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Full-Stack Developer with experience building websites, APIs, software, SaaS, and games. Skilled in both frontend and backend development, with a focus on performance and clean, maintainable code. Proven track record of shipping features, solving problems, and delivering value quickly.…

Zachary Duncan

Full Stack Developer, Web Developer, Back-End Developer, +2

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Full-Stack Developer with experience building websites, APIs, software, SaaS, and games. Skilled in both frontend and backend development, with a focus on performance and clean, maintainable code. Proven track record of shipping features, solving problems, and delivering value quickly.…

Available to hire

Full-Stack Developer with experience building websites, APIs, software, SaaS, and games. Skilled in both frontend and backend development, with a focus on performance and clean, maintainable code. Proven track record of shipping features, solving problems, and delivering value quickly.

Skills

Experience Level

Expert

Expert

Expert

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Expert

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Expert

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Expert

Intermediate

Work Experience

Full-Stack Developer at Freelance

April 1, 2020 - Present

Developed and maintained multiple full-stack web applications with React, ASP.NET Core, and FastAPI, delivering solutions based on client needs. Engineered dynamic dashboards, interactive data visualizations, and custom tools using D3.js, TailwindCSS, and PostgreSQL/SQLite, helping clients analyse their data. Boosted performance and responsiveness by ~40% using profiling, object pooling, and memory optimization, while managing frontend and backend development across the full lifecycle. Created cross-platform game systems in Unity, Unreal, Phaser, and Godot (C#/C++/JavaScript).

Software Engineer at Ameritech Data Solutions

February 1, 2024 - March 1, 2025

Designed and maintained C#/.NET Core tools used daily by 100+ users, improving efficiency, productivity, and performance. Modernized legacy codebases to be cleaner, more modular, and easier to maintain while adding new tools and features for business needs. Resolved client tickets and fixed high-priority issues, collaborating with managers and the engineering team to deliver reliable solutions on time. Optimized SQL Server and LINQ queries while developing a tool to archive unused database records, cutting load times by 20% and improving maintenance.