Full-Stack Software Engineer & Mathematician

Systems & API Engineering

Sapphire Haeward

About Me

Mathematician and full-stack software engineer with experience building production-ready mobile and web applications from the ground up. Specialized in designing scalable, API-driven systems across frontend, backend, and cloud infrastructure, including authentication, real-time communication, payments, and AI-powered moderation. Founder of a software development company delivering cross-platform applications and end-to-end systems.

Education

Bachelor of Science in Mathematics
University of The Bahamas

Professional Experience

Founder & Lead Software Engineer

ShinyTech Consultants LLC
Dec 2024 – Present

• Founded and operate a software development company focused on building production-ready mobile and web applications.

• Architected and deployed cross-platform systems supporting iOS, Android, and web from a unified codebase.

• Engineered real-time backend systems enabling low-latency messaging and live updates.

• Developed secure payment and subscription pipelines using Stripe and RevenueCat.

• Implemented AI-powered moderation systems using OpenAI and Sightengine APIs.

• Built scalable backend infrastructure using Supabase (PostgreSQL, RLS, Edge Functions).

Data & Reporting Analyst

Britannia Securities Limited
Mar 2023 – May 2024

• Designed automated reporting workflows using R and Excel, reducing manual processes.

• Improved report delivery speed by ~200% through parallel processing.

• Collected, cleaned, and analyzed large financial datasets.

• Built structured reporting models to track performance and operational efficiency.

• Applied statistical analysis to support financial decision-making.

Technical Skills

Programming: JavaScript, TypeScript, Python, SQL, R, MQL5, C++, Java
Web & Mobile: React Native, Expo, Next.js
Backend & APIs: REST APIs, PostgreSQL, Serverless Functions, Webhooks
Cloud & Platforms: Supabase, Vercel
Integrations: Stripe, RevenueCat, OpenAI API, Sightengine, Expo Notifications, OAuth2

Selected Products

Allure Dating App

• Developed full-stack mobile and web application with real-time chat, push notifications, and moderation systems.

• Implemented scalable backend architecture and real-time messaging infrastructure.

• Deployed cross-platform clients using React Native and Next.js.

Selfee Marketplace App

• Built mobile marketplace platform enabling user-generated content and monetization.

• Designed backend systems with authentication, subscriptions, and moderation pipelines.

• Integrated RevenueCat subscription infrastructure.

Additional Projects

Real-Time Video & Voice Calling System (WebRTC)

2026

• Built peer-to-peer video and voice communication system using WebRTC APIs.

• Implemented real-time signaling infrastructure and connection lifecycle management.

• Engineered secure, production-ready demo supporting cross-device communication.

• Resolved networking challenges including ICE negotiation and NAT traversal.

AI Carousel Generator (Next.js Web Application)

2026

• Built a web-based tool that generates styled social media carousel posts from user input.

• Designed dynamic UI system allowing customizable themes, fonts, and layout previews.

• Implemented real-time content rendering and export functionality for rapid content creation.

• Engineered reusable component architecture for scalable design generation.

• Focused on performance and usability for creators and small businesses.

Languages

English (Fluent) | Spanish (Conversational) | Japanese (Conversational)