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Sean Tech Solutions

@seandinwiddie

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4.7
26

5.2

5.2

93%

End-to-End Software Development — Idea to Reality

$50 USD / Hour

・

Flag of

United States (11:52 AM)

・

Joined on April 24, 2010

$50 USD / Hour

・

Full Stack Architect/Engineer & Technical Consultant I'm Sean Paul Payne Dinwiddie, a seasoned full-stack engineer and technical consultant with over two decades of experience crafting scalable, high-performance applications. I specialize in building modern solutions that deliver measurable business value. I'm a battle-tested developer crafting high-performance digital solutions. Think of me as your technical force multiplier - I don't just write code, I architect scalable systems that stand the test of time and deliver ongoing value to your business. Core Expertise: • Web and software architecture and implementation • Application development with strict typing principles • Full-stack development with modern frameworks • Performance optimization and scalability solutions • User-centric interface design and development • Technical consulting and business value optimization

I have a twitch and yt DabbedOutDream and I wanted a mod around my brand and eventually be the center focus for a custom modpack alongside some of my other favorites like Create, AE2, Fisk's Superheros, and others. I'd like a custom weed crop made(hopeful

super helpful delivered project early and really work with me

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Sean K.

@DabbedOutDream

・

May 2026

Verifications

On time

78%

On budget

100%

Accept rate

83%

Repeat hire rate

8%

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Portfolio

Portfolio

All
Website (15)
Mobile App (4)
AI/ML Projects (5)
Blockchain/Trading (3)
13926220
Description A comprehensive LMS with video courses, interactive quizzes, progress tracking, certification management, and AI-powered learning path recommendations. Solving Method Built an adaptive learning engine that adjusts course difficulty based on student performance. Implemented video streaming with DRM protection. Created an analytics dashboard for instructors with engagement metrics. Achievement Served 50,000+ students across 200+ courses. 85% course completion rate vs. industry average of 15%. Period Jun 2023 — Sep 2023 Collaboration Worked with educational content creators and a learning experience designer.

Learning Management System

13926255
Description A real-time cryptocurrency trading platform with advanced charting, automated trading bots, portfolio analytics, and multi-exchange integration. Solving Method Integrated WebSocket feeds from multiple exchanges for real-time price data. Built custom technical analysis indicators and charting with D3.js. Implemented automated trading strategies with backtesting capabilities. Achievement Handled $5M+ in daily trading volume. 99.99% uptime with sub-100ms order execution. Period Oct 2024 — Jan 2025 Collaboration Co-developed with a quantitative analyst and a blockchain specialist.

Trading bot

13926234
Description A computer vision platform for automated image classification, object detection, and visual quality inspection used in manufacturing and retail industries. Solving Method Fine-tuned YOLOv8 and ResNet models on custom datasets. Built a real-time inference pipeline with GPU acceleration. Implemented active learning for continuous model improvement with user feedback. Achievement Achieved 97.5% detection accuracy. Reduced manual inspection time by 80% for 15+ manufacturing clients. Period Aug 2024 — Nov 2024 Collaboration Worked with 2 ML engineers and quality assurance specialists from manufacturing partners.

AI Image Recognition System

13926188
Developed a modern boat sales and marine marketplace platform designed to streamline the buying and selling experience for boats, yachts, and marine equipment. The platform included: Advanced boat listing management with detailed specifications, galleries, pricing, location, and seller profiles. Powerful search and filtering features by boat type, brand, size, condition, price range, and location. Responsive frontend optimized for desktop, tablet, and mobile users to ensure a seamless browsing experience. Secure user authentication and role-based dashboards for buyers, sellers, and administrators. Inquiry and lead management system allowing buyers to contact sellers directly through the platform. Interactive media integration including high-resolution image galleries and featured listings. Admin panel for managing listings, approvals, users, featured advertisements, and content moderation. SEO-friendly architecture and optimized performance to improve visibility and user engagement.

Boat Sales Website Development

13926271
Description An AI-powered medical diagnostics platform with medical image analysis, patient risk prediction, clinical decision support, and EHR integration. Solving Method Fine-tuned convolutional neural networks on medical imaging datasets for pathology detection. Implemented DICOM image processing pipeline. Built a clinical decision support system integrating patient history with diagnostic predictions. Achievement Achieved 95% diagnostic accuracy on radiology images. Used by 30+ clinics, reducing diagnostic turnaround by 60%. Period Mar 2019 — Aug 2019 Collaboration Worked with radiologists, clinical researchers, and healthcare IT specialists.

AI Healthcare Diagnostics

13926227
Description A feature-rich food delivery app with real-time order tracking, restaurant management portal, driver assignment algorithm, and in-app payments. Solving Method Built with Flutter for cross-platform mobile experience. Designed an intelligent order routing algorithm considering driver proximity, restaurant prep time, and traffic conditions. Implemented real-time GPS tracking with Google Maps. Achievement Processed 25,000+ orders in first quarter. Average delivery time of 28 minutes with 4.8-star user rating. Period Jun 2023 — Oct 2023 Collaboration Worked with 2 mobile developers, a logistics expert, and restaurant partners.

Food Delivery Mobile App

13926220
Description A comprehensive LMS with video courses, interactive quizzes, progress tracking, certification management, and AI-powered learning path recommendations. Solving Method Built an adaptive learning engine that adjusts course difficulty based on student performance. Implemented video streaming with DRM protection. Created an analytics dashboard for instructors with engagement metrics. Achievement Served 50,000+ students across 200+ courses. 85% course completion rate vs. industry average of 15%. Period Jun 2023 — Sep 2023 Collaboration Worked with educational content creators and a learning experience designer.

