Build
Custom software, with an architecture designed to grow with your business.
- Web, mobile, APIs and integrations
- Documented architecture
- 100% your code, in your repository
Software Factory · 16 years of expertise
Software proven before it reaches you.
We build and test in the same team. You get a system that works on launch day: no rework, no surprises in production, and no paying twice for the same delivery.
30 minutesNo commitmentReply within 1 business day
16yearsof software expertiseDevelopment, testing and project management for companies of every size.
release · checkout-service
ReactNext.jsNode.js.NETJavaPythonFlutterReact NativePostgreSQLAWSAzureDockerPlaywrightCypressSeleniumk6
01 — THE PROBLEM
The most expensive software is the one you have to build twice.
If you have ever hired a development team, you probably know at least one of these:
TIMELINE
The 3-month project took 9.
Without a clear scope and visible progress, the project runs in the dark. You only find out it's late when the delay has already cost you.
QUALITY
The system goes down on your biggest sales day.
A bug in production doesn't just cost the fix. It costs customers, reputation and your team's entire weekend.
LOCK-IN
The vendor disappears and takes the knowledge with them.
Code without documentation or tests is held hostage by whoever wrote it. Every change becomes a risk.
VISIBILITY
You're paying, but you can't see what's being done.
Vague reports, demos that never happen, and an "almost done" that repeats every single week.
02 — THE SOLUTION
Build. Test. Prove. In the same team.
At JJ Labs, the people who build and the people who test work side by side from day one. Quality isn't a phase at the end of the project. It's the whole method.
Test
Automated tests written alongside the code, not after the problem shows up.
- Unit, integration and end-to-end
- Performance and load
- Full regression on every delivery
Prove
Every delivery comes with evidence. You don't have to take our word for it.
- Working software demo every 2 weeks
- Quality report for every release
- Progress dashboard open to you
03 — SERVICES
Everything your IT operation needs, held to one quality standard.
From a brand-new system to the legacy one nobody wants to touch. Hire one service or the whole team.
Custom software development
Web systems, mobile apps, APIs and SaaS platforms built around your process, not the other way around.
Learn moreQA & software testing
Automation, manual testing, performance and regression for new systems or ones already in production.
Learn moreDedicated squads
Developers, QA engineers and management assigned to your project, ready in days, without the cost and risk of hiring.
Learn moreProject & product management
Scope, prioritization, schedule and communication with the business. Someone accountable for making it happen.
Learn moreCloud, DevOps & support
Infrastructure, automated deployment, monitoring and ongoing support to keep your system running.
Learn moreConsulting & technical audits
Code, architecture, security and process assessment. You'll know exactly where you stand and what to do next.
Learn more
04 — COMMITMENTS
Promises you can hold us to.
15daysbetween each demo of working software
100%of deliveries come with a test report
24hbusiness hours to answer any request
90dayswarranty on everything we deliver
05 — HOW WE WORK
From the first call to a system in production, with no black box.
- 01
Free assessment
30 minutes to understand your business, the problem and what "success" means to you.
Day 1 - 02
Clear proposal
Scope, timeline and investment in writing. No fine print and no "it depends."
Within 5 business days - 03
Sprints with demos
Every two weeks you see working software, not slides.
Every 2 weeks - 04
Proven delivery
Releases with automated tests, a quality report and documentation.
Every release - 05
Continuous evolution
Warranty, support and improvements. We stay with you after launch.
Ongoing
06 — CLIENTS
From people who took their project off the drawing board with us.
In eight years of hiring vendors, this was the first time I got a test report along with the delivery. We launched without a single incident.
The regression that used to take three weeks now runs in 40 minutes. We started shipping every week, without fear.
I'm not technical and I never felt lost. Every two weeks I could see the app evolving in my hands. It felt like having an in-house team.
The JJ Labs 90-day warranty
If a defect shows up in production in something we delivered within scope, we fix it at no cost and with priority. It's that simple: we trust what we test.
07 — FAQ
Straight answers so you can decide with confidence.
Don't see your question? Ask it in the free assessment. Answering is part of the job.
How much does it cost to build a system?
It depends on the scope, but you're never left in the dark. After the free assessment, we send a proposal within 5 business days, either a fixed project price or a monthly squad price. No hidden costs and no "it depends" halfway through.
How long until the system is ready?
An MVP is usually ready in 8 to 12 weeks. But you don't wait until then to see results: every two weeks we demo working software.
Do I own the code?
Yes, 100%. The repository lives in your account, with documentation and tests. If you ever want to move to another team or bring it in-house, you take everything with you. No lock-in.
Do you test systems built by another company?
Yes. We provide QA as a service, test automation, performance testing and audits on existing systems, legacy ones included. Many clients start here.
I already have an in-house team. Does it make sense to hire you?
It does. We can strengthen your team with developers or QA engineers who work inside your process and tools, or take over an entire workstream while your team focuses on the core business.
I'm not technical. Will I be able to follow along?
You will. We speak the language of business, show you the working system every two weeks, and you get access to a progress dashboard. No jargon to hide delays.
Do you sign NDAs and follow data protection laws?
Yes. We sign an NDA before you share any sensitive information, and data handling, access and environments follow LGPD (Brazil's data protection law) best practices.
What technologies do you work with?
React, Next.js, Node.js, .NET, Java, Python, Flutter and React Native for development; Playwright, Cypress, Selenium and k6 for testing; AWS, Azure and Docker for infrastructure. If your system uses a different stack, let's talk.
What happens after the system goes live?
You get a 90-day warranty on what we delivered and can choose a support plan with monitoring, fixes and continuous improvement.
How do we get started?
Book the free assessment using the form below. In 30 minutes we understand your situation, and you leave with clarity on approach, timeline and investment, even if you decide not to work with us.
Next step
Your next system could be the first one that simply works.
Book a free 30-minute assessment. You'll leave the call with clarity on scope, timeline and approach, even if you decide not to work with us.
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