Clean/Fast Wp Build, (Generateblocks) with sortable portfolio: (Storyboards & Mockups ready to go)

I am looking for an experienced WordPress front-end developer to build a modern, high-end, scroll-friendly, responsive website for my industrial design
consultancy.

I have already completed the creative direction, layout storyboards, copy, and UI wireframes (attached). Your role is purely technical execution. I prefer to avoid heavy, multi-purpose agency themes (like Avada or Divi. Etc). I'd like to see a lightweight, bloat-free build using GeneratePress + GenerateBlocks Pro (this must be engineered for elite Core Web Vitals and minimal DOM size.)

---The Scope of Work (Phased Delivery):

Foundation & Header: Implement a dark-mode design system (colors, typography) based on my mockups. Build a sticky top navigation bar featuring a smooth, sliding active-indicator (magic line/box) that glides seamlessly between menu items as the user scrolls down the page.

Homepage (Single-Page Scroll): Code a continuous scrolling layout featuring a fading hero section, an alternating vertical I.D.E.A.S. Process timeline (Ideate, Develop, Engineer, Assemble, Support), a bio block, and a streamlined 4-field contact form with a PDF download link.

Dynamic Portfolio & Template: Build a filterable portfolio gallery using a Custom Post Type (CPT), allowing projects to be instantly sorted by the 5 I.D.E.A.S. Stages without reloading the page. Create a single-project page template and migrate 5 existing projects into it as a baseline (I will migrate the rest of my archive later). Note: Some portfolio items will include video animations. These must be implemented for elite performance (e.g., Using lightweight preview images that load the video only upon click).

Migration, SEO & Launch: Map 301 redirects for a handful of legacy URLs to preserve my existing search equity. Cleanly strip out legacy WooCommerce bloat and unused database tables from the current site environment (or execute the build on a completely fresh WP install). Perform a speed/caching pass, configure Google Analytics 4, and launch from staging to live.

---What I Provide:
Complete mockup storyboards, layout structures, and copy.

SVG logo assets and brand colors.

Note on Photography: Final hardware renders are still a work in progress. Please plan to use temporary placeholder boxes during the build. Before launch, I will need you to provide an "image punch list" (exact pixel dimensions for every image slot) so I can render my final assets to fit your grid perfectly without cropping surprises.

---Technical Requirements:

No bloated themes or unnecessary third-party add-on plugins to fake visual effects.

Clean, semantic html/css and fast load times.

Flawless mobile responsiveness.

To Apply (Please Read Carefully):
To show you have read all of this brief (and that you're not some agency bot),  please start your proposal by answering this specific question: How exactly would you code the smoothly gliding active-indicator in the sticky header without relying on a bloated third-party add-on plugin?

Also, please also include 2 or 3 links to recent GenerateBlocks (or highly optimized native block) sites you have built so I can test their load speeds.

If you've got any questions, please dont hesitate to ask!