Custom ERP
Sales, purchasing, inventory and finance in a single system designed around how your company works, not the other way around.
Technology agency · Remote team
We build and
we keep your
operation running
We design and develop the software your company needs, then stay on to manage the infrastructure that keeps it running. One team to build and to operate, working remotely with clients in any country.
- Multi-tenant software in production
- Certified tax document issuance
- AI running daily
What we do
ERP y sistemas de gestión
Ventas, compras, inventario y finanzas en un solo sistema.
One question
How long does your team spend
How long does your team spend
typing the same thing twice?
Answer it out loud before you read on.
Five seconds looking for a number that should already be on screen.
A spreadsheet only knows what somebody typed. A commercial ERP only knows what it shipped with. The system we build knows how your company operates, because it is designed around it.
Enterprise
Software that carries
Software that carries
entire operations
As your company grows, spreadsheets and disconnected systems start costing you money: duplicated data, typing errors and decisions made blind. We build the system that organizes your whole operation, integrated with what you already use, and we stay on operating the infrastructure that keeps it online.
Modules and integrations
Already have an ERP? We build the module it lacks or connect the systems that don't talk to each other today.
B2B portals
Client, supplier or distributor portals connected to your operation: orders, account statements and documents without calls or emails.
Electronic invoicing
We integrate tax document issuance into your systems, with certified experience in El Salvador's DTE framework.
Legacy modernization
That old system your operation depends on can migrate to current technology without stopping your business.
Ownership
Where each piece of your system lives
-
yours
The source code Delivered in full once the project is paid, with the repository in your name. We keep no locked copies.
-
yours
The domain and credentials Registered under your company from day one, not under ours.
-
yours
Your operational data Exportable at any time in an open format. Never held hostage in a format only we can read.
-
we operate it
The server and monitoring For as long as you keep a monthly plan. If you cancel, we hand over the configuration so whoever you choose can run it.
-
we operate it
The backups Daily and with tested restores. One copy always stays in your own storage, not only in ours.
Test it Ask us today for a full export of your project. We hand it over without asking why.
Development
Software built around
Software built around
how your business works
No templates and no technical jargon. Every project is designed around the real problem you need to solve.
Custom websites
Pages that convey the quality of your brand and turn visits into clients, flawless from phone to monitor.
Brands and professionalsOnline stores
Catalog, cart and your own payments. A store that sells while you sleep, with full inventory control.
Shops and retailManagement systems
Orders, inventory, point of sale and reports in one place. For restaurants, salons and shops.
Growing businessesCustom applications
We automate that one process no commercial tool solves, exactly the way you need it.
Unique workflowsIntegrations and APIs
We connect the systems you already use so they talk to each other. Less manual typing, fewer errors.
Already digitalized businessesOngoing evolution
Your system doesn't stand still: we add features and adapt it as your operation changes.
Systems in production
Infrastructure
We don't just build it.
We don't just build it.
We keep it online.
We manage servers, migrations and monitoring so your operation doesn't depend on someone remembering to renew a domain. You sell, we hold up the infrastructure.
Managed servers
Provisioning, configuration and continuous tuning. We scale resources as your demand grows.
Zero-downtime migrations
We move your site or system from your current provider, planning the window so nobody notices the change.
Continuous monitoring
We watch availability and performance. If something fails, we know before your clients do.
Automatic backups
Periodic copies with tested restores. A backup that was never restored is not a backup.
Domains and email
Domain registration and renewal, corporate email under your own brand and SSL certificates always valid.
Security and access
Up-to-date patches, access control and server hardening as part of the maintenance plan.
24/7Availability monitoring
DailyAutomatic backup
Same dayIncident response
No downtimePlanned migration
Data & AI
Your data already exists.
Your data already exists.
It just needs to work for you.
We unify the information scattered across systems and spreadsheets today, and turn it into dashboards that show how your business is doing in real time. And where there is repetitive work, we apply artificial intelligence that already runs in real production systems: not a promise, something we do every day.
- Sales, operations and finance dashboards
- Automatic reports delivered to your inbox
- AI chatbots for web and WhatsApp support
- Intelligent document processing
- Workflow automation
- Data unification across systems
Process
Four steps,
Four steps,
no surprises
-
01
We talk
We learn your business, your client and what the project must achieve. A real conversation, not an endless form.
