Top C# Development Companies & Expert C# Developers in USA

World-renowned companies like Fox, Macy's, NBC Universal, and Cisco have relied on Blue Whale Apps as their digital partner for more than 17 years. We are experts at providing web development, UI/UX design, mobile app development, and AI consulting services that help companies grow. Our Services Include: Mobile App Development: Native and Cross-Platform Development (iOS, Android) Microservices architecture and API integration Continuous Deployment/Continuous Integration (CI/CD) Mobile App Security & Performance Optimization Cloud-Based Backend Solutions (AWS, Google Cloud, Azure) Development of Web Pages: PWAs, or progressive web apps Microservices and Serverless Architecture Front-end development using Vue.js, Angular, and React Backend frameworks (Ruby on Rails, Python, and Node.js) Design and Optimization of Databases (SQL, NoSQL) AI Consultancy: Predictive analytics and machine learning Solutions for Natural Language Processing (NLP) Deployment and Optimization of AI Models Process optimization, intelligent automation, and data science and big data analytics UX/UI & Product Design: Methodologies for User-Centered Design (UCD) Interactive Prototyping with Adobe XD, Sketch, and Figma Testing for Usability and Heuristic Assessments Libraries of Design Systems and Components Frontend Frameworks & Responsive Designs AI generative: Tools for Content Creation Driven by AI Algorithms for Deep Learning and Neural Networks Audio, Video, and Text-to-Image Solutions Adversarial Generative Networks (GANs) Creative Automation Powered by AI Looking for reliable mobile apps, cutting-edge web solutions, or AI-driven innovations? Get in touch with Blue Whale Apps today! Customized for Your Needs Whether you're a startup with a unique idea or a Fortune 500 company, we tailor our solutions to meet your specific requirements and goals.

We are a software development company offering a wide array of products and solutions to design and develop your desired software product. Hire dedicated web and mobile developers for all IT services to fulfill your project with 100% satisfaction. Crafting tailored digital solutions for your business. Expert in custom software, website and mobile app development, delivering innovation and excellence for your business.

Fifth LLC is a dynamic software development and design studio based in Armenia and USA, serving clients globally, including Silicon Valley, Europe, and Hong Kong. We Do: 1. Custom Web App Development 2. Mobile App Development 3. Web3 App Development 4. CTO Consulting for Startups Our dedicated team, composed of forward-thinking scientists and tech enthusiasts, specializes in building innovative and seamlessly integrated digital solutions.

Xopple Infotech believes simple solutions can solve the biggest problems. We provide services that cover all your digital needs of your business. Connect with your audience with a range of digital solutions like Website Development, Digital Marketing, Gaming and Animation Solutions, and Web and Mobile Applications.

A well-known IT firm with a focus on web, mobile, and custom software development is Sensation Solutions. Since 2013, we have provided cutting-edge digital solutions to businesses all over the world. Our skilled team serves sectors like healthcare, logistics, e-commerce, and real estate by providing services in web design, mobile app development, digital marketing, and quality assurance. We provide end-to-end services under one roof and flexible engagement models because we are dedicated to client satisfaction. We turn concepts into powerful digital experiences with more than a decade of experience, 300+ completed projects, and a presence in India, the USA, Canada, and Australia.

Founded in 2009 and headquartered in Houston, Texas, Meticul Solutions is a global technology and software development company specializing in custom SaaS applications, mobile app development, AI/ML, RPA, and eCommerce solutions. What began as a small web development firm has evolved into a full-service digital transformation partner with a distributed team spanning two continents. Meticul Solutions serves industries such as logistics, healthcare, fintech, and retail, delivering innovative, scalable, and cost-effective technology solutions. Our approach focuses on collaboration, transparency, and long-term client success, ensuring every project aligns with business goals and growth strategies. We offer flexible staffing models, dedicated development teams, and round-the-clock support, guaranteeing uninterrupted service and seamless project execution. With over 15 years of proven expertise and thousands of successful projects, Meticul Solutions has become a trusted partner for startups, SMEs, and Fortune 1000 companies worldwide. Our rigorous three-step developer selection process ensures access to top-tier talent across the tech stack, reducing hiring costs and accelerating innovation. At Meticul Solutions, we empower businesses to embrace digital transformation with confidence. By combining cutting-edge technology and global talent, we help organizations enhance efficiency, scale intelligently, and achieve sustainable growth in an ever-evolving digital landscape.

