Top 100 C# Developers in Warsaw
The Best of October 2026Looking for a top C Sharp software development company in Warsaw?
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 Warsaw. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best Warsaw C Sharp (C#) Software Development Companies
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1$25,000+50 - 249 employeesWarszawa, PolandHeadquartered in L'viv, Ukraine; Warszawa, Poland and Markham, Canada, Reenbit is a software development firm. The midsize firm was established in 2018. Their team focuses on Custom Software Development, Artificial Intelligence, BI & big data consulting & SI, Enterprise App Modernization, and more.Read More
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CloudBooking Glowi EClou DataloopIndustries
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2$10,000+250 - 999 employeesWarszawa, PolandScalo is a custom software development firm. They are based in Wrocław, Poland; Kraków, Poland; Warszawa, Poland and Katowice, Poland and have a midsize team. Their services include Custom Software Development, AI Consulting, Artificial Intelligence, IT staff augmentation, and more. The firm was founded in 2007.Read More
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BNP Paribas, Pagaya, ING, Santander, Daimler TB.LX, Zooplus, Tabnine, Backbase, Change DonationsIndustries
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3$50,000+1,000 - 9,999 employeesWarszawa, PolandRead More
Pentalog is a large Brașov, Romania-based custom software development company. Established in 1993, the team offers custom software development, IT staff augmentation, e-commerce development, and web development.
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AdidasIndustries
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4$25,000+1,000 - 9,999 employeesWarszawa, PolandRead More
Ailleron S.A., a digital strategy company, is in Kraków, Poland. The midsize firm was established in 2014. Their team focuses on digital strategy, enterprise app modernization, mobile app development, custom software development, and more.
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5$50,000+1,000 - 9,999 employeesWarszawa, PolandSigma Software Group, a custom software development company, was launched in 2002. Their large team is located in L'viv, Ukraine; New York, New York; Saratoga, California and Bellevue, Washington and offers Custom Software Development, Mobile App Development, Web Development, BI & big data consulting & SI, and more.Read More
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VolvoIndustries
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6$10,000+50 - 249 employeesWarszawa, PolandRead More
Lightpoint Global is a development company with 41 employees that is based in Minsk, Belarus. Since being founded in 2011, they have focused on web development, big data consulting, and cloud consulting. They work with both small and mid market businesses in mainly media, education, and financial services.
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LufthansaIndustries
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7$25,000+250 - 999 employeesWarszawa, PolandAltkom Software is a Warszawa, Poland-based custom software development firm. They specialize in Custom Software Development, Mobile App Development, Enterprise App Modernization, and cloud consulting & SI and were launched in 2000.Read More
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BNP ParibasIndustries
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8$10,000+50 - 249 employeesWarszawa, PolandRead More
RichBrains is a custom software development firm. Established in 2006, the midsize firm is headquartered in Vilnius, Lithuania and Warszawa, Poland. Their services include Custom Software Development, Web Development, cloud consulting & SI, Mobile App Development, and more.
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9$25,000+50 - 249 employeesWarszawa, PolandRead More
LeanCode, a mobile application development company, is based in Warszawa, Poland. The midsize agency was launched in 2016. Their services include Mobile App Development, Custom Software Development, and IT strategy consulting.
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Virgin Money Sonova Millennium Bank Credit Agricole Bank PolskaIndustries
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10$10,000+50 - 249 employeesWarszawa, PolandCeladonsoft is a software development company based in Warszawa, Poland; Dubai, United Arab Emirates; Lisboa, Portugal and Richmond, Virginia. The midsize company was launched in 2016. Their services include Custom Software Development, Artificial Intelligence, Mobile App Development, and Web Development.Read More
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Veil Talented Music App L'ETO EIEVIndustries
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11$50,000+50 - 249 employeesWarszawa, PolandBlackthorn Vision is a midsize software development company. They provide Custom Software Development, Artificial Intelligence, Enterprise App Modernization, and IT managed services and were established in 2009. The firm is headquartered in Austin, Texas; Warszawa, Poland and L'viv, Ukraine.Read More
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SensiaIndustries
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12$50,000+50 - 249 employeesWarszawa, PolandDevox Software, a custom software development firm, is based in Miami, Florida; Warszawa, Poland; Kyiv, Ukraine and Lauderdale Lakes, Florida. The agency provides Custom Software Development, Enterprise App Modernization, Artificial Intelligence, and AI Consulting and has a midsize team.The agency was launched in 2018.Read More
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Function4Industries
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13$10,000+50 - 249 employeesWarszawa, PolandRead More
Eyzee is a custom software development company. The midsize Warszawa, Poland-based agency was established in 2017. Their services include custom software development, enterprise app modernization, cloud consulting & SI, application testing, and more.
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Ministry of Digital Affairs Republic of PolandIndustries
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14$50,000+1,000 - 9,999 employeesWarszawa, PolandIT strategy consulting company Software Mind S.A. Is in Kraków, Poland; Warszawa, Poland; Rzeszów, Poland and Bielsko-Biała, Poland. Launched in 1999, the large team focuses on IT strategy consulting, cloud consulting & SI, Custom Software Development, AI Agents, and more.Read More
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Backbase Baillie Gifford A1 CallcreditIndustries
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15$5,000+1,000 - 9,999 employeesWarszawa, PolandALTEN Polska, an Engineering company, was launched in 2009. Their large team is headquartered in Warszawa, Poland; Kraków, Poland and Gdańsk, Poland and provides Engineering, Staffing, Custom Software Development, cloud consulting & SI, and more.Read More
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16$1,000+10 - 49 employeesWarszawa, PolandRead More
StoryMode is a game development studio in Minsk, Belarus. Founded in 2018, they have about 15 employees that serve mostly small-business clients in the gaming industry. Services include custom software, mobile app, and AR/VR development.
