Top 60 C# Developers in New York City
October 2023Looking for a top C Sharp software development company in New York City?
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 New York City. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best New York City C Sharp (C#) Software Development Companies
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1
- $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
- Achievement Network
- AIG
- Alvin Ailey American Dance Theater
- American Museum of Natural History
Industries
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A software company hired DOOR3 to create a unified look and feel for their products with UI/UX design. After research, DOOR3 gave suggestions for design elements like color schemes, systems, and fonts.
“They had a great team, and we have nothing but praise for them.”
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2
- $25,000+
- 250 - 999 employees
- New York, NY
TekRevol is an app development startup of 18 employees. Founded in 2014, their headquarters is in Newark, Calif. They offer various services: mobile app development, web development, e-commerce development, blockchain, and more. They primarily work with enterprise and midmarket clients in the e-commerce and business services industries.
Clients
- The University of Toronto
- Waste Connections
- Oz Leasing
- Beach Bandits
Industries
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TekRevol is designing and developing an online platform and mobile application for a publishing company. The platform and mobile app will allow users to rent and purchase books, amongst other functionalities.
“TekRevol provides the best customer service that I’ve encountered so far.”
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3
- $100,000+
- 1,000 - 9,999 employees
- New York, NY
DataArt is a software engineering firm in München, Germany; Zug, Switzerland; London, England; and New York. Founded in 1997, they have about 3,000 employees that serve mainly midmarket and small-business clients in the financial, healthcare, and IT sectors. Services include custom software development, enterprise app modernization, and UI/UX design.
Clients
- The Carlyle Group
- Nasdaq
- Apax Partners
- Monex
Industries
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DataArt provides e-commerce solutions for a B2B marketplace. The team is responsible for creating an automated and scalable solution that can be operated in multiple countries.
"They try to solve problems in challenging times, which is highly appreciated."
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4
- $10,000+
- 250 - 999 employees
- New York, NY
A tech frontrunner since 1989, Zco is a full-stack app development firm offering web, mobile, and animation services. Headquartered in Nashua, New Hampshire with a Boston office, the 200+ specialists comprise a powerhouse team with outstanding and varied proficiencies.
Clients
- Golflogix
- Volkswagen
- Microsoft
- Harvard University
Industries
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Zco developed and refined a hybrid mobile teledermatology platform and an admin website for a healthtech company. The team also coordinated KPIs and created a growth and expansion plan for the client.
"Zco nailed it!"
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5
- $50,000+
- 250 - 999 employees
- New York, NY
ArcTouch was founded in 2008 and has offices in San Francisco, Calif., New York, and Florianópolis, Brazil. They excel at app development, blockchain, and UX/UI design. They guide their enterprise clients through the app building process by defining a strategy for the best user experience, planning the visual design, developing and testing the prototype, and ensuring optimization and growth.
Industries
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ArcTouch has developed a mobile application for McCormick & Company. They created the app’s UI/UX design using Figma and Flinto. ArcTouch has also developed the app’s iOS and Android versions.
“ArcTouch’s UI/UX design is great, and they’ve developed a delightful app that users enjoy.”
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6
- $100,000+
- 250 - 999 employees
- New York, NY
Founded in 2007, Theorem is a software development firm. The midsize team specializes in custom software development, ux/ui design, IoT development, IT strategy consulting, and more. The company is based in Los Angeles, California; Santa Monica, California; New York, New York and San Francisco, California.
Clients
- AT&T
- Starbucks
- Caterpillar
- American Express
Industries
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TheoremOne developed a strategy and an MVP for an oil and gas construction marketplace. They provided a full delivery team, two full stack engineers, and QA testers.
"Their thought-leadership in design and their ability to quickly pick up on what we were looking for from the platform."
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7
- $25,000+
- 50 - 249 employees
- New York, NY
Jahnel Group, Inc. is an application development company based in Schenectady, N.Y., with offices in New York and Plano, Texas. The company, founded in 2012, has around 90 employees and provides custom software development, web development, mobile app development, and UX/UI design services. Jahnel Group, Inc. serves midmarket and other-sized companies and institutions in the business services, financial services, gaming, education, manufacturing, medical, and e-commerce industries.