Creatus X is built for ambitious brands that want to thrive in the age of AI. Marketing has changed. Audiences expect relevance, speed, and experiences that feel personal. We help businesses meet that challenge with strategies powered by data, creativity, and intelligent automation. Our role is simple: to be the marketing partner that fuels your growth. We take ideas, insights, and innovation and turn them into measurable outcomes. Whether it’s smarter SEO, performance-driven ads, or a website designed to convert, our work is about impact, not noise. What We Do: We specialise in delivering end-to-end marketing solutions that drive real outcomes. Our core services include: AI-Powered Marketing Strategy: We help you see the path forward. Through data-driven insights and predictive analytics, we identify opportunities for smarter campaigns and higher ROI. SEO & Content Marketing: We position your brand to be discovered. Our strategies build authority, attract the right audience, and turn visibility into lasting growth. Paid Media & Ecommerce Advertising: We design campaigns that convert. From social media to search, we run intelligent ad strategies that scale your customer acquisition. Web Design & Development: We build digital experiences that inspire action. Our websites are crafted for speed, performance, and seamless user journeys that convert visitors into customers. Email & Retention Marketing: We help you turn one-time buyers into loyal fans through automated, personalised customer journeys that boost lifetime value.

We are a full-service digital agency helping businesses turn concepts into high-impact digital solutions. From custom website design and scalable web applications to strategic branding, logo creation, and visual identity, we deliver results that drive growth. Our experienced team combines creativity, technology, and strategy to build strong online presences and long-term digital success for B2B companies worldwide.

Connecting companies with outstanding offshore software talent from around the world is CoDev's specialty. Having worked in the field for more than ten years, we are committed to connecting businesses with a wide range of highly qualified software specialists. Our thorough, data-driven approach to talent matching is our strength; it guarantees that every client finds the ideal candidate for their unique project requirements. We make it easy and affordable to obtain top-notch software knowledge by managing every facet of hiring and integration. With our unmatched network of software specialists, we at CoDev are dedicated to providing your company with the best people and encouraging innovation and expansion.

I am a passionate mobile app developer dedicated to crafting innovative, user-friendly, and scalable applications. With expertise in cutting-edge technologies, I turn ideas into seamless digital experiences, ensuring high performance and engaging user interactions. Whether it's Android, iOS, or cross-platform solutions, I specialize in building apps that make an impact.

With an emphasis on client satisfaction, Lancera uses cybersecurity solutions and intelligent software development to promote business success. In addition to some of the biggest corporations in the world, they offer their services to firms of all sizes. Lancera can assist you if you're seeking for cybersecurity solutions, web and mobile application development, or software development.

A software development and consulting firm called Far Reach is located in Cedar Falls, Iowa. Customer portals, team portals, data visualisation systems, business efficiency platforms, mobile applications, SaaS platforms, and other systems are among the custom software systems that we create to aid firms in growing. Far Reach is your go-to partner if you have a business issue or opportunity and technology is the answer. We'll work with you to choose the best strategy, develop the platform, plan the system, and provide post-launch support.

Web apps, mobile apps, custom software development, ERP consulting, cloud storage solutions, business due diligence, robotic process automation, business process automation, and other b2b infrastructure solutions are just a few of the b2b services offered by Collinsville, Illinois-based Swip Systems. We can work with your firm to identify the best technological options to improve the effectiveness and efficiency of your daily operations. Swip Systems is your one-stop shop for all of your company's IT requirements; we can handle any problems your business may be having with technology.

Atomic Object is a U.S.-based custom software development company focused on building high-impact digital products that drive measurable business results. Our expert team designs and develops new software, enhances existing applications, modernizes legacy systems, and integrates AI-driven capabilities. As an employee-owned firm with offices in Chicago, Ann Arbor, Grand Rapids, and Raleigh-Durham, we deliver collaborative, high-quality solutions tailored to each client’s strategic goals.

