Hi, my name is
Yujia Lin.
I build things at scale.
Building high-scale systems at the intersection of fintech, AI, and distributed infrastructure.
01.About Me
Senior full-stack software engineer with 8+ years of experience in financial services, fintech, and enterprise software — with hands-on AI/ML/NLP engineering in production. I've fine-tuned LLMs, built IVR infrastructure handling hundreds of thousands of migrated accounts, and architected systems tracking 6.5M+ monthly customer interactions. I thrive in high-ownership environments where engineering decisions directly drive business outcomes.
I'm a Y Combinator Startup School alum (2018) and have worn many hats — from co-founding a restaurant tech platform to leading engineering teams at a Fortune 500 financial institution. I believe in ownership, fast iteration, and shipping things that actually matter.
Certifications & Memberships:
- AWS Certified Solutions Architect – Associate
- Senior Member, IEEE
- Member, Cloud Native Computing Foundation (CNCF)
8+
Years of Experience
6.5M+
Monthly Interactions Tracked
$200K+
OPEX Savings Delivered
02.Experience
Senior Software Engineer @ Capital One
Apr 2023 – Present · Remote
- Led a team of 5 engineers to fine-tune Mistral-7B on IVR call transcripts using PyTorch and AWS SageMaker; integrated into a LangChain chatbot surfacing real-time summaries for 10K+ agents — eliminating caller repetition.
- Led IVR routing for the Capital One BackBook migration, directing 500K+ migrated Discover accounts with zero service disruption.
- Designed and built a full-stack IVR monitoring system tracking 6.5M+ monthly calls with real-time alerting and anomaly detection.
- Delivered a self-service IVR integration projected to save $200K+ annually in OPEX by automating fraud and dispute workflows.
- Modernized IVR architecture from legacy VXML to Omilia Cloud Platform, improving routing efficiency by 20%.
- Expanded Omilia IVR to support Spanish NLU, driving a 4% increase in self-service utilization.
03.Skills
Languages
AI / ML
Frontend
Backend
Data & Messaging
Cloud & DevOps
04.Projects
Omilia IVR Dashboard
Production monitoring platform for IVR call infrastructure at Discover Financial Services. Surfaces real-time API error rates, call-flow drop-off points, and anomaly alerts with immediate visibility into service degradation.
- 6.5M+ monthly interactions tracked
- Faster incident detection & root-cause analysis
- Improved SLA adherence across contact center
BunBao ERP System
Custom ERP platform built from scratch to support a multi-location food business. Became the operational backbone covering purchasing, HR, inventory, vendor payment reconciliation, and cost center reporting.
- 20K+ customers served
- 2K+ daily delivery boxes processed
- 100+ employees managed
Menupedia Digital Ordering Platform
Digital ordering and delivery SaaS for restaurants. As co-founder, designed the product, built the full stack, onboarded clients, and ran a live delivery service on top of the platform.
- 20% reduction in table turnover time
- Eliminated paper-based workflows
- Y Combinator Startup School 2018
05. What's Next?
Get In Touch
I'm currently open to senior engineering and technical leadership roles — especially at startups moving fast in fintech, AI, or infrastructure. Whether you have a role in mind or just want to talk tech, my inbox is open.