Clients
- Atos
- Bethesda
- Cambridge Associates
- Discovery Channel
Industries
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Jahnel Group, Inc. integrated Recharge Payment into a sparkling water company's Shopify. The team customized the client's subscription offer to be a 24-month subscription instead of a 12-month.
"I felt as though they were an extension of our team."
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8
- $5,000+
- 50 - 249 employees
- New York, NY
Bit by Bit Computer Consultants is a 54-person IT firm founded in 1987. With headquarters in New York, they offer IT managed services, cybersecurity, custom software development, and other IT consulting & SI. They serve small and midmarket businesses in the financial, legal, and nonprofit industries.
Clients
- Financial Services
- Non-Profit
- Legal
- Business Services
Industries
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Bit by Bit Computer Consultants provides managed IT services for a financial services company. The team provides resources to handle the client’s office needs from desktops and servers to IT infrastructure.
“They’re responsive and committed to their work, so I feel confident whenever I ask them for something.”
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9
- $10,000+
- 10 - 49 employees
- New York, NY
7L International, a small software development company, is based in New York, New York. Launched in 2016, the team focuses on custom software development, mobile app development, e-commerce development, and IoT development.
Clients
- TikTok
- PowerPlay Studio
- Company.co
- Quake Media
Industries
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7L International is helping a software company build their MVP. They've researched different tools for the initial product and are now working on the development phase.
"They offer cross-functional teams to give the best result to the customer."
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10
- $10,000+
- 50 - 249 employees
- Brooklyn, NY
Launched in 2021, CXR is a digital strategy company. Their midsize team is based in Brooklyn, New York. Their team specializes in digital strategy, mobile & app marketing, AR/VR development, and corporate training.
Clients
- HBO Max
- Modelo
- Dropbox
- Cartier
Industries
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CXR Agency redesigned an e-commerce website for a workwear apparel company. The team was responsible for revamping the Shopify architecture, homepage, navigation, search filter, and other features.
"What impressed me the most about CXR Agency was how they treated us as a partner."
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11
- $25,000+
- 50 - 249 employees
- New York, NY
Ergonized is a CRM consulting company, based in Lviv, Ukraine. Founded in 20007, their team of about 30 serves clients in the financial services, healthcare, and marketing fields. Services include CRM, CMS, and platform development.
Clients
- ExactData
- Hub
- Rec
- WorkPlace
Industries
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Ergonized outstaffs development support and services to a health and fitness platform. Their work has included extending a WordPress site’s front- and backends.
“The ease of doing business with Ergonized sets them apart.”
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12
- $10,000+
- 10 - 49 employees
- New York, NY
New Peak Solutions is a SharePoint consulting and software solutions company with offices in New York. Founded in 2003, they have two employees specializing in custom software and mobile app development and IT consulting for various clients throughout the United States. Their expertise covers SharePoint, Office 365, ERP and CRM integration, and mobile, custom, and cloud development.
Clients
- Marshall IP
- Carnegie Hall
- Mount Auburn
- Moveo
Industries
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New Peak Solutions provided a website redesign. Their team added new functionalities and site sections.
"The end result of the site was even more than I expected."
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13
- $10,000+
- 50 - 249 employees
- New York, NY
ModLogix, founded in 2014, helps their clients transition legacy applications to new platforms. This involves services such as cloud migration, API integrations, and web application upgrades. Primarily, their team of fewer than 10 employees offers enterprise app modernization services for midmarket clients. The team is based in New York, New York.
Industries
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ModLogix upgraded an application from MVC to .NET Core 3.1. Along the way, they introduced optimizations to the platform code. This involved re-writing modules from scratch.
"We liked the level of communications, transparency, and desire to go above and beyond to get the job done."
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14
- $5,000+
- 10 - 49 employees
- New York, NY
Slashdev is a small software development company. The Winter Park, Florida-based company was established in 2021. Their services include custom software development, web development, mobile app development, wearable app development, and more.
Industries
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Slashdev has provided a senior Flutter developer to augment a software development company's internal team.
"We knew what we wanted, and they delivered quickly."
