OMSTA
A production ERP for a Dominican travel agency: bookings, payments, double-entry accounting, tax compliance, payroll and branches.
Open the case studyCUSTOM SOFTWARE · FULL-STACK
Custom software for your business.
I design and build the systems a business runs on: ERPs, internal dashboards, platforms with users and roles, and the API that connects them. Full-stack, from the database to the interface, working remotely from the Dominican Republic on hours that overlap with the US.
Custom software
What I build.
ERPs and business systems
Bookings, payments, accounting, payroll and branches in one system, with the local tax rules built in when the country requires them.
Internal tools
What lives in spreadsheets and chat threads today, turned into workflows with permissions, history and reports.
Backend and REST APIs
Django REST Framework and PostgreSQL: authentication, role-based permissions, automated tests and an API your web or mobile app can rely on.
Platforms with users
Communities, catalogs and knowledge bases with search, notifications and change history.
Systems in production.
Three full case studies, with their design and engineering explained.
Network
A social network with a Django REST API and a React + TypeScript app: cursor feed, rotating JWTs and 132 tests.
Open the case study
Wikiverse
An encyclopedia built from scratch: immutable revisions, word-level diffs and full-text search in PostgreSQL.
Open the case studyHow I work.
Process first
I learn how your team works before proposing screens: the system adapts to the business, not the other way round.
Data that adds up
Clear rules in the database, role-based permissions and a history of who changed what, and when.
Progress you can use
Every step ships to a real link so your team can try it while it’s being built.
Frequently asked questions
Before you write.
Can you work with the tools we already use?
Yes, through their APIs when they offer one: payments, email, messaging or accounting. We go through it in the first conversation.
Do you take backend-only work?
Yes. I can own just the API and the database, or the whole system with its web app and mobile app.
How much does custom software cost?
It depends on the scope. After our first conversation I send you a written proposal with phases, timeline and budget, before anything starts.
Do you work with companies in the US and Europe?
Yes, remotely, in English or Spanish. I’m on UTC−4: the same as US Eastern in summer and one hour ahead in winter, with an afternoon overlap with Europe.
Got a mission in mind?
Write to me with what you need. I read every message and reply myself.