Custom eCommerce development services

Nexterse LLC develops and improves eCommerce platforms for companies that prioritize stable growth and profitability. We handle the complexities: architecture, integrations, performance, security, and post-launch support. You get predictable deadlines, a transparent budget, and a team committed to delivering results.

  • ISO 9001:2015 certification for quality management
  • ISO/IEC 27001:2022 for data security
  • SOC 2 compliance for security, processing integrity, confidentiality, and privacy
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Clients rate our services

5,0

Why choose Nexterse LLC services

  • We offer strong eCommerce expertise backed by successful projects.
  • Since 2012, we've implemented over 250 solutions for Clients in 25+ countries.
  • Nexterse LLC is recognized as one of the top eCommerce developers in the US.
  • 70% of our employees are senior-grade engineers.
  • Techreviewer ratings note our experience in Shopify development and migrations.
  • Our Clients include Toyota, Beiersdorf, Cornerstone OnDemand, Dexai Robotics, and other international companies.
  • We strive to be a long-term technology partner for our Clients.
Ecommerce store

eCommerce development services

Custom eCommerce development from scratch

Custom eCommerce development from scratch

When standard platforms are no longer sufficient, we do the following for you:

  • Identify business goals, budget, time constraints, and the specifics of your market.
  • Develop the catalog structure, shopping cart, promotional mechanics, taxes, shipping, and user roles.
  • Create an architecture that enables product development.
Existing eCommerce solution audit

Existing eCommerce solution audit

We analyze your current store or marketplace at every level: code, architecture, security, UX, and performance to:

  • Identify bottlenecks, technical debt, and security and crash risks.
  • Prepare a report with specific recommendations and prioritization.
  • Separately assess where it's more profitable to fix and where it's easier to rewrite a block or module.
Mobile eCommerce applications

Mobile eCommerce applications

We develop mobile applications for iOS and Android for online stores and marketplaces that:

  • Facilitate one-handed purchases, quick repeat orders, push notifications, and saved carts.
  • Have integrations with your existing website or create a unified backend for all channels.
  • We support store releases and user behavior analytics.
Redesign and modernization of eCommerce platforms

Redesign and modernization of eCommerce platforms

We update legacy stores to improve conversion and assist marketing with:

  • New UX logic for the catalog, filters, search, cards, cart, and checkout.
  • Backend optimization: queries, cache, integrations, and database operations.
  • Maintenance of SEO rankings and minimization of the risk of organic traffic decline.
eCommerce integrations with internal systems

eCommerce integrations with internal systems

We connect your online store with your internal systems, payment providers, and delivery services so data stays in sync:

  • Synchronization of orders, inventory, prices, and delivery statuses.
  • Integrations are made fault-tolerant, with logging and clear alerts.
  • Backup scenarios in case of external service failures.
Support and development of eCommerce solutions

Support and development of eCommerce solutions

We provide post-release and post-migration support by:

  • Fixing bugs, optimizing performance, and adding functionality in accordance with the agreed-upon backlog.
  • Assisting marketing with experiments: A/B tests, promotional mechanics, and new storefront options.
  • We work as a dedicated team or on a fixed-hours basis.

Build your custom store

Launch a high-performing, scalable online store tailored for your brand.

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Platforms and technologies we work with

Custom eCommerce solutions

We build custom eCommerce solutions using Ruby on Rails, Node.js, React, Vue, and other modern stacks, choosing the right one for each task. A custom approach is justified when non-standard logic, complex integrations, and high loads are required. We carefully consider the cost of ownership to ensure the architecture is not overly complex.

Custom eCommerce solutions

Shopify and Shopify Plus

Nexterse LLC is one of the top Shopify developers in the US and other regions, according to Techreviewer. We create custom themes, apps, integrations, and migrations from other platforms. Mid-market companies employ us to migrate to Shopify Plus without losing data or SEO. We set up payments, taxes, logistics, and reporting, taking into account business and market requirements.

Shopify and Shopify Plus

More platforms and ecosystems

We work with BigCommerce, WooCommerce, and a range of less common solutions. Our evaluations are always honest about when it makes sense to improve an existing platform and when it's cheaper to migrate. We integrate eCommerce with Salesforce and other enterprise systems, and we review the overall integration architecture.

More platforms and ecosystems

Types of eCommerce solutions we work with

B2C online stores

Stores for brands and online retailers targeting consumers.

  • We focus on search, filters, promotional features, checkout speed, and mobile experience.
  • We take into account taxes, cross-state shipping, and local market specifics.

B2B portals and wholesale accounts

B2B portals for manufacturers, distributors, and wholesalers.

  • We implement account roles, order approvals, customized price lists, and catalogs.
  • We develop complex pricing models, credit limits, and payment terms.
  • We create user-friendly interfaces for managers.

Marketplaces for small and medium businesses

Such marketplaces as SellBig, a platform where small businesses sell within the US and internationally.

