Who builds your software from Córdoba, Argentina
Siblings Software is headquartered in Miami. Our delivery office is in Córdoba, Argentina's second-largest city, and our engineers work from across Latin America on US business hours. Since 2014 that setup has delivered more than 250 engagements, about 40% of them for venture-backed startups and the rest for mid-market and enterprise teams.
Below: who is on the team, how much of your day you share with them, how the work runs, and how to meet the people in person. Company background is on our about us page.
Key facts
- Headquarters
- 1110 Brickell Ave, Miami, FL 33131, USA
- Delivery office
- Sipe Sipe 1479, Córdoba, Argentina
- Engineers in
- Argentina, Colombia, Mexico and Uruguay
- Time zone
- Córdoba is UTC−3 all year, no daylight saving
- Track record
- Operating since 2014, 250+ engagements
- Leadership
- Javier Uanini, founder and CEO
- Phone
- +1 347 774 1275
Who is on the team
The people you talk to every day are engineers, not account managers.
Siblings began as a Córdoba company working with developers from across Argentina. Today the bench also includes engineers in Colombia, Mexico and Uruguay, with Córdoba as the delivery hub.
A typical team mixes front-end, back-end and mobile engineers with QA, DevOps and an architect when the work calls for one. The stacks we staff most often are React and React Native, Flutter, .NET and C#, Node.js, Python and Angular, running on AWS or Azure. The team also runs discovery, architecture reviews, legacy modernization and platform engineering, so we can help decide how to build something, not only build it.
The company is led by founder and CEO Javier Uanini. The rest of the leadership is on our team page, and engineers reading this can find open roles on the careers page.
Why we run delivery from Córdoba
Córdoba is one of Argentina's main technology hubs and a university city. The Universidad Nacional de Córdoba, founded in 1613, is the oldest university in the country, and the Córdoba regional faculty of the Universidad Tecnológica Nacional (UTN FRC) offers an information systems engineering degree. Both feed the local software industry.
We chose not to be in Buenos Aires. Córdoba gives us lower operating costs and a focused engineering culture, and many of our engineers have years of distributed-team work behind them, so async updates, daily standups and written documentation are routine.
Being an Argentine company also helps when the product itself is Argentine. Rent indexed to official ICL and CPI data, BCRA debtor checks and Mercado Pago collections are everyday context for the team, and all of them are in scope in the rental-management app we are building for an Argentine real estate company.
Time-zone overlap with US teams
Córdoba runs on Argentina Time, UTC−3, and Argentina does not observe daylight saving time. The only clock that moves is yours. From March to November, Córdoba is one hour ahead of New York, two ahead of Chicago and four ahead of San Francisco. From November to March, add one hour to each.
In practice, 9:00 in New York is 10:00 or 11:00 in Córdoba. Our engineers set their day to cover your core hours, so standups, pairing and incident calls happen live. Pacific teams get the most shared time when ceremonies sit in the Pacific morning.
Your repositories, your working hours, one accountable lead on our side.
How a US client works with the team
From first call to first deliverable in about three to four weeks.
Discovery
Three to five days to agree on scope, constraints and team shape. You meet the delivery lead who will own the engagement.
Team assembly
Five to ten days. You meet the proposed engineers on a call before they start.
First deliverables
Usually in week three or four, shown in a sprint demo.
Steady state
Two-week sprints with a demo and a retrospective, a shared velocity dashboard and one accountable lead.
We run Scrum for new builds and Kanban for products that are already live and need a steady flow of fixes and small features. Every engagement starts with a two-week satisfaction guarantee, and scaling a team down takes 30 days' notice. More detail on the model is on our nearshore software development page.
Project-based
Typically $15k to $120k, two to six engineers, one to six months. For a defined scope.
Dedicated team
Typically $12k to $60k a month, four to twelve people, six to 24 months or longer. For a long-running roadmap.
Staff augmentation
Typically $4k to $9k per developer per month, one to five specialists, one to twelve months. For teams with a manager and backlog.
How we deliver in 2026
AI agents under senior review
Engineers work with AI coding agents inside written repository rules. Agents draft code, tests and migrations, but they never merge their own work: every change goes through a pull request that a senior engineer reviews. Credentials and customer data stay out of prompts. More on this in our AI code security practice.
A security baseline on every repository
Repositories we set up start from the same baseline: secret scanning with gitleaks, static analysis (SAST) and dependency scanning (SCA) in CI, container image scanning with Trivy before deploy, and short-lived OIDC credentials instead of long-lived cloud keys. See our DevSecOps services.
Recent work from the team
For an Argentine real estate company, we are building a rental-management app for property owners under a fixed-scope, 12-week contract that started in October 2026: iOS and Android apps built with Expo and React Native, a Next.js 16 admin and API, and integrations with Mercado Pago, the BCRA debtor registry and the official rent indices.
For a European information-security company, we finished an ISO 27001 compliance SaaS and it went live on the client's own AWS account in October 2026, with Cognito MFA, ECS Fargate and gated releases. We owned the application, CI/CD and runbooks; the client's team kept Terraform and the account. That split works well when you already have an infrastructure team.
Earlier clients include Bari, BinSensors, HighSide, Sur Technology Holdings, Pentalog and Viking; their stories are in our case studies.
Visit the Córdoba office
The office is at Sipe Sipe 1479, Córdoba. If you are planning a trip to Argentina, send us your dates and we will set up a working session at the office with the people on your project. Córdoba has its own international airport.
For meetings in the US, our headquarters is at 1110 Brickell Ave, Miami. Most clients meet the team on video and keep meeting it in Slack and sprint demos.
Frequently Asked Questions
Córdoba is on UTC−3 all year, so it is one to two hours ahead of US Eastern time and four to five ahead of Pacific. Our engineers work US business hours: Eastern and Central teams share most of the day, and Pacific teams get the most live time with morning ceremonies, which we schedule in the first week.
Yes. Standups, pull-request reviews, tickets, documentation and sprint demos all run in English with your team. For country-level context, Argentina scores well above the global average in the EF English Proficiency Index.
Your agreement is with Siblings Software, headquartered in Miami. NDAs are signed before anyone gets repository access, the code lives in repositories you control, and IP ownership of the work product is written into the agreement. We send the paperwork early so your counsel can review it during discovery.
Yes. You meet the proposed engineers and the delivery lead on video before they start. If you are traveling to Argentina, we host working sessions at the Córdoba office on Sipe Sipe 1479, and US meetings can happen at our Miami headquarters.
Agents draft code, tests and migrations inside written repository rules, and a senior engineer reviews every pull request before merge. CI runs secret scanning, static analysis and dependency checks, and credentials and customer data stay out of prompts.
Usually three to four weeks from first call to first deliverable: three to five days of discovery, then five to ten days of team assembly.
No. Córdoba is our delivery office, and the engineering bench also includes people in Colombia, Mexico and Uruguay. Everyone works US business hours under the same delivery process and the same repository baseline.
Talk to the Córdoba team
Tell us what you are building and your team's hours, or reach us on LinkedIn.