Custom software development for your company

Web applications, APIs, integrations, and platforms designed to solve real business problems in Spain

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Why custom software development?

Generic tools rarely fit the unique processes of your company. Custom software development allows you to automate specific workflows, connect systems that don't communicate with each other, and scale without relying on the limitations of standard software.

At Megasoluciones, we design and build solutions from scratch or on existing platforms: client portals, internal dashboards, banking integrations, ERP-CRM synchronization, and documented REST APIs. We work with companies throughout Spain, with agile teams and deliveries every two weeks.

What we develop

Custom web applications

Client portals, intranets, admin panels, and SaaS platforms with React, Vue, or server-side interfaces depending on the project.

APIs and integrations

We connect Odoo, Salesforce, Google Workspace, payment gateways, and banking APIs. Bidirectional synchronization in real-time or batch.

System modernization

Legacy application migration, database refactoring, and deployment in Docker/cloud with CI/CD.

MVP and digital products

From idea to MVP in 6–10 weeks. Market validation with minimum viable functionality and evolutionary roadmap.

Our development process

1

Discovery

We analyze requirements, current systems, and business objectives. We define scope and budget by phases.

2

Technical design

Architecture, technology stack, data models, and integration plan. Documentation shared with you.

3

Agile development

2-week sprints with functional demos. Continuous feedback and priority adjustments.

4

Delivery and support

Testing, production deployment, training, and maintenance plan with agreed SLA.

Technology stack

We select technologies according to the project, prioritizing maintainability and available talent in Spain:

  • Backend: Python (Flask, FastAPI, Django), Node.js
  • Frontend: React, Vue.js, TypeScript, responsive HTML/CSS
  • Databases: PostgreSQL, MongoDB, Redis
  • Infrastructure: Docker, AWS, Azure, dedicated servers
  • Integrations: REST, GraphQL, webhooks, Odoo XML-RPC, OAuth2

Types of project and indicative budget

From 5.000€ depending on complexity. Typical projects:

  • Corporate website with CMS and forms: from €5,000
  • Client portal with login and panel: from €12,000
  • ERP + CRM + billing integration: from €8,000
  • Multi-tenant SaaS platform: from €30,000

Do you also need to automate processes in addition to development? We combine both services to maximize ROI. Check out our success stories, read why business AI needs developers or how much does a custom development cost.

Resources on development and AI in companies

AI Agency Madrid and regional commitment

What drives the Community of Madrid in AI and what it means for Madrid SMEs.

Developers and AI in companies

Why a domestic model does not replace integrations, automation, and production software.

How much does a custom development cost

Budget ranges by type of project in Spain (2026).

Choosing a development company

Checklist of 8 criteria before hiring.

Frequently asked questions about software development

How much does custom software development cost in Spain?

It depends on the scope. Web projects or simple integrations usually start at €5,000. Complex platforms with multiple modules start from higher amounts depending on functionality. After an initial consultation, we provide a fixed budget by phases.

What technologies do you use for development?

We work with Python (Flask, FastAPI, Django), JavaScript/TypeScript (React, Vue, Node.js), PostgreSQL and MongoDB databases, and deployment on Docker, AWS, or Azure depending on the project's needs.

How long does a custom development project take?

An MVP can be ready in 6–10 weeks. Complete enterprise projects usually require 3–6 months. We use agile methodology with partial deliveries every 2 weeks.

Do you offer maintenance after delivery?

Yes. All projects include a post-launch warranty period. We also offer monthly maintenance plans with SLA, security updates, and evolutive maintenance.

Can you integrate the software with our current systems?

Yes. It is one of our focuses: we connect ERPs (Odoo, SAP), CRMs, payment gateways, third-party APIs, and legacy databases through robust and documented integrations.

Do you have a development project in mind?

We respond to you in less than 24 hours with an initial proposal

Request development quote