Looking 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. If you need more support, tell us about your project, and we'll match you with recommended companies.

List of the Best Warsaw C Sharp (C#) Software Development Companies

  • 1
    $10,000+
    1,000 - 9,999 Employees
    Warszawa Poland

    Founded in 1998 in Denver, Itransition now has multiple offices in the U.S., U.K., E.U., and locations in eastern Europe housing more than 2,200 employees. They help power enterprises and SMBs globally with their digital solutions in the areas of business process automation, AI, data analytics, customer experience, and others. 

    Clients
    Adidas
    Ebay
    Toyota
    PayPal
    Industries
    Notable Project

    Itransition has cooperated with an insurance platform since 2017, helping them launch multiple products. They helped grow the project team to more than 60 professionals, including developers, business intelligence resources, and QA engineers. Itransition stays with the insurance platform to deliver ongoing improvements to their well-received digital projects.

    "A key attribute they possess is the ability and willingness to provide valuable feedback and ideas. They're collaborative and flexible." – CTO, Insurance Platform

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  • 2
    $5,000+
    1,000 - 9,999 Employees
    Warszawa Poland

    Euvic is an IT service provider specializes in custom software development, mobile app development, and web development. They were founded in 2004 in Gliwice, Poland, and have satellite offices in Warsaw, Leverkusen, Germany, Katowice, Poland, and Bielsko-Biala, Poland, and Mahwah, New Jersey.  They have a large team of around 350 employees who primarily service midmarket and small business clients. 

    Clients
    Arbor Seed Consulting
    Energa
    LexisNexis
    Geant
    Industries
    Notable Project

    Euvic developed a small-scale desktop application for commodity traders in the British market. Over time, their work expanded to provide additional features and functionalities for their development product. 

    "[Euvic] has proven easy to do business with which is a major benefit." – Owner, Commodity Trading Software Company 

  • 3
    $50,000+
    1,000 - 9,999 Employees
    Warszawa Poland

    Avenga is a global IT and digital transformation consultancy with over 20 years of experience for verticals such as pharma & life science, insurance and finance. Avenga has more than 2500 professionals with offices in Germany, Poland, Ukraine, the U.S., and Malaysia. Services include digital strategy & CX, custom software development, staffing, as well as Salesforce consulting, big data, and cloud solutions.

    Clients
    Roche
    GSK
    Credit Suisse
    QPharma
    Industries
    Notable Project

    Avenga built analytics databases for an insurance tech company. They analyzed and proposed improvements before executing on a new product from scratch. The client was impressed with the accuracy and easy movement of the data sets. 

    "They always ask key questions and they have a vision of what our company is trying to do, and how they’re contributing to that effort." – Data Engineer, Insurance Tech Company

  • 4
    $10,000+
    250 - 999 Employees
    Warszawa Poland

    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.

    Clients
    Bystronic
    DSI Underground
    Phoenix Contact
    DEKRA
    Industries
    Notable Project

    JCommerce worked on insurance platform development for an IT transformation company. They provided long-term web and mobile platform development services. They also built a new platform using Java architecture on the backend and JavaScript on the frontend. The client was impressed with the results of the project.

    “We went live with the system and it’s now used by the end customer of leading insurance companies, which is significant a factor of success.” – Engineering Project Lead, IT Transformation Company

  • 5
    $50,000+
    250 - 999 Employees
    Warszawa Poland

    Software Mind is a global IT services company headquartered in Krakow, Poland, with offices in Warsaw, Rzeszow, and Bielsko-Biala in Poland as well. Founded in 1999, their team of 116 works with clients from startups to enterprises to offer assistance in custom software development, enterprise app modernization, and BI & big data consulting & SI. They mainly work in the medical and financial services industries.

    Clients
    Corelogic
    Dell
    GTECH
    Raiffeisen Group
    Industries
    Notable Project

    Software Mind was tasked by a navigation software company to assist in developing their platform that is used for ocean vessels. They greatly sped up the development process of the platform, using C# and WPF, and Postgres.

    "They’re extremely flexible and easy to work with. You can have really good conversations with them, and they’re very knowledgeable about what they do. They have been great partners so far." - CTO, Navigation Software Company

  • 6
    $50,000+
    250 - 999 Employees
    Warszawa Poland

    ITMAGINATION is a technology services company in Warsaw, Poland with more than 400 employees. Established in 2008, they do customer software development, web development, and BI and big data consulting. ITMAGINATION primarily serves midmarket–enterprise clients in the financial services, business services, and utilities sectors.