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15
- $25,000+
- 50 - 249 employees
- New York, NY
Incepteo is an innovation-led ‘IDEA TO MARKET’ technology services firm providing 360-degree offerings starting from software development, hosting, support, and digital marketing. Our mantra is to deliver growth outcomes with entrepreneurial vision, effective user experience, and innovation. We bring start-up know-how, corporate maturity, and strategic techno- entrepreneurial experience on the table from inception to growth phases.
Clients
- Geodis
- Betterlogic
- Capium
- Vision Engineering
Industries
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Incepteo provides a consulting company in the pharmaceutical industry with development services. They're currently developing web and data-oriented apps for the client's customers to use.
"Incepteo has been able to ramp up their teams to meet our needs, even for our new development initiatives."
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16
- $5,000+
- 10 - 49 employees
- New York, NY
NIFTIT is a design and development agency based in New York, with an office in Ho Chi Minh City, Vietnam. The agency, founded in 2013, has a team of around 20 that provides, among others, ECM consulting & SI, IT managed services, and applications management & support services to various organizations, institutions, and companies.
Clients
- The New York Metropolitan Transportation Council
- The Sports & Arts in Schools Foundation (SASF)
- Viedam
- Smile Train
Industries
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NIFTIT provides ongoing IT support for a reproductive health nonprofit. Their work includes digital transformation and backend development for a staff portal.
"They were always easy to get a hold of and can implement solutions with short notice."
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17
- $25,000+
- 10 - 49 employees
- New York, NY
The Smyth Group is a digital agency founded in San Diego in 2005. Their team of more than 10 specializes in UX/UI design, custom software development, and web development solutions for mid-market and enterprise-level clients.
Clients
- Columbia Sportswear
- MedStar Health
- VW of America
- AgMark Logistics
Industries
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The Smyth Group has streamlined a motor vehicle manufacturing company's digital strategy. They have audited the client's content and structure and gathered both the internal and external stakeholders' feedback.
"They're clearly a smart group of hand-picked individuals, focusing on creating custom solutions for custom problems."
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18
- $10,000+
- 50 - 249 employees
- New York, NY
FusionHit is a San Jose, Costa Rica-based software development company with offices in Los Angeles. Their team of fewer than 250 employees offers custom software, mobile app, e-commerce, and web development services. They were founded in 2008.
Clients
- Alliance Partner Group
- Workwell Technologies
- CSE Insurance
Industries
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FusionHit provides staff augmentation services, and they’ve worked on multiple projects over the course of the partnership. They’ve worked with React.js, Node.js, Microsoft Dynamics, and WordPress.
"FusionHit is able to set good expectations and deliver on them."
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19
- $1,000+
- 2 - 9 employees
- New York, NY
Armix Group is a digital strategy agency based in New York. This company has 10+ emploees and was founded in 2006. Services offered by Armix Group include SEO, mobile app development, and web development.
Clients
- Barnes&Noble
- Intuit
- MetLife
- Relocation
Industries
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Armix Group built a WordPress website from the ground up for a New York City-based sightseeing company, helping them to establish email marketing and optimize their content for SEO.
“They always respond quickly, are very straightforward, and most importantly, they listen.”
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20
- Undisclosed
- 10 - 49 employees
- Staten Island, NY
Digital Edge Ventures is an IT services company based in Staten Island, N.Y. Founded in 1996, the team of 13 specializes in cloud consulting and SI, cybersecurity, and custom software development. They work primarily with small business clients, mainly in the financial services industry.
Clients
- MACY’s
- March of Dimes
- NYC Health + Hospitals
- Numerix
Industries
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Digital Edge Ventures provided IT consulting and SI for a financial services company. The team solved the issues by updating all Citrix servers, reviewing SSL certification, and reversing previous changes.
"The president of Digital Edge Ventures always took an active role in overseeing our projects."
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21
- $25,000+
- 10 - 49 employees
- New York, NY
Abac is a custom software development firm. Founded in 2016, the agency is in Cluj-Napoca, Romania. The small team focuses on custom software development, mobile app development, web development, cloud consulting & SI, and more.
