Mellow / Joan Sau Barcelona · Personal portfolio

Technical foundation. Creative execution. Full-funnel Meta Ads.

I’m Mellow. I transition from data automation and full-stack video editing into media buying. Having run my own e-commerce stores, I manage the whole funnel. I fix the tracking (CAPI), script direct-response ads, and iterate video hooks to scale accounts.

01 The foundation

It started with systems.

Data management, automation, web development and SEO - Excel, Power BI, Power Automate, Power Apps. That’s still the base I work from: find the structure, measure it, improve it.

Then came business. I cold-called local businesses and turned those calls into a small web-design venture, worked as a referral partner, and built Shopify stores for my own e-commerce projects.

I ran Meta Ads for my own native e-commerce stores, managing the end-to-end funnel with my personal capital. I successfully scaled ad spend up to €1,500 in a single week while maintaining profitability.

Now, my goal is to step away from day-to-day e-commerce operations to focus 100% on what motivates me the most: Media buying, creative testing, and data tracking within a team.

  1. 01Technical foundation
  2. 02Data & analysis
  3. 03Creative production
  4. 04Business exposure
  5. 05Meta Ads
  6. 06CRO

02 Working toolkit

Three sides of the same work.

I understand performance, I understand technology, and I can produce the creative.

01

Meta Ads & Performance

  • Meta Ads Manager
  • Shopify
  • GoHighLevel
  • GetHookd
  • TrendTrack
02

Technical & Data

  • Excel
  • Power BI
  • Power Automate
  • Power Apps
  • Web development
  • Data management
  • SEO
03

Creative

  • Ad copy & scripts
  • Creative development
  • Video editing & creation
  • DaVinci Resolve
  • Canva
  • Figma

03 What I’m building toward

Data-Driven Media Buying.

The goal: become a specialized Meta Ads media buyer within a fast-growing team. I find creative angles, run modular tests, configure accurate tracking (CAPI), and lower acquisition costs by optimizing the algorithm.

  • Creative testing
  • Campaign analysis
  • Landing pages
  • CRO

04 Why this combination

Different inputs. One way of working.

Technical

Data, dashboards, automations and site builds don’t slow me down.

Creative

Idea to copy, script, design and edited video - myself.

Analytical

I want to know why one version wins and the other doesn’t.

05 Portfolio in progress

The next work belongs here.

Reserved for real work: the brief, the thinking, the tests and what they actually showed.

01 / Realized

Creative Hook Iteration

Executed modular creative tests across multiple video hooks to combat ad fatigue, successfully stabilizing acquisition costs and recovering profitability.

Case Study
02 / Realized

Data & CAPI Architecture

Configured robust, deduplicated tracking systems using Meta Pixel and Conversions API to ensure accurate algorithm optimization.

Live Implementation
03 / Realized

Partner Creative Pipeline

Managed the full creative pipeline (scripting and rapid video iteration) for partner e-commerce stores generating €150k/month.

Freelance
04 / Available

[Scale Phase]

Reserved space for a new scaling challenge. Awaiting a brand ready to push budgets and lower CPA.

Awaiting Brief
05 / Available

[Creative Iteration]

Awaiting the next batch of raw assets to script, edit, and aggressively test against the control ad.

Awaiting Brief
06 / Available

[Landing Page CRO]

Reserved for a post-click optimization case study. Turning cheap outbound clicks into highly profitable buyers.

Awaiting Brief
Looking for opportunities to expand this portfolio.

If you’re building something and need someone hungry to learn, test and execute -> Let’s talk.

Start a conversation

Outside of work

  • Chess
  • Theoretical economics
  • Philosophy
  • Nutrition
  • Puzzles
  • Strategy games

English, Spanish, Catalan · learning German and Russian

06 Contact

Let’s put something real on the board.

I’m looking for opportunities to expand this portfolio: freelance work, junior roles, collaborations and internships, with founders, teams or agencies.