-
02
We design
We define the visual direction and the technical architecture. You see how it will look before we write code.
-
03
We build
Development in stages with visible progress and invoicing per approved milestone. You always know where your project stands.
-
04
We launch and sustain
We publish, configure the infrastructure and take over monitoring. The project starts with support in place.
Team
A small, senior team
A small, senior team
with no middlemen
Altenza Tech is Andrés and Alisson Serpas. You speak directly with the people who design, build and operate your system: no account managers, no work handed off to third parties and nothing lost in translation. Behind the brand there is real software in production: multi-tenant platforms, certified tax document issuance and artificial intelligence running daily for real businesses.
Andrés Serpas
Development and infrastructureSystem architecture, tax integration and production infrastructure operations.
Alisson Serpas
Design and experienceVisual direction, interface and client support throughout the project.
Senior attention
We take on few projects at a time so each one gets direct attention from start to finish.
Direct contact
You talk to whoever builds your system, not to a middleman relaying messages.
Continuity
The same team that builds is the one that operates and supports after delivery.
Pricing
Build once,
Build once,
supported every month
Development is quoted per project. Infrastructure and software evolution work as a monthly service.
Essential
A landing page that converts. Ideal to launch fast.
$450
one-time payment
- Single custom page
- Mobile and desktop design
- Contact form
- SSL certificate included
- Delivered in 7 days
Corporate
A complete site with identity and several sections.
$950
one-time payment
- Up to 5 sections or pages
- Visual identity included
- Corporate email configured
- Speed and SEO optimization
- Usage training
- 30 days of support included
Enterprise solutions
Custom ERP, B2B portals, integrations and systems with their own logic.
Based on scope
custom quote
- Prior technical consultation
- ERP, B2B portal or custom system
- Integrations with your tools
- Invoicing per approved milestone
- Infrastructure and SLA included
Technology assessment
Before quoting a large project, we review your systems, your infrastructure and your processes. We deliver a report with findings and a prioritized roadmap. If you go ahead with the project, the assessment fee is deducted.
From $300
Request assessment
Presence
For informational sites that must always be online.
$29
per month
- Managed hosting
- Domain and SSL renewed
- Weekly backup
- Security updates
- WhatsApp support
Operation
For stores and systems that carry your sales.
$89
per month
- Everything in Presence
- Daily backup with tested restore
- 24/7 availability monitoring
- Managed corporate email
- Same-day incident response
- 2 hours of changes per month
Evolution
A monthly block of hours so your system keeps growing.
Based on scope
custom quote
- 10, 20 or 40 hours per month
- New features and adjustments
- Priority in the schedule
- Monthly progress meeting
- Unused hours roll over one month
Infrastructure
For companies with multiple systems and users.
Based on scope
custom quote
- Everything in Operation
- Dedicated or scalable servers
- Planned migrations
- Access control and auditing
- Written SLA with defined response times
FAQ
What people
What people
usually ask us
If your question isn't here, write to us and we'll answer with no commitment.
Yes, and it's a deliberate advantage. We take on few projects at a time so each one gets senior attention from start to finish. When a project needs more hands, we bring in trusted specialists under our coordination and responsibility.
With written service level agreements: defined response times, daily backups with tested restores and full system documentation. On top of that, the code and the credentials always stay in your name, so you never depend on us against your will.
A landing page is delivered in roughly one week. A corporate site takes two to three weeks. Enterprise systems depend on scope and are defined in the initial assessment, with dates per stage and invoicing per approved milestone.
No. You can take the project and manage it yourself. That said, if the system carries your operation, the monthly plan covers backups, monitoring and evolution you would otherwise have to handle in house.
Yes. The domain, the code and the credentials are your property. If you ever decide to work with another team, we hand everything over without holding anything back.
Yes. We develop and integrate tax document issuance adapted to your country's regulations and your business flow. We have deep experience with El Salvador's DTE system and also work with other regulatory frameworks.
Yes. We handle the full migration of the site, database, email and domain. We plan the switchover window so your clients notice no interruption.
Small projects run with a deposit up front and the balance on delivery. Enterprise projects are invoiced per approved milestone. Monthly plans are billed a month in advance and you can cancel whenever you want.
Contact
Tell us what
Tell us what
you want to build
We reply the same business day. Reach out through whichever channel suits you or book a consultation call.
We work remotely with clients in any country · Support in Spanish and English