We are seeking a highly experienced Senior Web Developer with strong expertise in both backend and frontend technologies to diagnose, troubleshoot, and resolve complex bugs across modern web applications. The ideal candidate combines deep technical knowledge with practical debugging skills, ensuring stable, performant, and maintainable software systems. In this role, you will primarily focus on identifying application issues, analyzing root causes, and implementing efficient fixes without disrupting existing workflows. You’ll work across full-stack environments including .NET/C#, Ruby-based systems, and modern JavaScript frameworks such as React and Next.js. Your ability to quickly understand legacy codebases, refactor problematic components, and improve code reliability will be critical. Key Responsibilities • Investigate, diagnose, and resolve bugs across full-stack web applications • Debug backend services built with .NET/C# and Ruby frameworks • Fix frontend UI/UX issues in React and Next.js applications • Optimize performance, reduce technical debt, and improve system stability • Review existing architecture and suggest practical improvements • Maintain clean, maintainable, and well-documented code standards • Collaborate with product teams, designers, and other developers • Ensure responsive, cross-browser compatible interfaces • Implement logging, monitoring, and error tracking enhancements • Support ongoing maintenance, upgrades, and deployment fixes Required Technical Skills • Strong experience with .NET ecosystem, C#, ASP.NET Core • Proficiency in Ruby environments (Rails or similar frameworks) • Advanced React and Next.js frontend development knowledge • Solid understanding of REST APIs, authentication, and data flow • Experience debugging production environments and live systems • Knowledge of SQL/NoSQL databases and performance optimization • Familiarity with Git workflows, CI/CD pipelines, and cloud deployment • Ability to analyze legacy systems and refactor safely Preferred Qualifications • Experience handling large-scale or enterprise web applications • Exposure to DevOps practices, containerization, or cloud platforms • Understanding of scalability, caching strategies, and security best practices • Strong documentation and communication skills What We Value We value developers who approach problems analytically, communicate clearly, and take ownership of delivering reliable solutions. Attention to detail, patience in debugging complex systems, and the ability to balance quick fixes with long-term improvements are essential qualities for this position. This role is ideal for a senior developer who enjoys solving challenging technical issues, stabilizing applications, and improving overall system quality while working with modern full-stack technologies.