Lawrence Baker

OTTO Sport AI grew out of Demosphere and is building an AI-driven operating system for youth sports. I joined as a senior engineer and moved into a staff role, working on the systems behind that shift.

• Build client-facing and internal agentic systems that support youth sports operations.
• Lead the move from a traditional development lifecycle (SDLC) to an AI-driven one (AIDLC), with spec-driven development (SDD) at its center so intent stays explicit and well-scoped work can be handed to agents.
• Define the patterns other engineers build on as AI becomes a dependable part of delivery.
• Work closely with cross-functional teams to understand how they actually work before automating any of it.

• TypeScript
• NestJS
• React
• Node.js
• OpenAI
• PostgreSQL
• AWS

Led the engineering department building registration and program management software for youth sports, covering payments, scheduling, and background screening.

• Led a department of nine engineers and coordinated offshore teams in India and Ukraine to scale delivery capacity.
• Rebuilt the mobile app serving 500,000+ users in three months, cutting API response times and payload sizes by 90% and lifting app store ratings from 2.5 to over 4.
• Shipped embeddable public schedules for hundreds of organizations, serving millions of pageviews a day at peak, using event-driven architecture, materialized views, and HTML over the wire.
• Shortened the deployment cycle from once every few days to several times a day by introducing incremental delivery, API design playbooks, and modularity standards that became company SOPs.
• Cut new-engineer onboarding from a week to a few hours with Docker Compose, AWS EC2 workspaces, and a shared internal knowledge base.

• Ruby on Rails
• NestJS
• React Native
• GraphQL
• PostgreSQL
• AWS
• Docker

Individual contributor leading key architectural decisions and vetting third-party integrations for the Untappd for Business menu platform.

• Led the consolidation of food, beer, wine, and cocktail menus, using polymorphic relationships to hold very different menu data in one model.
• Built a feature-flagging system to roll out changes gradually by client, user, and percentage threshold.
• Assessed wine-search vendors for integration into the menu-building products.

• Ruby on Rails
• PostgreSQL

Led several configurable products across the platform, from referee management to compliance automation and team scheduling.

• Built Officials Management for referee assignment and payouts driven by league rules and referee preferences, using GraphQL with Apollo Federation, React, MongoDB, Redis, and AWS Lambda.
• Built Roster Pro Club to automate data transfer from clubs to state and league governing bodies, checking each roster against configurable compliance rules.
• Built TeamNet, a web and mobile team management platform with scheduling and messaging, on Ruby on Rails, Node.js, and Apache Cordova.

• GraphQL
• Apollo Federation
• React
• MongoDB
• Redis
• AWS Lambda
• Node.js

Full-stack engineer on a Ruby and Rails platform for club, travel, and professional sports registration, working test-first with a continuous delivery pipeline.

• Built a PCI-compliant registration system processing 5+ million registrations a year at a 90% payment completion rate, using tokenization to keep card data off our systems and supporting card and ACH in full or installments.
• Integrated third-party risk providers to automate 100,000+ background checks a year with 500,000+ status callbacks, removing the need to store sensitive personal data.

• Ruby on Rails
• Sinatra
• RSpec
• Docker
• PostgreSQL

LAMP-stack development supporting the admissions office.

• Deployed the college's first online undergraduate admissions application, replacing a paper process with digital application management.
• Built a scheduling application for prospective students and parents to book personalized campus visits.

• PHP
• MySQL
• jQuery