Middleton, MA
Sean
Langford
Cyclist. Builder. Bass player. Dog dad to Bingus & Monk. Co-founder and CTO who ships production AI systems and occasionally survives mountain passes in Spain.
The Person
About Me
Cycling is how I think.
Road, mountain, and cyclocross racing for most of my adult life. I co-founded Strong Like Bull — an annual 2-week professional-style bicycle and triathlon training camp in the mountains of Spain, modeled after European pro team spring camps. Daily yoga, 3–6 hour mountain rides with a follow car, a masseuse, nutritionist, two coaches, and a bike mechanic on staff.
Sustained effort, incremental gains, knowing when to attack — that's not just a racing philosophy.
Follow on Strava
Photo coming soon
Music
Bass, guitar, and drums. Focused on math rock, post-punk, and experimental music — the kind where the time signatures are a suggestion and the structures fall apart in interesting ways. Playing music and building software scratch the same itch: pattern, tension, release.
Bingus & Monk
Two dogs. Bingus and Monk. They have strong opinions about walk schedules and zero interest in distributed systems. Important grounding forces.
Engineering Focus
What I Build
Fifteen years as a hands-on CTO and co-founder, with multiple exits in B2B SaaS and consumer platforms. My current focus is production agentic AI — the hard engineering work of making LLMs reliable, auditable, and actually useful.
Agentic AI
Production multi-tenant MCP servers with dynamic tool discovery, per-tenant policy enforcement, planner/executor orchestration, persistent memory, and full audit trails.
RAG & Knowledge Systems
Retrieval-augmented generation pipelines over enterprise knowledge bases, with structured eval frameworks, guardrails, and model lifecycle management.
Cloud Infrastructure
AWS EKS, GCP GKE, Kubernetes, Postgres, Kafka, Redis — full-stack cloud-native architecture from greenfield to SOC2-certified production.
Career
Highlights
SlapFive
Co-Founder & CTO
2016 – Present
- →Designed and shipped a production multi-tenant MCP server
- →Built RAG pipelines with eval frameworks and guardrails
- →Led SOC2 Type II certification from scratch
- →2026 MTLC finalist — Boston's Best Marketing Startup
Volo Sports
Tech Director
2022 – 2025
- →Platform scaled to support 3x company revenue growth
- →4x performance improvement; 99.99% uptime
- →Integrated Google Vertex Generative AI into production
- →Heroku → Kubernetes (AWS EKS) migration
Marco Rubber and Plastics
Hands-on Investor & Tech Lead
2018 – 2022
- →Built attribute-driven e-commerce platform; +30% revenue
- →Large-scale ETL pipeline via Amazon Glue + Apache Spark
- →AI content generator driving thousands of SEO pages
Gemr / Collect.it
Co-Founder & CTO
2014 – 2018
- →100k users in 12 months; order-of-magnitude valuation gain
- →Collect.it: solo build from concept to MVP in 36 weeks, sold to Gemr
- →Filed 5 patent applications
Nolij → Perceptive Software (Lexmark)
CTO
2008 – 2014
- →5th employee; grew company from ~$5M to $32M exit
- →5 patent-pending innovations
IP & Research
Patents & Publications
Browser-based method and system for scanning documents — US WO2012050947A1
Mobile file uploader — US US20120089706 A1
High performance cross-platform document viewing — US 20120089901 A1
Flexible fully integrated real-time document indexing — US20120089612 A1
Live data form viewing and updating system — US20120089706 A1
Publication: A. K. Uht, S. Langford and D. Morano. "Interactive High-Performance Processor Understanding via the Web." SSGRRw'2002 International Conference, L'Aquila, Italy.
Side Projects
Notable Experiments
pg62 — Crypto Volatility Bot
An early applied ML project: a cryptocurrency volatility trading bot using machine learning and cloud-scale data mining to identify and trade on market movement signals. Built before “AI trading” was a buzzword.
Evil Racing Cult
Co-founded a carbon racing products brand with an edge. Because not every side project has to involve a cloud provider.
Get in Touch
Let's Talk
Building something ambitious in AI infrastructure, agentic systems, or B2B SaaS? I'd love to hear from you.