Looking for a top C# programmer?

C Sharp, or C#, is a programming language created by Microsoft. It's general-purpose and addresses static typing, object- and component-oriented programming approaches. It uses the .NET framework and is best for developing web apps, desktop apps, mobile apps, and games.

That's why we've created this list of the best C# developers for you to review. Read through company descriptions, former clients, and notable projects to find the best fit for your business. (And, if you want personalized recommendations, tell us about your project.)

List of the Best C# Programmers

  • 1
    $25,000+
    250 - 999 Employees
    Gliwice Poland

    Future Processing is a software developer based in Gliwice, Poland. Founded in 2000, they now have more than 900 employees. They specialize in custom software development, web development, and enterprise app modernization for primarily midmarket and small business companies in the healthcare, IT, and transportation industries.

    Clients
    Allocate
    Demica
    4 finance
    Coconet
    Industries
    Notable Project

    Future Processing developed a scalable, bespoke solution for managing surplus food warehouses which helped to decrease product input time on key processes by up to 33% when compared to the old system.

    “Each and every project has been a success.” – Founder, Business Services Firm

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  • 2
    $50,000+
    1,000 - 9,999 Employees
    Kyiv Ukraine

    Sigma Software is a software development partner with 1300+ employees. Founded in 2002, the company is headquartered in Ukraine and has offices in the U.S., Canada, the U.K., Israel, Sweden, and Poland. They help clients from startups to Fortune 500 brands with software product and custom solutions development. Their expertise spans across web and app development, digital transformation, Big Data, AI/ML, AR/VR, and IoT.

    Clients
    Volvo
    Scania AB
    KnorrBremse
    AstraZeneca
    Industries
    Notable Project

    Sigma Software developed and launched an advertising platform for an advertising technology firm. The firm had a general idea for the platform, but needed the technical skills to launch it. Sigma Software provided interface design and coding, using a team of 8-12 developers. The launched ad platform began successfully generating revenue within 6 months and received positive feedback.

    "We consider Sigma Software to be a strategic partner and an integral part of what we're doing at this time." – Founder & CEO, Ad Tech Firm

  • 3
    $50,000+
    250 - 999 Employees
    Washington DC

    Based in Vienna, VA, 10Pearls designs and maintains apps for various companies. The company and its nearly 350 employees have experience in cybersecurity, product development, and UX/UI design.

    Clients
    HughesNet
    Johnson & Johnson
    PayPal
    CocaCola
    Industries
    Notable Project

    A telemedicine company needed assistance with platform development and maintenance. 10Pearls helped the telemedicine company with all aspects of platform development, creating a website and mobile app and ensuring the website’s backend was admin-friendly.

    “They [10Pearls] get the job done, work hard, and are very responsive. I’ve never had to question if I should replace them.” – CTO, Telemedicine Company

  • 4
    $25,000+
    250 - 999 Employees
    Pleasanton CA

    Altoros is a software development company in Minsk, Belarus. 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 worked on blockchain development for an insurance platform. Altoros developed multiple software projects for the client including a monitoring interface and a custom front end. Altoros also connected the client to Smart Contract and built a cloud-based monitoring network on the software. 

    "They [Altoros] have very high-class project management. All team members are skilled from a technical, organizational, and logistical standpoint. They perform very well." - CEO, Insurance Platform 

  • 5
    $25,000+
    50 - 249 Employees
    Longmont CO

    Paralect is a software development house founded in 2009. They're based in Longmont, Colorado, but they have an additional office in Minsk, Belarus. Their 100-person team serves clients in the finance, education, and health sectors. They specialize in custom software development. 

    Clients
    Robomongo
    goLance
    SmartAlto
    Notable Project

    Paralect continues to develop a React-based platform for a copywriting SaaS startup. They were initially given a test project and later retained to be a permanent development partner. The solution they delivered has acquired increasing amounts of traffic.

    "I was impressed with their ability to write code that could handle large amounts of traffic." — Co-Founder, Copywriting Feedback Platform

  • 6
    $50,000+
    1,000 - 9,999 Employees
    L'viv Ukraine

    Founded in 1991, ELEKS is a provider of custom software development, product design, QA, and technology consultancy services. They offer cooperation models that fit the goals, resources and timelines of Fortune 500 companies, large enterprises, and small businesses. Headquartered in Ukraine, ELEKS has more than 1,600 specialists and 11 offices on three continents to serve their clients globally. 