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Saber InteractiveIndustries
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17$25,000+250 - 999 employeesWarszawa, PolandAltoros is a midsize Blockchain company. Founded in 2001, the firm is based in Pleasanton, California; Buenos Aires, Argentina; Oslo, Norway and Helsinki, Finland. Their team offers Blockchain, Custom Software Development, Web Development, Enterprise App Modernization, and more.Read More
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AllstateIndustries
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18$25,000+250 - 999 employeesWarszawa, PolandCivitta is an artificial intelligence company established in 2013. The midsize Tallinn, Estonia-based team offers Artificial Intelligence, Custom Software Development, cloud consulting & SI, Enterprise App Modernization, and more.Read More
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Global Airlines AI Front Desk BL.INK Franchise RampIndustries
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19$100,000+1,000 - 9,999 employeesWarszawa, PolandN-iX is a business intelligence company. The large North Miami Beach, Florida-based team offers BI & big data consulting & SI, Artificial Intelligence, Custom Software Development, cloud consulting & SI, and more. The agency was founded in 2002.Read More
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Bosch Siemens eBay Total EnergiesIndustries
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20$50,000+1,000 - 9,999 employeesWarszawa, PolandRead More
Infopulse is an end-to-end digital services and advisory company based in Ukraine with additional offices across Europe and the Americas. Founded in 1991, their team of 2,300+ specialists offers solution engineering, managed services, innovation services, digital experience & intelligent business solutions. They work with SMBs and Fortune 100 enterprises, focusing on banking, energy, oil & gas, healthcare, telecom, information technology, and other industries.
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BICSIndustries
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21$25,000+250 - 999 employeesWarszawa, PolandFabrity is a software development firm. In Warszawa, Poland; Rzeszów, Poland; Łódź, Poland and Białystok, Poland, their midsize team focuses on Custom Software Development, IoT development, Artificial Intelligence, Web Development, and more. The agency was launched in 2007.Read More
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ABBIndustries
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22$250,000+250 - 999 employeesWarszawa, PolandRead More
JCommerce is a software company based in Katowice, Poland, with offices in six other cities in Poland. Founded in 2005, the team of 318 specializes in custom software development, IT staff augmentation, and BI and big data consulting and SI. They work primarily with midmarket, focusing on information technology, manufacturing, and financial services.
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Aras CorpIndustries
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23$25,000+50 - 249 employeesWarszawa, PolandRead More
Ideo Agency is a full-service software house based in Rzeszów, Poland with offices in Warsaw, Poland, and Drammen, Norway. Since its start in 1999, their team of more than 50 has provided custom software development, web development, e-commerce development, and digital design and marketing services.
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Aarsleff Ground EngineeringIndustries
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24$25,000+1,000 - 9,999 employeesWarszawa, PolandItransition 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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25$25,000+50 - 249 employeesWarszawa, PolandRead More
Vimanet is a software development company located in Krakow, Poland. Founded in 2007, its team of about 20 specializes in custom software development and web development.
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4subseaIndustries
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26$10,000+10 - 49 employeesWarszawa, PolandRead More
GoOnline is a team of 40+ engineering & design geeks, who help companies of all sizes turn ideas into products that make life easier. The company was founded in 2008; and in the next years, its offices were set up in Kraków, London, Gothenburg, and Copenhagen. They specialize in mobile and desktop app development, web development, business intelligence, AI, IoT, DevOps, and cloud solutions.
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EgmontIndustries
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27$5,000+250 - 999 employeesWarszawa, PolandSaM Solutions is a Gilching, Germany-based IoT development company. The midsize team specializes in IoT development, IT staff augmentation, Custom Software Development, E-Commerce Development, and more. The agency was established in 1993.Read More
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28$25,000+50 - 249 employeesWarszawa, PolandRead More
Founded in 2018, Qodeca has focused on building management systems, user-facing applications, integrations, and server-side solutions on top of the latest IT solutions from Microsoft like .NET and Azure. With above 70 employees in Poland, they support all software product lifecycle stages by providing UX/UI design, custom software development, cloud, DevOps, and beyond services. They work mainly with middle-market clients and enterprises providing them with the whole toolset required to succeed.
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The Bay Club CompanyIndustries
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29$50,000+250 - 999 employeesWarszawa, PolandYalantis is an IoT development company. Launched in 2008, the firm is in Warszawa, Poland and Tallinn, Estonia. The midsize team provides IoT development, Custom Software Development, Artificial Intelligence, Contract Manufacturing, and more.Read More
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Home Connect for Bosch Toyota Tsusho X (Google X) ZillowIndustries
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30$10,000+50 - 249 employeesWarszawa, PolandLocated in Kyiv, Ukraine; San Francisco, California and Warszawa, Poland, Kevuru Games is a software development company. The midsize company was founded in 2011. Their services include Custom Software Development, Mobile App Development, Other Application Development, and UX/UI Design.Read More
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Epic Games Lucasfilm Electronic Arts Bandai NamcoIndustries
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