Hi, I'm Sam Noyes
Full-Stack Software Engineer at LangChain with 4+ years scaling systems for millions at Meta. Now pioneering AI/ML evaluation tools where scale meets innovation.
What I Do
I bridge the gap between massive scale infrastructure and cutting-edge AI/ML innovation, with proven experience serving millions of users and building the future of AI development tools.
Frontend Development
React, TypeScript, Next.js, and modern CSS frameworks
Creating responsive, accessible, and performant user interfaces with modern frameworks and best practices.
Backend Development
Node.js, APIs, databases, and server-side architecture
Building scalable backend systems, RESTful APIs, and database architectures that power modern applications.
Full Stack Solutions
End-to-end development and deployment
From concept to deployment, I handle the complete development lifecycle with modern DevOps practices.
About Me
Full-Stack Software Engineer passionate about building scalable solutions that bridge massive infrastructure with cutting-edge AI/ML innovation.
My Story
Software Engineer with 4+ years of experience building large-scale applications at Meta and LangChain. Specialized in full-stack development with proven track record of shipping features to millions of users. At Meta, led critical system migrations and optimized features resulting in 15M+ daily user interactions. Currently at LangChain, leading product development for AI/ML evaluation tools and building comprehensive testing frameworks.
Key Highlights
What Drives Me
Innovation
Constantly exploring new technologies and approaches to solve complex problems
Scale
Experience building systems that serve millions of users reliably
Quality
Writing clean, maintainable code with comprehensive testing and documentation
Professional Summary
- •Full-Stack Software Engineer at LangChain with 4+ years of experience at Meta and LangChain
- •Led systems serving 15M+ daily users at Meta, winning multiple Fixathons including 1st place out of 144 participants
- •Currently leading AI/ML evaluation product development at LangChain with focus on testing frameworks and tooling
- •Duke University graduate with dual BS in Computer Science and Electrical & Computer Engineering
Experience
4+ years of building scalable solutions at leading tech companies, from serving millions at Meta to pioneering AI/ML tools at LangChain.
Full-Stack Software Engineer
LangChain
Leading development of AI/ML evaluation platform serving the rapidly growing LangChain ecosystem. Architecting scalable solutions that help developers build more reliable AI applications through comprehensive testing and evaluation frameworks.
Key Achievements
- •Led full product lifecycle for LangSmith evaluations feature from conception to deployment
- •Independently built annotation queue frontend and backend systems
- •Spearheaded comparison view redesign improving user experience for AI model evaluation
- •Architected comprehensive end-to-end testing framework for AI evaluation tools
- •Built CI pipeline infrastructure enabling rapid iteration and deployment
Impact Metrics
Technologies Used
Software Engineer, Friending Experiences Team
Meta (Facebook)
Built and optimized critical infrastructure serving millions of daily users across Meta's platform ecosystem. Demonstrated consistent ability to deliver high-impact solutions in fast-paced, high-stakes environment.
Key Achievements
- •Led critical FBLite News Feed migrations that unblocked entire stack after senior engineer attempts failed
- •Optimized friend suggestion features resulting in 15M+ daily accepts and 1M daily High Value Accepts
- •Increased Close Friends story production by 60% through strategic feature enhancements
- •Won 1st place in Growth Org H1 2022 Fixathon out of 144 participants
- •Won team Q4 Fixathon demonstrating consistent problem-solving excellence
- •Collaborated with international teams in Tel Aviv on global feature rollouts
Impact Metrics
Technologies Used
Lead iOS Developer
Stealth Startup
Led mobile development for stealth startup, gaining early experience in startup agility and technical leadership.
Key Achievements
- •Led iOS application development from concept to launch
- •Gained early leadership experience in fast-paced startup environment
Impact Metrics
Technologies Used
Software Engineering Intern
Facebook (Meta)
Early exposure to large-scale systems development at Facebook, contributing to core platform features.
Key Achievements
- •Contributed to Facebook's core platform during internship
- •Successful internship completion leading to full-time offer
Impact Metrics
Technologies Used
Education
Bachelor of Science (Dual Degree)
Duke University
Dual degree program combining theoretical computer science with practical engineering applications. Built strong foundation in algorithms, system design, and hardware-software integration.
Projects & Impact
From serving millions at Meta to pioneering AI/ML tools at LangChain, here are some key projects that showcase my technical expertise and impact.
LangSmith Evaluations Platform
Led full product lifecycle for LangSmith's AI/ML evaluation system from conception to launch, enabling developers to test and evaluate AI models at scale.
Challenge
LangChain developers needed reliable ways to test AI applications, but existing evaluation tools were fragmented and didn't scale with increasing model complexity.
Solution
Architected comprehensive evaluation platform using React frontend with Python backend, leveraging ClickHouse for high-performance analytics and Postgres for relational data management.
Impact
Core feature enabling AI model evaluation at scale, now critical infrastructure for AI/ML development workflows across the LangChain ecosystem.
Key Metrics
Technologies
Friend Suggestions Optimization
Led optimization of friend suggestion features across Facebook's main platform, dramatically improving user engagement and connection rates.
Challenge
Friend suggestion algorithms needed optimization to improve relevance and user engagement while maintaining privacy and performance at massive scale.
Solution
Implemented advanced ranking algorithms and A/B testing frameworks using Hack/PHP backend with React frontend, optimizing for both user experience and system performance.
Impact
Delivered systems handling millions of daily users with significant improvements in connection rates and user satisfaction.
Key Metrics
Technologies
FBLite News Feed Infrastructure Migration
Led critical backend migrations that unblocked the entire FBLite News Feed stack after senior engineer attempts failed, preventing major service disruptions.
Challenge
Critical infrastructure migrations were blocking the entire FBLite News Feed stack, affecting millions of users globally. Previous attempts by senior engineers had failed.
Solution
Architected and executed comprehensive migration strategy using systematic approach to backend system modernization while maintaining service availability.
Impact
Successfully unblocked critical infrastructure serving millions of Facebook Lite users globally, preventing major service disruptions.
Key Metrics
Technologies
Want to see more details about any of these projects or discuss how I can help with yours?
Skills & Technologies
A comprehensive toolkit built through 4+ years of experience at Meta and LangChain, spanning full-stack development, AI/ML systems, and large-scale infrastructure.
Featured Skills
Frontend Development
Building responsive, interactive user interfaces
Backend Development
Server-side logic and API development
Database Management
Data storage and retrieval systems at scale
Mobile Development
iOS application development
AI/ML Engineering
AI model evaluation and ML infrastructure
DevOps & Infrastructure
CI/CD, testing frameworks, and deployment
Specialized Skills
A/B testing and large-scale system optimization
Want to discuss how these skills can help with your project?
Let's Build Together
Ready to collaborate on your next project? I'm always interested in discussing new opportunities, innovative ideas, or just connecting with fellow developers.
Get In Touch
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What I'm Looking For
Areas where I can make the most impact
Let's Discuss
Topics I'm always excited to talk about
Ready to Start a Conversation?
Whether you have a specific project in mind or just want to connect, I'd love to hear from you.
Ready to work together?
Let's discuss your next project and bring your ideas to life with modern web technologies.