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I’m Athanasios (Thanos) Kalteziotis, a performance marketer with 6+ years of hands-on e-commerce experience. Since 2020, I’ve helped DTC and e-commerce brands scale through Meta and Google advertising, Shopify growth, and conversion-focused improvements across markets including Greece, Cyprus, and Ukraine. I’ve managed €1M+ in Meta ad spend across 7+ brands, driving measurable gains in online revenue and traffic. Most recently, I scaled a skincare Shopify store from zero to €209K in 13 months and built strong tracking and retention systems (GA4 + Klaviyo), while also leading in-house creative and systematic video workflows to improve performance.…I’m Athanasios (Thanos) Kalteziotis, a performance marketer with 6+ years of hands-on e-commerce experience. Since 2020, I’ve helped DTC and e-commerce brands scale through Meta and Google advertising, Shopify growth, and conversion-focused improvements across markets including Greece, Cyprus, and Ukraine. I’ve managed €1M+ in Meta ad spend across 7+ brands, driving measurable gains in online revenue and traffic. Most recently, I scaled a skincare Shopify store from zero to €209K in 13 months and built strong tracking and retention systems (GA4 + Klaviyo), while also leading in-house creative and systematic video workflows to improve performance.

Athanasios Kalteziotis

Performance Marketer, Marketing Consultant, Digital Marketer, +5

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I’m Athanasios (Thanos) Kalteziotis, a performance marketer with 6+ years of hands-on e-commerce experience. Since 2020, I’ve helped DTC and e-commerce brands scale through Meta and Google advertising, Shopify growth, and conversion-focused improvements across markets including Greece, Cyprus, and Ukraine. I’ve managed €1M+ in Meta ad spend across 7+ brands, driving measurable gains in online revenue and traffic. Most recently, I scaled a skincare Shopify store from zero to €209K in 13 months and built strong tracking and retention systems (GA4 + Klaviyo), while also leading in-house creative and systematic video workflows to improve performance.…I’m Athanasios (Thanos) Kalteziotis, a performance marketer with 6+ years of hands-on e-commerce experience. Since 2020, I’ve helped DTC and e-commerce brands scale through Meta and Google advertising, Shopify growth, and conversion-focused improvements across markets including Greece, Cyprus, and Ukraine. I’ve managed €1M+ in Meta ad spend across 7+ brands, driving measurable gains in online revenue and traffic. Most recently, I scaled a skincare Shopify store from zero to €209K in 13 months and built strong tracking and retention systems (GA4 + Klaviyo), while also leading in-house creative and systematic video workflows to improve performance.

Available to hire

I’m Athanasios (Thanos) Kalteziotis, a performance marketer with 6+ years of hands-on e-commerce experience. Since 2020, I’ve helped DTC and e-commerce brands scale through Meta and Google advertising, Shopify growth, and conversion-focused improvements across markets including Greece, Cyprus, and Ukraine.

I’ve managed €1M+ in Meta ad spend across 7+ brands, driving measurable gains in online revenue and traffic. Most recently, I scaled a skincare Shopify store from zero to €209K in 13 months and built strong tracking and retention systems (GA4 + Klaviyo), while also leading in-house creative and systematic video workflows to improve performance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Greek, Modern

Fluent

English

Advanced

Work Experience

E-commerce Growth / Performance Marketer (Shopify + Ads) at LABBOK Cyprus

January 1, 2025 - Present

Launched the Shopify store from scratch and scaled it to €209K in sales in 13 months on €65K ad spend (3.2x blended ROAS). Generated 127K+ visits, grew monthly traffic 4.2x, and increased monthly revenue 9x within the first year. Implemented CRO through full site redesign, set up Google Ads, Merchant Center, and GA4 tracking from scratch, and restructured Klaviyo email marketing.

Performance Marketing Consultant / Shopify & Content Specialist at Independent Consultant

January 1, 2025 - Present

Provided performance marketing, Shopify development, and content support for e-commerce, hospitality, and sports brands. Delivered setup and optimization work across paid acquisition and conversion improvements, including tracking, account optimization, and landing/store enhancements.

E-commerce Marketer (Shopify + Paid Media + Retention) at LABBOK Greece

January 1, 2025 - Present

Increased online sales 4.8x year over year in 12 months on €70K ad spend (3.6x blended ROAS). Scaled site traffic 6.2x to 165K+ visits and grew Facebook/Instagram visits from 3.4K to 90K+ using consolidated CBO structure and a systematic video creative workflow. Rebuilt product pages using custom Shopify Liquid, managed Google Search and Shopping campaigns, and ran email/SMS/Viber through Klaviyo-style retention operations.

