a photograph of steven jenkins

Steven Jenkins

Full-Stack Engineer

Full-Stack Engineer specializing in revenue-critical systems and building performant, production-grade interfaces using Svelte 5 and SvelteKit. Architected and shipped complete web applications serving 800+ concurrent users with 99.9% uptime, optimizing front-ends to smoothly render 500+ real-time countdown timers with complex conditional queries against live data. Strong track record taking features from concept to production—designing in Figma, implementing responsive UIs with TypeScript, and deploying to production infrastructure. Technical expertise includes modern JavaScript/TypeScript development, performance optimization, component architecture, and building polished user experiences. Experience spans real-time data systems, financial applications with Stripe API integration, and scalable SaaS platforms generating revenue from day one.

Key Technical Achievements

Statistical Table Tennis demo

Statistical Table Tennis

Full-Stack SaaS Platform

2025

Architected and built complete production SaaS application from concept to paying customers in 3 months while managing multiple concurrent client engagements.

500+
Real-time Statistical Displays
3.5 months
Development Time To First Customer
99.9%
Self-hosted Infrastructure Uptime
Solo
Project Designer, Developer & IT Engineer
Svelte 5SvelteKitDrizzle ORMSQLiteLucia AuthNode.jsUbuntu ServerPM2NginxCloudflareStripe APIFigma
Real-Time GPS Platform demo

Real-Time GPS Platform

Scalable Event Infrastructure

2025

Architected real-time tracking platform utilizing GPS location and metadata, associating individual devices to information including team name, last update time, and dynamically calculated race position.

150+
GPS Devices Synced Real-time
800+
Concurrent Users on Raceday
1-week
Ground Up Redevelopment in 2025
$0.13
Infrastructure Cost
2,500+
Livestream Viewers
4 Years
Continued Client Engagement and Counting
Svelte 5SvelteKitFirebase (Firestore, Realtime DB)JavaScript/TypeScriptVercelOpenStreetMap API
Macro Exotics demo

Macro Exotics

Exotic Vehicle Rental Platform

2025

Full-stack ownership: Designed and implemented every layer including Firebase Authentication, Firestore database, RESTful API endpoints, front-end UI/UX with Svelte 5, and Stripe payment processing.

Svelte 5SvelteKitStripe APIFirebase (Auth, Firestore, Storage)TypeScriptREST APIsVercelGitGitHub
Wrench Totalcare Plus demo

Wrench Totalcare Plus

Complete System Architecture & iOS Application

2024

Full-stack ownership: Designed and implemented every layer including Firebase Authentication, Firestore database architecture, RESTful API endpoints, front-end UI/UX, and Stripe payment processing.

Svelte 5SvelteKitCapacitorStripe APIFirebase (Auth, Firestore, Storage)TypeScriptREST APIsVercelGitGitHub

Payment Processing & Subscription Platform

Financial Technology Infrastructure

2021

Architected subscription wellness platform generating $250,000 in revenue with Stripe API integration for subscription management, automated billing, and recurring payments.

$250,000
Revenue Generated
Stripe APIFirebase (Auth, Firestore, Functions)JavaScript/TypeScriptREST APIs

Enterprise Technology Infrastructure

Complete System Architecture

2017

Complete technical leadership for disaster consulting startup scaling to $6-9M revenue. Led all technology decisions from founding through 80+ employee scale.

$6-9M
Company Revenue
80+ employees
Team Size
Zero
Migration Downtime
Google Sheets APIGoogle Apps ScriptEnterprise Email MigrationWeb InfrastructureAutomated Systems

Experience

SGJX Holdings LLC

Founder & Technology Lead

Wellington, Florida | 2021 - Present

Lead technical architecture and engineering for client engagements across multiple industries

  • Manage complete product lifecycle from requirements through production deployment
  • Architect scalable web applications using modern JavaScript frameworks (Svelte 5, SvelteKit)
  • Make strategic technology decisions balancing scalability, cost, and time-to-market
  • Establish development processes and engineering best practices across client projects
  • Coordinate with stakeholders to align technical roadmaps with business objectives

