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. This is 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 (US 20120089612 A1)
Live data form viewing and updating system (US 20120089706 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.