Challenge
There is traffic, but sales are not growing.
Risk
Marketing spend does not deliver the expected return.
Solution
We identify UX barriers in the funnel and prioritize changes based on their impact on conversion.
+94 SATISFIED CLIENTS
eCommerce UX/UI Design Services
Make every step easier for shoppers and increase conversion by up to 20% with smarter eCommerce UX/UI.
Talk to foundersGet free estimation in 24h
120+
projects delivered
95%
satisfied clients
3+
years collaboration
20+
countries served
120+
projects delivered
95%
satisfied clients
3+
years collaboration
20+
countries served
Why us
Problems We Help Ecommerce Businesses Overcome
Customers visit the website, browse products, and even add them to the cart, but some orders are never completed. We identify UX barriers that cause the store to lose potential sales and help eliminate them.
OUR EXPERTISE
UI/UX Design Services for eCommerce Businesses
Every store has its own growth opportunity: one needs UX/UI from scratch, another needs a redesign, while another needs to improve its mobile version or checkout. We will help determine the required sco
We design new online stores with the brand, product range, and customer behavior in mind.
Create a clear structure and navigation
Plan the complete path to purchase
Build a foundation for store growth
We update existing stores based on UX research, business goals, and customer needs.
Align the interface with the brand identity
Improve navigation and key user flows
Strengthen customer trust
We optimize the customer journey based on behavioral data so that more visitors become customers.
Identify customer drop-off points
Prioritize UX improvements
Help increase conversion rates
We design the mobile path to purchase with small screens and touch interactions in mind.
Adapt navigation for small screens
Improve mobile product pages
Simplify checkout
We help customers find, compare, and choose products faster.
Improve search, filters, and sorting
Structure information on the product detail page (PDP)
Design configurators and complex options
We simplify the journey from adding a product to the cart to order confirmation.
Optimize the cart and forms
Provide information about delivery and payment terms
Eliminate unnecessary fields, steps, and distracting elements
CHALLENGES WE SOLVE
When Standard eCommerce Functionality Is No Longer Enough
We build custom eCommerce applications that remove operational bottlenecks, connect fragmented systems, and support complex business processes at scale.
Challenge
Risk
Solution
There is traffic, but sales are not growing.
Marketing spend does not deliver the expected return.
We identify UX barriers in the funnel and prioritize changes based on their impact on conversion.
Customers find it difficult to find and choose a product.
Customers who are ready to buy go to competitors.
We improve the catalog, navigation, search, filters, and product pages.
Customers abandon the cart or do not complete checkout.
The store loses orders at the final steps.
We simplify checkout and clearly present information about delivery, payment, and purchase terms.
Mobile traffic is high, but conversion is low.
The store misses out on orders from a significant share of mobile traffic.
We optimize the mobile journey from browsing the catalog to payment.
The store design does not match the brand level.
Customers question its reliability and postpone placing an order.
We create a consistent interface that matches the brand identity and clearly presents key information.
It is unclear which changes will actually improve performance.
The business risks spending budget on changes that do not improve key metrics.
We support every decision with analytics, behavioral data, and scenario testing.
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Case studies
Some of the Work We're Most Proud Of
From eCommerce to fintech, our clients span 20 countries and every project is different.
High Fashion Demands High Speed: Cultnaked’s Technical Reboot
How Stellar cut Shopify load time to under 2 seconds, increased conversions by 25%, reduced manual work by 40%, and helped drive 20% sales growth.
+25%
Conversion rate
-40%
Manual work+20%
Sales growth
Refactoring the AfterCart Shopify App: From Manual Theme Coding to Native App Blocks
AfterCart migration to Shopify 2.0: removed delays caused by on-the-fly protection product creation and reduced the risk of transaction fee losses.
3
Master Products200+
Price VariantsMINIMAL
Install Support
Why Bioma's Billing Lives Outside Magento - And How We Still Shipped in 2–3 Months
Peak season was 2–3 months away and the subscription store wasn't live yet. See how Stellar built it on Magento with Chargebee billing.
2–3 mo
Launch completed on timeDAY 1
Full commerce flow liveGREEN
Core Web Vitals under peak load
Sculptural Design, Flawless Speed
How we helped Côte&Ciel improve performance across three Shopify storefronts, while the EU store recorded a 7% YoY increase in conversion.
GREEN
Green Core Web VitalsMajor
Lighthouse Gains3
Markets, One Process
87% Mobile Traffic and Nearly €1M in Gross Sales: How We Rebuilt Hey Holy's Shopify Frontend
Custom quiz, calorie calculator, and multi-discount cart for a mobile-first Shopify store – built with Web Components + Alpine.js.
14,588
Quiz Engagement78.23%
Returning Customers2.5%
Mobile Performance
Every Product Sells Once
How we optimized a London antique retailer's Magento 2 store - custom analytics, faster search, −22% order processing time and +18% ROAS. 8-year partnership.
+18%
ROAS−22%
Order processing time10+
Hours saved weekly
How We Migrated Baketivity to Shopify Plus and Rebuilt Its Subscription Ecosystem
How Stellar migrated Baketivity from WooCommerce to Shopify Plus, rebuilt subscription logic, preserved data, and added ClassWallet features.
~65%
Returning customers1 min
0 Data Loss$
Custom Subscriptions
Shopify Horizon Migration: How King of Christmas Reduced Hardcoding and Achieved Content Autonomy
How we migrated King of Christmas from a hardcoded Dawn theme to Horizon, avoided an estimated 1,000+ development hours, and unlocked marketing autonomy.