    Clients
    Aramex
    Autodesk
    ESET
    TAIT
    Industries
    Notable Project

    ELEKS developed a new, easy-to-operate front-end system for an industrial manufacturing company's equipment load management (EML) data. They implemented different file handling requirements and designed the interface with 3D object graphical presentation and graphical data handling elements. 

    “The broad scope of work they handled impressed me the most. They also quickly understood the different requirements we had, which came from completely different fields.” -  Principal, Industrial Manufacturing Company

  • 7
    $10,000+
    250 - 999 Employees
    Ahmedabad India

    Founded in 2001, TatvaSoft is a custom software development company, spanning its presence across various global locations like the US, Canada, the UK, Australia, and India. Our team of 800+ IT professionals offers business growth with their knack for technology platforms.

    Clients
    Anglo American
    De Beers
    NSW Health
    Fiji Airways
    Industries
    Notable Project

    TatvaSoft catered their skills and work to meet the software development needs of developing an equipment monitoring platform for a mining-based client. They developed a solution as a solution to global business problems, resolving them to offer higher productivity and newer revenue streams to the client.

    "Over 10 years of engagement with TatvaSoft for custom software development, our business has seen profitable results with their proven skills. We are grateful to have engaged with proficient developers and teams that offer a top-notch and cost-effective solution." - Technical Specialist, Mining Company

  • 8
    $25,000+
    50 - 249 Employees
    New York NY

    DOOR3 is a software development company headquartered in New York, NY. Founded in 2002, DOOR3 has grown to a team of about 60 employees that serves mostly enterprise and mid-market business. They provide software, web, and mobile app development, UX/UI design, and enterprise app modernization.

    Clients
    AIG
    Everest
    HP
    Freedom Mortgage
    Industries
    Notable Project

    DOOR3 partnered with a medical device company to help in the planning phase of redesigning three websites. DOOR3 was involved with the research and discovery phase, helping the client identify the information needed on each site, content infrastructure, and navigation. All three websites were created on Drupal but DOOR3 was not involved in that phase of the project.

    “We selected them because we felt, during the presentation, that they had a really strong user experience approach, and I think the output that we had on the site definitely validated that.” – Former Digital Marketing Manager, Medical Device Company

  • 9
    $10,000+
    250 - 999 Employees
    Wrocław Poland

    Founded in 2005, PGS Software is an IT solutions company based in Wroclaw, Poland. They provide development and consulting services to businesses of all sizes from a variety of industries. 

    Clients
    Yell
    Schmitz-Cargobull
    Coople
    Interflon
    Industries
    Notable Project

    PGS Software provided development support to a European airline carrier. They customized the company's website and internal application. Their work resulted in an increased conversion rate. 

    "The new site is working great." – IT Director, Airline Carrier

  • 10
    $50,000+
    250 - 999 Employees
    Naples FL

    Intetics Inc. is a technology company headquartered in Naples, FL, with offices in Minsk, Belarus, Wilmette, Ill., Krakow, Poland and Kharkiv, Ukraine. Founded in 1995, Intetics' team of 474 employees provides small, midmarket, and enterprise businesses with a variety of different services such as custom software development, mobile app development, and application management & support, among others.

    Clients
    Encyclopaedia Britannica
    SugarCRM
    Snap-On
    Würth
    Industries
    Notable Project

    Intetics worked with this publishing company to assist with content acquisition and development, while also building custom software solutions for the client's content. Before Intetics' help, the client's editorial update would follow a two-year cycle, which now only takes around 6-8 months, and it does so at a lower cost.

    "Intetics' role is a critical part of our workflow. They’ve proven to be agile, highly collaborative, and very responsive." – Product Manager, Publishing Company

  • 11
    $75,000+
    250 - 999 Employees
    Medellín Colombia

    Perficient Latin America (formerly PSL) is a software engineering company that was founded in 1986. With locations in New York; Medellín, Colombia; and Mexico City, Perficient Latin America has more than 650 employees. They specialize in custom software development, big data consulting, cloud consulting, system integration, and web development. Perficient Latin America supports mid-sized and enterprise clients across a range of industries.

    Clients
    Fortune 500/Large: IPG
    Deloitte
    Flex
    MuleSoft
    Industries
    Notable Project

    Perficient Latin America built a marketing web application for a sales software firm. The client valued Perficient Latin America's ability to program flawless, bug-free code thanks to their high level of expertise in development. To support the client and maintain quality assurance, Perficient Latin America continues to provide ongoing maintenance and support.

