Jack Ivanisevic

Senior Solutions Architect

Talent

LondonMember since April 14, 2026

Custom WordPress theme and plugin developmentAdvanced Custom Fields (ACF) implementationWooCommerce customization and integrationWordPress API integrations and dynamic content systemsPHP application developmentREST API design & integrationBackend workflows and automationDebugging and performance optimizationJavaScriptHTMLCSSResponsive UI implementationFigma/design-to-code implementationMySQLPostgreSQLRelational data modeling and query optimizationGit / GitHubLinux development environmentsAPI testing toolsAI-assisted development (Claude Code, Copilot)

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About

Full stack web developer with 12+ years of experience building custom web applications and WordPress-based systems. Strong foundation in PHP, APIs, and database-driven architecture, with a focus on reliability, maintainability, and practical problem solving. Experienced in building custom WordPress implementations using Advanced Custom Fields (ACF), custom themes, and backend integrations to support complex, data-driven websites and business workflows.

Experience

Web Application Developer at Independent / Contract (2010-01 – Present)

Design and develop web applications, WordPress systems, and backend integrations supporting business platforms and operational workflows.

Built and customized WordPress sites using ACF, custom themes, and backend integrations
Developed PHP-based web applications and APIs
Designed and optimized database-driven systems using MySQL and PostgreSQL
Implemented integrations connecting multiple services and external APIs
Translated designs into responsive, functional interfaces with clean HTML/CSS/JS
Diagnosed and resolved complex production issues, improving performance and reliability
Implemented backend workflows supporting automation and data synchronization
Leveraged AI-assisted tools to accelerate development and debugging workflows

Systems & Performance Engineer at Independent / Contract (2016-01 – Present)

Develop systems and tools supporting operational workflows and data visibility.

Built database-driven tools integrating multiple data sources
Improved system reliability through structured debugging and process refinement
Developed reporting tools and automation workflows supporting internal operations

Digital Systems Support at Premergency Inc. (2009-01 – 2022-12)

Maintained and improved web-based systems with a focus on reliability, consistency, and structured processes.