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Service 03 · Custom Platform

Your business running
on your own code
in weeks.

Complete digital platforms: portals with multi-role login, admin dashboards, databases, realtime chat, payment gateways, API integrations. What a US shop quotes at $25k–$50k and four months, we ship in weeks.

12d.
shortest_real_build
High.
availability · SLA by plan
∞.
scalable
$ quote_platform See a real case →
client.xxdm.io/dashboard
DASHBOARD CLIENTS DOCS CHAT
// ACTIVE FILES
FILE-2026-0341 · M. Hernández ACTIVE
FILE-2026-0342 · L. Ramírez PENDING
FILE-2026-0343 · A. González CLOSED
47
FILES
$2.8M
PIPELINE
12d
AVG_CLOSE
The problem

Your business shouldn't live in WhatsApp.

If more than two of these describe you, you need a Custom Platform. This isn't about "tech for tech's sake" — it's about operational survival.

  • You hunt for a client's file across 1,400 WhatsApp messages.
  • Your team works off spreadsheets on different desktops.
  • You lose leads because no one replied in time.
  • You can't tell what stage each client is in without asking.
  • You bill manually by bank transfer and reconcile from a screenshot.
  • Your system doesn't connect with your CRM, your email, or anything else.
"
We used to run on WhatsApp, spreadsheets and memory. Today we have a portal where every client sees, in real time, what stage their file is in — without calling me.
— Client · Case B · Financial services
Exactly what we build

Six modules that become your operating system.

Every platform is made of these six base modules, configured for your industry. You can start with three and grow into all six, or launch everything in a single build.

01 · AUTHENTICATION
Multi-role login

Access system with email, Google, Apple or magic link. Each user sees only what their role allows: admin, operator, advisor, client, partner. Secure sessions, password recovery, optional MFA.

Supabase AuthOAuthJWTRLS
02 · CLIENT PORTAL
Client portal

Every client enters their own space where they see their information, their documents, their current status, their next steps. Email notifications when something changes. Mobile-first.

ReactPWATailwind
03 · ADMIN DASHBOARD
Control panel

The view you and your team need: real-time KPIs, active clients, alerts, smart search, reports exportable to Excel. Granular permissions by role.

ReactRechartsTanstack
04 · REAL-TIME CHAT
Realtime chat

Direct client-operator communication inside the platform. Attachments, voice notes, photos, "read" receipts, full history. No more messages lost in WhatsApp groups.

Supabase RealtimeWebRTCS3
05 · DOCUMENT VAULT
Document manager

Each client uploads and signs their documents. Automatic validation, version control, expiration, pre-filled templates, full-file export to PDF.

Supabase StoragePDF.jsOCR
06 · INTEGRATIONS
API integrations

We connect your platform to what you already use: Stripe, WhatsApp Business, Google Workspace, SAP, Odoo, CRMs, accounting. No data islands.

RESTWebhooksEdge Functions
Technical anatomy

Built in 4 layers. All yours.

We don't use no-code platforms you can't scale later. Every platform is built in these four layers with open technologies. The code is yours from day one — if tomorrow you want to hire any developer in the world, they can work on it.

Layer 1 — Frontend
END_USER
React + Vite
Interactive interface
Tailwind CSS
Consistent design
PWA
Installable as an app
Responsive
Mobile + desktop
↓ ↓ ↓ ↓
Layer 2 — Backend & logic
PROCESSES
Edge Functions
Serverless logic
FastAPI
Python APIs (opt.)
Resend
Automated emails
Webhooks
Real-time events
↓ ↓ ↓ ↓
Layer 3 — Data & security
SOURCE_OF_TRUTH
PostgreSQL
Database
Row-Level Security
Access by role
S3 Storage
Secure files
Daily backups
Point-in-time
↔ ↔ ↔ ↔
Layer 4 — External integrations
CONNECTORS
Stripe
Cards, ACH, subscriptions
WhatsApp API
Notifications
Google Workspace
Calendar, Drive, Gmail
SAP / Odoo / CRM
Enterprise ERPs
Tech stack

Every tool, chosen on purpose.

These are the technical decisions we make and why. We don't use commercial templates or proprietary builders — every piece is open, maintainable and scalable.