E-commerce Marketer (Shopify + Paid Media) at LABBOK Cyprus

January 1, 2025 - Present

Launched a Shopify store from zero and scaled it to €209K sales in 13 months on €65K ad spend (3.2x blended ROAS). Drove 127K+ visits, improved traffic 4.2x, and grew monthly revenue 9x in the first year. Implemented CRO changes, rebuilt conversion foundations (GA4 tracking, Google Ads/Merchant Center), restructured Klaviyo email marketing, and improved on-site performance through complete site redesign.

Performance Marketing Consultant at Independent Consultant

January 1, 2025 - Present

Provide performance marketing and e-commerce support including Shopify development, conversion tracking, and content strategy across e-commerce, hospitality, and sports brands. Work includes launching and scaling Shopify stores, setting up Google Ads and analytics, and creating/optimizing customer acquisition and retention campaigns.

Performance Marketing Consultant at LABBOK Greece (Premium organic skincare)

January 1, 2025 - Present

Grew online sales 4.8x year over year in the 12 months after taking over, on €70K ad spend (3.6x blended ROAS). Scaled site traffic 6.2x to 165K+ visits and increased Facebook/Instagram visits from 3.4K to 90K+ via a consolidated CBO structure and a systematic video creative workflow. Rebuilt product pages with custom Shopify Liquid and Google Ads tracking aligned to GA4, and ran email, SMS, and Viber campaigns.

Performance Marketing Consultant at LABBOK Cyprus (Premium organic skincare)

January 1, 2025 - Present

Launched the Shopify store from zero and scaled it to €209K in sales in 13 months on €65K ad spend (3.2x blended ROAS). Drove 127K+ visits to the new store, growing monthly traffic 4.2x and monthly revenue 9x within the first year. Set up Google Ads, Merchant Center and GA4 tracking from scratch, and restructured Klaviyo email marketing.

Independent Consultant (Performance Marketing, Shopify & Content)

January 1, 2025 - Present

Provide performance marketing, Shopify development, and content services for e-commerce and hospitality brands. Responsibilities include scaling paid acquisition (Meta/Google/TikTok), setting up GA4 conversion tracking, Merchant Center, and shop analytics, restructuring retention (Klaviyo/MailerLite/email/SMS/Viber), and improving site assets such as product pages using Shopify Liquid and ad/tracking alignment.

Independent Consultant (Performance Marketing & Shopify) at Independent Consultant

January 1, 2025 - Present

Performance marketing, Shopify development, and content for e-commerce and hospitality brands. Worked with multiple clients including LABBOK (Cyprus and Greece), For Love and Pets, Padel Club Tripolis, and Milea Agritourism. Built Shopify stores from scratch, improved conversion through product page rebuilds, and implemented conversion tracking and analytics (GA4, Google Ads tracking, Merchant Center). Managed Meta and Google Ads and restructured retention marketing (Klaviyo, email/SMS/Viber) to support revenue growth. Notable results: LABBOK Cyprus scaled to €209K sales in 13 months on €65K ad spend (3.2x blended ROAS) with 127K+ visits; LABBOK Greece grew online sales 4.8x YoY in 12 months on €70K ad spend (3.6x blended ROAS) and scaled traffic 6.2x to 165K+ visits.

Founder / Marketing Lead at Python Gym Clothing

January 1, 2020 - January 1, 2026

Founded and scaled a DTC sports supplements and apparel brand, running all marketing in-house. Managed Meta Ads, social media content, and day-to-day ecommerce operations on the online store. After acquisition, continued as Marketing Lead, maintaining performance marketing execution. Successfully exited the business in 2026, while staying to support the new owners with continued marketing operations.

Founder, Marketing Lead at PYTHON GYM CLOTHING

January 1, 2020 - January 1, 2026

Founded a DTC sports supplements and apparel brand and managed all marketing in-house, including Meta Ads, social content, and the online store. After acquisition, continued as Marketing Lead, scaling performance marketing activities and owning day-to-day execution across paid media and Shopify. Sold the business in 2026 and stayed on to run marketing for the new owners.

Founder (Marketing Lead after acquisition) at Python Gym Clothing

January 1, 2020 - December 31, 2026

Founded a DTC sports supplements and apparel brand and initially ran all marketing in-house: Meta Ads, social media content, and the online store. Continued as Marketing Lead after acquisition. Sold the business in 2026 for an €80K exit and stayed on to run marketing for the new owners.

Founder / Marketing Lead (after acquisition) at Python Gym Clothing

January 1, 2020 - December 31, 2026

Founded and managed all marketing for a DTC sports supplements and apparel brand, including Meta Ads, social media content, and the online store. After the brand was acquired, continued as Marketing Lead to drive performance. Achieved an €80K exit in 2026, while maintaining responsibility for the marketing engine in-house prior to and after acquisition.