seeking a Senior Software Engineer, ML Platform to own and scale the infrastructure powering machine learning-driven underwriting and financial products. This is a unique opportunity to build a critical ML platform from the ground up, enabling Data Scientists to efficiently develop, deploy, monitor, and scale production ML models that directly impact small businesses across partner ecosystems including Amazon, DoorDash, Walmart, and TikTok. What You'll Do

• Architect and build the next generation ML Platform supporting experimentation, training, deployment, inference, monitoring, and retraining.
• Transform data science workflows into production-grade software by building reusable libraries, pipelines, frameworks, SDKs, CLIs, templates, and developer tooling.
• Design and scale real-time inference infrastructure, ensuring low latency, reliability, and high availability.
• Expand and optimize large-scale batch inference systems, focusing on scheduling, observability, cost optimization, rollback capabilities, and operational excellence.
• Own and evolve the feature store ecosystem, including offline and online feature management, point-in-time correctness, high-throughput access patterns, and feature governance.
• Drive platform reliability through monitoring, alerting, dashboards, incident response, model performance tracking, drift detection, data quality validation, and infrastructure observability.
• Partner closely with Data Science, Infrastructure, and Product teams to support underwriting systems, define model interfaces, establish SLAs, and implement production safeguards.

Required Qualifications✔ 5+ years of Software Engineering experience, including ML Platform, MLOps, Data Infrastructure, or Machine Learning Engineering environments.✔ Strong software engineering fundamentals with expertise in:

• Python
• SQL
• Software architecture & design
• Testing and code quality

✔ Hands-on experience with:

• Spark / PySpark
• Databricks
• MLflow
• Airflow (or equivalent orchestration tools)
• AWS Cloud Services

✔ Experience building:

• Feature Stores
• Model Registries
• ML Deployment Pipelines
• Real-Time Inference Systems
• Large-Scale Data Processing Platforms
• Batch and Streaming Data Architectures

✔ Strong understanding of:

• ML lifecycle management
• Model evaluation & validation
• Feature engineering
• Drift monitoring
• Experiment tracking
• Production ML best practices
• Probability & Statistics fundamentals

✔ Proven ability to build scalable platforms that enable Data Scientists and ML Engineers to operate efficiently at scale.Preferred QualificationsExperience with:

• Kafka or Kinesis
• Feast, Tecton, or similar Feature Store technologies
• Databricks Model Serving
• Low-latency model serving architectures
• A/B testing platforms
• Shadow deployments
• Canary releases
• Automated rollback frameworks

Domain expertise in:

• FinTech
• Lending
• Credit Risk
• Underwriting
• Risk Modeling
• Financial Services

Previous experience in startup or high-growth environments where you've built systems from the ground up and influenced technical strategy.Ideal CandidateWe're looking for an engineer who thinks beyond model development and focuses on building the infrastructure that makes ML teams successful. The ideal candidate has built reusable, scalable, software-engineering-grade platforms that empower data scientists to ship models safely and efficiently into production.You'll thrive in this role if you enjoy solving platform-scale challenges, influencing architectural direction, working in fast-paced environments, and taking ownership of mission-critical systems. Experience supporting high-volume ML workloads and enabling cross-functional teams is highly valued.Why Join Parafin?✅ Ground-floor ownership of a critical ML Platform initiative✅ Direct impact on financial products serving millions of users through leading technology platforms✅ Opportunity to shape company-wide ML architecture and infrastructure strategy✅ Backed by top-tier investors with over $194M raised✅ High-growth environment with significant investment in platform modernization and scalability✅ Competitive compensation, equity participation, and visa sponsorship support✅ Work alongside exceptional engineers, data scientists, and infrastructure leaders solving complex real-world challenges.Tech Stack Python | SQL | Spark | PySpark | Databricks | MLflow | Airflow | AWS | Snowflake | Kafka | Kinesis | Feature Stores | Real-Time Inference | MLOps PlatformsIf you're passionate about building world-class ML infrastructure and enabling machine learning at scale, we'd love to hear from you.#Hiring #SeniorSoftwareEngineer #MLPlatform #MLOps #MachineLearningEngineering #Python #Spark #PySpark #Databricks #MLflow #AWS #Kafka #FeatureStore #DataEngineering #FinTech #InfrastructureEngineering #SoftwareEngineering #AIJobs #TechHiring #SanFranciscoJobs #MachineLearningInfrastructure #DistributedSystems #PlatformEngineering #HiringNowPay: From $230,000.00 per yearBenefits:

• Flexible schedule
• Relocation assistance

Application Question(s):

• "Do you have experience building and scaling ML platforms/MLOps systems, including model deployment, feature pipelines, real-time/batch processing, and technologies such as Python, Spark/PySpark, AWS, Databricks, MLflow, and Airflow?" (Yes/No)
• Current Compensation ?

Expected Compensation?

• Do you possess all the required skills ;

Skills: Python, SQL, Spark/PySpark, AWS, Databricks, MLflow, Airflow, Feature Stores, Real-Time & Batch Pipelines, MLOps/ML Platforms. (Yes/No) Experience:

• Software Engineering: 5 years (Required)
• ML Platform & MLOps Infrastructure, Training, Deployment : 5 years (Required)

Work Location: Hybrid remote in San Francisco, CA 94114