Kalpita Technologies is a leading Enterprise Software Development company, delivering innovative and custom software solutions with AI technology. Since 2018, we’ve empowered businesses across the globe, improving operational efficiency and reducing costs through tailored solutions. Our core expertise spans across Fintech and Insurtech, where we leverage AI to streamline processes and deliver tailored & scalable solutions. We also excel in E-commerce, Healthcare, and Hi-tech, helping companies stay ahead with frontier technologies. Our services include, Website Development Mobile App Development Testing & Quality Assurance Data Solutions IT Consulting Business Intelligence At Kalpita Technologies, we blend agility with disciplined execution to deliver high-quality, client-focused solutions. Our flexible approach drives innovation while upholding precision and excellence. With a culture rooted in innovation, continuous learning, and teamwork, every Kalpitian thrives, contributing to our shared vision of shaping the future. As a Microsoft Gold Partner, an ISO and SOC II certified company, and a Great Place to Work (2022-2025), we’re committed to excellence in every project. We have offices in Bangalore and United States.

Techunting, founded in 2015 by Javier Rubio and Marcelo Teselman, is an IT company focused on software development and staffing. With over 20 years of experience, the company aims to bridge the talent gap in fast-moving technological environments. With headquarters in the US, European offices, and a main development center in Argentina, Techunting operates in the main LATAM countries. The company started working before the pandemic, accelerated during the Covid period, and continued to grow during the Ukraine war, achieving over two-digit growth over its history.

ACAP, a small business software solutions provider since 2004, has successfully served over 400 clients and delivered over 1000 projects through intelligent technology application and customer service expertise.

Distillery is a leading nearshore software development company that supports innovative technology teams by placing senior technical leaders and deploying fully managed teams. They work with brands like eBay, Carvana, City National Bank, and Rakuten to accelerate strategic innovation.

Kanda is a trusted full-service software engineering and digital transformation partner helping businesses rapidly deliver high-quality SaaS, mobile, and on-premises solutions. We combine deep domain expertise, senior engineering talent, and rigorous QA practices to build secure, scalable, and market-ready software. As a U.S.-based company with a long-standing reputation, we prioritize IP protection, compliance, and delivery excellence on every engagement. Our agile teams work closely with clients to accelerate development timelines, reduce risk, and turn software into a true competitive advantage that supports long-term growth and innovation.

We are among the fastest-growing technology companies in the United Arab Emirates, offering technology services to globally renowned brands through outsourcing. We maintain a careful balance between management, quality standards, and execution speed in order to provide our clients with effective service. Data Management & Analytics, Cloud Services, Custom Software Application Development, Artificial Intelligence, Robotic Process Automation, Metaverse Development, Block Chain, BPO, Digital Marketing, Web 3.0, and DevOps are just a few of the IT solutions that Dotlabs offers.

Bringing our clients the top computer solutions and technological competitive advantage possible is our area's specialty at CCPlus. For both small and large organisations, we offer a broad range of computer services. At CCPlus, we service networks and PCs, as well as offering sales, service, websites, upgrades, and installations of software and hardware, as well as data backup and storage options. Since we first opened for business in 1992, we have expanded.

Sibedge: Your Premier Partner in Global Software Engineering Solutions Sibedge is a leading software engineering firm specializing in digital transformation and innovative software solutions. With over 15 years of experience, we've successfully completed more than 350 projects across 27+ countries, making us a trusted partner for businesses worldwide. Our headquarters in Australia, combined with a network of skilled engineers globally, positions us to deliver high-impact services tailored to your unique needs. Our service framework is built around agile methodologies, ensuring flexibility and speed in project delivery. We offer five key services that prioritize collaboration and excellence: - Team Extension: Quickly augment your workforce with our remote teams of 3-5 engineers, ready to seamlessly integrate into your existing operations. - Agile Software Development: Experience effective project management that minimizes risks and maximizes business value through our agile approach. - Squads Product Development: Leverage our multidisciplinary squads, including UX designers and quality engineers, for comprehensive product development that drives continuous improvement. At Sibedge, we believe in strong partnerships. Our process includes understanding your needs, building dedicated teams, and managing smooth transitions to ensure your success. Choose Sibedge for your software development needs and watch your business thrive.

