[Hiring] Senior Full-Stack Engineer @99x Brazil (formerly Nextly)

Role Description

99x Brazil is seeking a Senior Full-Stack Engineer with expertise in Angular and Node.js to join our innovative and AI-native development team. As part of a dynamic and collaborative environment, you will play a key role in building and evolving scalable web applications that leverage artificial intelligence to deliver exceptional user experiences.

In this role, you will work closely with product managers, designers, and other engineers to implement new features, optimize existing codebases, and drive technical excellence. We value a startup mindset and the ability to navigate ambiguity while delivering high-quality software solutions.

• Design, develop, and maintain full-stack web applications using Angular and Node.js.
• Integrate AI-powered features and workflows to enhance product capabilities.
• Collaborate with cross-functional teams to define requirements and deliver solutions.
• Ensure code quality through testing, code reviews, and adherence to best practices.
• Optimize application performance, scalability, and security.
• Continuously research and implement emerging technologies and AI tools to improve development processes.
• Mentor junior engineers and contribute to a culture of learning and innovation.

Qualifications

• Advanced English skills
• 5+ years of experience in Angular and Node.js development
• Strong proficiency in TypeScript, HTML, and CSS
• You ship end-to-end. You own a feature from problem definition to production, with AI as a core tool in your workflow.
• Generalist by instinct. You’ve worked across the stack or shown you can. Depth in one area, genuine curiosity about all of them.
• First-principles thinker. You frame the right problem before writing a line of code, and you push back when the brief is wrong.
• AI-native. You don’t use AI tools occasionally. They’re built into how you work. You can describe exactly how.
• Production ownership. You don’t consider something done when it merges. You monitor, iterate, and stay accountable.

Benefits

• Your pick when it comes to employment models: CLT/PJ/Cooperativa;
• We provide resources for you to grow and learn on the job, including online courses, mentoring, and the latest gen laptops;
• A fully remote work environment with flexible working hours;
• Bonus for any referrals that we end up hiring.