    "The developers are very careful to deliver a quality product from the start. The QA engineers don’t let errors slip through. It’s been a good, high-quality experience so far." – Vice President of Development, Sales and Marketing Software Firm  

  • 12
    $50,000+
    250 - 999 Employees
    McLean VA

    Founded in 2000, AgileEngine is a software development firm based in McLean, Va with offices in Kiev, Washington, DC, and Beunos Aires. They have more than 200 employees and offer custom software development, app development, and UX/UI design for midmarket clients. 

    Industries
    Notable Project

    A crowdfunded IoT and software startup hired AgileEngine to augment its development staff and write back-end code for a device they had built. AgileEngine built the framework for the device and the accompanying application and developed front-end mobile app that connects to the device. The startup credits AgileEngine's development team with their ability to meet internal goals and deliver a product in a timely manner.

    "I’ve worked with remote teams in the past. AgileEngine stands out for the quality of their talent. They have a phenomenal process for ensuring they onboard the best of the best, which they succeed in doing." – CEO, IoT and Software Startup

  • 13
    $50,000+
    1,000 - 9,999 Employees
    Kyiv Ukraine

    Infopulse is a digital software company based in Kyiv, Ukraine with additional offices in Israel, Germany, France, and the U.S. Since 1991, their team of more than 1,000 employees offers custom software development, web development, IT strategy consulting, mobile development and app testing services. They usually work with mid-sized clients in the information technology industry.

    Clients
    Agillic
    BICS
    Bosch
    British American Tobacco
    Industries
    Notable Project

    Infopulse designed and developed a mobile application for an Olympic committee within a tight timeline. The app included functionalities that allowed video content sharing and scheduling information.

    “Their openness, professionalism, attentiveness, and responsibility are what’s most impressive about them.” – Marketing Manager, Olympics Committee

  • 14
    $10,000+
    1,000 - 9,999 Employees
    Denver CO

    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 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

  • 16
    $10,000+
    250 - 999 Employees
    Minsk Belarus

    Belitsoft is a software development company that serves a range of businesses in the IT, education, and business services sectors. They were founded in 2004 and have about 140 employees that do web development, web design, and custom software development. They are located in Minsk, Belarus. 

    Clients
    Technicolor SA
    ElearningForce
    Insly
    IDT Corporation
    Industries
    Notable Project

    Belitsoft supplemented development resources to enhance software and meet increased market demand. They received positive feedback from stakeholders. 

    "[Belitsoft] really helped us improve and streamline the development cycle." – Principal & Co-Founder, IT Security Firm 

  • 17
    $50,000+
    250 - 999 Employees
    London United Kingdom

    DCSL GuideSmiths is a bespoke software development company headquartered in Farnborough, England with additional engineering centers in London, Manchester, England, and Madrid, Spain. Across international locations, they have a team of more than 250 individuals providing custom software, mobile application, and web development services to a diverse clientele. They support established businesses, nonprofits, government organizations, and startups

    Clients
    Mitsubishi
    Hospify
    Skanska
    Water Aid
    Notable Project

    DCSL GuideSmiths redeveloped the recruitment software system of a construction firm. After laying out their requirements, DCSL GuideSmiths designed, tested, and delivered on the system. The client was pleased with the project and felt that DCSL GuideSmiths' skills made the collaboration extremely easy. 

    "We were able to see straightaway how the system would look and work. That’s another reason it went so smoothly." – Manager, Support Department, Construction Firm

  • 18
    $100,000+
    1,000 - 9,999 Employees
    L'viv Ukraine

    Intellias is a software development services provider headquartered in Ukraine with delivery offices in Germany, Poland, and Saudi Arabia. Founded in 2002, they have 1,600+ employees today and supply Fortune 500 corporations and tech innovators across the globe with solutions in the automotive, financial, agriculture, transportation, telecommunications, edtech, healthcare, and retail domains. The services include custom software development, Big Data, AI/ML, IoT, and cloud solutions.

    Clients
    HERE Technologies
    Siemens
    Deloitte
    LG Electronics
    Industries
    Notable Project

    Intellias is developing a location data platform for a global leader in location-based services. The platform is powered by real-time HD maps, and the engineers are responsible for the cloud-based architecture and robotaxi technology that aims to enable self-driving cars in the future.

    The partnership resulted in increased efficiency and a 40% reduction in costs, while allowing in-house staff to focus on strategic projects. Intellias impressed with their solid talent acquisition process and quality standards. The agency's proactive management kept projects moving forward." - Manager, Location Platform Company

  • 19
    $10,000+
    250 - 999 Employees
    Kyiv Ukraine

    Polytech Software is an IT outsourcing company with about 150 team members in Kyiv, Ukraine, and the United States. Their services include IT managed services, application testing, and CRM Consulting. Founded in 2006, they work primarily with small and midmarket businesses in e-commerce, education, and IT industries.

