The Vital Guide to C# Interviewing

C# came in as a new kid on the block. At first it was ignored, then it was ridiculed, and then it was fought against, but now it continues to win over developers all over the world. The direct result of this growth is a large number of developers that are using C#. This guide covers topics that every C# developer needs to have mastered, and is essential when making your next hire.

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John R. KosinskiThailand
As a full-stack mobile developer, John has been developing since around 2000. Early on he did some C++, ASP, VB6, and other things; since .NET came out most of his work has been in .NET. His work experience up until 2009 was in the NYC and NYC area; since 2009 he's been living and working in Thailand. Currently he's consulting remotely for US clients, and working on iOS and Android projects.
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Patrick RyderUnited States
Pat has over a dozen years of experience developing applications on the .NET platform, including having been part of the development team at Microsoft which created the platform itself. He also develops for Windows native API (Win32/COM), he communicates extremely well, and he has worked in teams of all sizes.
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Konstantin StartsevRussia
Konstantin has 9+ years of software engineering experience, including a number of great jobs working with big companies and many jobs with start-up companies and medium-sized mobile and web agencies. Over the past few years, he has been developing web solutions for the automation of business processes using C# and ASP.NET MVC or Java with Play! Framework and various front-end frameworks (e.g., jQuery, AngularJS, KnockoutJS, TypeScript, etc.).
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Anne AdamsUnited Kingdom
After building financial trading applications for 8 years as an engineer at Merrill Lynch, Anne has since gone on to found and build LoudUp, a music-based social network that she designed, built, and launched from the ground up. She specializes in .NET technologies and JavaScript.
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Charles Cook, Ph.D.United States
Charles has a Ph.D. in aerospace engineering and spent three years developing custom data processing and analysis programs for NASA. He specializes in scalable, enterprise-level application development and engineering solutions for exceptionally high throughputs. He is also the founder and owner of GreatVocab.com, for which he developed the core system using novel concepts in data analysis and control theory.
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Richard HardebeckUnited Kingdom
Richard has worked at a broad range of companies from small startups to large multinationals with often overlapping roles of software developer, quantitative analyst, and financial market professional. He is comfortable with all aspects of software development, from writing efficient algorithms and data structures, designing full system architectures, and managing and improving interfaces with legacy code.
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Dmitry PavlovRussia
Dmitry is a senior .NET and C# developer with over 10 years of experience in creating web applications. He has received the Microsoft MVP (Visual C#) Award 7 times since 2008 and is a capable team leader. Dmitry has also achieved a MS in Computer Sciences and MS in Structural Geology and Modeling.
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Richard RozsaNetherlands
Richard Rozsa offers a vision of data as a self formatting entity. For more than 30 years, he's delivered top quality technical architecture, programming, testing and solutions for complex problems--on-time and within budget. He's extremely flexible and able to integrate as a standalone freelancer or within teams.
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Johan HernandezColombia
Johan is a mobile app and cloud back-end developer with over 15 years of experience. He's been telecommuting for startups in the USA since 2010. He has worked with enterprise stacks for a number of years, but more recently his primary focus has been on building native apps for mobile and desktop (Mac, iOS, Android and Windows) using Swift, Objective-C, Java, Kotlin, and C#. He also builds his own RESTful back-ends with Rails, Node, and Golang.
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Victor BuenoUnited Kingdom
Victor is a seasoned .NET developer with over 17 years of experience focusing on the Microsoft technology stack. He develops a wide range of software, including web apps, back-end services, databases, and mobile apps. He is particularly interested in high-performance multi-threaded development.
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C# is a modern, general purpose, object-oriented programming language designed around the Common Language Infrastructure. A great C# developer is capable of handling many aspects of developing an application, including but not limited to performance, scalability, security, testing, and more. C# developers can develop modern applications that run on desktop computers, or even sophisticated back-end processes powering modern web applications. The frameworks .Net and Mono combined allow a wide range of platforms to be targeted by applications developed with C#.

Writing a good job description and job advertisement for a C# developer requires an emphasis to be placed on the specific technologies necessary for the project. When you are looking for an advanced C# developer to fill a specific niche, posting a generic C# developer description in your job ad will bring numerous applications from people who are unfamiliar with the required technologies, or have very limited knowledge of the language and platform as a whole.

This article will provide you with a sample C# developer job description that will help you write the perfect job ad, and assure that you easily find and hire the person that matches your specific criteria.

C# Developer - Job Description and Ad Template

Company Introduction

{{Write a short and catchy paragraph about your company. Make sure to provide information about the company culture, perks, and benefits. Mention office hours, remote working possibilities, and everything else you think makes your company interesting.}}

Job Description

We are looking for a C# developer responsible for building C# applications, including anything from back-end services to their client-end counterparts. Your primary responsibilities will be to design and develop these applications, and to coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is essential.

Responsibilities

  • Translate application storyboards and use cases into functional applications
  • Design, build, and maintain efficient, reusable, and reliable C# code
  • Ensure the best possible performance, quality, and responsiveness of applications
  • Identify bottlenecks and bugs, and devise solutions to these problems
  • Help maintain code quality, organization, and automatization
  • {{Add other responsibilities here that are relevant}}

Skills

  • Proficient in C#, with a good knowledge of its ecosystems
  • Familiarity with the .NET framework {{you may specify particular versions based on your requirements}}
  • Familiarity with the Mono framework {{if needed}}
  • Strong understanding of object-oriented programming
  • Skill for writing reusable C# libraries
  • Familiar with various design and architectural patterns
  • Knowledge of concurrency patterns in C#
  • Familiarity with Microsoft SQL Server {{if deemed necessary for the project needs}}
  • Experience with popular web application frameworks, such as Nancy
  • Familiarity with Windows Presentation Framework {{if needed}}
  • Knack for writing clean, readable C# code
  • Understanding fundamental design principles behind a scalable application
  • Creating database schemas that represent and support business processes
  • Basic understanding of Common Language Runtime (CLR), its limitations, weaknesses, and workarounds
  • Implementing automated testing platforms and unit tests
  • Proficient understanding of code versioning tools {{such as Git, SVN, and Mercurial}}
  • Familiarity with continuous integration
  • {{Make sure to mention any frameworks, libraries, or any other technology relevant to your project}}
  • {{List education level or certification you require}}
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