Custom software · Piar Concept
Custom SaaS development to turn your idea into a product.
We help you define and build a custom SaaS product: the problem it solves, its first useful version and the architecture connecting users, data and business rules. We also work on existing products that need to evolve.
Who this is for
For B2B founders and product teams with an identified problem, users to validate with and a need for their own technical foundation.
Does this sound familiar?
- You understand the problem, but the feature list does not define a viable first version.
- A prototype validates an idea but leaves permissions, multiple customers’ data or administration unresolved.
- Your product is already running and each integration or new feature is becoming harder to add.
What the service covers
Scope is agreed with your team before work begins.
MVP scope
We define users, the core journey and acceptance criteria. We prioritise what will test a specific hypothesis and make exclusions explicit.
Architecture and data model
We model organisations, users and business entities. If customers share a platform, we define isolation, permissions and responsibilities between modules.
Product and administration
Product interface, access, roles and a backoffice to operate the service. Where subscriptions are needed, we define plans, payments and events with the selected provider.
Integrations and evolution
API contracts, external connections and observability requirements. We prepare documentation and a sequence of improvements based on actual product use.
How we work
- 01
Define the first product decision
We review the problem, current alternatives and the user who will try the solution. Initial scope starts with a complete journey rather than an open-ended feature list.
- 02
Build and review increments
We develop working versions and review them with your team. We test rules, permissions and connections along critical journeys before expanding the product.
- 03
Prepare operations and the next stage
We agree deployment, error monitoring and operational responsibilities. Subsequent decisions follow feedback and observed needs.
Architecture should serve the product’s stage.
A prototype can help validate demand before investing in a complete platform. Your own SaaS makes sense when you need control over rules, data and experience. Not every product needs multitenancy, microservices or complex infrastructure from day one: we decide based on real scope and constraints.
Related experience
Project contributions that demonstrate capabilities relevant to this service.
ISDIN
Contributions to ecommerce and systems
Contributions to a custom ecommerce platform and its backend, including Salesforce and SAP integrations. Work also covered software for the Passeig de Gràcia showroom, facade layers and multi-tenant architecture for different countries.
Explore the contribution: ISDINAmphora Logistics
Features, integrations and landing pages
Contributions to features and integrations connecting Amphora Logistics systems, alongside the development of different versions of its landing pages.
Explore the contribution: Amphora LogisticsFrequently asked questions
- Can you help if I do not have a technical specification yet?
- Yes. We can start by defining users, rules, data and the core journey. We need to understand the problem and how you will validate the solution; technical definition is part of the work before development.
- Can you build SaaS for multiple companies on one platform?
- We can design a multi-tenant architecture where it fits the product. We define how data and permissions are separated between organisations, which configuration they share and which boundaries each customer needs.
- Can you continue development of an existing SaaS?
- We review its architecture, code, integrations and deployment process to agree an evolution plan. Depending on the system, we may extend existing modules, refactor specific parts or plan a gradual migration.
- How much does a SaaS MVP cost?
- It depends on journeys, roles, business rules, integrations and operational requirements. After a definition phase, we can propose scope, acceptance criteria and a budget. Maintenance and ongoing development are agreed around the product’s needs.
Define the SaaS worth building.
Tell us who will use it, what problem it solves and where you are now. We can start with product definition or review the technical foundation you already have.
Other needs we can help with
A website with a backoffice built around your business.
We design and build custom websites connected to an administration panel. Your team can manage content, users and processes from a shared foundation, with clear permissions and a public website people can discover.
Explore the service: A website with a backoffice built around your business.Systems integration that connects your business data.
We connect applications, CRM, ERP and platforms through APIs and webhooks. We design how information moves, which system owns each record and how to recover an operation when something fails.
Explore the service: Systems integration that connects your business data.Custom internal tools for the way your business works.
We build internal software to organise data, tasks, permissions and approvals. A shared interface helps your team follow each process and see what needs attention.
Explore the service: Custom internal tools for the way your business works.Software architecture to move your existing platform forward.
We review existing platforms to understand what makes them difficult to change and what should be addressed first. We map data, modules, permissions and integrations, then propose a technical plan your team can implement in stages.
Explore the service: Software architecture to move your existing platform forward.