    Clients
    Volvo
    T-Mobile
    Moneytrans
    Industries
    Notable Project

    ITMAGINATION served as a development partner to a corporate travel company. They mostly worked on an app’s backend but also provided frontend support and API integration services, while their DevOps resources did AWS migration and monitoring. ITMAGINATION’s involvement impacted the quality of the client’s products. 

    “They’re a big part of our team with a major impact on the quality of our products.” – Engineering Transformation Manager, Corporate Travel Company

  • 7
    $25,000+
    50 - 249 Employees
    Warszawa Poland

    Altkom Software & Consulting, founded in 1998, is a software development company headquartered in Warsaw, Poland, with an additional office in Krakow, Poland. They specialize in custom software development, web development, and application management & support. The company has 130+ employees who work with enterprise, mid-market, and small businesses. The businesses they serve are mostly in the financial services industry. 
     

    Clients
    Allianz Partners
    T-Mobile
    Citi Bank
    Industries
    Notable Project

    Altkom Software & Consulting does software management for an oil company. The client needed a user-friendly pricing tool, and Altkom Software & Consulting is building the tool with the features that fit the client's needs. The company also consistently communicates with the client. Since working with the company, the client is satisfied with the quality of their work and wants to continue the partnership. 


    “Their work is of an extremely high standard in terms of design, management, and execution.”– Pricing Manager, Oil Company
     

  • 8
    $5,000+
    50 - 249 Employees
    Warszawa Poland

    CROSS sp. z o.o. is a software development company headquartered in Warsaw, Poland, with an additional office in Opole, Poland. Founded in 1988, the 6-person team specializes in custom software development, financial accounting, and blockchain.

    Clients
    EWE
    PGNiG
    Bank Polski
    Industries
    Notable Project

    CROSS sp. z o.o. provided custom software development services for a utilities company. The client needed a new system that would help make their business run more smoothly. CROSS sp. z o.o. built the system for the client’s employees; the system allows employees to do things such as sell products and make reports. The client has stated that this system is essential to the company.

    “We can’t operate without this system.” —Director, Utilities Company

  • 9
    $5,000+
    50 - 249 Employees
    Warszawa Poland

    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.

    Clients
    LexisNexis
    Muzeum Auschwitz-Birkenau
    Mitsubishi Poland
    Nestlé Poland
    Industries
    Notable Project

    Ideo Agency partnered with a medical device company for web design and development project with ongoing support and maintenance. Additionally, the team also helps grow e-commerce shops and optimize ROI rates. Since their hire, Ideo has offered the best value compared to others in the industry.

    “One of Ideo’s best attributes is an ability to adapt their workforce to meet our company’s needs.” — Digital Marketing Specialist, Medical Device Company

  • 10
    $5,000+
    50 - 249 Employees
    Warszawa Poland

    9BITS is a software developer based in Warsaw, Poland. Established in 2009, they have more than 100 employees that cater to small–midmarket clientele. They offer custom software development, mobile app development, and e-commerce development services.

    Clients
    Adrino
    Eurocash
    Volkswagen
    Unilever
    Industries
    Notable Project

    9BITS developed iOS and Android apps for a bike-sharing company. They integrated the app with the client’s core system, existing apps, Revel Systems, VPNs, and tunnel links for connections in certain cities. The client appreciated the level of quality that 9BITS put into their work.

    “We’ve worked with 9BITS on projects in the past, and were happy with the quality of their work and ability to understand our business.” – Project Manager, Bike-Sharing Company

  • 11
    $5,000+
    10 - 49 Employees
    Warszawa Poland

    JMMJ is a custom software development company based in Warsaw, Poland. Founded in 2008, they have 22 employees specializing in mobile and web technology, including AI, augmented reality, and machine learning. Working for small businesses, midmarket companies and global enterprises, they offer blockchain solutions, mobile and web app development, and Cloud control.

    Clients
    Microsoft
    Rental Butler
    Mama Zone
    Clipatize
    Industries
    Notable Project

    JMMJ designed and developed a mobile workflow application for a financial services company. They implemented an integrated and sophisticated calculation engine, and handled modifications and new features for later releases. The app is regarded as a game changer and was expanded to all business lines due to its success.