Genetech Solutions, a reputable technology company, was founded in 2004 and has since become a leading player in the technology industry, delivering innovative software solutions and IT services. With a focus on delivering high-quality products and exceptional software services, Genetech Solutions has established itself as a trusted partner for businesses seeking AI solutions, customized software development, web and mobile app development, and digital marketing services. The company's commitment to staying ahead of technological advancements and industry best practices sets it apart in the competitive IT landscape. With a strong track record of successful projects and satisfied clients, Genetech Solutions continues to be a leading player in the technology industry.

Diffco is a Silicon Valley–based software development company providing businesses with dedicated teams of senior developers to accelerate product success. With over 16 years of experience in mobile app development, web development, and AI solutions, we deliver secure, scalable software tailored to business goals. Our award-winning team emphasizes clear communication, reliability, and long-term partnerships. From product ideation and UX strategy to advanced technical implementation, ongoing development, and support, Diffco manages the full product lifecycle—helping startups and enterprises launch faster, scale efficiently, and stay competitive in evolving markets. Why Diffco? Client-driven approach; Transparent processes and billing; Always clear communications with you about everything; Only dedicated project teams with no cross-project sharing; Detailed reporting and deliverables. Elevate your business with Diffco experts. Let’s chat and get you on the new journey to success.

Ajroni is a full-service digital marketing and web development agency helping businesses strengthen their online presence and drive measurable growth. We deliver integrated solutions including website design and development, custom software and app development, SEO, and data-driven digital marketing. Having supported hundreds of companies across diverse industries, our team combines proven strategies with creative execution to build strong, scalable brands. By deeply understanding your business goals and target audience, Ajroni creates high-performing digital experiences that attract, engage, and convert both current and future customers.

For technology executives looking for top-tier software development resources and expert consulting services, Accelerance is the leading worldwide software outsourcing authority®. To eliminate the effort and uncertainty associated with outsourcing, we present the ideal partner for your company's requirements. Accelerance has been curating the greatest global network of reputable software development and systems integration companies for over two decades. The top 1% of companies are personally vetted and certified by us, giving you exclusive access to thousands—not hundreds—of the best developers and technical resources in more than 40 countries.

Slingshot is a U.S.-based software and app development company transforming ideas into fully functional digital products. Using a unique 4-step, user-focused process, our strategists, designers, and developers craft personalized web and mobile applications tailored to your business needs. Whether you’re a Fortune 500 enterprise optimizing workflows or a small business launching an app, Slingshot delivers scalable, innovative solutions while building lasting partnerships to guide your digital growth confidently into the future.

Rudra Innovative Software builds custom mobile and web software for enterprises that are easy to use. Our team of talented business analysts, developers, and designers work across various industries to build custom software solutions. Since 2008, Rudra Innovative Software has launched more than 1000+ projects. Our clients are leaders in healthcare, financial services, e-commerce, and beyond.

Slashdev screens over 2,000 developers monthly and takes less than 1% into its network, ensuring the best engineers worldwide for your project. Unlike platforms like Upwork, our engineers undergo extensive vetting and testing to ensure they can deliver on day one. We are a modern global talent partner, helping you find part-time or full-time remote developers at an excellent value. Unlike traditional recruiters who charge large upfront fees and only help you find talent in your city or country, we are a global first company and charge nothing for recruitments, significantly beating the competition who charge $50-$100/hr for the same developer.