  • We set up seller onboarding, moderation, storefronts, and sales analytics.
  • We implement chatting between sellers and buyers, returns, disputes, and reports for administrators.
  • We provide a flexible, manageable catalog, banner areas, and SEO settings for categories and cards.

eCommerce for food delivery and on-demand services

Sous Kitchen is an example of a home-cooked food service that we migrated to a new platform.

  • We know how to account for time slots, delivery zones, and kitchen schedules.
  • We build routing, order statuses, notifications, and bonus programs.
  • We create dashboards for the kitchen, couriers, and support staff so that all participants can see up-to-date data.

eCommerce within content and service portals

Portals such as Hauz, which is an interior design website where users explore ideas and buy products immediately.

  • We can connect content, product catalogs, and service provider selection in a single solution. This approach is suitable for niche media, service marketplaces, and educational platforms.
  • eCommerce becomes part of the ecosystem, rather than a separate website.

Social commerce and mobile storefronts

Solutions that connect purchases and user social behavior.

  • We add feeds, favorites, reviews, collections, and mechanisms for influencer and recommendations.
  • We consider which triggers and events are essential to track for marketing and product analytics.
  • We immediately establish a unified user profile between the website and the app.

Recent software we made

UShopper
UShopper

UShopper โ€“ iOS eCommerce platform with Apple Pay

~30% lower checkout drop-off with Apple Pay integration; full iOS storefront from kickoff to launch in 1 month.

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  • Startups
Fuelz
Fuelz

Fuelz aggregator web platform

A heating oil price aggregator that cut buyers' delivery costs by up to 20% through real-time price comparison across 20+ UK suppliers, with built-in order management and operator analytics.

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  • Enterprise
Sous Kitchen
Sous Kitchen

Sous Kitchen โ€“ eCommerce platform for food delivery service

An eCommerce platform that grew repeat purchases by ~30% through integrated loyalty and gift card features, replacing a manual ordering system for a US food delivery service covering five states.

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  • Startups
Sellbig
Sellbig

Sellbig eCommerce marketplace for small businesses

A transaction-fee marketplace for US small businesses, built from scratch in 4 months, giving sellers full store management: listings, orders, refunds, and analytics in one platform.

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  • Startups

Dave Alce

COO

From the early stages of the project, Nexterse LLC demonstrated a proactive attitude, actively seeking opportunities to enhance the solution and anticipate our needs. They consistently took the initiative to address any potential issues, provide timely updates, and offer solutions to challenges that arose during development. This proactiveness greatly contributed to the project's success and exceeded our expectations.

Alexander McCaig

Alexander McCaig

Co-Founder & CEO, Tartle

The system has produced a significant competitive advantage in the industry thanks to Nexterse LLC's well-thought opinions. They shouldered the burden of constantly updating a project management tool with a high level of detail and were committed to producing the best possible solution.

Andrey Kubka

Andrey Kubka

Product Technology Manager, Mediatron

Nectarin LLC aimed to develop a complex Ruby on Rails-based platform, which would be closely integrated with such systems as Google AdWords, Yandex Direct and Google Analytics.

Benjamin Dorsinvil

Benjamin Dorsinvil

Founder, SellBig

I was impressed by Nexterse LLC's prices, especially for the project I wanted to do and in comparison to the quotes I received from a lot of other companies. Also, their communication skills were great; it never felt like a long-distance project. It felt like Nexterse LLC was working next door because their project manager was always keeping me updated.

Damian Gevertz

Damian Gevertz

Founder & CEO, Widgety

We tried another company that one of our partners had used but they didn't work out. I feel that Nexterse LLC does a better investigation of what we're asking for. They tell us how they plan to do a task and ask if that works for us. We chose them because their method worked with us.

Domien Van Eynde

Domien Van Eynde

Team Lead, Daiokan.com

Nexterse LLC is the firm to work with if you want to keep up to high standards. The professional workflows they stick to result in exceptional quality. Importantly, they help you think with the business logic of your application and they don't blindly follow what you are saying. Which is super important. Overall, great skills, good communication, and happy with the results so far.

Katerina Bromberg

Katerina Bromberg

Co-Founder, MyMediAds.com

Together with the team, we have turned the MVP version of the service into a modern full-featured platform for online marketers. We are very satisfied with the work the Nexterse LLC team has performed, and we would like to highlight the high level of technical expertise, coherence and efficiency of communication and flexibility in work. We can confidently say that Nexterse LLC has put all our ideas into practice.

Maria Duyunova

Maria Duyunova

Director, Simplimagine LLC

We are absolutely convinced that cooperation between companies is only successful when based on effective teamwork. But the teams may vary on the degree of their cohesion.

Michael Karbushev

Michael Karbushev

Senior Director of Engineering, Evolv

They are very sharp and have a high-quality team. I expect quality from people, and they have the kind of team I can work with. They were upfront about everything that needed to be done. I appreciated that the cost of the project turned out to be smaller than what we expected because they made some very good suggestions. They are very pleasant to work with.

