Top 70 C# Developers in Warsaw

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Top 70 C# Developers in Warsaw

February 2023

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. 

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

  • 1
    • $50,000+
    • 1,000 - 9,999 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
    • Backbase
    • Branch

    Industries

    Notable Project

    Software Mind has recruited technical resources for a software service provider. They've helped the firm develop two of their software systems. 

    "I'm impressed by the quality of the talent they provide."

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  • 2
    • Scheduling

      4.4
    • Quality

      4.8
    • Cost

      4.3
    • NPS

      4.8
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 250 - 999 employees
    • Warszawa, Poland

    Altoros is a software development company in Warsaw, Poland. Founded in 2001, Altoros' team of over 350 employees specializes in cloud consulting, BI & big data consulting, blockchain and artificial intelligence services. 

    Clients

    • Allstate
    • Siemens
    • Huawei
    • Toyota

    Industries

    Notable Project

    Altoros researched a complicated environment and provided several possible solutions for a data warehousing project. The agency’s goal was to optimize business intelligence and increase new sales.

    "They have performed exceptionally. I do not have any major issues with them."

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  • 3
    • Scheduling

      4.8
    • Quality

      4.8
    • Cost

      4.7
    • NPS

      4.9
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    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland

    Brainhub is a software development partner for startups, scaleups and enterprises with ambitious product development plans. Founded in 2014, Brainhub is a team of 95 experts in Node.js, ReactJS, .NET, TypeScript and React Native that helped 65+ fintech, edtech, martech, healthcare and gamedev companies scale their web and mobile app development. Recognized as one of the fastest growing companies in Europe by Financial Times, Deloitte and Forbes.

    Clients

    • National Geographic
    • Paradox Interactive
    • TC Global
    • Collegial

    Industries

    Notable Project

    Brainhub provided UX design for a recruitment marketing agency. The team conducted a strategy workshop, comprehensive system analysis, and UX audit, recommending solutions and implementing changes. 

    "They made sure that each functionality implemented had business value."

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  • 4
    • Scheduling

      4.7
    • Quality

      4.8
    • Cost

      4.5
    • NPS

      4.8
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    • $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
    • Trov

    Industries

    Notable Project

    Avenga has deployed a team of about 30 members to help a healthcare technology firm with their product development projects. They've designed, built, and tested various product features.

    "The team is easy to work with and, for the most part, keeps their schedule."

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  • 5
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.8
    • NPS

      5.0
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    • $25,000+
    • 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

    • Expedia
    • Xerox
    • Toyota
    • eBay

    Industries

    Notable Project

    Itransition developed a custom software solution to automate IPNav’s system for sorting through millions of patents. They handled development and UI/UX design, and built an analytics engine.

    “They've gone out of their way to be flexible with us, and they really take ownership of their work."

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  • 6
    • $25,000+
    • 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

    • Kabbage
    • Greenlight
    • BNP Paribas
    • L'Oréal

    Industries

    Notable Project

    ITMAGINATION was hired by a financial services company to build and maintain a custom IT solution. The system supports operations, sales, and other materials for the organization.

    "The project went smoothly, and the team was always able to translate our vision into a real, working system."

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  • 7
    • Scheduling

      4.4
    • Quality

      4.7
    • Cost

      4.4
    • NPS

      4.8
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    • $5,000+
    • 250 - 999 employees
    • Warszawa, Poland

    Scalo is a software solutions company based in Wroclay, Poland. The company, founded in 2007, has around 500 employees and provides custom software development, IT staff augmentation, web development, application testing, and IT strategy consulting services. Scalo serves mid-market and other-sized companies in various industries that include financial services, IT, and manufacturing.

    Clients

    • Change Donations
    • ELSA
    • Satori Analytics
    • ING

    Industries

    Notable Project

    Scalo has augmented a technology company's development capabilities. The vendor has provided Python developers that worked together with the client's team for projects.

    "Scalo took the time to understand our team, our values, and our ways of working."

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  • 8
    • Scheduling

      4.6
    • Quality

      4.8
    • Cost

      3.8
    • NPS

      5.0
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    • $50,000+
    • 1,000 - 9,999 employees
    • Warszawa, Poland

    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.