    “JMMJ is an exceptional partner due to their ability to work expeditiously and remain adaptive. Their team is able to fill in the gaps when planning initial scopes, and always delivers on time.” – New Business Development Manager, Financial Services Company

  • 12
    Undisclosed
    10 - 49 Employees
    Warszawa Poland

    RAD4M is a mobile app development company with offices in Krakow, Poland, and London, England. Founded in 2008, they have between 10 and 49 employees who provide a range of services for developing websites, mobile apps and custom software. They focus primarily on business services for small to midmarket companies and global enterprises. 

    Clients
    Egmont
    CEZ Group
    Skanska
    Deutsche Bank
    Industries
    Notable Project

    RAD4M built an intranet solution for a power company using Microsoft SharePoint. They also helped create several project management systems for web and mobile. The client was impressed with their efficient, cost-effective deliveries. The new system provided a more fluid, dynamic way for employees to communicate with suppliers and customers.

    “They are very efficient. RAD4M understands our goals, and we have a business relationship on a high level. Their team is good for the cost and they’re more efficient than other developers.” – IT Manager, Power Company
     

  • 13
    $10,000+
    10 - 49 Employees
    Warszawa Poland

    LeanCode is a software studio founded in 2016 and based in Warsaw, Poland. With more than 10 members in their team, they specialize in custom software, web, and mobile app development services for clients in the fields of education, transportation, and consumer products.

    Clients
    Shell
    Innogy
    Maspex
    Industries
    Notable Project

    LeanCode developed a mobile app for a workplace fitness SaaS. The goal was to develop an app that was to be used by clients such as Google and Microsoft. LeanCode’s contributions to the app made it have a 4.4 rating.

    “LeanCode taught us how to build a great product effectively.” - CEO, Workplace Fitness SaaS

  • 14
    $5,000+
    10 - 49 Employees
    Warszawa Poland

    Brights is a digital production agency that's headquartered in Kyiv, Ukraine; they also have an office in Warsaw, Poland. Founded in 2011, Brights has about 43 employees that do web development, mobile app development, and UX/UI design. They serve a range of clients, notably midmarket clients and businesses in the IT, advertising, and e-commerce sectors.  

    Clients
    Masafi
    Bloomsters
    PUMP Bank
    Suzuki
    Industries
    Notable Project

    Brights developed a CRM portal that tracked employees' KPIs; they designed the UX/UI. Consequently, efficiency and statistics tracking improved. 

    "They are open to sharing ideas and discussing alternative solutions. They are also flexible in switching from one concept to another." – Manager of Business Intelligence, International Firm 

  • 15
    $50,000+
    10 - 49 Employees
    Warszawa Poland

    JMR Technologies is a software house based in Warsaw, Poland. Founded in 2009, they have approximately 16 employees who serve midmarket and small business clients across industries. Services include web development, custom software development, and mobile app development.

    Clients
    Rocket Impact
    Industries
    Notable Project

    JMR Technologies developed a mobile fitness game. They used Unity to build out the backend, then they integrated GPS tracking, and allowed users to sign up through social media accounts.

    "Our developer has managed the whole project and done a great job." Executive Sports Company

  • 16
    $5,000+
    10 - 49 Employees
    Warszawa Poland

    SoftProdukt is a software engineering company located in Denver. Founded in 1986, they currently have about 8 employees. They provide web, custom software, and IoT development services to midmarket firms and small businesses in government, financial services, and the gambling industry. 

    Clients
    Central Mining Institute
    KONAR
    Industries
    Notable Project

    SoftProdukt provided development services, coding in a Django framework with Python for a data analytics company. They managed application analytics as well as UX/UI design efforts. They offered valuable expertise and produced deliverables efficiently. 

    "Their capabilities and skills are very good." — Founder & CEO, Data Analytics Company

  • 17
    $5,000+
    50 - 249 Employees
    Warszawa Poland

    Uptime, a midsize custom software development company, is based in Tallinn, Estonia; Oslo, Norway; Warszawa, Poland and Vejle, Denmark. They focus on custom software development, IT managed services, e-commerce development, application management & support, and more and were founded in 1992.

    Industries
    Notable Project

    Uptime Development provides web development services for an Estonian consumer electronics distributor. The team has revamped the client's site, building the frontend using Vue.js and coding it with C#. 

