We design and build custom e-commerce platforms and integrations that go beyond off-the-shelf storefronts, from headless commerce and subscription billing to inventory, fulfillment, and ERP connections. Whether you are launching a new store, scaling a growing catalog, or replacing a system you have outgrown, we deliver fast, secure shopping experiences that connect cleanly to the rest of your business.
Customer Reviews
I was astonished that, in such a short period of time, something that other companies had taken months to understand, this company was able to execute. Since then, we have never looked anywhere else. I would never consider another company. This is how much we believe in them.
The other agencies we looked at, frankly, wanted to tell us how great they were. Sembit instead asked a lot of probing questions and provided the kind of consultation that really made us comfortable in hiring them.
It's been excellent every step of the way. The initial conversations were excellent — we had an instant human connection. In addition to being professional, they also had a human touch that's irreplicable.
I've really loved working with them. Sembit always delivers what they say they're going to deliver, in the time they say they'll deliver it. Whenever we have a deadline for a task delivery, the team gives us detailed and frequent updates about their progress. It's been a great partnership.
Sembit's team really took on the mindset of our business which resulted in a better product with thoughtful decisions from developers. We have been able to have healthy discussions about the pros and cons of a design choices which ultimately makes a better product in the long run.
Sembit has over-delivered on their promises at every step of the process. They've come in ahead of schedule and below budget, and they let us know if we are asking for too much. They are clear communicators, and it made a world of difference for our company.
These are the scenarios where online retailers and B2B sellers most often bring us in, from going headless to building subscriptions, integrations, and custom checkout logic an off-the-shelf store can't handle.
Off-the-shelf storefronts work well until your catalog, pricing rules, or customer experience outgrow the template. We build headless and fully custom storefronts that give you complete control over the buying experience while staying fast on every device. This approach lets you tailor the store to the way your customers actually shop instead of bending your business to fit a platform.
Custom E-Commerce and Self-Service Portal
Sembit built a new version of a customer portal for one customer. Ordering and payments include multi-cart shopping, UPS and FedEx freight estimation, credit card authorization and capture, Excel bulk-order uploads, a promotions engine, and an abandoned-cart reminder service, all tied together with real-time price and stock checks against the ERP.
Highlights from this project:
Sembit created an updated custom e-commerce and self-service portal that lets dealers and customers order parts, pay invoices, and generate pro-forma invoices, all integrated in real time with their ERP.
Digital Returns System for Aftermarket Parts
Returns are part of every e-commerce operation, and handling them manually creates friction for customers and staff alike. Sembit added a dedicated RMA and RGA return module to a B2B customer portal. Customers can select purchased products, upload photos, submit requests, and receive confirmations, replacing a manual process with a clear digital workflow. Delivered on time and on budget, the system has remained in active use since its launch in 2017, a reminder that well-built commerce tools keep earning their keep for years.
Highlights from this project:
Sembit built a dedicated RMA/RGA return module, replacing a manual process with a structured digital workflow that has stayed in active use since 2017.
Customized BigCommerce Store Pages
Sembit built a custom page, cart and checkout experience for a company that offers online frames. Customers were able to see a preview of what their frame would look like and get a real-time quote based on the size of the print they wanted framed. To save money, this was built on top of the BigCommerce eStore engine.
Custom Craft Supplies
Sembit maintained and enhanced a custom eCommerce craft supplies store for six years, building backorder automation, optimizing load times, adding flexible promotions, extending admin reporting, managing catalog and picture caching, and extending integration with their primary supplier.
Our Oregon Based E-Commerce Software Team
Projects completed
Years in business
Average Years Experience per Employee
Sembit's Oregon-based team is well-suited for e-commerce work because serious online stores are rarely just a storefront. They are catalogs, pricing rules, inventory feeds, payment flows, fulfillment workflows, and ERP connections that all have to stay in sync. We are comfortable across that whole picture, not just the part the shopper sees.
E-commerce clients also benefit from our long-term support model. A store is a living system that needs steady attention as catalogs grow, payment requirements change, and new product lines come online. Clients appreciate working with a stable group of experienced developers who learn their business and respond quickly when something needs to change.
That matters in commerce, where a software problem becomes a revenue problem fast. If checkout breaks, prices fall out of sync, or the store cannot handle a busy day, the business feels it immediately. We help organizations avoid that by staying close to the entire order-to-fulfillment workflow, not just the code.
We are also comfortable connecting stores to the systems that run the rest of the business, including ERPs like IBM BPCS and Oracle, legacy databases, and payment processors. Whether you are launching a new store, scaling a growing one, or replacing a platform you have outgrown, our team can design, build, support, and improve it over time.
Tell us more about your custom e-commerce development needs. We can help.
Get expert guidance from Nathan Theophanes (Sembit's President) and Shaun Davidson (Sembit's VP) regarding your e-commerce project. We'll be in touch in hours, not days.
Stores work best when pricing and availability are always current. We build integrations that pull live data from ERP and inventory systems, with graceful fallback to recent snapshots when a back-end system is briefly offline, so customers always see something accurate.
We build payment flows with credit card authorization and capture and support keeping processing in-house when control and cost matter to you. Security and PCI-conscious handling are designed in from the start, not bolted on later.
We build catalog systems that stay organized at scale, handling thousands of SKUs, product images, diagrams, schematics, and cross-references, including unified catalogs that combine multiple product lines into one shopping experience.
For business customers we build account-based pricing, bulk ordering, credit applications, invoice search and online payment, and user administration with roles and impersonation, so dealers and accounts can serve themselves.
We build structured returns and RMA modules and the fulfillment workflows around them, including freight estimation, order confirmations, and shipping documents, so post-sale handling is as smooth as the sale itself.
Slow stores lose sales. We build for speed and design architectures that handle high order volumes without strain, so the store stays fast on a normal Tuesday and on your busiest day of the year.
Most stores need to talk to other systems: ERPs, CRMs, shipping carriers, payment processors, and internal applications. We build the integration layer that connects your store to the rest of your business so data flows automatically instead of by hand.
Custom Development for E-Commerce FAQs
Yes. When a template platform starts to limit your catalog, pricing, or customer experience, a custom or headless storefront gives you full control. We build the store around the way your customers actually shop instead of forcing your business to fit a platform.
Yes. We have integrated stores directly with ERPs like BPCS and Oracle as well as legacy databases, so pricing and availability stay accurate in real time. As long as the system has an API, SDK, or accessible database, we can connect to it.
Yes. We have built PCI-compliant, in-house credit card processing so clients can control the payment experience and cost rather than handing checkout off entirely to a third party.
Usually, yes. We have migrated stores off legacy platforms onto modern architectures, and we can often do this incrementally so the store keeps selling while the foundation improves underneath it. Full rewrites are rarely necessary.
Absolutely! B2B commerce is a Sembit strength. We build self-service portals with account pricing, bulk ordering, RMAs, invoicing, and dealer hierarchies so your business customers can order and manage accounts without tying up your staff.
Yes. We build structured returns modules where customers select purchased products, upload photos, and submit requests, then receive confirmations, turning a manual process into a clean digital workflow for both customers and your team.
