Company Description Four Symmetrons Innovation (FSI) is a Nepal-based offshore technology provider specializing in application development, Business Intelligence, data solutions, and AI/ML. The company focuses on building scalable, secure, and high-performance software that helps clients transform their operations through data-driven insights and automation. FSI offers end-to-end services, from custom applications and advanced BI tools to comprehensive data management and intelligent AI systems. Each solution is tailored to client needs and delivered with strict quality control, ensuring strong performance, security, and user experience. FSI positions itself as a trusted partner for organizations seeking innovative, technology-led growth.

Role Description The Senior Dotnet Developer (Client Faced) is a full-time, hybrid role based in Kathmandu. This role is responsible for designing, developing, and maintaining .NET-based applications using .NET Core and ASP.NET MVC, ensuring high-quality, scalable, and secure solutions. Day-to-day activities include writing clean, maintainable code, implementing object-oriented designs, performing code reviews, and troubleshooting issues across the application stack. The developer will collaborate closely with clients to gather requirements, provide technical guidance, present solutions, and manage expectations throughout the project lifecycle. The role also involves working with cross-functional teams, contributing to architectural decisions, optimizing application performance, and mentoring less experienced developers.

Job Purpose

The role combines strong .NET development expertise with modern front-end technologies 

and CMS platforms to deliver scalable, future-ready digital solutions and engaging digital 

experiences for global clients.

The Senior .NET Developer will be responsible for designing, developing, integrating, and 

maintaining high-quality web applications and CMS-driven platforms while working closely 

with clients, designers, developers, and other stakeholders.

What are we looking for?

An experienced .NET developer with strong expertise in backend architecture and CMSbased web development. The one who loves solving complex technical challenges, are 

comfortable working across the full web development lifecycle, and can collaborate 

directly with clients to translate business requirements into effective technical solutions.

The candidate should have strong understanding of modern web development practices 

and can take ownership of technical delivery while supporting and mentoring other team 

members.

What You'll Do

• Design, develop, and maintain scalable web applications using C#, .NET, and Web 

API.

• Develop and integrate solutions using enterprise CMS platforms such as Optimizely 

and Umbraco.

• Build and maintain responsive, high-performance front-end experiences using 

React, TypeScript, HTML, CSS, and Tailwind CSS.

• Translate business and technical requirements into robust, scalable, and 

maintainable solutions.

• Work closely with designers, developers, project managers, and clients to deliver 

high-quality digital experiences.

• Participate in technical discussions, solution design, code reviews, and 

architectural decisions.

• Develop and integrate APIs, third-party services, and CMS components.

• Ensure solutions are optimized for performance, security, accessibility, SEO, and 

cross-device compatibility.

• Set up and maintain effective development workflows, environments, and 

deployment processes.

• Work with CI/CD pipelines and support smooth deployments across multiple 

environments.

• Troubleshoot, debug, and resolve application and production issues.

• Contribute to Agile ceremonies and deliver work effectively within sprint cycles.

• Provide technical guidance and mentorship to junior and mid-level developers.

• Stay current with emerging technologies, frameworks, CMS capabilities, and 

industry best practices.

Skills and Competencies

Technical Skills

• 5+ years of professional experience in C# and .NET development.

• Strong experience with ASP.NET Core / .NET, Web API, and backend architecture.

• Hands-on experience with Optimizely and/or Umbraco CMS.

• Strong knowledge of React, TypeScript, HTML, CSS, and Tailwind CSS.

• Strong understanding of responsive and cross-browser web development.

• Experience with RESTful APIs and third-party integrations.

• Good understanding of databases and data-driven applications.

• Experience with Git and modern software development workflows.

• Proven experience working with CI/CD pipelines and multi-environment 

deployments.

• Understanding of application performance, security, scalability, and maintainability.

• Experience with cloud platforms and modern deployment practices is an 

advantage.

CMS Experience

• Strong practical experience developing and customizing CMS-based websites and 

applications.

• Experience creating reusable CMS components, templates, content models, and 

integrations.

• Understanding of content management workflows, permissions, publishing, and 

personalization.

• Experience troubleshooting and optimizing CMS implementations.

• Knowledge of Optimizely CMS, Umbraco, or similar enterprise CMS platforms.

Professional Skills

• Working proficiency in English is must have

• Strong problem-solving and analytical skills.

• Excellent communication and stakeholder management skills.

• Comfortable working directly with clients and translating business requirements 

into technical solutions.

• Ability to take ownership of deliverables and work independently.

• Comfortable collaborating within multidisciplinary teams.

• Experience working in an Agile/Scrum environment.

• Strong attention to quality, performance, and technical detail.