// FRONTEND
React+ Vite + Tailwind
The most mature ecosystem for SPAs. Any developer in the world can maintain it. PWA enabled by default.
// BACKEND_DB
Supabase+ PostgreSQL
Real Postgres, real auth, real RLS, real realtime, real storage — no vendor lock-in. We migrate to self-hosted if it grows.
// LOGIC
FastAPI+ Edge Functions
FastAPI for complex Python logic (calculations, reports, scrapers). Deno Edge Functions for fast integrations.
// PAYMENTS
Stripe+ subscriptions
Stripe for international payments and subscriptions — cards, ACH and recurring billing, all in USD with a single integration.
// INFRA
Netlify+ Cloudflare
Continuous deploy from GitHub. Global CDN, automatic SSL, edge functions. Cloudflare for DNS, security and Workers.
// EMAIL
Resend+ React Email
Transactional email with version-controlled React templates. SPF, DKIM, DMARC configured. Open rate and tracking included.
// MONITORING
Sentry+ Plausible
Sentry for errors and performance. Plausible for cookie-less analytics (GDPR-compliant) and a clean dashboard.
Process · 6 phases

From brief to production in 4–10 weeks.

This is the real process, not a sales pitch. No weekly status meetings. No 80-page proposals. Every phase has tangible deliverables you can touch.

WEEK 1 · DISCOVERY
We understand your business

A deep session with you and your operating team. We map how it works today: roles, flows, tools, real pain points. We come out with a technical scope-and-timeline document.

Phase 01 deliverables
  • Map of current processes
  • Catalog of roles and permissions
  • List of required integrations
  • Signed technical scope document
WEEK 2 · DESIGN
Navigable wireframes

No static PDFs. We build a real navigable prototype (Figma + click-through) where you can log in, navigate, simulate a file, and feel how the platform works before we write a line of code.

Phase 02 deliverables
  • Navigable prototype in Figma
  • Design system (components, colors)
  • Complete flows by role
  • Basic usability testing
WEEKS 2-3 · AUTH & BASE
Technical foundations

We stand up the infrastructure: domain, hosting, database, multi-role auth with Google and Apple, an empty initial dashboard. At this point you can already log in to your real platform, even if it's empty.

Phase 03 deliverables
  • Domain + SSL + hosting configured
  • Working multi-role login
  • Complete database structure
  • Secure environment variables and secrets
WEEKS 3-6 · MODULES
Iterative build

Each week we ship one or two modules to production. You see progress live, not in monthly demos. You use the platform as it's built and tell us what to adjust before we move on.

Phase 04 deliverables
  • Working client portal
  • Admin panel with KPIs
  • Realtime chat
  • Document manager with uploads
WEEKS 6-8 · INTEGRATIONS
We connect the external pieces

Stripe for payments, WhatsApp API for notifications, Google Workspace for email, integrations with the CRMs or ERPs you already use. Exhaustive testing with real data in a staging environment.

Phase 05 deliverables
  • Live payment gateway
  • WhatsApp and email notifications
  • Sync with existing CRM/ERP
  • Internal API documentation
FINAL WEEK · LAUNCH
In production + training

Migration of existing data, team training (8 hours), operating documentation, active monitoring during the first weeks. We leave you with a live product and a team that knows how to use it.

Phase 06 deliverables
  • Platform in production + domain
  • Data migration completed
  • Recorded training for your team
  • Operating manual + access transferred
Real case · B

12 days. A complete financial platform.

A mortgage-advisory firm with 4 advisors and ~40 files in progress. They ran on WhatsApp, Excel and crossed emails. Five months quoted by a US shop. Twelve days with XXDM.

In the first week we mapped their entire process: eight stages a file moves through from intake to close, with specific documents at each stage and different permissions by role.

Over the next 10 days we built the whole platform: a client portal with stage visualization, an advisor panel with a work queue, an admin panel with KPIs, chat with files and voice, an automated bank comparison engine, and transactional emails per stage.

