DILAGO

Practice Area 01 · Software Engineering

Anyone can ship a demo now.We build the versionyour business can run on.

Web platforms, mobile apps, and the backend behind them—engineered for real traffic, real payments, and real customers. Built inside your repository and cloud, by senior engineers you actually talk to.

Book a 30-Min Architecture CallSee Where We Help

Juan José López MartínezFounder · Senior Software & AI Engineer

  • 01 · Ownership100% yours from day one: code, cloud accounts, credentials
  • 02 · ExecutionA senior engineer reviews every line—no hand-offs
  • 03 · ConfidentialityNDA before repo access; a written plan before any code

01 · Where We Help

Four situations we are usually brought in for.

Every engagement ends the same way: clean, documented code in your repository that your team can keep extending.

From MVP to Production

Your MVP works. Now enterprise customers are asking about security, uptime, and data isolation.

AI tools and fast teams can get a product to demo in weeks. Passing a customer’s security review is a different job.

How we approach it

We keep what works and replace what will not hold: tenant isolation in the database, access control, automated tests in CI, reproducible deployments, and monitoring that flags errors before your customers do.

What stays in your repository

  • Production repository with CI/CD and infrastructure as code
  • Multi-tenant data model with row-level isolation
  • Error and performance monitoring ready for security reviews
  • TypeScript
  • FastAPI
  • PostgreSQL
  • AWS
  • Sentry
Discuss your MVP

Custom Platforms · Web & Mobile

Your operation has outgrown spreadsheets and off-the-shelf SaaS.

When the tools force workarounds, your team ends up serving the software instead of the other way around.

How we approach it

We model how your business actually works—approvals, permissions, exceptions, audit trail—then build the web and mobile apps around it on typed APIs your team can extend. If an existing product covers most of the need, we will say so and integrate it instead.

What stays in your repository

  • Web and/or mobile app with role-based access control
  • Business workflows modeled explicitly, with a full audit trail
  • Documented API contracts your team can build on
  • React / Next.js
  • Flutter
  • FastAPI
  • .NET
  • PostgreSQL
Discuss your platform

Legacy Modernization

The core system is slow, fragile, and everyone is afraid to deploy.

Years of rushed features—now joined by unreviewed AI-generated code—turn the system everyone depends on into the one nobody wants to touch.

How we approach it

No stop-the-business rewrite. We measure where it actually hurts, put tests around the critical paths, fix the database bottlenecks, and replace modules one at a time while the system stays live.

What stays in your repository

  • Critical paths covered by tests and stabilized under load
  • Modules your team can deploy independently
  • Written records of each architectural decision
  • PostgreSQL
  • SQL Server
  • MongoDB
  • Redis
  • .NET
Discuss your system

Integrations & Payments

Integrations that fail silently: lost orders, double charges, manual reconciliation.

Payment providers, ERPs, and partner APIs time out and retry. Without the right design, every retry is a chance to lose or duplicate data.

How we approach it

We treat every external system as unreliable by default. Each event takes effect once—duplicates are detected and ignored, retries are safe—and anything that still fails lands in a queue you can inspect and replay, not in a spreadsheet.

What stays in your repository

  • Payment and webhook handling designed so a retry cannot double-charge
  • Background queues with safe retries and replay of failed events
  • Typed integration contracts with full trace logs
  • NestJS
  • Redis
  • AWS SQS
  • Celery
  • Docker
Discuss your integrations

Shipped through reviewed pull requests and CI

02 · How We Work

AI can write code in seconds. It cannot own your uptime. That part is still engineering—and it stays in your hands.

How We Work Together

Non-Negotiables

Portrait of Juan José López Martínez, founder of DILAGO

Who you work with

The people who scope your system are the people who build it.

Founded and led by Juan José López Martínez, Senior Software & AI Engineer with 6+ years of production experience. Every architecture decision and pull request is reviewed by a senior engineer.

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03 · Start a Conversation

Tell us what you are building or untangling.

Book a 30-minute call, or send a short note about your system. We take on a limited number of engagements at a time, so you always get senior attention.

Common Questions

You do, 100%, from day one. We work inside your GitHub organization and your own cloud and database accounts.

DILAGO is led by Juan José López Martínez, Senior Software & AI Engineer with 6+ years of production experience. Every architecture decision and pull request is reviewed by a senior engineer—no intermediaries, no hand-offs.

Yes. A full build, a modernization of an existing system, or hardening an MVP so it can take on enterprise customers—we fit into your workflow.

We start with a clearly scoped first step—usually a written technical plan or an assessment of your current system—so you can judge the work before committing to the full build. After that, milestone-based delivery or focused engineering sprints, whichever fits the work. Scope and price are agreed in writing before work starts and depend on your case, not on a rate card.

Schedule a 30-Minute Architecture Call

A technical conversation with a senior DILAGO engineer about your product, architecture, or integrations.

  • With a senior engineer who does the work—no sales pitch
  • Mutual NDA available before reviewing private repositories
JJ

Your message goes to the founder:

Juan José López Martínez

Founder · Senior Software & AI Engineer

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