    Clients

    • Adidas
    • Ubisoft
    • SumUp
    • Rakuten

    Industries

    Notable Project

    Pentalog has been hired by a software company to augment their IT team. They helped transition the IT department to Agile and Scrum methodologies.

    "We were able to quickly integrate efficient developers at a reasonable cost."

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  • 9
    • $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

    • Aras Corp
    • Backbase
    • Boozt
    • Bystronic

    Industries

    Notable Project

    JCommerce is an integrated member of the client’s business, offering ongoing business intelligence and analytics solutions for the end customer.

    "JCommerce is responsive and quick in finding solutions for our customers."

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  • 10
    • $5,000+
    • 1,000 - 9,999 employees
    • Warszawa, Poland

    Innowise Group is a custom software development company based in Warsaw, Poland. With more than 1000 specialists on board and 600 projects completed, they use cutting-edge technologies to transform their client's businesses. They are experts in designing and developing tech solutions that will help your company enhance its processes and increase customer satisfaction, thanks to their 15+ years of experience and extensive expertise. They create custom software to fit your unique requirements in terms of timeline, budget, and use case. They handle every step of the development process, from product concept and development to testing, deployment, and support. In addition to building custom software, we also excel in UX/UI design, IT strategy consulting, and staff augmentation.

    Clients

    • Terraces.io
    • Voka
    • Belyagdar
    • Instatsport

    Industries

    Notable Project

    Innowise Group was hired by a SaaS company to support the continuous improvement of their legal technology software. They're tasked with developing new features, fixing bugs, and providing technical support.

    “What stands out the most is Innowise Group’s attention to detail and great range of strong technical candidates.”

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  • 11
    • $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

    • BNP Paribas
    • AXA Insurance
    • Santander
    • Danone

    Industries

    Notable Project

    Altkom Software helped an AI company with their due diligence. The team audited the company's product delivery process, development process, system architecture, security, control system, and testing approach.

    "I appreciated the communication skills and the ability to provide feedback."

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  • 12
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
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    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland

    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.

     

    Clients

    • The Bay Club Company
    • Optimal Financial Systems
    • EoS Fitness
    • Global Guardian

    Industries

    Notable Project

    Qodeca has developed a website and a custom platform for an innovation software company. The team’s work involves planning the website’s and platform’s layout, content, typography, and overall design. 

    “Qodeca’s quality of work distinguishes them from their competitors.”

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  • 13
    • $10,000+
    • 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

    • Aarsleff Ground Engineering
    • Arcelor Mittal
    • Barilla
    • Bien Air

    Industries

    Notable Project

    Ideo Agency contributes useful design and development support for an international medical site. The e-commerce platform includes versions in several languages. They modify, enhance, and maintain each page.

    “Ideo answers our requests promptly and offers a valuable service proposition for our investment.”

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  • 14
    • Scheduling

      4.3
    • Quality

      4.6
    • Cost

      4.3
    • NPS

      4.6
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    • $25,000+
    • 250 - 999 employees
    • Warszawa, Poland

    K2 Digital Products is a digital firm based in Warsaw, Poland with more than 50 employees. They have provided UX/UI design, e-commerce development, and product design solutions to clients ranging from small companies to large firms.

    Clients

    • ABB
    • Bayer
    • Carrefour
    • PKO BP

    Industries

    Notable Project

    A nonprofit organization hired Fabrity (formerly K2 Digital Products) for website development. The team was in charge of generating an online platform that served as a manual for people in the end-of-life care industry.

    "Fabrity (formerly K2 Digital Products) employees were professionals in their respective fields."

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  • 15
    • Scheduling

      4.8
    • Quality

      5.0
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 50 - 249 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

    • Credit Agricole Bank
    • Shell
    • Innogy
    • Maspex

    Industries

    Notable Project

    LeanCode developed the flagship app of a recruitment startup that specializes in the hospitality industry. The team helped with brainstorming and branding before developing both iOS and Android platforms.

    "They were willing to share their business knowledge and tips to help us avoid possible obstacles."