Located in Denver, Colorado, Epic Apps is a leading software design and development agency that has been crafting custom website and mobile app solutions since 2012. We excel in transforming ideas into robust digital assets for businesses, government agencies, entrepreneurs, and non-profits, boasting a successful history of delivering hundreds of innovative applications. Our Specializations - Mobile App Development: Our expert team specializes in creating high-quality, scalable mobile apps for iOS and Android using advanced technologies like Swift, Java, React Native, and Flutter. - Custom Website Development: We design and build performance-driven websites with various frameworks, including WordPress, React, .NET, and Ruby on Rails, ensuring security and tailor-made solutions for each client. We provide dedicated resource options for smooth collaboration with your IT team, ensuring precision and efficiency in achieving project objectives. At Epic Apps, we seamlessly blend creativity with technical know-how to empower businesses and stimulate innovation. Elevate your digital presence—contact us today for a complimentary consultation to explore your project needs!

Sofmen is an application engineering firm that designs and develops end-to-end software solutions. Because of our over 20 years experience and proven business acumen, we are able to provide you with sound advice. Whether you are building new software from scratch, transitioning from existing solutions, or if you need code review or bug fixes, we are with you every step of the way, offering guidance and our multi-faceted expertise.

Axon is a software development firm that offers full-cycle software development services of any complexity with a focus on developing turnkey software solutions. Our goal is to deliver high-quality software to our clients by making sure their projects are completed on schedule, with predictable prices. We've continuously improved the company's engineering caliber over the last ten years, which has allowed us to take on extremely challenging problems. This covers sophisticated data processing platforms, extensive systems integration, and customized software for a variety of sectors.

We are a business app development and IT consulting company dedicated to accelerating digital transformation for enterprises worldwide. Our mission is to fuel growth through innovative, secure, and scalable technology solutions—delivered with flexibility, transparency, and creative problem-solving. Our team includes web and mobile developers, system analysts, QA specialists, DevOps engineers, project managers, and UI/UX designers, handpicked to integrate seamlessly into your workflows. We bring deep expertise in IT audit, enterprise web and mobile development, AI/ML, Big Data, AR/VR, and IoT solutions. Working within an efficient Time & Material model, we operate in short 1–2 week sprints, delivering measurable results and real-time progress demos. Adjustments are implemented quickly to keep projects aligned with your goals. Who We Are • 15+ years in the global tech market • 450+ skilled professionals • 350+ successful projects for brands like IKEA, Disney, Mary Kay & Rolling Stone Our experts—each with 5–14+ years of experience—ensure every solution drives tangible, lasting business impact.

QSS Technosoft Inc is an expert web and mobile app development company consisting of a team of Android/iOS developers, UI/UX designers, graphic artists, and project managers who can deliver productive services for developing your innovative web or mobile apps. We have vast expertise in delivering scalable & eye catch-on-demand mobile apps based on multiple domains.

ServalIT is a software development service provider with a team of experienced, cross-functional developers capable of creating quality, scalable, and maintainable solutions. They use a flat management organization with no middle managers, ensuring better coordination and communication with clients. ServalIT uses Scrum as their preferred agile methodology framework, but can adapt to best practices in coordination with clients. Their team is ready for challenges in Systems Integrations, DevOps, and Web Programming, and they are not limited to any specific technology stack, ensuring a flexible approach to their services.

Scalo is a trusted technology partner specializing in custom software development and dedicated development teams. Through our proven Scalo Way methodology, we deeply understand your business goals, technical requirements, and product vision before delivering tailored solutions and flexible collaboration models. With nearly 15 years of experience and 300+ successful projects, we support leading brands like ING, Santander, Capgemini, and CRIF with scalable, high-quality software solutions.

Our company specializes in building dedicated product teams and integrating them into your company. We match software experts with engineers, ensuring a seamless growth of your software department. Our team includes full-stack developers, solution architects, QA managers, and technical project managers. We have experience in various industries, including FinTech, Biotech, Healthcare, eCommerce, and News. We have expertise in Java, Python, Swift, React, Go, Django, Angular, Ember, Ruby on Rails, Agile, Kanban, Waterfall, and Six Sigma methodologies. We have successfully helped clients migrate to microservices-based architecture.

