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Zakk D

@z4kkd_

Software Engineer, React, Blazor, NET, Python, PostgreSQL, APIs, AI

United States
English
About me
I'm a full-stack software engineer with experience building production web applications independently. I work across the entire stack, React frontends, REST APIs, PostgreSQL databases, and Docker deployments, and I own every part of the project myself rather than farming pieces out. My stack: C#, ASP.NET Core, React, FastAPI, Python, PostgreSQL, TypeScript, Node.js, Docker. I've shipped data dashboards, AI-powered platforms, multi-user apps with authentication, and developer tooling. I respond fast, communicate clearly, and don't disappear mid-project.... Read more

Skills

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z4kkd_
Zakk D
Offline • 
Average response time: 10 hours

See my services

Bug Fixes
I will fix bugs and clean up the application
From$75 / projectMore details
Programming & Tech
I will design your database schema or fix your slow queries
From$75 / projectMore details

Portfolio

Work experience

Self_Employed

Self Employed

Freelance • 7 yrs 5 mos

Full Stack Developer

Apr 2020 - Present • 6 yrs 4 mos

Design and ship full-stack web applications for clients using React, ASP.NET Core, and FastAPI, taking ownership of system design and database schema through API implementation, frontend build, and production deployment. Built interactive data dashboards with React, D3.js, and PostgreSQL, giving clients filterable, real-time views of their business data and replacing manual reporting with purpose-built tooling. Designed and implemented REST APIs with JWT authentication and role-based access control across several multi-user applications, with clean separation between API, business logic, and data layers. Tracked down and fixed performance issues in production systems by profiling slow queries, adding missing indexes, and cleaning up memory usage, resulting in noticeably faster response times. Built and shipped browser-based and cross-platform games using Unity, Unreal Engine, Phaser, and Godot, covering gameplay systems, UI, and taking projects from prototype to public release.

Software Engineer

Feb 2024 - Mar 2025 • 1 yr 1 mo

Ameritech Data Solutions Developed and maintained C#/.NET Core applications used daily by client companies, delivering feature improvements, bug fixes, and performance work to live systems under real user load. Refactored legacy WinForms and backend code into a cleaner, more modular structure, making it easier for the team to build on and reducing the risk of changes breaking unrelated parts of the system. Improved SQL Server query performance by identifying missing indexes and rewriting slow joins, which had a noticeable impact on responsiveness in the workflows clients used most.