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Senior Software Engineer (React.js, .NET) - OP01781 at Dev.Pro. 🟢 Are you in Brazil, Argentina or Colombia? Join us as we actively recruit in these locations, offering a comfortable remote environment. Submit your CV in English, and we'll get back to you!. We invite a talented and driven Senior Full-Stack Software Engineer with strong .NET and React.js skills to join our experienced, cross-functional Agile team. In this role, you’ll contribute to the modernization of a critical internal platform, transforming a complex legacy system into an efficient, scalable solution that offers improved performance and a better user experience. . 🟩 What's in it for you:. . Work with a reputable S&P 500 fintech company. . Modernize a critical platform with multiple dependencies, integrations, and complex logic . . Join an experienced, international team using a modern tech stack (NET 6+, React.js, TypeScript, Next.js, Docker, GCP). . ✅ Is that you?. . 6+ years of experience with .NET 6+ and .NET Core development. . 2+ years of experience with JavaScript (React.js, TypeScript). . Proven experience developing APIs with .NET 6. . Strong knowledge of SQL Server and stored procedures. . Experience writing unit tests and producing testable code. . Solid understanding of OOP principles and related concepts. . Experience building n-tier enterprise applications. . Strong technical judgment in selecting and applying languages, patterns, and libraries. . Good knowledge of Scrum methodology. . Excellent communication and teamwork skills. . Ownership, accountability, and proactive problem-solving. . Upper-Intermediate English level. . Familiarity with pre-Core .NET (ASP.NET 4.8.1, WebForms, Razor Pages, ADO.NET). . Experience with Next.js . . Experience with Docker, GCP, AWS, and deployment processes. . Familiarity with CQRS . . Desirable:. . Fintech domain experience. . Experience working in international companies. . Experience working with Copilot. . . 🧩Key responsibilities and your contribution. In this role, you’ll help rewrite our legacy application to improve its performance and quality and introduce new features using a modern tech stack.. . Develop and maintain high-quality code for new features and improvements. . Participate in the release process to ensure smooth deployments. . Collaborate with the team to refine the technical backlog. . Conduct code reviews and provide constructive feedback. . Work with the team to resolve technical challenges and implementation issues. . Contribute ideas and suggestions to improve the overall application architecture. . 🎾 What's working at Dev.Pro like? . Dev.Pro is a global company that's been building great software since 2011. Our team values fairness, high standards, openness, and inclusivity for everyone — no matter your background. 🌐 We are 99.9% remote — you can work from anywhere in the world. 🌴 Get 30 paid days off per year to use however you like — vacations, holidays, or personal time. ✔️ 5 paid sick days, up to 60 days of medical leave, and up to 6 paid days off per year for major family events like weddings, funerals, or the birth of a child. ⚡️ Partially covered health insurance after the probation, plus a wellness bonus for gym memberships, sports nutrition, and similar needs after 6 months. 💵 We pay in U.S. dollars and cover all approved overtime. 📓 Join English lessons and . Dev.Pro. University programs, and take part in fun online activities and team-building events. Our next steps:. ✅ Submit a CV in English — ✅ Intro call with a Recruiter — ✅ Interview — ✅ Offer. Interested? Find out more:. 📋How we work. 💻 LinkedIn Page. 📈 Our website . 💻IG Page . Company Location: Brazil.