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22
- $25,000+
- 10 - 49 employees
- Rutherford, NJ
Incipient Corp. is a software development group based in Rutherford, N.J., and founded in 2011. Their team of fewer than 50 provides custom software development, cloud consulting, and IT strategy consulting solutions for clients in the industries of manufacturing and business services.
Clients
- Amneal Pharmaceuticals
- Shadow Delivery
- Billy Joe’s Ribworks
Industries
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Incipient Corp. developed and implemented technical architecture for a complex ride scheduling and dispatch web application. It was created for a third-party client of a design and development company.
"They’re good at achieving the end result."
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23
- $25,000+
- 2 - 9 employees
- New York, NY
BLUEPORTAL, LLC is an IT company founded in 2015 and run by more than 10 people. Based in New York, they offer custom software, web, and mobile app development solutions, primarily to small and mid-market clients in the fields of financial services, health care, and e-commerce.
Clients
- Areale Counseling & Wellness, LLC
- YouDivine
- Valley of Rockville Centre AASR
Industries
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BLUEPORTAL, LLC designed, developed, configured, and deployed a content management system. The solution includes secure administrative functions along with a backend API.
"BLUEPORTAL, LLC engaged with me in a detail-oriented, proficient way throughout this project."
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24
- $25,000+
- 2 - 9 employees
- New York, NY
Based in New York, New York and Great Barrington, Massachusetts, YoJonesy is a custom software development firm. The small team provides custom software development, ux/ui design, mobile app development, Artificial Intelligence, and more and was founded in 2019.
Industries
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A video production company hired YoJonesy to overhaul the company’s website. They aim to generate organic web traffic by adding marketing page efforts and redesigning the whole site.
"A top-notch work from a wildly talented team of YoJonesy."
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25
- $100,000+
- 250 - 999 employees
- New York, NY
Founded in 2014, PYCOGroup is a development firm. Their team of around 370 employees is based in Brussels, with an additional office around the globe. They focus on custom software, web, and mobile app development.
Clients
- Microsoft
- American Express
- Volkswagen
- Coach
Industries
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PYCOGroup designed and developed a government-funded mobile app to promote travel. While the internal team focused on the database and API, PYCOGroup focused on everything else, including delivery.
"The workflow was very fluid, efficient, and professional on PYCOGroup's side."
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26
- Undisclosed
- 50 - 249 employees
- New York, NY
Coral Team is a midsize big data analytics company. They provide BI & big data consulting & SI, CRM consulting and SI, custom software development, and mobile app development and were established in 2002. The company is headquartered in New York, New York.Visit SiteIndustries
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27
- Undisclosed
- 1,000 - 9,999 employees
- New York, NY
IT managed services company Emtec Inc. Was launched in 1997. Based in Jacksonville, Florida; Chicago, Illinois; Suwanee, Georgia and Athens, Alabama, their midsize team offers IT managed services, cloud consulting & SI, custom software development, Artificial Intelligence, and more.Visit SiteIndustries
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28
- $25,000+
- 250 - 999 employees
- Staten Island, NY
Nitka Technologies, a software development company, is headquartered in Staten Island, New York. The company focuses on custom software development, web development, IT managed services, IT staff augmentation, and more and has a midsize team.The company was launched in 1995.Visit Site -
29
- $10,000+
- 50 - 249 employees
- New York, NY
DMC, Inc. is an engineering and development firm founded in 1996. It is headquartered in Chicago, but has other locations in Somerville, Mass.; Denver, Colo.; New York, N.Y.; Houston, Texas; and St. Louis, Mo. DMC, Inc. has about 150 employees. While DMC's origins are in robotics and manufacturing automation, they currently offer custom software development and big data consulting services.
Clients
- 3M
- Ford
- Cadbury
- Bosch
Industries
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A large ground logistics firm hired DMC to develop a unique IoT device for their centrally-owned fuel depots. DMC created a device to speed up the refueling process and provide useful data to the firms that own the depots.
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30
- $25,000+
- 250 - 999 employees
- New York, NY
Custom software development company Worldwide TechServices Software Solutions was founded in 2008. In New York, New York and Tewksbury, Massachusetts, their midsize team focuses on custom software development, IT staff augmentation, mobile app development, web development, and more.Visit SiteIndustries
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