SaaS Development Services

Our SaaS Development Services cover the full lifecycle of designing, developing, deploying, and maintaining cloud-based applications – built to integrate smoothly with existing systems, engage users effectively, and support scalable customer-facing operations.

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Scope of SaaS Application Development Services We Offer

We provide full cycle SaaS development – from initial idea validation to deployment and scaling, helping businesses launch reliable and secure, cloud-native software.

Custom SaaS Development

Develop multi-tenant SaaS applications designed for performance, scalability, and long-term maintainability. Solutions are tailored to your specific business logic, user roles, and operational workflows.

SaaS Consulting

Our experts provide guidance on SaaS product strategy, technical architecture, and scaling models. Engagements focus on aligning platform design with business objectives and cloud-native best practices.

SaaS Architecture Design

We design SaaS with clear data flows, robust isolation, and built-in CI/CD, and observability, so you can onboard new tenants effortlessly while keeping their data isolated and costs predictable.

SaaS Cloud Migration

Legacy systems are assessed, re-architected, and transitioned to modern SaaS platforms using proven cloud adoption frameworks and migration strategies, while minimizing disruption and aligning with long-term product goals.

API Development and Integration

Our SaaS solutions experts build secure, well-documented APIs and handle third-party integrations to ensure interoperability, modularity, and smooth communication between components within the SaaS ecosystem.

Support and Maintenance

Continuous monitoring, performance optimization, and regular updates ensure operational efficiency, which contributes to revenue growth, supports ESG goals, and minimizes business and technical risks in the long term.

How Can You Benefit from SaaS Development

Choosing SaaS development unlocks the next strategic advantages for businesses building modern, cloud-based products that create a strong foundation for sustainable growth and efficient, service-oriented operations.

Effortless Scalability to Match Business Growth

Quickly adjust resources as demand increases without disrupting performance. SaaS application development solutions are built to scale seamlessly with your user base.

Cost-Effective Development

Reduce upfront costs with cloud-based tools and a scalable architecture that supports a subscription-based model that generates revenue while aligning costs with actual usage.

Smooth Integration with Third-Party Systems

Easily connect your SaaS product with other tools and platforms. Built-in integration capabilities ensure compatibility with your existing ecosystem.

Built-In Security and Compliance Readiness

Built with security in mind, SaaS platforms include encryption and access control that help protect sensitive data and meet regulatory requirements.

Start Building a Scalable SaaS

We help companies build secure, cloud-native applications with speed and confidence.

Get SaaS Consultation

Featured SaaS Solutions Case Studies

Explore practical implementations of SaaS solutions we've delivered.

Building SaaS Banking Platform

Discover how we helped the client to accelerate its development while enhancing flexibility and scalability in building their SaaS.

USA
FinTech
Full-Cycle Development

Database Migration to AWS Aurora for EdTech SaaS

Unveil how we led the database migration to Amazon Aurora, resulting in a reliable, scalable, and resource-efficient system.

UK
EdTech
AWS Migration

Building a Decoupled Architecture for EdTech SaaS

Discover how we decoupled the application architecture, facilitating further scalability, elasticity, and cost-efficiency of the system.

UK
EdTech
Application Modernization

AWS Infrastructure Monitoring Services for SaaS

Learn how we developed a serverless monitoring solution that ensured continuous app scaling and maintained its consistent performance.

USA
HealthTech
DevOps Services

Our Value as a SaaS Development Company

Organizations choose us for our structured development process, technical clarity, and commitment to SaaS product reliability and performance.

Service Depth

We cover the end-to-end development ensuring continuity and technical alignment at every stage.

Time to Business Impact

Agile delivery and SaaS-ready frameworks let you launch faster and start driving impact sooner.

Cost-efficiency

We design scalable, maintainable SaaS solutions that optimize long-term costs.

SaaS Development for Diverse Business Domains

We build products for companies across various sectors, with a focus on developing and operating best-in-class SaaS on the cloud. Our approach adapts to the unique workflows and goals of diverse business domains.

Healthcare

We build healthcare solutions that support clinical workflows, patient portals, EHR integration, and telemedicine. Emphasis is placed on data privacy, interoperability, and adherence to strict regulatory frameworks like HIPAA.

Edtech

Our platforms for education enable interactive learning experiences, progress tracking, and content management at scale. From K-12 tools to corporate training portals, we focus on usability, accessibility, and performance under peak loads.

Fintech

We develop financial SaaS platforms that handle real-time transactions, fraud detection, and regulatory reporting, designed for precision, auditability, and secure handling of sensitive financial data.

Ecommerce

For retail and marketplace businesses, we deliver solutions that manage product catalogs, dynamic pricing, checkout flows, and fulfillment logistics – all optimized for performance, conversion, and third-party integration.

