Summary: VAIRIX is seeking a proactive and product-oriented Senior Fullstack Developer with strong Ruby on Rails and React expertise to navigate complex systems and contribute to technical decisions within a distributed team. Highlights: 1. Opportunity to join a mature, production-level project 2. Collaborative, friendly team environment 3. Focus on professional growth and knowledge sharing At **VAIRIX**, we’re looking for a **Senior Fullstack Developer** with strong experience in **Ruby on Rails** and **React** to join a mature, production\-level project. The ideal candidate brings solid backend expertise in Rails, combined with hands\-on frontend experience in React — especially working with **class components**. You should feel comfortable working in a cloud\-based environment (**AWS**), understand containerized applications (**Docker**), and have experience with monitoring and debugging tools like **Sentry** or **Honeybadger**. We value developers who are **autonomous, proactive, and product\-oriented**, with the ability to navigate complex systems, contribute to technical decisions, and collaborate effectively within a distributed team. Advanced English is required, as you’ll be working closely with international stakeholders. **What we offer** * 20 vacation days per year * Adaptable working hours, encouraging work\-life balance * Remote/Hybrid work * Wellness: Medical insurance coverage and fitness reimbursement or membership * Allowances for professional education * In\-company English classes * Internal knowledge\-sharing sessions * Collaborative, friendly team environment and company social events **About VAIRIX** VAIRIX is a nearshore software development company that helps startups and growing organizations and accelerate innovation through custom software development and high\-performing staff augmentation teams. With a boutique\-style approach, a convenient South American timezone, and competitive rates, we’ve delivered 30\+ successful projects for U.S. clients, consistently providing fast onboarding, seamless collaboration, and high\-quality engineering. Our Agile teams work in real time with U.S. product and engineering groups to design, build, test, and refine ideas, turning them into solutions that drive business outcomes and delight users. **Want to join us?** If you're a growth\-driven professional looking for meaningful challenges and collaborative work, we’d love to connect.