Senior .NET Developer at Zain

Zain; Manama; On-site; BHD 17,000 - 26,000; Full time

Job summary

Zain is seeking a Senior .NET Developer to lead design, development, and maintenance of robust .NET-based solutions across desktop, services, APIs and integrations. You will ensure scalable, secure, high-performance systems aligned with business requirements, working with stakeholders, architects, and cross-functional teams for end-to-end delivery.

You will design, implement, and deploy REST and WCF services, tune IIS deployments, and mentor peers.

Qualifications

• Bachelor’s Degree in Computer Science or related field.
• Hands-on 5+ years with .NET (C#) including desktop apps, Windows services, and ASP.NET.
• Experience with WCF and RESTful services and high-availability APIs.

Responsibilities

• Design, develop, and maintain .NET applications including desktop, Windows services, and web solutions.
• Lead development and integration of high-availability APIs and backend services.
• Implement secure and scalable REST and WCF services.
• Deploy on IIS with performance tuning and load balancing.
• Collaborate with stakeholders to refine requirements and translate them into specs.
• Perform impact analysis and solution design; troubleshoot and fix issues.

Skills

C#/.NET

Desktop apps

ASP.NET

WCF

REST APIs

SQL Server

Load balancing

Git

DevOps collaboration

Security best practices

Education

Bachelor's Degree in relevant field

Tools

Git

Visual Studio

Job description

This Full time on site position offers great opportunities for career growth.

About the Role

As a Senior .NET Developer, the individual takes a lead role in designing, developing, and maintaining robust software solutions across desktop applications, services, APIs, and integrations. They are responsible for delivering scalable and secure .NET-based systems that align with business requirements, while ensuring performance, reliability, and maintainability. The Senior .NET Developer works closely with business stakeholders, architects, and cross-functional teams to drive end-to-end solution delivery.

What We Need From You

• Design, develop, and maintain .NET applications including desktop, console, Windows services, and web-based solutions.
• Lead the development and integration of high-availability APIs and backend services.
• Implement and maintain secure and scalable REST and WCF services.
• Design and deploy applications on IIS with a focus on performance tuning and load balancing.
• Collaborate with business stakeholders to gather, analyze, and refine requirements.
• Translate business needs into functional and technical specifications.
• Perform impact analysis, scoping, and solution design.
• Troubleshoot application issues, conduct root cause analysis, and implement fixes.
• Optimize performance of code, database queries, and application behavior.
• Develop and integrate with SQL Server: tables, stored procedures, functions, views, and PLSQL where required.
• Integrate systems with third-party APIs and services including TCP/IP and WebSocket-based communication.
• Conduct code reviews and provide technical mentorship to other developers.
• Lead planning and estimation sessions, and ensure timely delivery of tasks.
• Work with version control systems (e.g., Git) and collaborative development workflows.
• Collaborate with infrastructure and DevOps teams to ensure smooth deployments and environment readiness.
• Work closely with QA for testing, validation, and bug fixing.
• Engage in ongoing reporting, system monitoring, and tuning activities.
• Participate in business meetings, requirement workshops, and sprint planning sessions.
• Ensure security best practices are followed in application design and implementation.
• Stay up to date on industry trends, emerging technologies, and recommend improvements to existing systems.
• Experience or exposure to telecom systems and protocols is considered a strong plus.
• Perform tasks as requested.

Qualifications and Experience

• Bachelor's Degree in relevant field ( Computer science, Programming)
• 5+ years of hands-on experience with .NET (C#), including desktop applications, Windows services, and ASP.NET.
• Telecom industry experience is a plus.
• Strong experience with console applications, libraries (DLLs), and service-oriented architectures.
• In-depth experience with WCF and RESTful services.
• Experience designing load-balanced, fault-tolerant, and high-availability APIs.
• Experience with version control systems (e.g., Git) and collaborative development workflows.
• Experience gathering business requirements, performing impact analysis, and documenting design specs.
• Strong experience integrating third-party services and protocols (e.g., TCP/IP, WebSockets).

Skills and Knowledge

• Solid knowledge of IIS configuration, hosting, troubleshooting, and tuning.
• Strong proficiency in Microsoft SQL Server: database design, indexing, stored procedures, PLSQL, and views.
• Proven ability to troubleshoot application, performance, and network-related issues.
• Excellent communication skills and experience working directly with business users.
• Strong planning and organizational skills - able to manage multiple tasks and meet deadlines.
• Understanding of security principles in .NET applications.
• Knowledge of reporting tools and performance diagnostics.