Full Stack Engineer
Hi, I'm Cassius Reynolds
Full Stack Engineer who builds and scales production systems from the ground up. I lead teams, own projects end-to-end, and deliver reliable, high-impact solutions across modern web architectures.
Featured Projects
Lineup Legends
Lineup Legends is a full-stack fantasy basketball platform where users build their dream lineup under a $15 salary cap. Create lineups, rate and compete against others, and engage with a passionate community of basketball fans. Salary-cap lineup builder with positional constraints, drag-and-drop ordering, and a gamble system featuring animations, sound effects, and confetti Multi-factor authentication supporting TOTP, email codes, and WebAuthn passkeys with encrypted secrets and Redis-backed session verification Social layer including follows, threaded comments, upvote/downvote voting, Giphy GIF embeds, bookmarks, and automated profanity filtering Cache-Aside strategy with Redis to cache high-traffic public data, reducing database load and improving page load times File uploads to S3 with CloudFront CDN delivery, MIME-type validation, and integrated YouTube Data API for curated video content Admin dashboard with user management, ban/suspend enforcement, flagged content review, and player request queue with community value voting Guest login USERNAME: guest EMAIL: llguest@gmail.com PASSWORD: 123 For the best experience, sign in with Google.
LibrisList
A modern web application that simplifies how users discover, manage, and engage with their reading material. Built with Next.js 15 and the App Router for optimized rendering and streamlined routing. Google Books API integration with advanced search filters and detailed book information Auth.js implementation for secure Google Sign-In with personalized user experiences Supabase (PostgreSQL) backend for storing curated reading lists, notes, and user preferences Responsive design with Tailwind CSS for a clean, modern interface across all devices Full-stack architecture demonstrating RESTful API integration and robust authentication practices
Memory Squares
A memory game inspired by Nickelodeon's Brain Surge where players replicate a sequence of flashing squares generated by the CPU. Difficulty scales with each level through increased grid size and speed. CPU-generated sequences stored in arrays, compared against player input on submission Progressive difficulty with expanding grid size and shorter display windows Timer-based challenge mode for added pressure High scores persisted in local storage with automatic leaderboard updates Audio-visual feedback for correct and incorrect answers
Sommelier Circle
A full-stack MERN application designed to foster a vibrant online wine community. Users can create and manage blog posts, connect with other wine enthusiasts, and explore an extensive wine encyclopedia. Rich text blog editor powered by Quill for creating and managing community posts Inverted index with fuzzy search for an enhanced experience when exploring wines, critics, and wine-related events Google Places API integration for tailored wine location suggestions and nearby venue discovery Autocomplete feature for fast and efficient venue search Follow system, community interactions, and participation in wine-related events All content, including images and descriptions, is for demonstration purposes only.
Curate Sphere
A PERN stack (PostgreSQL, Express, React, Node.js) application that leverages the Harvard Art Museums API, allowing users to create and manage their own art exhibitions from curated artworks. Complex search filtering across the Harvard Art Museums catalog Advanced state management for exhibition curation workflows Custom caching system integration to reduce API calls and improve performance Customizable user profiles with personal exhibition galleries End-to-end testing and robust error handling throughout the application
Athlete 2 Athlete
A full-stack platform connecting athletes, coaches, and the community through athlete spotlights, testimonials, and admin-controlled user submissions. Athlete spotlights with background, achievements, community impact, and up to three images stored on AWS S3 Testimonial submission system with admin approval workflow before publication Admin dashboard with submission management, status controls, profile editing, and email notifications via Nodemailer Redis caching to optimize API performance and reduce database load Built with React, Tailwind CSS, Node.js, Express, PostgreSQL, Redis, and AWS S3 No guest login available — please view the demo video to see admin features.
About Me
Full Stack Engineer at SyncSmart with deep expertise in React, Next.js, TypeScript, Node.js, tRPC, and AWS, and building type-safe APIs. I also work extensively with PostgreSQL, MongoDB, Redis, Docker, Stripe, GitHub Actions, and system design. I lead development of production applications, own features end-to-end, and architect solutions that scale.
Since 2023, I've shipped real-world freelance projects, graduated from General Assembly's Software Engineering Immersive, and earned AWS Cloud Practitioner, AWS AI Practitioner, and Professional Scrum Master I certifications. I was promoted within three months at SyncSmart to lead frontend development and drive system design decisions across the organization.
I hold a BA in Communication Management (Cum Laude) from Azusa Pacific University and am currently pursuing a BS in Computer Science with a concentration in Software Engineering at SNHU, maintaining a 3.85 GPA and earning Honor Roll every term.
Beyond engineering, I bring leadership shaped by 13 years of competitive football, youth mentoring at Rosie the Riveter Trust — Richmond, and active community involvement. I'm driven to build efficient, scalable systems and to master engineering fundamentals that complement modern tooling.
Skills & Technologies
Recommendations
What colleagues and collaborators have to say about working with me
I hired Cassius at SyncSmart, drawn by his unique background leading to software engineering and confident, relatable personality. We brought him in hoping for a quick learner and adaptable talent. He far surpassed that. Within 60 days he was delivering client-facing apps, and within 90 he was leading UI development for our team. Cassius has a keen eye for detail and a natural instinct for anticipating user needs, and he's just as fast to act on them. He sees the whole picture - building features while staying communicative, collaborative, and open to feedback. I see him as a high-impact individual contributor today with a clear pathway into leadership. I would not hesitate to recommend Cassius as a coworker, contributor and person.
I had the pleasure of working with Cassius during our time at SyncSmart. His work is consistently top-notch, and he brings a high level of expertise to every project. Cassius is a dedicated professional who would be a fantastic asset to any team.
Cassius is a standout React/Node/Next.js developer who brought real impact to our team. He’s not only technically sharp, but also an incredibly hard worker and an excellent communicator. Add to that a genuinely friendly and positive personality, and you’ve got someone any team would be lucky to have. Highly recommend!
As a first-time professional, Cassius demonstrated a solid foundation in full stack development and a genuine eagerness to learn and grow. He was dependable, collaborative, and took feedback constructively. He was highly engaged and personally invested in project outcomes. Cassius worked effectively alongside engineers far more senior than him without slowing down the rest of the team. Cassius' ability to translate business requirements and customer experience goals to tangible outcomes is a rare find. I could trust him with business context, I collaborated with him on product direction, and he followed through after our conversations with production-ready features.
Daniel Lynton
CEO
More Projects
A collection of projects showcasing my skills in full-stack development, from web applications to APIs and more.
Internal War
A custom headless eCommerce storefront built for a streetwear brand using Shopify Hydrogen Remix. Delivers a high-performance shopping experience with a fully customized brand aesthetic. GraphQL-powered data fetching for efficient store data management Shopify Admin configuration for collections, products, and navigation Fully customized storefront aligned with brand identity and design requirements High-performance architecture optimized for fast page loads and smooth checkout Near production — awaiting final content and design approval from the client.
Place of Grace Inc
A production website built for a care home facility serving developmentally disabled adults in Northern California. Provides essential information for families, potential staff, and the community. About pages, staff directory, mission page, careers page, and contact forms Forms routed to specific staff members via the Microsoft Graph API OAuth-based authentication for secure API communication Hands-on experience with DNS configuration, SEO optimization, and cloud infrastructure