    "They’ve become pretty good partners, and we can communicate freely with them."

  • 18
    $1,000+
    50 - 249 Employees
    Warszawa Poland

    SvitSoft is a web development company located in Kyiv, Ukraine and founded in 2010. The team of about 70 employees provides custom software, web, and mobile app development services, as well as advertising services. They serve mainly small businesses in the business services sector.

    Clients
    Billerbeck
    Industries
    Notable Project

    SvitSoft provided marketing and web development services to a real estate company. Their work also involved advertising, marketing research, and strategy. The team produced satisfactory results, and the partnership was successful.

    “My budget keeps growing and I keep giving them new directions because I’m satisfied.” – CDO, Real Estate Company

  • 19
    $5,000+
    10 - 49 Employees
    Warszawa Poland

    ImpiCode is a software development company that specializes in mobile, custom software, and web development services. Founded in 2017, they have a team of roughly 6 employees located in Warsaw, Poland.

    Clients
    Podkarpacki Bank Spółdzielczy
    Medical University of Łódź
    Institute of Literary Research
    eMKa Project
    Notable Project

    ImpiCode developed a custom backend database from scratch to centralize content for a literary research institute. They built the product to host bibliographies and compendiums in one file format. The platform increased efficiency by consolidating materials in one system.

    “...they, as a company, were available for our calls and questions at any time.” – Researcher, Literary Research Institute

  • 20
    $50,000+
    50 - 249 Employees
    Warszawa Poland

    Directpl is a midsize software development company. Located in Chicago, Illinois; Rochester, New York; Toronto, Canada and Warszawa, Poland, the firm was established in 1997. Their team focuses on custom software development, application management & support, IT managed services, and application testing.

    Industries
    Notable Project

    Directpl provided app development services to a consumer goods company. These efforts included linking CRM services to the mobile app in order to facilitate customer intel to salespersons, among other features.

    ‘‘They delivered everything on time and budget.’’

  • 21
    $1,000+
    10 - 49 Employees
    Warszawa Poland

    Founded in 2016, Grad Agency is a digital development agency that offers web design, web development, and e-commerce development services to their small business and mid-market clients. Their 10 employees are based out of Warsaw, Poland.

    Clients
    Ecolines
    Diamond Discovery
    SUP
    Industries
    Notable Project

    Grad Agency recently worked on web development for a startup company. They designed and implemented a customized WordPress site  for that client.

    “Their project management style was great. They had a clear team structure.” — CEO, Startup Company

  • 22
    $5,000+
    10 - 49 Employees
    Warszawa Poland

    IP Partner is a software development agency founded in 2009 and headquartered in Warsaw, Poland. With a team of over 10 employees, they serve medium-sized companies across a range of industries, offering IT staff augmentation, custom software development, website development, testing, and more.

    Clients
    Rydoo
    Pentacomp
    OPGK
    Industries
    Notable Project

    IP Partner helped a tourism company improve the efficiency and speed of its web-based booking transaction system. The client was satisfied with their work, obtaining a system that's not only easier to use but also produced more bookings. 

    "Our payment system and transaction system was working better." – Director of Marketing, Tourism & Leisure Company

  • 23
    $5,000+
    250 - 999 Employees
    Warsaw Poland

    SotaTek JSC is an AI and blockchain development company based in Hanoi, Vietnam, with offices in Tokyo and Osaka, and Costa Mesa, Calif. The company, founded in 2015, has more than 500 employees and provides blockchain, custom software development, mobile app development, web development, AI, e-commerce development, and IT strategy consulting services. SotaTek serves mid-market and other-sized companies in various industries that include arts & entertainment, business services, and automotive.

    Clients
    Kyber Network
    Flowchain
    ProximaX
    XinFin
    Industries
    Notable Project

    A digital marketing company hired SotaTek JSC to provide software development and IT consultancy services. Following the company's specifications, SotaTek developed a software that enabled the company's team to track marketing analytics metrics and performance in company website and various social channels, including Google, Youtube, Twitter, Linkedin, keywords trackers. This software exceeded the company's expectations.

