Top 100 C# Developers in the United Kingdom
The Best of October 2026Looking for a top C Sharp software development company in the United Kingdom?
The programming language C Sharp (C#), is general-purpose and used for web and mobile apps. It has a number of advantages: It's object-oriented, has automatic garbage collection, functions across platforms, has backward compatibility, and integrates well with other platforms and services.
To assist you in your search for a partner, we’ve compiled this list of the top C# developers in United Kingdom. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best United Kingdom C Sharp (C#) Software Development Companies
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31$1,000+250 - 999 employeesLeeds, EnglandAppsNation, a mobile app development firm, is in Los Angeles, California; Los Angeles, California; Dubai, United Arab Emirates and Dallas, Texas. The midsize team provides Mobile App Development, AR/VR development, Low/No Code Development, Custom Software Development, and more and was founded in 2016.Read More
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32$50,000+50 - 249 employeesLondon, EnglandLaunched in 2007, Intellectsoft is a software development firm. The company specializes in Custom Software Development, Artificial Intelligence, Mobile App Development, IT staff augmentation, and more and has a midsize team.Read More
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33$50,000+250 - 999 employeesFarnborough, EnglandOne Beyond is an UX design company. Their midsize team is headquartered in Farnborough, England; Madrid, Spain; Budapest, Hungary and Szeged, Hungary. The firm focuses on UX/UI Design, IT strategy consulting, cloud consulting & SI, IT staff augmentation, and more.Read More
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Smith & NephewIndustries
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34$50,000+250 - 999 employeesLondon, EnglandOpinov8 Digital and Engineering Solutions is an AI Consulting company founded in 2017. The midsize London, England-based team focuses on AI Consulting, Custom Software Development, Artificial Intelligence, IT staff augmentation, and more.Read More
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Fortune 500 Companies Renault Swisscom McDonald'sIndustries
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35Undisclosed10 - 49 employeesLondon, EnglandBlue Ripples Technologies Private Limited is a software development company headquartered in Kulathoor, India; London, United Kingdom and Thiruvananthapuram, India. The midsize agency was launched in 2012. Their team provides custom software development, IoT development, Artificial Intelligence, and other application development.Read More
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36$50,000+50 - 249 employeesBelfast, Northern IrelandRead More
Instil Software is a software engineering firm based in Belfast, Northern Ireland. Founded in 2005, Instil has about 30 employees that work across a variety of industries. They offer custom software development, mobile app development, cloud consulting and software integration, IoT, and web development.
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37$25,000+10 - 49 employeesLondon, EnglandAtraX is a small IT strategy consulting company. The Tirana, Albania-based company was established in 2015. Their services include IT strategy consulting, IT staff augmentation, Custom Software Development, Web Development, and more.Read More
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38$25,000+50 - 249 employeesLondon, EnglandRead More
Global Talent is an IT firm based in London with more than 50 experts. Since their founding in 2017, they have provided IT staff augmentation, custom software development, and IT strategy consulting solutions for clients ranging from small firms to large companies.
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VodoriIndustries
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39$25,000+1,000 - 9,999 employeesLondon, EnglandItransition is a large ERP consulting and SI company established in 1998. Their services include ERP consulting and SI, Custom Software Development, CRM consulting and SI, Artificial Intelligence, and more. The agency is based in Decatur, Georgia; London, England; Vilnius, Lithuania and Warszawa, Poland.Read More
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ExpediaIndustries
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40$25,000+50 - 249 employeesSutton, EnglandFounded in 2007, Geeks Ltd is a software development firm. Their midsize team is headquartered in Sutton, England and Houston, Texas. Their services include Custom Software Development, Artificial Intelligence, AI Consulting, Mobile App Development, and more.Read More
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London School of Innovation (LSI) Search Acumen BBC easyJetIndustries
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41$25,000+10 - 49 employeesManchester, EnglandRead More
VTS Software is software development company located in Manchester, U.K. Since 2007, their small team of around 5 has been specializing in custom software, web, and mobile app development for small and mid-sized businesses alike. They have experience in a variety of industries such as advertising, healthcare, manufacturing, and business services.
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Whispering SmithIndustries
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42$5,000+2 - 9 employeesNorthampton, EnglandRead More
Full Metal Software is a bespoke software development agency located in Northampton, England. Founded in 2004, they have three employees specializing in full stack web development and innovative business solutions for small and midmarket companies, typically in business services, finance, and healthcare. Services include project management, code updating, CMS support, software development, and outsourcing.
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YourGene HealthIndustries
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43$10,000+10 - 49 employeesSouthend-on-Sea, EnglandRead More
Software agency Atlas - Clever Software is headquartered in Essex and another office in London. With 17 employees, the agency specializes in web, custom software, mobile app development, and more for mainly midmarket businesses.
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BarclaysIndustries
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44$25,000+10 - 49 employeesNewcastle upon Tyne, EnglandRead More
Readysalted Design Ltd, a web design agency, was founded in 2003. They are headquartered in Newcastle upon Tyne, United Kingdom and have a small team. Their services include web design, web development, mobile app development, print design, and more.