    Clients
    Kyocera
    The Welkin Suite
    Wonga
    Dell
    Industries
    Notable Project

    Polytech Software has been a financial software company’s go-to development partner since mid-2018. Since then, they’ve used Delphi to update, improve, and fix bugs for the client’s products. They’ve received significant praise from internal stakeholders, for the quality of their work.

    “They have a lot of expertise in different areas so they have an extensive knowledge base.” – Manager, Financial Software Company

  • 20
    $25,000+
    250 - 999 Employees
    Corte Madera CA

    Svitla Systems is a software development company from Corte Madera, Calif. with offices in Ukraine and Guadalajara, Mexico. It was founded in 2003 and has grown to 319 employees who work on web development, custom software development, web design, mobile app development, and UX/UI design for companies of all sizes.

    Clients
    Inflection
    Cordial
    Statline
    Amplience
    Industries
    Notable Project

    An academic publishing company needed extra developers to execute the conceptual design they had already created. Svitla Systems customized their existing e-commerce site on Magento and SugarCRM, mainly through optimizing the code and configuring the back end. 

    "They chat with our internal developers on every task. They’ve really become an integral part of the team... It’s nice to treat them as members of our team. They deliver some high quality work." — VP of Technology, Academic Publishing Company

  • 21
    $10,000+
    50 - 249 Employees
    New York NY

    BrightStarr was founded in 2006 and is a custom software development company. Headquartered in Seattle, WA with additional offices in the UK and New York, the team of 126 also offers web and mobile app development and productivity consulting to help clients streamline their internal business processes.

    Clients
    Abt Associates
    Adidas
    ARCADIS
    Barclay's
    Industries
    Notable Project

    A professional sports league’s communications team hired BrightStarr to build a SharePoint system to share documents, data, analytics, and resources and communicate more effectively across teams. At the time of the interview, the platform was not live, but the client said the partnership has been positive so far.

    “Overall, the engagement has been really positive. One of the reasons that I decided to go with BrightStarr is that they aren't just going to deliver what was requested. BrightStarr is going to challenge us to do some new and innovative things and think outside the box.” – Strategic Planning Analyst, Professional Sports League

  • 22
    $50,000+
    1,000 - 9,999 Employees
    L'viv Ukraine

    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 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

  • 23
    $25,000+
    250 - 999 Employees
    Lexington MA

    SimbirSoft is a 250+ web, mobile, and custom software development firm based in Lexington, MA, with an office in Ulyanovsk, Russia. Founded in 2001, their full-service team delivers the full suite of digital tools needed for business growth.

    Clients
    SimbirSoft implements of large-scale IT projects for many industries. We are experts in the financial and IT industries of the oil industry
    health and education. SimbirSoft client list includes such companies as Kimberly-Clark Corp
    Gehtsoft LLC
    Matsushita Corp
    Industries
    Notable Project

    Over a five-year span, SimbirSoft developed numerous web and mobile apps for brands in the client’s portfolio. The end-product enjoyed positive reviews and helped the client meet revenue goals, while the team’s service-oriented attitude and flexibility were also appreciated.

    “It is always pleasant to deal with the SimbirSoft team. A devoted manager who is always in touch with us also creates this sense of comfort. Their speed of delivery and the quality of their work is excellent.” – Project Manager, Russian Publishing Company

  • 24
    $25,000+
    250 - 999 Employees
    Wrocław Poland

    CSHARK is a software and product development company that helps enterprises with digital transformation and start-ups translate ideas into products. Founded in 2014, it currently has over 300 mid and senior developers on board. CSHARK creates web and mobile apps from scratch and consults companies from FinTech and RegTech sectors. According to the Financial Times ranking in 2019 and 2020, we were among the fastest-growing companies in Europe.

    Clients
    Fenergo (Fintech)
    REGENHU (Biotech)
    VecCtor (Digital infrastructure for Industry 4.0)
    HTP J-1 Visa Programs
    Industries
    Notable Project

    CSHARK is developing custom software for a research company from Switzerland. Working in C# and .NET, the team is implementing a wide range of solutions such as graphical interface, SQL database, algorithmic generation, or modeling engine.

    "The code quality increased drastically by reaching an 80% code coverage in just a few months of work, while the amount of feature implemented more than doubled since the arrival of the CSHARK development team.” - Software Architect, Research Company.

