IT Staff Augmentation
Extend your team with pre-vetted senior engineers who integrate into your workflows, communicate in real time, and ship with speed.
We are;
Engineering partners
We’re a curated Brazilian software development agency with 15+ years of experience and a handpicked roster of 60+ senior engineers, designers, and product leaders.
o We have;
4.9
4.9/5 from client reviews
In-depth, verified testimonials from a trusted 3rd party - Clutch.co
93
Exceptional eNPS
A testament to our strong culture and engagement.
15+
Years of expertise
Helping global businesses build and scale with confidence.
Our services
Flexible engagement models tailored to your needs
Custom Software Development
End-to-end development of web and mobile apps, cloud platforms, and enterprise systems.
Web Application Development
Build secure, scalable, and user-friendly web apps using modern frameworks like React, Vue, Node.js, and Django.
Custom Mobile App Development
From MVPs to enterprise-grade apps, we design and build for iOS, Android, and cross-platform.
AI & Data Solutions
AI development services including predictive analytics, machine learning models, and tools like AI chat assistants.
AI @99xAmericas
Future proof engineering with AI
We’re a custom software development company first. AI is a powerful enabler, but when misapplied it creates fragile, unmaintainable systems. Teams that let models generate large swathes of application logic without specs or review often end up with inconsistent architectures, hidden dependencies, security gaps, and growing technical debt that is hard to debug or test. At 99x we use AI deliberately, inside a specs-first, modular architecture and with human-in-the-loop review. This way you get the speed gains without losing control of the codebase. And if you prefer not to use AI at all, we simply don’t. Our core strength has always been senior engineers writing clean, robust software.
A culture of pushing boundaries
Why choose us
We like to think we're more than just your outsourced tech team, our experts don’t just code, they think strategically, challenge assumptions, and help you deliver successful products faster.
Selective, senior talent
every expert is vetted for technical mastery, communication, and an ownership mindset.
Experts who think, not just code
they challenge assumptions and help you deliver successful products faster.
Seamless team integration
our teams align with your culture, processes, and time zones, so you spend less time managing and more time shipping.
Proven nearshore expertise
15+ years of experience delivering high-quality software for clients globally.
Flexible approach to AI
we use AI deliberately and responsibly to accelerate development, without compromising code quality, or skip it entirely if you prefer.
Why choose us?
If hiring is smooth, candidates show up on time, and your team can consistently find the right talent without headaches, you probably don’t need us.
But if you’re struggling to hire A+ engineers, wasting hours on failed interviews, or facing months-long open roles that slow product development, we can help. We provide curated, senior software talent who integrate seamlessly with your team, think strategically like founders, and accelerate delivery—without the overhead of building an internal recruiting function or managing multiple freelancers.
In short: we make hiring top-tier product-focused developers fast, reliable, and effective, so you can focus on building your product, not your hiring process.
Proved product cases
Our customer stories
Proven results with long-term partners
Latest insights;
See what's new across our latest resources
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99x Portugal appoints Guilherme Ramos Pereira as Head of Strategic Development to put Data Science & AI at the core of the business
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How to tame your first agentic AI use case
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We're always excited to connect with potential partners and innovators. Whether you're looking to build a digital product or want to explore business opportunities with us, let's Connect!
We are;
Engineering partners
We’re a curated Brazilian software development agency with 15+ years of experience and a handpicked roster of 60+ senior engineers, designers, and product leaders.