The Best C Sharp (C#) Software Development Companies in Warsaw

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.

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

  • 1

    Euvic

    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. 

    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 

    Former clients
    Arbor Seed Consulting
    Energa
    LexisNexis
    Geant
    Polska
    Sygnity
    Bonair
    $ $ $ $ $
    equalizer $5,000+
    group1,000 - 9,999 Employees
    place Warszawa, Poland
    4.8
    4.8
    13 Clutch reviews
    Awards

    Neilsen Norman Group: Best Intranet Award

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  • 2

    Avenga

    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.

    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

    Former clients
    Roche
    GSK
    Credit Suisse
    QPharma
    Postbank
    ABB
    Allianz
    SwissLife
    Mazda
    Volvo
    $ $ $ $ $
    equalizer $50,000+
    group1,000 - 9,999 Employees
    place Warsaw, Poland
    4.8
    4.8
    28 Clutch reviews
    Awards

    Salesforce Registered Consulting Partner , Software Magazine: Best Software Company in the Software 500 List , The Cloud Awards: Finalist (2017-2018), Microsoft Gold Partner , Inc. 5000 (2018)

  • 3

    JCommerce

    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.

    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

    Former clients
    Bystronic
    DSI Underground
    Phoenix Contact
    DEKRA
    $ $ $ $ $
    equalizer $10,000+
    group250 - 999 Employees
    place Warsaw, Poland
    4.8
    4.8
    25 Clutch reviews
    Awards

    Polish Investment and Trade Agency: Best Investment in 2017

  • 4

    Software Mind

    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.

    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

    Former clients
    Corelogic
    Dell
    GTECH
    Raiffeisen Group
    $ $ $ $ $
    equalizer $50,000+
    group250 - 999 Employees
    place Warsaw, Poland
    4.9
    4.9
    12 Clutch reviews
  • 5

    ITMAGINATION

    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.

    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

    Former clients
    Volvo
    T-Mobile
    Moneytrans
    $ $ $ $ $
    equalizer $50,000+
    group250 - 999 Employees
    place Warsaw, Poland
    4.6
    4.6
    5 Clutch reviews
    Awards

    Deloitte Technology Fast50 Central Europe , Forbes Diamond , The Gazela Biznesu (Business Gazelle) Award , Computerworld Top 200

  • 6

    CROSS

    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.

    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

    Former clients
    EWE
    PGNiG
    Bank Polski
    $ $ $ $ $
    equalizer $5,000+
    group50 - 249 Employees
    place Warsaw, Poland
    5.0
    5.0
    2 Clutch reviews
  • 7

    Altkom Software & Consulting

    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. 
     

    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
     

    Former clients
    Allianz Partners
    T-Mobile
    Citi Bank
    $ $ $ $ $
    equalizer $25,000+
    group50 - 249 Employees
    place Warsaw, Poland
    4.6
    4.6
    11 Clutch reviews
  • 8

    SoftwareHut

    SoftwareHut is a software development house with offices around the world, including London, New York, Paris, Munich, Dublin, Stockholm, Copenhagen and Zurich. Founded in 2015, they also have seven offices in Poland, including Bialystock, Olsztyn, Przemysl, Szczecin, Warsaw, Wroclaw, and Poznan. They employ 173 staff specializing in designing, customizing and developing professional IT systems, LIMS, SCM, and mobile apps.

    Notable Project

    SoftwareHut developed new code for a set of integrated laboratory sample management products for an IT and services company. They worked primarily in C#, refreshing legacy code to allow for an entire software system upgrade. The code delivered by SoftwareHut contributed to increased sales after the general product update and satisfied project stakeholders.

    “Their team was well organized and disciplined, delivering exactly what was requested within the timeline and price point that they promised. The work they did for us was a key part of an upgrade on one of our products that has led directly to more sales on our resource manager.” – Managing Director, IT and Services Company

    Former clients
    Skyscanner
    SafeLaw
    Datavisual
    $ $ $ $ $
    equalizer $5,000+
    group250 - 999 Employees
    place Warsaw, Poland
    4.8
    4.8
    21 Clutch reviews
  • 9

    Leaware

    Leaware is a development and IT consulting company that was founded in 2010 and is based in Warsaw. They primarily work with midmarket and small businesses in the consumer products & services industry. 

    Notable Project

    Leaware provided ongoing software development services to a healthcare SaaS company. The client was happy with Leaware's work and the flexibility of the team. 

