99x Brazil is seeking a Senior AI-first Product Engineer to join our growing team. We are looking for engineers who take full ownership of products and features from discovery to production, operate comfortably across the stack, and use AI as a core part of how they design, build, and scale solutions.
You will help shape technical direction, work directly with clients and stakeholders, and contribute to the evolution of engineering practices within teams, while remaining accountable for product quality, performance, and outcomes long after deployment.
Responsibilities- Own product features end-to-end, from problem definition and architecture to deployment, monitoring, and continuous improvement
- Build AI-driven product experiences and integrate modern AI tools into the engineering workflow
- Collaborate cross-functionally with product, design, engineering, and business stakeholders to deliver impactful solutions
- Contribute across the stack, including frontend, backend, APIs, integrations, and cloud-based services
- Represent the company in technical and commercial discussions with clients, partners, and stakeholders
- Drive technical discovery sessions, solution design, and architecture discussions
- Mentor and upskill engineering teams on AI-assisted development practices and modern engineering workflows
- Optimize applications for performance, scalability, maintainability, and user experience
- Write clean, maintainable, well-tested, and well-documented code
- Stay up to date with emerging technologies, AI trends, and modern software engineering practices
Requirements
- 6+ years of experience in software engineering, with strong expertise in React, Next.js, TypeScript, Node or Python
- Proven experience building and scaling modern web applications across the full stack
- Strong understanding of software architecture, distributed systems, APIs, and scalable application design
- Hands-on experience using AI tools and AI-assisted development workflows as a core part of the engineering process
- Demonstrated product ownership mindset, with experience leading features or products from discovery to production and beyond
- Ability to think from first principles, challenge assumptions, and solve complex business and technical problems
- Strong communication and presentation skills, with the ability to represent technical solutions in client-facing and commercial discussions
- Proven experience mentoring engineers and driving AI upskilling initiatives within development teams
- Solid understanding of modern frontend development practices, component architecture, and responsive design principles
- Familiarity with cloud platforms, CI/CD pipelines, monitoring, and modern DevOps practices
- Advanced English communication skills, both written and verbal
Benefits
- Your pick when it comes to employment models: CLT/PJ/Cooperativa;
- A fully remote work environment with flexible working hours;
- Bonus for any referrals that we end up hiring.
Skills Required
- 6+ years of software engineering experience
- Strong expertise in React, Next.js, TypeScript, and Node.js or Python
- Experience building and scaling modern full-stack web applications
- Strong understanding of software architecture, distributed systems, APIs, and scalable application design
- Hands-on experience using AI tools and AI-assisted development workflows
- Experience leading features or products from discovery through production and ongoing improvement
- Ability to solve complex business and technical problems using first-principles thinking
- Strong communication and presentation skills for client-facing and commercial discussions
- Experience mentoring engineers and leading AI upskilling initiatives
- Understanding of modern frontend development, component architecture, and responsive design
- Familiarity with cloud platforms, CI/CD pipelines, monitoring, and modern DevOps practices
- Advanced written and verbal English communication skills
What We Do
? Ranked #1 Top Software Development Company in Brazil by Clutch, 99x Americas (formerly Nextly) is a team of +60 engineers, designers, and makers who work closely with founders, CTOs, VPs of Eng, and product & eng teams at Fortune 500s, Inc 5000s, and fast-growing startups across the United States to help create, launch, and improve digital products. About us: - We're 5 stars rated on Clutch and Glassdoor; - 99% of our employees or ex-employees have said they recommend Nextly; - The team has delivered literally 100% of the projects we took in the last 10 years; - Our engineers are all located in GMT-3, meaning we can achieve a significant overlap with PST and EST working hours; - In our latest opening, we only made offers to 2 candidates out of +1000 sourced devs. When clients interview our candidates, they can immediately tell the jump in quality. - We specialize in React, Typescript, React Native, Vue, Node.js, Python, AI/ML, Data Science, Django, Golang, PHP/Laravel, Java, .NET, AWS, GCP, Azure, and more. Our team is quite big so we have a wide array of talent. If you need to scale up your engineering team, give us a shot at showcasing our skills. Reach out to learn more about us, discuss your main challenges and goals, and book a technical interview, live coding exercise, or take-home assessment with the right talent for your project.
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