Open to opportunities

Xiaofan Jin

@xiaofanjin2

Message

Senior software engineer building scalable, production-grade systems across fintech and retail.

United States

Message

What I'm looking for

I seek roles building high-availability, event-driven systems that integrate ML and observability; I value mentorship, cross-team impact, and measurable business outcomes.

I am a senior software engineer with over 10 years of experience designing and delivering scalable, production-grade systems across fintech, retail, and AI startups. I specialize in event-driven services, ML-integrated workflows, and real-time user interfaces, and I focus on measurable business outcomes like revenue contribution, latency reduction, and increased automation.

At SoFi and Amazon I led development of high-availability platforms and low-latency services using Java, Python, Go, React, GraphQL, and cloud infrastructure (AWS, Terraform, ArgoCD), integrating ML models and observability practices to improve reliability and reduce manual effort. I authored extensive automated tests, improved system availability to 99.99%, and reduced manual review and fraud exposure through ML-based detection.

I am collaborative and detail-oriented, with a track record of mentorship, cross-team ownership, and delivering customer-focused solutions that scale. I enjoy driving architecture and reliability improvements while coaching engineers and partnering with product and domain teams to deliver impactful results.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

SoFi

Jan 2024 - Present (1 year 11 months)

Developed and scaled the Loan Platform supporting $5.1B in originated personal loans and increased non-balance-sheet revenue contribution by 22% through routing, onboarding, and dashboard features that reduced manual escalations by 27%.

Java Spring Boot React TypeScript GraphQL PostgreSQL Redis AWS Terraform Kafka

Software Engineer II

Amazon

Sep 2018 - Jan 2024 (5 years 4 months)

Led engineering for Amazon Dash Cart, enabling 750K+ frictionless in-store transactions and contributing to a 38% increase in contactless checkout usage while improving UI latency and classification accuracy for 2.3M item scans.

React TypeScript Java Python AWS Terraform ECS Kinesis DynamoDB PyTorch

Software Engineer

Noonum

Jun 2017 - Dec 2017 (6 months)

Built graph ingestion and concept-to-company scoring systems for a thematic indexing platform, accelerating graph build time by 58% and enabling thematic equity ranking for analyst-led portfolio construction.