Paul S. Chun

Paul S. Chun

CTO, Rivalfox GmbH

Rivalfox had the pleasure to work with Nexterse LLC in building out core portions of our product, and the results really couldn't have been better. Nexterse LLC provided us with engineering expertise, enthusiasm and great people that were focused on creating quality features quickly.

Pratasevich Ivan

Chief Executive Officer, Ivanco-Media LLC

We'd like to thank Nexterse LLC for the exceptional technical services provided for our business. It should be noted that we started our project's development with another team, but the communication and the development process in general were not transparent and on schedule. It resulted in a low-quality final product.

Yevgeniy Rozenblat

Yevgeniy Rozenblat

Program Manager, TL Nika

Nexterse LLC succeeded in building a more manageable solution that is much easier to maintain.

Yuriy Semenchuk

Yuriy Semenchuk

General Director, Business Car

When looking for a strategic IT-partner for the development of a corporate ERP solution, we chose Nexterse LLC. The company proved itself a reliable provider of IT services.

Yury Haverman

Founder, BoxForward

Thanks to Nexterse LLC's can-do attitude, amazing work ethic, and willingness to tackle clients' problems as their own, they've become an integral part of our team. We've been truly impressed with their professionalism and performance and continue to work with the team on developing new applications. We are completely satisfied with the results of our cooperation and will be happy to recommend Nexterse LLC as a reliable and competent partner for development of web-based solutions.

Alex Phelps

Alex Phelps

CEO

We've been working with Nexterse LLC for a few years, starting from the initial monitoring system, so they already understood our environment quite well. At the same time, they still managed to surprise us with their professionalism.

Dillon Christensen

Dillon Christensen

CEO

We'd like to sincerely thank Nexterse LLC for the work they've done on our maintenance system. At one point, our maintenance efforts became inefficient โ€“ long downtimes and rising repair costs became the norm.

Erica Lindsay

Erica Lindsay

Manager

We had already invested in AI, but the output was unclear. There were multiple initiatives across the company, each showing some promise, but no clear way to evaluate them or connect them to business outcomes.

Paul Fardoe

Paul Fardoe

Director

Nexterse LLC is flexible, efficient, and extremely good at planning and being proactive. They have also been very proactive in their approach throughout the project, seeking to understand the needs and the reasons behind them before launching into development, which has been helpful for maintaining direction and consistency.

Custom eCommerce development process

We design and develop bug-free eCommerce websites with customer-centered UX/UI to inspire your visitors to buy your products online.

1

Initial research

  • Analysis of stakeholders' needs
  • Analysis of key eCommerce competitors
  • Market and customer research for your niche
2

Discovery phase

  • Product vision
  • Software requirements specification (SRS)
  • Project roadmap
  • High-level eCommerce architecture design
3

eCommerce website design

  • Interactive eCommerce prototype
  • User journey mapping
  • UI design and motion basics (animations, micro-interactions)
  • Defining the visual style and tone of the website
  • Design reviews and feedback from stakeholders
4

eCommerce website development

  • Back-end development
  • Front-end development
  • Performance optimization
  • Integration of APIs and payment providers
5

Quality assurance

  • Functional testing
  • Non-functional testing (performance, security, usability)
  • Regression testing
  • Bug tracking and fixes
6

Release of the eCommerce website

  • Hosting setup and configuration
  • Migration from staging to production
  • Final round of testing in production-like conditions
7

Post-release support

  • Changes and improvements to existing features
  • Design and development of new features
  • Management of library and framework updates

Cost factors of custom eCommerce software

The cost of eCommerce website development depends on the project scope, technology, and business goals. Based on our experience, five factors most affect the budget.

Target audience

B2B eCommerce projects usually cost more than B2C stores.

Solution type

A marketplace needs more analysis and development than a simple online shop.

Scope

The broader the feature set, the higher the cost. Examples: complex search, custom pricing rules, multi-step checkout, loyalty programs.

Target platforms

We can build for web, mobile web, cross-platform apps, native apps, and other devices such as wearables. Each extra platform adds design, development, and testing effort.

Locations

Costs grow when you add regions, languages, and local payment and tax rules.

Schedule a strategy session

Discuss your revenue goals with our eCommerce experts.

Get in Touch

Awards& Recognitions

Clutch 2026 โ€” Top Python and Django Developers in Boston
GoodFirms โ€” Top Software Development Company
Clutch 2026 โ€” Top Artificial Intelligence Company in Boston
techreviewer.co 2026 โ€” Top Software Development Companies
GoodFirms โ€” Top AI Development Company
Clutch 2026 โ€” Top .NET Developers in Boston
techreviewer.co 2026 โ€” Top AI Integration Companies
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Responsive Design Development 2025
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Frequently asked questions

Simple online stores typically start at $25,000. Complex marketplaces and B2B portals can exceed $1,000,000. We provide a precise estimate after a free assessment of project requirements. The price of eCommerce website development depends on the scope, integrations, and design.

Let's start

What's next
1. Tell us your vision
2. Expert discovery session
3. Receive your custom roadmap
4. Launch your project
If you have any questions, email us info@nexterse.com

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Account manager
Alex Morgan
Account Manager
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