4.8
Trustpilot rating130K+
Customer reviews0
Downtime
Green Zone for an Online Pharmacy: How We Migrated Chemist4You to Hyvä Themes Without Downtime
See how Stellar moved a UK online pharmacy to Hyvä Themes, upgraded Magento to 2.4.7-p1, and hit Google's green Core Web Vitals - with zero downtime.
4.8
Trustpilot rating130K+
Customer reviews0
Downtime
Why us
Why Businesses Trust Stellar for eCommerce App Development
We combine deep eCommerce expertise, integration experience, and a product-focused development approach to build scalable applications that support complex operations and long-term growth.
We combine deep eCommerce expertise, integration experience, and a product-focused development approach to build scalable applications that support complex operations and long-term growth.
01
eCommerce-Focused Team
We bring together experienced developers, architects, and product specialists with hands-on expertise across complex eCommerce platforms, workflows, and integrations.
02
100+ Integration Projects Delivered
We have practical experience connecting eCommerce systems with ERP, CRM, PIM, WMS, 3PL, payment gateways, and other business-critical platforms.
03
Custom Apps for Complex Operations
We build tailored applications for automation, backend workflows, integrations, customer experiences, and platform-specific business requirements.
04
Long-Term Product Partnership
We support applications beyond launch with continuous development, optimization, scaling, and technical improvements as business requirements evolve.
Our eCommerce UX/UI Design Process
Strong eCommerce design starts with understanding the business and customers. That’s why we make decisions based on data, validate them through prototypes, and prepare them for implementation.
- 01
Goals & Discovery
We define business goals, target audience, key metrics, technical constraints, and scenarios that require the most attention.
- 02
Data & Research
We analyze available web analytics data, the funnel, heatmaps, and session recordings, research the competitive landscape, and formulate UX hypotheses.
- 03
Journey & Structure
We build the customer journey, user flows, and information structure to make the path to purchase clear and eliminate unnecessary steps.
- 04
Wireframes & Validation
We create wireframes for key pages and interactive prototypes of core scenarios, test them, and refine solutions before moving on to visual design.
- 05
UI & Design System
We develop a responsive interface, expand the component system, and align the design with the brand identity.
- 06
Handoff & Design QA
We prepare layouts, specifications, and component states, hand them off for development, and verify that the implementation matches the approved design.
Technologies and frameworks
Modern Tools for Stable E-commerce Platforms
We use a tech stack that allows projects to be launched quickly and adapted to the specific needs of a company’s operations.
Digital Design
Figma
Adobe Photoshop
Adobe XDBack-end
PHP
Laravel
Symfony
Java
Spring
Nest.js
Express.jsFront-end
React
Next.js
Angular
Vue
NuxtHeadless Commerce
Headless Commerce ArchitectureCMS / E-commerce Platforms
Shopify Plus
Adobe Commerce (+Cloud)
WordPress
WooCommerceBusinesses That Trust Us with Development
We build custom eCommerce applications for online stores, digital brands, and SaaS platforms — helping automate operations, connect business systems, and support scalable growth.
netparcel
sigma
a&g
pineapple
bering
cultnaked
lock
nila
heyholy
webloft
lgfgClient Feedback
Client Reviews About Their Collaboration Experience
Discover how our solutions help overcome technical barriers, maintain system reliability, and implement innovations that drive sales growth.
4.9
Overall Review Rating
Annika Rahm
Co-Founder at HEY HOLY, an eCommerce pet brand
5.0
Three Years of Reliable Delivery
Stellar has supported our Shopify store for two years, building backend functionality and custom tools. They’re fast, responsive, and reliable.
Matthew Burleton
Creative Director at Long Story Short
5.0
Built on Clarity and Speed
Stellar impressed us with clear, fast communication and a well-structured process, especially when deadlines were tight and quick decisions were critical.
Dimitry Toukhcher
CEO, LGFG Fashion House
5.0
Stellar transformed our sales processes, streamlining operations and automating manual work to save significant time and improve the overall customer experience.
Kelwin Fernandes
Owner at NILG.AI
5.0
Stellar stood out among five shortlisted companies with a detailed, transparent plan and pricing strategy. Jack also provided clear guidance and valuable insights.
Yousef Jaikat
Shopify & eCommerce Expert, Owner at Digitalebox.de
5.0
Stellar’s Shopify expertise and ability to deliver advanced custom solutions reflect strong technical skills and a focus on scalable, high-quality eCommerce.
Rebecca Wilson
Director of Marketing at Cooper Mountain Technologies
5.0
They bring a positive attitude and use their expertise to improve projects beyond the brief, considering key factors like SEO, responsiveness, and overall quality.
Tim Ito
Co-owner, Marketing Nice Guys
5.0
They consistently deliver on time and within budget, follow through on commitments, and stay proactive with communication - even when clients are slow to respond.
Want to Increase Conversion with UX/UI Design?
Tell us about your ideas and goals: we’ll propose a UX/UI approach focused on conversion, average order value, and retention.
Vladimir Gubarev
COO and Co-founder
Jack Ananchenko
CТO and Co-founder
FAQ
Frequently Asked Questions
How do you determine whether we need a full redesign or just a redesign of specific pages?
001.How much does eCommerce UX/UI Design cost, and what does the price depend on?
002.How long does it take to design or redesign an online store?
003.How do you reduce the risk of conversion rates dropping after launching a new design?
004.Do you integrate with our eCommerce platform and development process?
005.What data and access do you need from us before starting the project?
006.How do you determine which changes will bring the greatest benefit to the business?
007.What exactly will we receive after the design project is completed?
008.Do you support design implementation and review before launch?
009.How does UX/UI affect conversion, average order value, and repeat sales?
010.Blog