  • 25
    $5,000+
    50 - 249 Employees
    Chicago IL

    Liventus is an e-commerce company based in Northbrook, Ill., with additional locations in Chicago and Bengaluru, India. Founded in 2002, this company has a team of more than 50 employees. Services provided by Liventus include e-commerce development, custom software development, and IT strategy consulting for businesses of all sizes.

    Clients
    Now Health Group
    Beacon Funding
    daVinci payments
    Fairfax Egg Bank
    Industries
    Notable Project

    Liventus provides ongoing web and software development services for a creative agency. They built a complex backend system that helped to increase the client's conversion rate, as well as taking on a range of other development tasks to improve the client's online standing.

    "The results of their build were dramatic—the system increased the client’s conversion rate from <1% to over 40%." - Director of Digital Services, Creative Agency

  • 26
    $25,000+
    50 - 249 Employees
    Clearwater FL

    KitRUM is a software engineering company that was founded in 2014. The company is headquartered in Clearwater, Fla., with secondary locations in Krakow, Poland and Kharkov, Ukraine. They are made up of 49 employees. They specialize in AR/VR development, IoT development, and mobile app development. 

    Clients
    Brands choose us because of our distributed nearshore engineering teams who rock in designing pixel-perfect UI
    architecture
    scalable web systems and mobile apps development with thousands of downloads. Our clients are a mix of Fortune enterprises
    newly born VC-backed startups
    Industries
    Notable Project

    KitRUM helped a video production company design an iOS app and bring it to the App Store. They ensured the app ran smoothly and fixed any bugs before launch. The client praised their project management and communication.

    "We had weekly check-ins, and they showed a demo every week of the work they’d accomplished. They provided progress reports to keep us updated on where they were at." – CTO, Video Production Company

  • 27
    $10,000+
    250 - 999 Employees
    Katowice 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 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

  • 28
    $5,000+
    250 - 999 Employees
    Gdańsk Poland

    Solwit SA is a custom software development firm based in Gdańsk, Poland. Founded in 201, their team of 500 serves clients in the IT, Financial services and utilities sectors. Services include NodeJS, AngularJS, and .NET development.

    Industries
    Notable Project

    Solwit SA developed a learning management tool and an authoring tool for an e-publishing company. Their tool received high acclaim from their client and received positive publicity.

    “The authoring tool that we use, and that was developed by Solwit, has been included in the Top 20 Authoring Tools list, held by Training Industry, for three consecutive years.” – International Marketing Manager, E-Publishing Company

  • 29
    Undisclosed
    250 - 999 Employees
    New York NY

    Abto Software, founded in 2007, is a custom software engineering company headquartered in New York City, with an additional office in Lviv, Ukraine. The company’s team of 208 people specialize in AI, enterprise app modernization, and web development. Their clients are mid-market, small, and enterprise businesses. Most of the businesses they work with are in the IT, health care & medical, and retail industries. 

    Clients
    Medikit
    UPGREAT
    Skybow
    WeGo VISION LTD
    Industries
    Notable Project

    Abto Software did computer vision tech development for a logistics solutions company. The client needed a company that could do computer vision and optical character recognition (OCR). Abto Software built an Android app with the technologies the client needed using Git and Python. The client was satisfied with the product and the price, and they look forward to working with the company again. 

    “The product works great. We’ll definitely be working with Abto Software again in the future.” — Director of Product Management, Logistics Solutions Company
     

  • 30
    $25,000+
    250 - 999 Employees
    Coventry United Kingdom

    Objectivity Ltd. is an IT company headquartered in Coventry, United Kingdom, that provides custom software and web development, as well as web design functions. Founded in 1991, the company has over 600 employees. The businesses they serve represent multiple industries including the business services, financial services, and real estate industries.
     

    Clients
    Edrington
    Suez UK
    ImmobilienScout24
    NHS
    Industries
    Notable Project

    Objectivity Ltd. provided staff augmentation services for a retail solutions company. The client needed Objectivity Ltd. to augment their development team. The team was working on headless commerce solutions, and the company provided teams to help the client with development, business analysis, and test functions. The company’s services have helped the client work more efficiently. 

    “We've seen a positive impact, and they increase our capabilities and capacity to deliver. They bring in a high level of technical expertise.” – Head of Software Development, Software Company 
     

Tell us about your project
NEED HELP SELECTING A COMPANY?

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.

TELL US ABOUT YOUR PROJECT