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SageIndustries
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45$25,000+50 - 249 employeesRatby, EnglandEvolved Ideas, a custom software development firm, is based in Ratby, England and Kyiv, Ukraine. The midsize team specializes in Custom Software Development, IT staff augmentation, Mobile App Development, Web Development, and more. The company was founded in 2007.Read More
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e-bateIndustries
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46$10,000+2 - 9 employeesBristol, EnglandApplication development firm Blue Sparrow was launched in 2015. The company offers Mobile App Development, Custom Software Development, Artificial Intelligence, and AR/VR development and has a small team. The company is in Bristol, England.Read More
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FanHub -
47$50,000+50 - 249 employeesLondon, EnglandSigli, an IT strategy consulting company, is located in Antwerpen, Belgium; Vilnius, Lithuania; London, England and Amsterdam, Netherlands. The midsize agency was founded in 2015. Their services include IT strategy consulting, Custom Software Development, Low/No Code Development, IT staff augmentation, and more.Read More
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Sensotec NVIndustries
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48$10,000+2 - 9 employeesSheffield, EnglandSVAIY ART is a Sheffield, England-based AR/VR development company. The small team specializes in AR/VR development, Video Production, Custom Software Development, and Blockchain and was founded in 2020.Read More
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Katana Inu Mars4 Monday ArigamiIndustries
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49$5,000+10 - 49 employeesLondon, EnglandAuthentic Digital, an UX design company, was launched in 2010. They are located in London, England; Hong Kong, Hong Kong and Kraków, Poland and have a small team. Authentic Digital offers UX/UI Design, Web Design, Custom Software Development, Blockchain, and more.Read More
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J.P. Morgan Asset ManagementIndustries
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50$10,000+10 - 49 employeesPreston, EnglandWozify is a web development firm. They specialize in Web Development, Custom Software Development, Mobile App Development, Artificial Intelligence, and more and were launched in 2012. Their small team is Budapest, Hungary-based.Read More
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AuchanIndustries
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51$10,000+250 - 999 employeesLondon, EnglandInstinctools is a midsize software development company established in 2000. Their team provides Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, Mobile App Development, and more. The company is headquartered in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware.Read More
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Daimler Fujitsu Nostrum SpexAIIndustries
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52$5,000+50 - 249 employeesHarrow, EnglandIQlance Solutions LLC is a midsize custom software development company. The Toronto, Canada-based company was established in 2016. Their services include Custom Software Development, Mobile App Development, IT staff augmentation, Artificial Intelligence, and more.Read More
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53$1,000+10 - 49 employeesLondon, EnglandTakeaway Reality is an artificial intelligence firm launched in 2020. Their small team is headquartered in London, England and Zagreb, Croatia. Their services include Artificial Intelligence, Custom Software Development, AR/VR development, AI Consulting, and more.Read More
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Microsoft FordIndustries
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54$10,000+50 - 249 employeesWhittlesey, EnglandMidsize AR/VR development company 4Experience, is located in Bielsko-Biała, Poland; Johnsburg, Illinois; Dubai, United Arab Emirates and Whittlesey, England. They offer AR/VR development, Custom Software Development, Artificial Intelligence, Graphic Design, and more and were established in 2015.Read More
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NATO EOD COEIndustries
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55$10,000+50 - 249 employeesLondon, EnglandLaunched in 2015, Angry Nerds is a custom software development firm. The firm specializes in Custom Software Development, UX/UI Design, Web Development, and Mobile App Development and has a midsize team. The firm is in Wrocław, Poland; London, England; Atlanta, Georgia and Toronto, Canada.Read More
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56$25,000+250 - 999 employeesLondon, EnglandRobosoft Technologies Inc. Is a San Francisco, California-based app development company. They offer Mobile App Development, UX/UI Design, Web Development, Custom Software Development, and more and were launched in 1996.Read More
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Warner Bros. Discovery HSBC McDonalds Mercury FinanceIndustries
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57$25,000+250 - 999 employeesLondon, EnglandAI Engineering by Grid Dynamics, an IT staff augmentation company, is based in Zug, Switzerland; Wormerveer, Netherlands and London, England. They offer IT staff augmentation, Custom Software Development, and IT strategy consulting and were established in 1999.Read More
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58$25,000+50 - 249 employeesLondon, EnglandIncepteo Labs is a midsize artificial intelligence development company. The London, England-based company was founded in 2007. Their services include Artificial Intelligence, Mobile App Development, UX/UI Design, Custom Software Development, and more.Read More
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GeodisIndustries
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59$5,000+2 - 9 employeesColchester, EnglandRead More
Chick Digital, a website development firm, was established in 2015. The small team offers web development, BI & big data consulting & SI, custom software development, and Artificial Intelligence. The company is in Colchester, United Kingdom.
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Gay TimesIndustries
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60$25,000+10 - 49 employeesLondon, EnglandLaunched in 2006, Amexis Ltd is a cloud consulting & SI company. Their small team is in Sofia, Bulgaria; Plovdiv, Bulgaria; London, United Kingdom and Katy, Texas and offers cloud consulting & SI, IT managed services, custom software development, Artificial Intelligence, and more.Read More
Industries
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