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  • 16
    • $10,000+
    • 50 - 249 employees
    • Warszawa, Poland

    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. 

    Industries

    Notable Project

    lightpoint handled a HubSpot to Salesforce transition, migrating data and implementing sales, process, and email automation. They also augmented reporting procedures.

    "They’re perfectly organized and self-motivated. I’m a pretty demanding client, but they exceeded my expectations." 

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  • 17
    • $10,000+
    • 250 - 999 employees
    • Warszawa, Poland

    Instinctools is a prominent software development and IT services firm based in Stuttgart, Germany with an additional office in Belarus. Founded in 2000, they have over 200 employees and provide sophisticated software engineering support, including custom software development, web and mobile development, and data-driven business intelligence.

    Clients

    • Swiss Red Cross
    • Daimler
    • Fujitsu
    • SAP

    Industries

    Notable Project

    *instinctools provides ERP customization for a tv services and media company. They help the client with Odoo ERP software integration to match and connect with BI tools for analytics and data visualization.

    "They are very responsive and effective in customizing the system, trying to engineer and offer the best fit solution."

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  • 18
    • Scheduling

      4.9
    • Quality

      4.9
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 250 - 999 employees
    • Warszawa, Poland

    Custom software development company Elinext is a global company with offices around the world in New York, NY, Ireland, Germany, Belarus, and more. The team of nearly 200 has been around since 1997 and serve a range of clients from startups to Fortune 500 companies. They provide custom software, mobile app, web, and IoT development, as well as UI/UX design.

    Clients

    • Broadcom
    • Parrot
    • Siemens
    • Trumpf

    Industries

    Notable Project

    A healthcare software development company has hired Elinext for custom software development. Elinext helps develop the client's frontend technology, test cases, and test coverage.

    “We’ve been impressed with how they participate as full team members.”

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  • 19
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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

    • Solutions30
    • OTIS
    • Decathlon
    • Agora

    Industries

    Notable Project

    Appstronauts augmented an SEO company's technical team with a suitable developer. The team helped integrate APIs into a third-party tool to create a combined panel for SEO analysis and insights. 

    "Their ability to deliver was something worth mentioning."

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  • 20
    • Scheduling

      4.8
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $10,000+
    • 10 - 49 employees
    • Warszawa, Poland

    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.

    Clients

    • Egmont
    • GoGift
    • CEZ Group
    • Skanska

    Industries

    Notable Project

    RAD4M created a digital process using business intelligence modeling to analyze financial data. They integrated this with a web portal where users can apply results to business questions.

    "They offer the best business intelligence portal."

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  • 21
    • Scheduling

      4.5
    • Quality

      4.7
    • Cost

      4.2
    • NPS

      4.9
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 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.

    Industries

    Notable Project

    The client partnered with JMR Technologies to produce an app. The agency provided design and development services.

    "I have to say JMR Technologies was very patient with me. Being a person who doesn't know anything about programming, they had to explain things to me. It was really a cooperation."

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  • 22
    • Scheduling

      5.0
    • Quality

      4.9
    • Cost

      4.9
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland

    Existek is a full-cycle software development and outsourcing firm based in Vinnitsa, Ukraine. They were established in 2012, and have 13 employees. Existek's services include web development, custom software development, IT staff augmentation, and more.

    Clients

    • Lingit AS
    • IntelliChief
    • Spellex
    • Engage Works

    Industries

    Notable Project

    Existek augmented internal development resources to develop a QR code processing solution. The web-based solution was built in .NET and enables loyalty card production, scanning, and tracking. 

    "Existek was very easy to work with, very professional, just amazing in every way."

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  • 23
    • $10,000+
    • 50 - 249 employees
    • Warszawa, Poland

    Team Connect Ltd. Is a software development firm in Warszawa, Poland and Gliwice, Poland. Established in 2008, the midsize team specializes in custom software development, IT staff augmentation, IT managed services, enterprise app modernization, and more.

