Herramienta interna
Best for: Dashboard simple, CRUD o panel admin a medida (1-2 semanas)
3500€/project
- Stack SPA a medida (Angular, React o Vue)
- Backend con API documentada
- Base de datos y autenticación básica
- Despliegue en producción
Service
Web applications with Angular, React or Vue
When WordPress falls short: SPAs, dashboards, SaaS platforms, custom integrations. Code that scales and is maintainable.
When you need a web app (and when you do not)
WordPress covers 80% of web needs: corporate sites, blogs, small/medium e-commerce, landings. But there is a 20% where WordPress is the wrong tool: dashboards with real-time data, platforms with complex roles, deep integrations with your stack, SaaS applications with subscriptions and multi-tenancy.
For that, SPA frameworks (Angular, React, Vue) and modern backends (Node, Python, Go) exist. The difference is not technical, it is about the problem: if your product has flows that change per user, if you need a robust backend with documented API, if the business logic does not fit in a plugin, you need a web application.
At Sincronia Agency we have been building web applications since 2017, with main focus on Angular (our house framework) but also React and Vue when the project calls for it. We help you decide whether your project needs an app or is solved with WordPress. If it is an app, we build it with criteria: clean architecture, tests, CI/CD, code another team can maintain when we are gone.
What the development includes
Bespoke modern stack
Angular (our strength), React or Vue for the frontend. Node, Python or Go for the backend. PostgreSQL or MongoDB for data. We choose based on the project.
REST or GraphQL API
Backend with documented API (OpenAPI/Swagger), robust authentication (JWT, OAuth, SSO), access control by roles and permissions.
SPA frontend with optional SSR
Single Page Application with SSR (Server-Side Rendering) when SEO matters, or pure CSR for internal tools.
Bespoke integrations
We connect your app with ERPs, CRMs, payment gateways, email services, third-party APIs. We make your stack talk to each other.
CI/CD and automated deploy
Continuous integration pipelines with automated tests. Deploy to Cloudflare Pages, Vercel, AWS, or your on-premise infrastructure.
Automated tests
Unit, integration and end-to-end tests. Your team can refactor without fear of breaking anything.
Monitoring and observability
Structured logs, usage metrics, alerts. You know what happens in production without having to log into the server.
Technical documentation
Architecture documentation, onboarding for new developers, flow diagrams. Your team can continue without us.
How we work a web app
- 01
Technical analysis
Meeting to understand user flows, required integrations and technical goals. We define stack, architecture and phases.
- 02
Architecture and prototyping
We design the architecture: data model, API endpoints, frontend component structure. Navigable prototype to validate UX before coding.
- 03
Iterative development
2-week sprints with demos. Each sprint delivers testable, deployable functionality to staging.
- 04
QA, security and deploy
Security tests, audits, performance optimisation. Deploy to production with monitoring and alerts configured.
Price and payment terms
From €3,500 per project. Three tiers by scope: internal tool, MVP or full SaaS platform. Each project is quoted based on scope after technical analysis. Payment by milestones. For long projects, we also work on monthly retainer with guaranteed hours.
SPAs, dashboards, SaaS platforms with Angular, React or Vue. From €3,500.
MVP
Best for: Producto con auth, roles, API completa y base de datos real (1-2 meses)
8000€/project
- Stack SPA a medida (Angular, React o Vue)
- Backend robusto con API REST o GraphQL
- Autenticación con JWT, OAuth o SSO
- Roles, permisos y panel de administración
- CI/CD, tests y monitorización
Plataforma SaaS
Best for: Multi-tenancy, suscripciones, integraciones y escalado (3-6 meses)
15000€/project
- Arquitectura multi-tenant
- Suscripciones y pasarela de pago
- Integraciones a medida (ERP, CRM, APIs)
- SSR, SEO técnico y rendimiento optimizado
- CI/CD, tests E2E y monitorización 24/7
- Documentación técnica completa
Frequently asked questions
Angular, React or Vue? Which should I use?
Depends on the project. Angular is our home for large team-scale apps: opinionated, maintainable, scalable. React is more flexible with a bigger ecosystem. Vue is the balance. We recommend in technical analysis.
How much does a web app cost?
Internal tools: from €3,500. MVPs: from €8,000. Complete SaaS platforms: from €15,000+. We give a fixed quote after analysis.
Can you maintain the app after launch?
Yes, we have maintenance plans for web apps: monitoring, updates, new features by sprint or retainer.
What if I already have a legacy app that needs modernising?
We do progressive migrations: wrap the old app, modernise by modules, no big-bang rewrites that take 2 years and deliver nothing.
How long does a web app project take?
A functional MVP: 2-3 months. A complete SaaS platform: 4-8 months. We confirm in analysis.
Can you work with my internal team?
Of course. We do pair programming, code reviews, training. If you have a team, we complement them; if not, we go alone.
Got an app idea?
Let us talk 30 minutes and see if your project is for Angular/React or if WordPress already covers it.