Because of our experience with banking systems and interconnections, we have been at the forefront of creating mobile applications and systems for the biggest financial institutions in the region since our foundation in 2003. Since then, we've expanded our expertise in the retail, insurance, fintech, payments, and health care sectors. We develop digital solutions with the best IT skills. By creating top-notch software solutions in line with strict guidelines for nearly two decades, we have gained the trust of our clients. Our services include UX/UI design, RPA, staff augmentation, turnkey projects, and innovation consulting. Stanford University has recognized Bayteq for promoting innovation in Ecuador through our Innovation Lab. We have significantly impacted our clients with the use of design thinking.

SDNA Tech transforms concepts into real-world applications that are scalable, dependable, and appealing to consumers. We are inspired by your ideas and want to help you bring it to life.

Sunmait Technologies, a US-based software development firm, specializes in fintech and e-commerce, collaborating globally in 20+ countries. Key features include: 7+ years in the global software market 250+ skilled specialists in Europe and the US 140+ successfully completed projects worldwide Offices in the USA, UAE, Poland, and Georgia Client-friendly time zone for seamless collaboration Extensive expertise in fintech and e-commerce Flexible collaboration options

We are an offshore software development and outsourcing firm, delivering industry-led benchmark solutions for those who strive to mark their presence!

From idea validation to a customer base of millions, we assist innovators in creating fantastic products and businesses. We can meet your product demands whether you are a Fortune 500 company, a unicorn with quick growth, or a one-person startup. Product planning, UX/UI, visual design, iOS, Android, web development, testing, DevOps, growth hacking, and more are all part of our services stack.

Codebridge is a technology consulting and custom software development firm focused on building scalable, high-impact digital solutions. We specialize in mobile app design, UI/UX strategy, and DevOps services, helping businesses streamline operations, accelerate innovation, and achieve sustainable growth through tailored, future-ready technology.

As a mobile app development company, OSTRYX provides full-cycle app development—from planning to deployment. We support various industries and platforms, ensuring all solutions meet business goals and end-user needs without compromise.

A privately held software solutions company with headquarters in the US, Concept Software & Services, Inc. (CSS) offers Fortune 500 businesses and government organizations value-added services for small start-ups. We are an all-inclusive IT consulting firm that specializes in software product development, digital marketing services, bespoke software development, IT training, and hiring qualified personnel.

You don’t just need a brand—you need a presence. At Design Henge, we craft bold, high-impact digital experiences that make your business unforgettable. We’re not just any digital agency in Chicago—we’re the one that makes brands impossible to ignore.

Ramam Tech is an emerging technology solutions company focusing on using new technologies in IT solutions, Web and software solutions, and digital business transformation. By producing high-quality results and catering to the unique needs of their clients, Ramam Tech enables companies to improve and optimise their growth significantly in today’s world. Our services include custom software solutions, mobile application development, cloud solutions, and information security, among others, leveraging new-age technologies for optimization and security. In its turn, Ramam Tech works with clients from various industries and realizes their ideas to create key applications that would be beneficial for the contemporary world.

Founded in 2001, Smith Consulting is a trusted leader in DNN, Orchard, and WordPress eCommerce development and ERP integration solutions. With over 25 years of combined experience in software engineering and payment processing, we deliver secure, scalable, and customized platforms that optimize online sales, streamline transactions, and drive business growth worldwide.

TechMatter is a leading global provider of technology and healthcare solutions headquartered in Glendale, California. The company specializes in enterprise software development, automation, and revenue cycle management, empowering organizations to streamline operations and achieve sustainable growth. With a strong presence across the U.S., U.K., Middle East, and Asia, TechMatter delivers cutting-edge digital transformation services designed to enhance efficiency, reduce operational costs, and drive innovation across industries.

Improving is a modern technology consulting, development, and training firm headquartered in Dallas, Texas. With 20 locations (and counting) across North America and over 3,000 full-time consultants, we have no shortage of resources, experience, or expertise. Our motto is 'Trust Changes Everything' and we strongly believe that companies flourish when they establish environments of trust. To bring value to our stakeholders, we consider it our first job every day to build that trust by creating transparency, delivering results, practicing accountability, and demonstrating respect. With this as our focus, we hope to elevate the perception and impact of the IT professional within their own organizations and the community in general.