JJ
E-commerce specialist

Justas Jankauskas

E-commerce · Marketplace · Product · AI

E-commerce specialist with 7+ years of hands-on marketplace experience, mostly on Etsy: product research, trend spotting, listing optimization, pricing, orders and customer experience. I use AI tools and automation to work faster, and enjoy turning ideas into practical e-commerce solutions.

Portrait of Justas Jankauskas
7+Years
experience
3,000+Product listings created and optimized
16,000+Customer orders managed
€400k+Cumulative
Etsy revenue
Email me LinkedIn ↗ Klaipėda, Lithuania
Selected work
01

SetMock

Portfolio project · SaaS tool

Designed and built a web tool for Etsy and print-on-demand sellers that places one design onto many mockup templates at once, so a full set of listing images takes seconds instead of an afternoon in Photoshop.

SaaSE-commerceUI/UXProduct Design
Setmock homepage: Set the placement once. Every design lands there.setmock.com ↗
02

NutraValid

Portfolio project · Product concept & Shopify store

Created the concept for a supplement brand: product idea, positioning, brand name and packaging design. Prepared it for the German market with German-language packaging and third-party lab testing, then built and designed its Shopify store, including a custom product page with animated sections.

Product ConceptBrandingPackagingShopifyGerman MarketUI/UX
NutraValid store homepage with the All-in-1 supplement bottlenutravalid.com ↗
03
Sample

HUST Design product page

Redesign concept · E-commerce product page

This is a temporary example made for visual purposes only. It is not affiliated with or commissioned by HUST Design, and the store itself has not changed.

UI/UXE-commerceProduct PageRedesignHTML/CSS
Product page concept for the BUDDHA coffee table: photo gallery on the left, price and options on the rightView concept ↗
ExperienceOct 2018 — Present

E-commerce & Etsy Marketplace Manager

Hands-on experience building and managing Etsy shops from scratch, alongside other marketplaces like eBay.

  • Built and grew Etsy shops from scratch: niche research, branding, listings, pricing and customer service
  • Created and optimized 3,000+ product listings
  • Managed 16,000+ customer orders
  • Researched products, markets and competitors to find new opportunities
  • Spotted market trends and launched high-performing products
  • Managed product assortment, pricing and positioning
  • Optimized product titles, descriptions, keywords and visuals
  • Improved conversion and revenue through listing and pricing optimization
  • Ran day-to-day operations from product research to fulfillment and customer service
  • Sourced from suppliers in China and coordinated shipping
  • Etsy (main) · Shopify · eBay · Printify · Printful
  • Used AI tools and automation for research, content, visual production and business workflows

Key areas

  • Etsy shop management
  • Product research & development
  • Marketplace management
  • SEO & listing optimization
  • Pricing & positioning
  • Product assortment
  • Customer behaviour & experience
  • Supplier management
  • AI & automation

Education

Marketing and AdvertisingSMK University of Applied Sciences
2017 — 2019
Front-End Development Course (Level 1)CodeAcademy
2021
Skills & tools
Platforms
  • EtsyMain marketplace
  • ShopifyStore platform
  • eBayMarketplace
  • PrintifyPrint on demand
  • PrintfulPrint on demand
Design & AI tools
  • PhotoshopMockups & retouching
  • IllustratorVector design
  • CanvaQuick creatives
  • FigmaUI & concepts
  • ClaudeAI assistant
  • ChatGPTAI assistant
  • MidjourneyAI images
  • IdeogramAI text-in-image designs
  • Google SheetsData & pricing

Core skills

E-commerce & Marketplace ManagementProduct & Market ResearchCompetitor AnalysisProduct DevelopmentListing Optimization & SEOPricing & AssortmentCustomer Behaviour & ExperienceSupplier ManagementConversion OptimizationAI & Automation
About

What I enjoy most is research and analysis: digging into a market, finding gaps where there is real demand but no good offer yet, and turning those opportunities into products. Most of my experience comes from Etsy and e-commerce, where I've tested ideas, built products around what customers were actually searching for, and used real sales data to understand what worked. I'm curious by nature, enjoy learning new things, and like turning ideas into something practical — whether that's an e-commerce product, or a tool that solves a problem.

Languages
Lithuanian Native
English Professional
German Basic
Contact
Phone+370 638 86475Lithuanian or English