    "A timely partner, SotaTek always worked in the fastest pace, met deadlines and encouraged direct communication with all team so that we can catch up daily. Reliable." - Digital Marketing Team Leader, Digital Marketing Company

  • 24
    $25,000+
    10 - 49 Employees
    Warszawa Poland

    Pragmasoft Sp. z o.o. is a Warsaw, Poland based web development and UX design company. Along with web development, they also specialize in artificial intelligence and IT managed services. They were founded in 2014 and have a team of 29 employees.

    Clients
    Danfoss Poland
    itslearning
    Notable Project

    A software company worked with Pragmasoft Sp. z o.o. to develop new software. In addition, they worked with the client’s in-house developers to integrate the software’s features. The client was impressed with the coding abilities of the employees at Pragmasoft Sp. z o.o.

    “I’ve worked with many companies before, and Pragmasoft is the most easy-going one. We are very well matched. They’re agile, spirited, performance-focused, and committed to delivering great results.” – CTO, Software Company

  • 25
    $10,000+
    10 - 49 Employees
    Warszawa Poland

    Appstronauts is a mobile app development company that was founded in 2015. They are headquartered in Warsaw, Poland with another location in Manchester, U.K. The company is made up of 11 employees and specializes in mobile app development, custom software development, and IT strategy consulting. Their client focus is small businesses, primarily in the business services, consumer products, and education industries.

    Clients
    Beerd
    Smartfix30
    National Creativity Center Foundation
    OTIS Elevator Company
    Industries
    Notable Project

    Appstronauts partnered with an automotive company where they created a mobile app and a web app. The website they designed featured a more efficient way for the owner to conduct business online and reach more customers. The client appreciated how easy Appstronauts was to work with.

    "I was so excited for my product; whenever a certain feature was completed, they’d automatically upload it to a server, thus making it possible for me to test it." – Owner, Automotive Company 

  • 26
    $1,000+
    50 - 249 Employees
    Warszawa Poland

    Madiff is an innovation and IT engineering consulting company based in Warsaw, Poland. The company, founded in 2015, has more than 50 employees and provides IT managed services and HR services to small and larger-sized companies and institutions in the automotive, consumer products & services, financial services, and other industries.

    Clients
    AWP Polska SP. z o.o.
    Industries
    Notable Project

    Madiff provided frontend and backend .NET programmer teams to an assistance company as SCRUM teams to help the internal team of developers enhance the company's core assistance system and web-based insurances selling portal. Madiff delivered on their tasks and met all expectations.

    "Good quality of deliverables, effective work started after 2 weeks already (first 2 weeks needed to get familiar with local specifics)." - Local CIO, Assistance Company

      

  • 27
    $25,000+
    2 - 9 Employees
    Warszawa Poland
    Crystal Apps, a mobile app development firm, was founded in 2018. The firm offers mobile app development, AR/VR development, custom software development, application management & support, and more and has a small team.
    Industries
    Notable Project

    Crystal Apps helped a parking management company develop a validation app. They built the iOS and Android solutions using React. It communicates with the parking barriers and cash machines.

    "Everything was on schedule, which was important to us."

  • 28
    Undisclosed
    2 - 9 Employees
    Warszawa Poland
    Mobile application development company InventiApps was founded in 2013. The agency specializes in mobile app development, custom software development, enterprise app modernization, and web development and has a small team. The agency is based in Warszawa, Poland.
  • 29
    $1,000+
    10 - 49 Employees
    Warszawa Poland

    Vicson Digital is a full-service digital agency founded in 2016 with a team of 11. The company is headquartered in Warsaw, Poland, with an office in Kyiv, Ukraine. They provide small and midmarket clients their custom software development, web development, and web design needs. They work with frameworks such as WordPress and Laravel, and they work in industries such as business services and consumer products.

    Clients
    Axtrion Ventures
    Acris Agro
    Atlas Corporation
    Industries
    Notable Project

    Vicson Digital provided assistance to an engineering company by developing an app that assists with engineering drawings. The app reduces the drawing process time by an hour or so.

    "Project management was good. They communicated with us without delays and always were in touch." – Project Manager/Structural Engineer, Engineering Company

  • 30
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    V2P

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    $10,000+
    10 - 49 Employees
    Warszawa Poland
    Custom software development firm V2P is located in Warszawa, Poland. They provide custom software development, mobile app development, and web development and were launched in 2009.
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Based on your budget, timeline, and specifications we can help you build a shortlist of companies that perfectly matches your project needs. Schedule a free consultation with a Manifest Analyst.

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