These are the scenarios where founders and SaaS teams most often bring us in, from validating a brand-new idea to taking over and scaling an established platform.
Many founders come to us with an idea for a SaaS product but have not validated demand. We help turn vague ideas into specific product flows. We create mockups, clickable prototypes, or lightweight MVP builds. We guide founders to test with real potential users before scaling. This reduces wasted capital and prevents overbuilding.
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.
SaaS Mobile App Modernization
One mobile app we worked on was built on older technology and needed to be modernized so it would continue working with the customer's primary SaaS backend. We upgraded and stabilized the mobile application, ensured compatibility with their server architecture, and restored deployment reliability. We modernized the legacy mobile technology stack, restored compatibility with the updated SaaS backend, stabilized the build and deployment pipelines, and ensured long term maintainability.
This project demonstrates our ability to support SaaS companies that need modernization rather than new greenfield development.
Sembit modernized and stabilized customer's Android mobile app, upgrading outdated libraries, resolving build issues, and restoring a clean, deployable build, on time and on budget.
MCN: A SaaS Platform Takeover and Progressive Rewrite
MCN came to us with an existing online education SaaS platform that had been live for two years. This was the third version of their web application, and they wanted a reliable engineering partner to stabilize, extend, and modernize the system.
We stepped in as their outsourced technical team and gradually rewrote 80 to 90 percent of the application while maintaining uptime. We also served as second-level technical support, investigating user edge cases and implementing analytics dashboards for internal decision making. Over time, we helped them build administrative analytics dashboards, segmentation tools for marketing and outreach, email templating and broadcast systems, and internal automation tools to streamline customer service.
This demonstrates how we support an existing SaaS business and act as a long-term product partner.
Ruby Receptionists: Expanding SaaS into Mobile
Ruby Receptionists had an established SaaS product in the answering service space. They had strong internal web development expertise but needed help launching a mobile application when the iPhone was still new.
We built their mobile app from scratch, created synchronization logic between the app and their server, and integrated it cleanly into their existing architecture. We delivered a native mobile application tied to the SaaS backend, designed a secure synchronization architecture, extended the existing SaaS platform into a mobile channel, and delivered new customer-facing value without rebuilding core systems.
This is a classic example of expanding a successful SaaS product into new channels.
Why Sembit?
Projects completed
Years in business
Average Years Experience per Employee
We are based in Oregon and work directly with founders, CTOs, and product teams across the United States. Unlike many outsourced development shops, we do not simply accept a specification and build blindly. We ask the hard business questions, we challenge assumptions, and we help narrow scope. If your idea is too large for an MVP, we will tell you. If your feature list is bloated, we will help you reduce it. If your monetization strategy is unclear, we will push for clarity before engineering begins. For established SaaS companies, we offer something rare: senior engineers who can take over a live system, stabilize it, extend it, and support it without requiring a monthly retainer fee. We track time to the minute and provide support when you need it.
Tell us more about your custom SaaS development needs.
We can help.
Get expert guidance from Nathan Theophanes (Sembit's President) and Shaun Davidson (Sembit's VP) regarding your SaaS project. We'll be in touch in hours, not days.
Most SaaS platforms require secure multi-tenant architecture that allows multiple customers to operate within the same system while keeping data fully isolated. We design scalable database structures that separate tenants cleanly and prevent cross-account exposure. Subscription management, plan tiers, billing logic, and usage limits are built directly into the application architecture. Whether integrating with Stripe or building custom billing rules, we ensure subscription models are technically sound and easy to evolve. This foundation allows SaaS companies to grow without rebuilding their core system.
SaaS companies live and die by metrics such as churn rate, engagement frequency, and customer acquisition cost. We build internal analytics dashboards that allow product teams to slice and dice data across cohorts, time periods, and user segments. In our project for MCN, we created administrative tools that compare usage across previous years and surface actionable insights. These dashboards often become central to growth strategy. Strong analytics infrastructure transforms a SaaS product from a static tool into a measurable business engine.
Many SaaS platforms require sophisticated communication workflows to retain users and increase engagement. We build segmentation tools that allow teams to filter users by behavior, program, activity level, or subscription type. From there, we implement templated email systems and automated triggers tied to user actions. In some cases, we replace expensive third-party email providers with in-house systems to eliminate per-user costs. This creates tighter integration between product usage and customer communication.
As SaaS platforms scale, enterprise clients often request white labeling capabilities. We build configurable branding systems that allow logos, domains, and visual identity to be customized per client. Permission layers and account hierarchies are designed to support enterprise structures. This enables B2B2C models where larger organizations resell or deploy your platform as their own. White labeling increases revenue potential without duplicating infrastructure.
Many SaaS companies expand into mobile once product-market fit is established. We build native mobile applications that synchronize securely with existing SaaS backends and APIs. This includes authentication systems, real-time data syncing, and notification pipelines. For companies like Ruby Receptionists, mobile integration expanded product value without requiring a backend rewrite. Proper architecture ensures mobile extensions strengthen the SaaS platform rather than fragment it.
SaaS products evolve over time, and early architecture decisions often need refinement. We take over live systems and progressively refactor large portions of the codebase without disrupting production. In some projects, we have rewritten the majority of a platform while maintaining full uptime and customer access. This approach avoids risky full rewrites and protects recurring revenue. Incremental modernization is often the most practical path forward for scaling SaaS companies.
FAQs About Our Custom SaaS Development Services
We strongly encourage validating your idea before building a full platform. That may involve mockups, simple prototypes, or even AI-generated web pages. The goal is to test market interest and willingness to pay. We help you narrow the idea to its smallest viable form before committing to a development budget.
Yes. For companies like MCN, we act as their primary technical partner. We provide development, support, analytics, and ongoing improvements without requiring a full in-house engineering team.
We do not simply build what is requested. We ask business-level questions, challenge scope, and help refine your product strategy. Our goal is not just to ship software, but to help you build a sustainable SaaS business.
No. We often work with established SaaS companies that need modernization, feature expansion, or mobile app development. In many cases, we plug into an existing architecture and extend it safely.
Yes. We frequently inherit systems built by other teams. We stabilize the platform, refactor weak areas, improve architecture, and provide structured long-term support.
No. We bill based on actual time used. Many SaaS clients appreciate that they only pay for what they need rather than maintaining a fixed monthly retainer.
Yes. We build configurable branding systems that allow enterprise clients to resell or deploy your SaaS platform under their own identity.
Absolutely. We build internal dashboards, segmentation systems, churn tracking, and email automation features so you can better understand user behavior and retention patterns.