Learning Management System

13926255
Description A real-time cryptocurrency trading platform with advanced charting, automated trading bots, portfolio analytics, and multi-exchange integration. Solving Method Integrated WebSocket feeds from multiple exchanges for real-time price data. Built custom technical analysis indicators and charting with D3.js. Implemented automated trading strategies with backtesting capabilities. Achievement Handled $5M+ in daily trading volume. 99.99% uptime with sub-100ms order execution. Period Oct 2024 — Jan 2025 Collaboration Co-developed with a quantitative analyst and a blockchain specialist.

Trading bot

13926234
Description A computer vision platform for automated image classification, object detection, and visual quality inspection used in manufacturing and retail industries. Solving Method Fine-tuned YOLOv8 and ResNet models on custom datasets. Built a real-time inference pipeline with GPU acceleration. Implemented active learning for continuous model improvement with user feedback. Achievement Achieved 97.5% detection accuracy. Reduced manual inspection time by 80% for 15+ manufacturing clients. Period Aug 2024 — Nov 2024 Collaboration Worked with 2 ML engineers and quality assurance specialists from manufacturing partners.

AI Image Recognition System

13926188
Developed a modern boat sales and marine marketplace platform designed to streamline the buying and selling experience for boats, yachts, and marine equipment. The platform included: Advanced boat listing management with detailed specifications, galleries, pricing, location, and seller profiles. Powerful search and filtering features by boat type, brand, size, condition, price range, and location. Responsive frontend optimized for desktop, tablet, and mobile users to ensure a seamless browsing experience. Secure user authentication and role-based dashboards for buyers, sellers, and administrators. Inquiry and lead management system allowing buyers to contact sellers directly through the platform. Interactive media integration including high-resolution image galleries and featured listings. Admin panel for managing listings, approvals, users, featured advertisements, and content moderation. SEO-friendly architecture and optimized performance to improve visibility and user engagement.

Boat Sales Website Development

13926271
Description An AI-powered medical diagnostics platform with medical image analysis, patient risk prediction, clinical decision support, and EHR integration. Solving Method Fine-tuned convolutional neural networks on medical imaging datasets for pathology detection. Implemented DICOM image processing pipeline. Built a clinical decision support system integrating patient history with diagnostic predictions. Achievement Achieved 95% diagnostic accuracy on radiology images. Used by 30+ clinics, reducing diagnostic turnaround by 60%. Period Mar 2019 — Aug 2019 Collaboration Worked with radiologists, clinical researchers, and healthcare IT specialists.

AI Healthcare Diagnostics

13926227
Description A feature-rich food delivery app with real-time order tracking, restaurant management portal, driver assignment algorithm, and in-app payments. Solving Method Built with Flutter for cross-platform mobile experience. Designed an intelligent order routing algorithm considering driver proximity, restaurant prep time, and traffic conditions. Implemented real-time GPS tracking with Google Maps. Achievement Processed 25,000+ orders in first quarter. Average delivery time of 28 minutes with 4.8-star user rating. Period Jun 2023 — Oct 2023 Collaboration Worked with 2 mobile developers, a logistics expert, and restaurant partners.

Food Delivery Mobile App

4.7 · 26 Reviews
26 Reviews
D
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Sean K.

5.0

$500 USD

19 days ago

I have a twitch and yt DabbedOutDream and I wanted a mod around my brand and eventually be the center focus for a custom modpack alongside some of my other favorites like Create, AE2, Fisk's Superheros, and others. I'd like a custom weed crop made(hopeful

super helpful delivered project early and really work with me

Java
Game Design
Game Development
Scripting
Minecraft

+2 more

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Travis K.

4.6

$250 USD

26 days ago

WordPress Boat Brokerage API Site

Very pleased with Sean's professionalism and desire to get the task to the finish line.

PHP
Website Design
WordPress
HTML
Web Development

+5 more

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Andreas E.

5.0

€200 EUR

1 month ago

AI Event Bib Detection Upgrade

Good job, all done as expected. in time.

Python
Matlab and Mathematica
Machine Learning (ML)
C++ Programming
Arduino

+3 more

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M

Former Client (inactive)

5.0

$162.30 USD

2 months ago

Advanced Excel Data Cleaning and Organization (archived)

All work was good. He is expert.

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Shikha K.

5.0

$30 USD

3 months ago

Urgent Shopify Bug Fixes (Native English preferred)

Sean was incredibly helpful throughout the process. He remained calm, quickly diagnosed the problem, and resolved it much faster than I expected. Thanks to his quick action, I was able to avoid a bigger issue. He’s clearly very talented—thank you, Sean!

PHP
JavaScript
CSS
Website Testing
HTML

+5 more

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Experience

Web & Software Development

Dec, 2018 - Present

•

7 years, 5 months

Sean Dinwiddie

Dec, 2018 - Present

•

7 years, 5 months

Web and software development.

Dec, 2018 - Present

•

7 years, 5 months

Web Design

Jun, 2016 - Aug, 2017

•

1 year, 2 months

Optimize Worldwide

Jun, 2016 - Aug, 2017

•

1 year, 2 months

Web design, development, and SEO.

Jun, 2016 - Aug, 2017

•

1 year, 2 months

Web & Mobile Development

Jul, 2011 - Oct, 2014

•

3 years, 3 months

Veritas Heath Systems

Jul, 2011 - Oct, 2014

•

3 years, 3 months

Develop websites, web apps and mobile apps. Taught CG and programming classes for teenagers. Repair computers.

Jul, 2011 - Oct, 2014

•

3 years, 3 months

Certifications

P

Preferred Freelancer Program SLA

Freelancer logo US (International) / English
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