    Clients

    • Santander
    • Orange
    • Samsung
    • Medicover

    Industries

    Notable Project

    Team Connect Ltd. implemented a Salesforce custom solution for an IT company, including enhancing complex processes. The main goal of the project was to improve the firm's sales and recruitment process.

    "Their team was very knowledgeable, and they knew exactly what we needed because they were similar to us."

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  • 24
    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland

    EC2 S.A. is a IT services company founded in 2006 in Warsaw, Poland. Their team of around 20 employees provides custom software development services to mostly mid-market businesses in the IT sector. 

    Industries

    Notable Project

    SEDIVIO S.A. is supporting an IT services company’s development team. They provide .NET developers to the client. 

    "Everything is perfect."

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  • 25
    • Scheduling

      4.9
    • Quality

      5.0
    • Cost

      4.7
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland
    Headquartered in Lakewood, Colorado; Vilnius, Lithuania; Kyiv, Ukraine and Warszawa, Poland, Akveo is a custom software development firm. The agency focuses on custom software development, web development, cloud consulting & SI, and mobile app development and is midsize.The agency was launched in 2015.

    Clients

    • MyСompassPoint
    • OpenMatics
    • Mitel Networks Corp
    • Conda AG

    Industries

    Notable Project

    Akveo is developing a web app with an Ionic framework. Wireframes and UI designs inform their work, which is supported by a Firebase backend. After delivering a prototype, they began to build out the solution.

    "Akveo is always suggesting innovative solutions and remains open and accessible." 

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  • 26
    • $10,000+
    • 10 - 49 employees
    • Warszawa, Poland

    Founded in 2016, MITRIX Technology is located in Belarus, Minsk. Their team of 21 employees provides web development, custom software development, and IT staff augmentation services to small businesses.

    Industries

    Notable Project

    A health care technology company engages MITRIX Technology for frontend and backend software development services. MITRIX Technology developed a workflow that involves ordering products to billing customers.

    "MITRIX operates like a fast-paced local firm."

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  • 27
    • Scheduling

      4.3
    • Quality

      4.7
    • Cost

      4.8
    • NPS

      4.8
    Read Full Reviews on Clutch Visit Site
    • $1,000+
    • 10 - 49 employees
    • Warszawa, Poland

    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.

    Clients

    • Cd Projekt Red
    • 1C Game Studios
    • White Wizard Games
    • Blayze Games

    Industries

    Notable Project

    StoryMode provides remote Unity development resources for a mobile game company.

    "Their willingness to be flexible on hours stands out to me. Their price is also good."

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  • 28
    • Scheduling

      5.0
    • Quality

      4.8
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $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

    • Unilever
    • Volkswagen
    • Sanofi
    • Leroy Merlin

    Industries

    Notable Project

    9BITS built a web-based CRM application for a management consulting firm. They used Java. The team continues to provide ongoing customizations and improvements.

    "They’re an experienced team with strong technical skills."

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  • 29
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • $25,000+
    • 50 - 249 employees
    • Warszawa, Poland
    Product design company Intechhouse was founded in 2003. The agency provides product design, custom software development, IT staff augmentation, IoT development, and more and has a midsize team.

    Industries

    Notable Project

    An airport and aviation technology solutions provider partnered with TechHouse to scale up their international development team with advanced hardware and software talents.

    "I can mention their valuable experience from different fields and industries and attention to detail."

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  • 30
    • Scheduling

      5.0
    • Quality

      5.0
    • Cost

      5.0
    • NPS

      5.0
    Read Full Reviews on Clutch Visit Site
    • Undisclosed
    • 2 - 9 employees
    • Warszawa, Poland
    FlyHigh.PRO is a small web development company based in Warszawa, Poland. They specialize in web development, custom software development, and web design and were founded in 2010.

    Clients

    • EcoVadis SAS
    • Tailors Group Sp. z o. o.
    • Agencja Employer Branding
    • Fundacja Stocznia

    Industries

    Notable Project

    FlyHigh.PRO collaborated with a branding strategy agency to develop a clickable CMS version of multimedia materials. Their expertise in web development and design guided the project from concept to completion.

    "We are in constant contact. Whenever there is a need to change in a specific area, we talk openly about our needs."

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