Trevor de Koekkoek

Architected and developed a performance-critical enterprise mapping application for Kadaster, applying modern Angular optimization techniques and signal-based state management to deliver a fast, responsive user experience.

• Designed and implemented modular front-end architecture using Angular 20 with OnPush change detection throughout, minimizing unnecessary re-renders across the mapping interface
• Introduced NgRx SignalStore as the state management foundation, leveraging stored signal state to eliminate redundant network calls and ensure fine-grained, performant reactivity
• Built custom, reusable components leveraging Angular CDK and OpenLayers for complex mapping interactions
• Adopted zoneless Angular with Signals, removing Zone.js overhead and enabling fully declarative, high-performance rendering across the application
• Mentored development team on modern Angular patterns, SCSS architecture, and component-driven development

Technologies: Angular 20, NgRx SignalStore, Angular CDK, OpenLayers, GGC, SCSS, TypeScript

Designed and built a full-stack music venue discovery platform from concept to production, with a strong focus on front-end performance including SSR, lazy loading, Apollo caching, and bundle optimization.

• Architected complete Angular SSR application with lazy-loaded feature modules, route-level code splitting, and preload strategies to optimize initial load time and time-to-content
• Integrated Google Places API, Mapbox API, and Google Mapping API for venue discovery and geolocation
• Optimized GraphQL data layer using Apollo InMemoryCache and precise query field selection, reducing over-fetching and eliminating redundant network requests
• Integrated Claude API for AI-powered content generation and database automation
• Applied bundle optimization techniques and Angular SSR to improve page load performance and search engine visibility across venue and event pages

Technologies: Angular SSR, GraphQL, Apollo Client, Hasura, NHost, PostgreSQL, Claude API, Mapbox API, Google Maps API

Designed and developed a comprehensive software development management system with powerful project tracking capabilities.

• Architected central object model for complex project relationships and dependencies
• Built intuitive project explorer for managing scrum processes and sprint planning
• Implemented bug tracking and release planning tools for software lifecycle management

Technologies: Angular, NgRx, GraphQL, Developer Express

Provided technical leadership and architectural direction for a large-scale, multi-language enterprise application.

• Delivered technical direction and proof-of-concepts for complex features
• Architected application state infrastructure using NgRx standard store with selectors and effects, establishing team-wide patterns for predictable state management and efficient component rendering
• Designed and implemented custom PrimeNG SASS theme for brand consistency

Technologies: Angular, NgRx (standard store), PrimeNG, SASS, .NET, SQL Server, CosmosDB, Azure

Developed mission-critical administration applications for nuclear power plant operations and safety compliance.

• Built personnel management system for tracking roles, responsibilities, and certifications
• Implemented data monitoring dashboards for compliance tracking in safety-critical environments

Technologies: Angular, TypeScript, .NET Web API, C#, MS SQL, Breeze, PrimeNG, NgRx

Developed internal vendor portal and pioneered GraphQL API implementation.

• Architected and implemented GraphQL API using Apollo Server and NodeJS
• Designed TypeORM data layer for PostgreSQL integration

Technologies: Angular, GraphQL, Apollo Server, NodeJS, Express, TypeORM, .NET

Led front-end modernization initiative converting a legacy MVC application to a modern Angular SPA.

• Built player recruitment application with advanced filtering, ranking, and drag-and-drop functionality

Technologies: Angular, .NET Web API, TypeScript, Bootstrap

Architected association management application using Angular 2 and .NET Core.

Developed HR applications in AngularJS and REST.

Built travel and rewards platform with AngularJS and NodeJS.

Led web applications using AngularJS, Web API, and Entity Framework.