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4.8

(39 reviews)

Sean Tech Solutions

@seandinwiddie

4.8

6.3

95%

End-to-End Software Development — Idea to Reality

$50 USD / Hour

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United States (1:19 PM)

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Joined on April 24, 2010

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3 Recommendations

$50 USD / Hour

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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

Windows 11 Expert for Settings Customization

What a joy to work with! Solved so many irritating problems on my laptop. Automated several processes so I don't have to worry about updating or downloading any more. Solved connectivity problems on my local WIFI and cell phone. Cleaned up/optimized my laptop as well. Got rid of annoying intrusions (like MS Edge). Asked for suggestions and implemented several thing I had not thought of. Next, I'm going to have him to similar work on my spouse's PC. Well worth the investment. [01 July, 2026] It was a pleasure working. He delivered high-quality work ahead of schedule and were very proactive in communication. He understood the requirements perfectly and needed very little revision. I highly recommend them and will definitely hire them again!

Patti

@PCHPatti

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July 2026

Verifications

On time

94%

On budget

100%

Accept rate

84%

Repeat hire rate

See all PHP Developers in United States

Portfolio

All

Website (15)

Mobile App (4)

AI/ML Projects (5)

Blockchain/Trading (3)

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

Trading bot

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

Boat Sales Website Development

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

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

Learning Management System

Trading bot

AI Image Recognition System

Boat Sales Website Development

AI Healthcare Diagnostics

Food Delivery Mobile App

4.8 · 39 Reviews

39 Reviews

Real-Time Fire/EMS Dispatch Monitor for macOS

Sean was great to work with! He completed everything on time, and anytime I had a question, he responded right away and was always helpful. The entire process was very easy, and communication was excellent. I would definitely recommend him and would be happy to work with him again.

Mobile App Development

+5 more

RM-COBOL Character Validation Procedure

Great freelancer, prompt understood the project well!

+3 more

Paid Messaging and Calling App

Creative guy and fun to work with

PHP

Mobile App Development

iPhone

Android

iOS Development

+3 more

Industrial Website Development & SEO Optimization

As a company specializing in the R&D and manufacturing of high-precision cutting tools, we maintain high standards regarding our official website's professionalism, user experience, and effectiveness in overseas marketing. The completed website exceeded our expectations; the design is clean and sophisticated, perfectly aligning with the industrial manufacturing sector. The product presentation is logically structured, and the site performs well in terms of responsiveness and attention to detail.

+3 more