Top 100 C# Developers in Warsaw
The Best of December 2025Looking 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$50,000+1,000 - 9,999 employeesBudapest, HungaryRead More
Headquartered in L'viv, Ukraine; New York, New York; Saratoga, California and Bellevue, Washington, Sigma Software Group is a software development company. The large agency was established in 2002. Their services include Custom Software Development, Web Development, Mobile App Development, BI & big data consulting & SI, and more.
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VolvoIndustries
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2$50,000+1,000 - 9,999 employeesWarszawa, PolandRead More
Software Mind S.A., an IT strategy consulting company, is headquartered in Kraków, Poland; Warszawa, Poland; Rzeszów, Poland and Bielsko-Biała, Poland. The large team focuses on IT strategy consulting, cloud consulting & SI, Cybersecurity, Custom Software Development, and more and was founded in 1999.
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Backbase Baillie Gifford Branch CallcreditIndustries
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3$10,000+250 - 999 employeesKraków, PolandEstablished in 2007, Scalo is a software development firm. Their midsize team is headquartered in Austin, Texas; Kraków, Poland; Warszawa, Poland and Katowice, Poland. Their services include Custom Software Development, BI & big data consulting & SI, IT managed services, IT staff augmentation, and more.Read More
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BNP Paribas, Pagaya, ING, Santander, Daimler TB.LX, Zooplus, Tabnine, Backbase, Change DonationsIndustries
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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 employeesLa Chapelle-Saint-Mesmin, FranceRead 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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6$25,000+50 - 249 employeesWarszawa, PolandReenbit, a data analytics company, is based in L'viv, Ukraine; Warszawa, Poland and Markham, Canada. The midsize team focuses on BI & big data consulting & SI, Custom Software Development, Enterprise App Modernization, cloud consulting & SI, and more and was founded in 2018.Read More
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CloudBooking Glowi EClou DataloopIndustries
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7$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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8$25,000+250 - 999 employeesHelsinki, FinlandAltoros 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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9$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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10$5,000+250 - 999 employeesMcKinney, TXRead More
ScienceSoft USA Corporation, doing business as ScienceSoft, is an IT consulting and software development company with 36 years of experience. We deliver secure healthcare, financial, and cross-industry software backed by AI expertise.
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Ford Motor CompanyIndustries
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11$25,000+250 - 999 employeesWarszawa, PolandITMAGINATION, a midsize custom software development company, is headquartered in Warszawa, Poland. Established in 2008, the team offers Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, Artificial Intelligence, and more.Read More
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American Express (previously Kabbage)Industries
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12$10,000+50 - 249 employeesWarszawa, PolandRead More
In Warszawa, Poland; Dubai, United Arab Emirates; Lisboa, Portugal and Richmond, Virginia, Celadonsoft is a custom software development firm. The company offers Custom Software Development, Artificial Intelligence, Web Development, Mobile App Development, and more and is midsize.The company was established in 2016.
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Veil Talented Music App L'ETO EIEVIndustries
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13$10,000+1,000 - 9,999 employeesWarszawa, PolandRead More
Innowise is a global custom software development and IT staff augmentation company headquartered in Warsaw, Poland. Since its foundation in 2007, the company has delivered projects for enterprises and start-ups in finance, healthcare, manufacturing, e-commerce, energy and other domains. They have a team of over 3,000 in-house software engineers.
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TopconIndustries
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14$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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15$25,000+1,000 - 9,999 employeesVilnius, LithuaniaItransition is a custom software development company founded in 1998. Their large team is located in Denver, Colorado; London, England; Vilnius, Lithuania and Warszawa, Poland and specializes in Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, ERP consulting and SI, and more.Read More
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ExpediaIndustries
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16$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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17$100,000+1,000 - 9,999 employeesKyiv, UkraineN-iX, a big data analytics company, was founded in 2002. In North Miami Beach, Florida; Malmö, Sweden; North Miami Beach, Florida and Kraków, Poland, their large team provides BI & big data consulting & SI, Artificial Intelligence, Custom Software Development, cloud consulting & SI, and more.Read More
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Bosch Siemens eBay Total EnergiesIndustries
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18$50,000+250 - 999 employeesWarszawa, PolandRead More
Midsize IoT development company Yalantis, is in Warszawa, Poland; L'viv, Ukraine; Larnaca, Cyprus and Dnipro, Ukraine. Founded in 2008, the team specializes in IoT development, BI & big data consulting & SI, Custom Software Development, Artificial Intelligence, and more.
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Toyota Tsusho Zillow X (Google X) KPMGIndustries
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19$10,000+250 - 999 employeesWarszawa, PolandRead More
Launched in 2000, *instinctools is a software development company. The midsize team specializes in Custom Software Development, Web Development, IT strategy consulting, Mobile App Development, and more. The firm is in Stuttgart, Germany; Warszawa, Poland; Mississauga, Canada and Wilmington, Delaware.
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Daimler Fujitsu Nostrum SpexAIIndustries
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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$50,000+50 - 249 employeesWarszawa, PolandRelevant Software, a software development firm, is in L'viv, Ukraine; Warszawa, Poland and Ademuz, Spain. The midsize firm was launched in 2013. Their services include Custom Software Development, IoT development, IT staff augmentation, Web Development, and more.Read More
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22$25,000+50 - 249 employeesWarszawa, PolandDevox Software is a midsize Enterprise App Modernization company established in 2018. Their services include Enterprise App Modernization, Custom Software Development, Artificial Intelligence, and Generative AI. The agency is located in Miami, Florida; Warszawa, Poland; Kyiv, Ukraine and Lauderdale Lakes, Florida.Read More
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Function4Industries
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23$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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24$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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25$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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26$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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27$10,000+250 - 999 employeesWarszawa, PolandElinext is a software development firm. They are in Warszawa, Poland; Тоshkent, Uzbekistan; Ho Chi Minh City, Vietnam and T'bilisi, Georgia and have a midsize team. Their services include Custom Software Development, Mobile App Development, Application Testing, Web Development, and more.Read More
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Parrot Broadcom Volkswagen Venna Insurance GroupIndustries
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28$10,000+50 - 249 employeesWarszawa, PolandLaunched in 2017, SmartTek Solutions is a custom software development company. The company offers Custom Software Development, Web Development, ERP consulting and SI, and AR/VR development and has a midsize team. The company is in L'viv, Ukraine; Warszawa, Poland; București, Romania and Austin, Texas.Read More
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29$10,000+50 - 249 employeesWarszawa, PolandRead More
App development company Brights was established in 2011. Their midsize team is in Warszawa, Poland; Kyiv, Ukraine and New York, New York. Their services include Mobile App Development, Generative AI, UX/UI Design, Product Design, and more.
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Philip Morris Suzuki Microsoft DanoneIndustries
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30$50,000+10 - 49 employeesWarszawa, PolandRead More
Iomico, an IoT development company, is in Warszawa, Poland; Sunnyvale, California; Edmonds, Washington and Buenos Aires, Argentina. The small team provides IoT development, Product Design, Custom Software Development, and Mobile App Development. The agency was established in 2012.
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Glomex SrlIndustries
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