Biotech

SaaS systems for biotech capture lab data, automate experimental workflows, and ensure traceability. These systems are tailored for collaboration between researchers while supporting compliance with scientific and data standards.

Adtech

We build systems that support campaign management, ad delivery, and audience analytics, engineered for high-volume data ingestion, low-latency decisioning, and integration with ad exchanges and DSPs.

Clients' Reviews on Our Software Development Services

Romexsoft successfully delivered the therapy system. Its overall functionalities provided the company an advantage over its competitors. The team exercised competence, meticulous approach to Agile development and responsiveness throughout the development phase. The success of the product speaks for itself. We are far ahead of our competition in terms of features, usability, and overall strategic direction.

Gennady Gandelman

CEO at Pragma-IT

Romexsoft has been a strategic and essential partner to Omnyfy's ability to realise our Cloud Vision. Romexsoft helped us in multiple strategic projects including IaaS automation, programmatic provisioning of complex multi-tiered infrastructure taxonomy to support Omnyfy's PaaS deployments. I highly recommend Romexsoft. They have been extremely professional, knowledgeable and responsive to our needs.

Fabian Rebeiro

CEO at Omnyfy

I cannot fault Romexsoft's service. They are experts on AWS and offer advice and support 24/7. They are always available to answer any queries and if we have a problem they will resolve in swiftly. They are also a great team of people and I enjoy our weekly meetings. Since Romexsoft have managed and maintained our infrastructure, problems with our system are very rare.

Kevin Lanzon

Engineering Manager at Healthera

We've been working with Romexsoft for nearly a year now; we engaged them to assist in the migration of multiple PWS microservices to AWS and continue to leverage their skills to operate and extend those environments. Their code skills are fantastic and their communications, best represented by the weekly standups, are exemplary. I cannot recommend them highly enough.

Jon Labrie

CTO at Greenfence

Gorgany is an outdoor company. Our customers were struggling with low speed of our website, Romexsoft successfully delivered smooth apps and data migration form OVH to AWS under a tight timeframe and within budget. We received positive feedback from our customers. Working with Romexsoft has been a great experience. It was big pleasure to work with professionals

Oleksandr Hlavatskyy

CIO at Gorgany

Romexsoft has built a skilled and proactive team for SavvyMoney, eager to propose new solutions and hire expertise when needed. They have very good developers. The Romexsoft team is fairly well versed in English, both written and spoken. We haven't had the same problem with them as with other vendors. It’s a pleasure to work with Romexsoft, and I would highly recommend them.

Bhavna Guglani

VP of Product at SavvyMoney

Our company's ability to deliver sophisticated cloud-based solutions for the healthcare industry would be compromised without Romexsoft's superbly skilled engineers. Whether it’s a complex development project or streamlining DevOps, we count on their expertise and are yet to see them skip a beat. As they have been for years of our relationship, they continue to provide the answers to our evolving needs.

Gennady Gandelman

CEO at Pragma-IT

Romexsoft's team is essential to the product's success. Not only have they kept development costs in check, but they've also managed to scale the solution substantially, onboarding a few key clients in the process. Their developers are equally personable and capable. We have found a team of devoted people who care about their clients and are very attentive to our needs.

Oren Liberman

CPO at Trinity Audio

Our experience working with Romexsoft's automation QA team has been extremely positive. What's equally impressive is their professionalism and ability to quickly grasp complex business logic. As a result, they've been able to efficiently identify consequential test cases, develop well-structured test scripts and implement them within a scalable framework that included integration with our CI/CD pipeline.

Gennady Gandelman

CEO at Pragma-IT

The system introduced by Romexsoft was significantly cheaper than the client's previous third-party alternative. The team was responsive, easy to work with, and facilitated direct calls for the project's progress. The team is very knowledgeable and quick to acquire answers if further research is required. They were very efficient in handing over the project upon completion. They are also proactive in recommending/identifying infrastructure problem spots and potential cost reductions.

Daniel O'Reilly

LearnCube LearnCube

We've been very pleased with the quality and reliability of the 24/7 Infrastructure Support. Romexsoft team has been consistently responsive, and it’s been reassuring knowing we can rely on them during both routine operations and urgent situations. The DevOps team in particular has shown strong technical expertise and a proactive attitude, which has made a noticeable impact on our operations.

Scott Montreuil

Head of DevOps Darwin CX

Engagement Models for SaaS Development

Romexsoft offers two flexible collaboration options customized for your organizational structure, project scope, and in-house resource capabilities.

Dedicated Team

A long-term, fully integrated team that focuses exclusively on your SaaS product. This model ensures consistency, rapid iteration, and full alignment with service-level goals, which is ideal for building and scaling complex, multi-tenant platforms.