    "We were very pleased with the quality of work that they delivered." – Co-Founder, Healthcare Company

    Former clients
    BNP Paribas
    The YMCA
    BeautyBox
    AXA
    COWI
    $ $ $ $ $
    equalizer $1,000+
    group10 - 49 Employees
    place Warsaw, Poland
    4.6
    4.6
    9 Clutch reviews
  • 10

    9BITS

    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.

    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

    Former clients
    Adrino
    Eurocash
    Volkswagen
    Unilever
    $ $ $ $ $
    equalizer $5,000+
    group50 - 249 Employees
    place Warsaw, Poland
    4.8
    4.8
    3 Clutch reviews
  • 11

    LeanCode

    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.

    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

    Former clients
    Shell
    Innogy
    Maspex
    $ $ $ $ $
    equalizer $10,000+
    group10 - 49 Employees
    place Warszawa, Poland
    5.0
    5.0
    8 Clutch reviews
  • 12

    JMMJ

    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.

    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

    Former clients
    Microsoft
    Rental Butler
    Mama Zone
    Clipatize
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place Warsaw, Poland
    4.9
    4.9
    4 Clutch reviews
  • 13

    Brights

    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.  

    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 

    Former clients
    Masafi
    Bloomsters
    PUMP Bank
    Suzuki
    MasterCard
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place Warsaw, Poland
    5.0
    5.0
    15 Clutch reviews
  • 14

    Ideo Agency

    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.

    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

    Former clients
    LexisNexis
    Muzeum Auschwitz-Birkenau
    Mitsubishi Poland
    Nestlé Poland
    $ $ $ $ $
    equalizer $5,000+
    group50 - 249 Employees
    place Warszawa, Poland
    4.8
    4.8
    8 Clutch reviews
    Awards

    2017 CCS Design Awards Nominee

  • 15

    JMR Technologies

    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.

    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

    Former clients
    Rocket Impact
    $ $ $ $ $
    equalizer $25,000+
    group10 - 49 Employees
    place Warsaw, Poland
    4.7
    4.7
    10 Clutch reviews
  • 16

    SoftProdukt

    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. 

    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

    Former clients
    Central Mining Institute
    KONAR
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place Warszawa, Poland
    5.0
    5.0
    2 Clutch reviews
  • 17

    ImpiCode

    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.

    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

    Former clients
    Podkarpacki Bank Spółdzielczy
    Medical University of Łódź
    Institute of Literary Research
    eMKa Project
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place Warsaw, Poland
    4.9
    4.9
    7 Clutch reviews
  • 18

    IP Partner

    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.

    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

    Former clients
    Rydoo
    Pentacomp
    OPGK
    $ $ $ $ $
    equalizer $5,000+
    group10 - 49 Employees
    place Warsaw, Poland
    5.0
    5.0
    6 Clutch reviews
  • 19

    Grad Agency

    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.

    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

    Former clients
    Ecolines
    Diamond Discovery
    SUP
    $ $ $ $ $
    equalizer $1,000+
    group2 - 9 Employees
    place Warsaw, Poland
    5.0
    5.0
    17 Clutch reviews
  • 20

    Appstronauts

    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.

    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 

    Former clients
    Beerd
    Smartfix30
    National Creativity Center Foundation
    OTIS Elevator Company
    $ $ $ $ $
    equalizer $10,000+
    group10 - 49 Employees
    place Warsaw, Poland
    5.0
    5.0
    15 Clutch reviews
  • 21

    Pragmasoft Sp. z o.o.

    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.

    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

    Former clients
    Danfoss Poland
    itslearning
    $ $ $ $ $
    equalizer $25,000+
    group10 - 49 Employees
    place Warsaw, Poland
    4.8
    4.8
    2 Clutch reviews
  • 22

    Madiff

    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.

    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

      

    Former clients
    AWP Polska SP. z o.o.
    $ $ $ $ $
    equalizer $1,000+
    group50 - 249 Employees
    place Warsaw, Poland
    5.0
    5.0
    1 Clutch review
  • 23

    Vicson Digital

    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.

    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

    Former clients
    Axtrion Ventures
    Acris Agro
    Atlas Corporation
    $ $ $ $ $
    equalizer $1,000+
    group10 - 49 Employees
    place Warszawa, Poland
    5.0
    5.0
    1 Clutch review
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