JSX Software LLC

Founder & Technology Lead

Wellington, Florida | 2017 - 2024

Position held concurrently with CaptiveOne role

Led technical infrastructure development enabling client revenue scaling

  • Architected complete technology infrastructure supporting company scaling from founding to $6-9M annual revenue with 80+ employees
  • Designed and implemented subscription platform with Stripe API integration generating $250,000 in revenue, including payment reconciliation system calculating per-customer transfers based on invoice line items
  • Led enterprise migration of 80-100 user accounts across email platforms with zero data loss
  • Replaced legacy systems after previous engineering teams failed, delivering production-grade solutions
  • Managed complete technical operations including infrastructure planning, security, and stakeholder communication
  • Made strategic build vs. buy decisions for CRM, payment processing, and business automation systems

CaptiveOne Advisors™

Head of Revenue Operations | Senior Solutions Engineer

Wellington, Florida | Nov 2020 - 2023

Built and managed 3-person engineering team using Scrum methodology, delivering 35+ production systems

  • Led cross-functional collaboration with sales and executive leadership on technical strategy and roadmap planning
  • Architected custom CRM platform with integrated financial modeling, workflow automation, and API integrations
  • Established technical standards for team deliverables, code quality, and system reliability
  • Managed stakeholder communication, translating business requirements into technical specifications
  • Developed pricing engines that became production billing infrastructure processing $500k+ invoices
  • Performed full lifecycle team management including recruiting, mentoring, training, and performance evaluation
  • Introduced agile software processes and best-in-class engineering practices to the team
  • Managed technical debt to maintain development velocity while minimizing production incidents

CaptiveOne Advisors™

Solutions Engineer | Sales Operations Coordinator

Wellington, Florida | Nov 2017 - Nov 2020

Conducted technical discovery and requirements analysis with cross-functional stakeholders to architect solutions improving sales operations and pipeline efficiency

  • Designed and implemented custom CRM platform supporting complete sales lifecycle, defining data architecture, API integrations, automation workflows, and reporting capabilities
  • Defined data architecture, REST API integrations, and automation workflows for revenue operations
  • Built comprehensive financial modeling tools and sales enablement systems integrated into CRM, standardizing pipeline forecasting, revenue projections, and client deliverables
  • Partnered with CFO on technical solutions supporting financial analysis, mapping business processes with detailed cost breakdowns and identifying automation opportunities
  • Delivered technical training to business teams on advanced capabilities (Google Apps Script, financial automation), enabling self-service for complex data operations
  • Established development standards including pipeline management, testing procedures, deployment workflows, and cross-departmental handoff protocols

CaptiveOne Advisors™

Systems Administrator | Business Analyst

Wellington, Florida | Aug 2015 - Nov 2017

Mapped and documented key business processes with time estimates and cost breakdowns per step

  • Coordinated with CFO to incorporate actual labor costs and identify efficiency opportunities
  • Implemented company-wide file storage policies and standardized workflows, collaborating with each department to design systems tailored to individual team needs
  • Drove adoption across the organization through training and change management
  • Bridged technical operations with business objectives through data-driven analysis
  • Managed network security, infrastructure planning, and technology operations
  • Coordinated system implementations based on cost-benefit analysis

Technical Skills

Languages & Frameworks

  • JavaScript
  • TypeScript
  • Python
  • Svelte 5
  • SvelteKit
  • HTML5
  • CSS
  • Java
  • C
  • C#
  • SQL

Infrastructure & Cloud

  • Firebase (Firestore, Functions, Auth, Hosting, Realtime Database)
  • Vercel
  • Google Cloud Platform
  • Ubuntu Server
  • Nginx
  • PM2
  • Cloudflare

APIs & Integrations

  • REST API design
  • Stripe API
  • Google Apps Script
  • Payment processing
  • Third-party service integrations
  • OpenStreetMap API

Development Tools

  • Git
  • GitHub
  • CI/CD pipelines
  • Performance monitoring
  • Testing frameworks
  • Vite
  • Claude Code
  • Cursor
  • WindSurf
  • MCP Server
  • AI Agents

Databases

  • Firebase Firestore
  • Firebase Realtime Database
  • SQLite
  • Drizzle ORM
  • SQL

Methodologies

  • AI Assisted Workflows
  • Context Engineering
  • Iterative Design
  • SDLC management
  • Scrum/Agile
  • System architecture
  • Technical team leadership
  • Remote team coordination

Education

Bachelor of Computer Science

Minors in Business Administration & Mathematics

University of Miami

Miami, FL | Spring 2016

framed image of a university of miami diploma

Get In Touch

I'm always open to discussing new opportunities, interesting projects, or potential collaborations.