IT Staff Augmentation

A flexible way to extend your existing team with specialized SaaS expertise. The model supports faster delivery of critical features, accelerates cloud-native adoption, and helps address technical gaps without disrupting your internal structure.

Technologies Powering Our SaaS Solutions

Programming Languages and Frameworks

React.js

Angular

Vue.js

Node.js

Django

Ruby on Rails

PHP

Databases

PostgreSQL

MongoDB

MySQL

Simple Storage Service (S3)

Amazon Redshift

Amazon DynamoDB

Amazon DocumentDB

Amazon RDS

DevOps and Automation

Docker

Kubernetes

Jenkins

Terraform

Chef

Ansible

Puppet

Saltstack

How We Build SaaS Applications

Building a successful SaaS application takes a structured, reliable customer-centric approach. At Romexsoft, we ensure every solution is scalable, secure, and maintainable from the ground up. Our process centers on clear communication, close collaboration, and consistent code quality. This way, we help reduce risks and deliver long-term value.

Ideation and Validation

The SaaS journey begins with a business-first approach: defining the target customer, desired service experience, and long-term operational goals. This stage focuses on validating the service model – not just the feature set – through market analysis, customer interviews, and rapid prototyping. Critical elements such as onboarding flow, time to first value, and monetization strategy are addressed early to ensure the offering is service-ready from the outset.

Planning and Design

Product planning integrates service experience attributes (e.g., self-service onboarding, real-time observability, tenant isolation) directly into the architecture and backlog. Technical decisions at this stage include choosing between silo or pooled tenancy models, addressing tiering strategies, and planning for multi-tenant-aware components like identity, metering, billing, and support telemetry. Product and engineering teams align architecture with operational goals, recognizing that delivering a service means abstracting internal complexity from the customer’s view.

Development and Testing

Then, engineering efforts focus on building a robust, multi-tenant architecture that supports configurability, operational efficiency, and tenant isolation. Shared services such as authentication, metering, and billing are integrated from the outset to enable consistent service delivery. Testing strategies extend beyond functionality to cover scalability, tenant-specific behavior, throttling limits, and fault isolation. Continuous integration pipelines are established to support frequent deployments, with automated tests validating both core features and service-level guarantees across tenants. The goal is to create a reliable foundation for rapid iteration while maintaining a seamless and consistent experience for every user segment.

Deployment and Launch

Launch readiness in a SaaS context goes beyond a functional release. It requires automated provisioning, tenant registration, and integration with operational infrastructure (e.g., observability, alerts, incident response). Feature flags, progressive rollout strategies, and safe deployments are used to minimize risk across tenants. Initial launches are designed to simulate the full SaaS experience, even if architectural modernization is still in progress – emphasizing perception of service over structural completeness.

Monitoring and Maintenance

Post-launch operations focus on continuous delivery of value, not just bug fixes. Real-time metrics, SLA adherence, tenant health scoring, and customer usage insights drive iterative improvements. Shared operational capabilities, such as usage analytics, billing systems, and identity management, support all tenants and are centrally maintained by platform, engineering, and product teams. These teams evolve to sustain both product functionality and the broader service delivery model, prioritizing observability, operational efficiency, and long-term customer retention.

SaaS Product Development Services Q&A

How much does it cost to build a SaaS application?

For a basic, single-module SaaS MVP, development costs usually start at $10,000 – $20,000. Most fully featured, custom SaaS products fall between $50,000 and $150,000, while large-scale, enterprise-grade platforms with advanced analytics, multi-tenancy, or strict compliance can even exceed $1 000 000.

The exact figure depends on scope, feature depth, tech stack, and the location and seniority of the development team, and you should also budget an additional 15–25% per year for hosting, support, and continuous updates.

How long does it take to build a SaaS application?

A basic SaaS MVP can be ready in 3-6 months, while a full-featured product with multiple modules and integrations typically needs 9-18 months. If the solution is highly complex or enterprise-grade – requiring advanced analytics, strict compliance, or extensive scalability – it may take 18 months or more to reach production.

Do you provide ongoing support and maintenance for the SaaS solutions?

Yes, Romexsoft can deliver complex support and maintenance for all SaaS solutions we develop. Our dedicated team handles timely bug fixes, system updates, performance optimization, and continuous monitoring – backed by 24/7 DevOps support to ensure your application stays secure, stable, and highly available at all times.

What are the fundamental components of a SaaS architecture?

A typical SaaS architecture separates responsibilities into a control plane and an application plane. The control plane hosts global services such as onboarding, authentication, tenant management, operations, and analytics, allowing administrators to manage the entire platform through one unified interface; these services serve every customer but run in their own single-tenant context. The application plan contains the multi-tenant application itself along with its backend services and handles the automated provisioning of each tenant’s resources.