Top 100 C# Developers in the United Kingdom
The Best of December 2025Looking 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$25,000+2 - 9 employeesSHEFFIELD, EnglandRead More
Inflecto Systems, a software development company, is located in SHEFFIELD, United Kingdom. The firm provides custom software development, mobile app development, and business consulting and has a small team.The firm was founded in 2006.
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32$25,000+50 - 249 employeesSalford, EnglandIn Salford, England; London, England and Houston, Texas, Digiryte is a cloud consulting & SI company. They focus on cloud consulting & SI, Mobile App Development, Custom Software Development, Digital Strategy, and more and were founded in 2016.Read More
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NHSIndustries
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33$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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34$10,000+50 - 249 employeesBielsko-Biała, PolandAR/VR development company 4Experience was established in 2015. They are located in Bielsko-Biała, Poland; Johnsburg, Illinois; Dubai, United Arab Emirates and Whittlesey, England and have a midsize team. 4Experience focuses on AR/VR development, Custom Software Development, Graphic Design, Mobile App Development, and more.Read More
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NATO EOD COEIndustries
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35$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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36$50,000+250 - 999 employeesLondon, EnglandRead More
Opinov8 Digital and Engineering Solutions is a cloud consulting & SI company launched in 2017. The firm provides cloud consulting & SI, IT staff augmentation, BI & big data consulting & SI, Custom Software Development, and more and has a midsize team. The firm is located in London, England; Kyiv, Ukraine; Cairo, Egypt and Weybridge, England.
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Fortune 500 CompaniesIndustries
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37$10,000+50 - 249 employeesL'viv, UkraineRead More
Founded in 2019, Uinno is an artificial intelligence firm. The midsize team specializes in Artificial Intelligence, Custom Software Development, Low/No Code Development, UX/UI Design, and more. The company is based in L'viv, Ukraine; Tallinn, Estonia; Kingston upon Thames, England and Zaporizhzhia, Ukraine.
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OnlyFansIndustries
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38$50,000+50 - 249 employeesLondon, EnglandMetasite is a midsize software development firm established in 1997. Their services include Custom Software Development, Enterprise App Modernization, Generative AI, AI Agents, and more. The firm is based in Vilnius, Lithuania and London, England.Read More
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Man Group WTW BLME British LandIndustries
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39$1,000+10 - 49 employeesLondon, EnglandAR/VR development company Takeaway Reality was launched in 2020. The small London, England-based team specializes in AR/VR development, Custom Software Development, Business Consulting, Web Development, and more.Read More
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Microsoft FordIndustries
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40$50,000+50 - 249 employeesLondon, EnglandIntellectsoft is a software development company founded in 2007. The agency provides Custom Software Development, Mobile App Development, IT staff augmentation, Web Development, and more and has a midsize team. The agency is based in Miami, Florida; London, England; Oslo, Norway and Kyiv, Ukraine.Read More
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MitsubishiIndustries
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41$25,000+10 - 49 employeesChantry, EnglandRead More
Established in 2022, OnTheBlockGaming is a. The company offers and has a small team. The company is headquartered in , United Kingdom.
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OutboundlessIndustries
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42$10,000+10 - 49 employeesCoventry , EnglandImobisoft is an artificial intelligence company. The small team is in Coventry , England and London, England. Their services include Artificial Intelligence, Custom Software Development, Generative AI, Web Development, and more.Read More
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NHS (Multiple divisions)Industries
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43$25,000+50 - 249 employeesSutton, EnglandHeadquartered in Sutton, England and Houston, Texas, Geeks Ltd is a custom software development company. The midsize team focuses on Custom Software Development, Product Design, AI Consulting, Web Development, and more. The company was launched in 2007.Read More
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Search Acumen ChannelPorts BBC easyJetIndustries
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44$10,000+1,000 - 9,999 employeesLondon, EnglandXebia is a large cloud consulting & SI company launched in 2001. Their team provides cloud consulting & SI, IT strategy consulting, Custom Software Development, BI & big data consulting & SI, and more. The agency is in Wrocław, Poland; Rzeszów, Poland; Gdańsk, Poland and Atlanta, Georgia.Read More
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YellIndustries
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45$10,000+50 - 249 employeesLondon, EnglandAngry Nerds is a custom software development firm launched in 2015. The agency provides Custom Software Development, UX/UI Design, Web Development, and Mobile App Development and has a midsize team.Read More
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46$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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47$25,000+10 - 49 employeesYork, EnglandRead More
Thumbmunkeys Ltd is a mobile app development company based in York, United Kingdom. This company was founded in 2012 and has 25+ employees. Thumbmunkeys Ltd is responsible for mobile app development, web development, and wearable app development.
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CapitaIndustries
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48$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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49$1,000+250 - 999 employeesDubai, United Arab EmiratesAppsNation, 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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50$10,000+250 - 999 employeesHarrow, EnglandRishabh Software is a software development company. They are located in Vadodara, India; Harrow, England; San Jose, California and Bengaluru, India and have a midsize team. Their services include Custom Software Development, Digital Engineering, BI & big data consulting & SI, cloud consulting & SI, and more. The firm was established in 1999.Read More
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LindeIndustries
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51$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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52$10,000+10 - 49 employeesLondon, EnglandHeadChannel Consulting, a software development company, is based in London, England; Katowice, Poland and New York, New York. The small team provides Custom Software Development, Artificial Intelligence, UX/UI Design, Web Development, and more and was founded in 2004.Read More
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The William Pears GroupIndustries
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53$50,000+10 - 49 employeesManchester , EnglandRead More
Founded in 2010, Silverchip is located in Manchester, United Kingdom. Their team of 13 employees provides mobile app development and custom software development services for enterprise, midmarket, and small businesses.
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Suits Me BankingIndustries
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54$25,000+10 - 49 employeesTirana, AlbaniaAtraX 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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55Undisclosed10 - 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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56$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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57$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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58$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 -
59$50,000+50 - 249 employeesLondon, EnglandSigli is a software development company. Their midsize team is in Antwerpen, Belgium; Vilnius, Lithuania; London, England and Amsterdam, Netherlands. The agency offers Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, AI Consulting, and more. The agency was established in 2015.Read More
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Sensotec NVIndustries
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60$25,000+10 - 49 employeesLondon , EnglandRead More
AVAMAE is a software solutions agency run by a team of fewer than 50 professionals founded in 2011. Based in London, the company offers custom software, web, and mobile app development services for small and medium-sized businesses from various industries, such as business services, financial services, and health care.
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BetDSIIndustries
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