Faster time to market
We start with an MVP focused on core value. Get your product in front of users sooner and validate the business model before a large investment.
SaaS and product development from idea to paying customers
Opus Online, a software development company in Tallinn, Estonia, helps build SaaS products and web applications from the first prototype to a scalable platform. For example, we have been the development and design partner of the training platform Coursy from day one.
Let’s talk about how to get your product to market faster.
- 15+years of software development
- 25+specialists on the team
- 120+completed projects
- ISO 27001certified information security
Why build with us?
Architecture that scales
Multi-tenant architecture, microservices and cloud infrastructure. The product handles 10 users and 10,000 without rebuilding everything.
Product management and development in one place
We bring product management, UX design and engineering together. One partner for the full lifecycle, not five different vendors.
What we build in SaaS products
Authentication and user roles
Sign-up, login, SSO, two-factor authentication and role-based access. Every user sees only what they need to.
Multi-tenant architecture
A single codebase serves all customers, but each customer’s data is isolated. Adding a new customer requires no separate setup.
Payments and subscriptions
Stripe, monthly billing, trial periods, plan switching and invoicing. Customers manage their own subscription.
Dashboards and analytics
Dashboards, charts and reports that give users insight into their data. Usage statistics and business metrics for administrators.
API and integrations
REST or GraphQL API, webhooks and third-party connections. Your product becomes part of the ecosystem, not an isolated island.
Infrastructure and DevOps
Cloud infrastructure, CI/CD, auto-scaling and monitoring. The product stays up and responds to load automatically.
From MVP to a scalable product
SaaS product development starts with business model validation. We build an MVP first – a minimum viable product with only the features early users actually need. This gets you feedback faster and avoids months of building in the wrong direction.
After validation we extend the product step by step: adding features, improving UX and strengthening the architecture as load grows. The result is a product that generates revenue and is easy to develop further.
For example, we have developed the training platform Coursy from the very start: backend systems, admin interfaces and the user interface, as well as the brand and illustrations. The platform assigns employees to the right courses automatically by job role and organisational unit.
Technologies
Next.js is a React framework for fast websites, headless online stores and portals that are easy to find in Google.
React is the world's most widely used library for user interfaces, behind fast web apps, portals and self-service environments.
Node.js is server-side JavaScript we use to build fast backends, APIs, integrations and applications that scale well.
Completed projects
We have extensive experience in developing IT software and e-commerce solutions for businesses, spanning from the financial sector to insurance and pharmaceutical industries. We serve as a long-term partner for both large corporations and rapidly growing startups.
How we build a product
You communicate directly with the people who build your solution, not intermediaries.
Discovery and planning
Business model, target audience, core features and technical architecture. We define what the MVP includes.
UX and prototype
User journeys and a clickable prototype you can test before development starts.
MVP development
Core features, authentication and payment integration. First version in front of users.
Feedback and iteration
Improvements based on usage data and feedback. Fast cycles, measurable results.
Growth and scaling
Performance optimisation, new features and integrations as demand grows.
Maintenance and support
Monitoring, security updates, SLA and continuous development.
Frequently asked questions
How much does MVP development cost?
MVP cost depends on the scope, but typically falls in the range of €15,000–50,000. We provide an accurate estimate after the discovery and planning phase, where we define what the MVP includes.
How long does it take to get an MVP to market?
A typical MVP is ready in 2–4 months. Our goal is to get a working product in front of users as quickly as possible to validate the business model.
Can you further develop an existing product?
Yes. We start with a code audit, evaluate the architecture and propose a plan – whether that means performance improvements, new features or platform migration.
How do payments and subscriptions work?
We integrate Stripe or another payment provider. Users can choose a plan, start a trial, switch plans and manage their payment details. Billing runs automatically.
Will the product handle growth?
Yes. We build scalable architecture from day one: multi-tenant database, cloud infrastructure and auto-scaling. As the number of users grows, so does the infrastructure.
Who owns the code and intellectual property?
You do. All source code, design files and documentation belong to you. We hand over all assets and you can continue development at any time, on your own or with another partner.
Get in touch
We have your back when it comes to web development, giving you the freedom to focus on building and growing your company.