My clients see in real time what stage their file is in without having to message me. My team no longer loses documents. I see the whole pipeline on a single screen.
12d
total build time
8
operating stages
3
distinct roles
~50%
savings vs a US shop
// LIVE_FILE.STATUS
  • 01 · Client profile ● COMPLETE
  • 02 · Personal documents ● COMPLETE
  • 03 · Internal review ● COMPLETE
  • 04 · Bank analysis ▶ IN PROGRESS
  • 05 · Submission to bank ○ PENDING
  • 06 · Bank approval ○ PENDING
  • 07 · Closing paperwork ○ PENDING
  • 08 · Close and handover ○ PENDING
Investment · 3 tiers

Three sizes. Three realities.

A Custom Platform doesn't have a single fixed price because every business is different. These are the three typical ranges our clients fall into — we diagnose which one fits you on a 30-minute call.

Starter
Essential platform
from $24,000
4–6 weeks · 3 modules
  • Basic multi-role auth (2-3 roles)
  • Client portal with status view
  • Admin panel with essential CRUD
  • 1 integration (payments or email)
  • Up to 500 concurrent users
  • 3 months of support included
Most popular
Standard
Complete platform
from $80,000
6–8 weeks · 5 modules
  • Full multi-role auth (4-5 roles)
  • Portal + Admin + realtime chat
  • Document manager with e-signature
  • 3 integrations (payments, email, ERP)
  • Up to 5,000 concurrent users
  • 6 months of support + retainer discount
Enterprise
Fully custom platform
from $150,000
8–16 weeks · 6+ modules
  • Auth with enterprise SSO + MFA
  • 6 full modules + custom
  • SAP / Oracle / custom ERP integrations
  • Compliance: GDPR, US data-privacy, ISO 27001
  • Unlimited users + multi-tenancy
  • Dedicated SLA + 24/7 support
Frequently asked questions

What everyone wants to know.

Yes, and the reason isn't magic — it's that we use a modern stack (Supabase + React + Edge Functions) that eliminates 80% of the work traditional agencies bill for: provisioning servers, writing auth from scratch, standing up a database, coding emails. We've spent years specializing in this exact stack and we have pre-built internal templates. The timeline is real and verifiable in our case studies.
Yes. From day one we work in a GitHub repository you have access to. At the end of the project we transfer full ownership: GitHub, domain, hosting, databases, third-party accounts. If tomorrow you want to hire any developer in the world to maintain it, they can do so without our authorization.
Every tier includes 3 or 6 months of support (depending on the package) covering bugs, minor adjustments and questions. After that you can take a monthly retainer from $3,500/mo for continuous evolution, or keep just the hosting + technical maintenance plan from $1,500/mo.
In most cases, yes. We work with REST APIs, SOAP, webhooks, OData connectors (SAP) and CSVs when needed. If your system has a documented API, we can integrate it. If it doesn't, we evaluate RPA or middleware options. Our founder worked as a Backend Developer specializing in SAP, so enterprise integrations are our home turf.
Yes, all of our platforms are responsive and built mobile-first. By default we also enable them as a PWA (Progressive Web App), which means your users can install them on their phone like a native app, without going through the App Store or Google Play. If you need a true native app (iOS/Android), we quote that separately.
Every platform uses Row-Level Security (RLS) at the database level, JWT token authentication, forced HTTPS, encrypted secrets, daily backups with 30-day retention, and active error monitoring. For clients that require specific compliance (GDPR, US data-privacy standards, ISO 27001), we run formal audits in the Enterprise tier. We also configure MFA and enterprise SSO when required.
Yes — for startups with real traction (paying customers, MRR, or a closed seed round) we evaluate alternative models: 5% to 15% equity depending on the project, a success fee on revenue generated, or a hybrid (reduced cash + smaller equity). We need to see your financial plan and current metrics before agreeing.
We separate scope changes (new features that weren't planned) from iteration changes (adjustments to what's been built). Iteration changes are included at no cost throughout the project — that's why we ship in weekly sprints. Major scope changes are quoted separately and scheduled after the initial launch, or roll into the monthly retainer afterward.

You have the problem, we have the platform.

Book a 30-minute diagnostic. We'll tell you exactly which tier you fall into, which modules you need and what it would cost. Within 48 hours you have a proposal with scope, timeline and a real price in USD.

$ book_diagnostic ← See other services