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Techstack company is an international strategic technology partner with strong Ukrainian roots, delivering comprehensive digital transformation services worldwide. We unite nearly 200 experts across borders, combining staffing, engineering, and optimization services into one powerful offering. With over a decade of excellence, we’ve become a trusted partner for global businesses — 30% of which are $1B+ enterprises — delivering full-stack teams and empowering software engineering leaders. Rooted in our Ukrainian engineering heritage and strengthened by our international presence, Techstack unites the best of Eastern European technical excellence with global business practices, making us a partner capable of both precision in execution and vision in strategy. 💫 The Techstack Difference
Strategic Partnership:- Engineering with product ownership, aligned with your goals- Strong technical leadership and proactive delivery planning- Long-term scalability built into every architectureProfessional Excellence:- Senior-level expertise across all technologies- Cross-functional teams with diverse skill sets- Proficiency with modern tech stacksTransparent Communication: - Regular updates and detailed reporting- Direct access to your dedicated team- Clear project roadmaps & milestone trackingQuality-First Approach:- Rigorous code reviews and comprehensive testing protocols- Strict coding standards adherence- Industry best practices in every deliveryBusiness Value Focus:- Transparent pricing with no hidden fees- Resource optimization strategies- Value-driven development aligned with your goals- Scalable architecture design- User-centric development methodologyModern Technical Capabilities: - Cloud-native solutions- AI & ML integration|- Automated workflows- Agile methodology- Advanced DevOps practicesWe align with your product and business strategy, bring disciplined engineering practices, and build solutions designed for scalability, resilience, and long-term growth. Let’s build something that lasts! 

Leobit is a full-cycle . NET, AI, and web application development provider for technology companies and startups primarily located in the US, EU, and the UK. We have representative offices in Austin, TX (USA), Tallinn (Estonia), Kraków (Poland), London (UK) and the development center in Lviv (Ukraine) with 170+ talented software engineers, architects, QA experts, and UI/UX designers. Our Achievements:Microsoft Solutions Partner - Digital & App InnovationISO 9001:2015 and ISO 27001:2022 CertifiedISTQB Platinum PartnerTop . NET Developers in 2025 by ClutchCustomer Service Department of the Year in 2025 by Stevie® AwardsLeobit has successfully delivered over 150 well-designed and well-factored web & mobile applications to technology companies ranging from Fortune 500 firms to Silicon Valley startups. Our Services:. NET software developmentAI/LLM software developmentCustom software developmentDedicated development teamWeb app developmentMobile app developmentCloud developmentSoftware architecture designUI/UX designBusiness analysisQuality assuranceApp support & maintenanceTechnology consultingOur Key Technologies:Microsoft Stack: . NET, ASP. NET, C#, Azure, WCF, Entity Framework, MaUI, BlazorWeb/Frontend: React, Angular, Vue, jQuery, TypeScriptBackend: . NET Core/C#, Ruby, Node, PHP, PythonMobile Technology Stack: iOS, Android, Flutter, Swift, KotlinAI integration

Lampa Software is a team of Android, iOS, and web application developers located in the heart of Europe — Ukraine. 💡9+ years on the market 💡Average MVP development time: 2 months💡180+ projects and 95% satisfied partners💼 The fastest case: from concept to release in 4 daysWe have highly-skilled developers who are always ready to show their expertise with the most complex tasks. We work on implementing all the client’s ideas, and our customers receive a satisfying result in the shortest terms. Our main domains are IoT, LMS, Enterprises, Startup projects, E-Commerce, E-Health, VOD/ OTT, FinTech, Social Networks, Tourism, Pet Tech, and Pet Health. What we do?Android and iOS applicationsREACT web platformsOTT services and Smart TVChats and social servicesDelivery and taxi servicesLoyalty programsHigh-load native appsVOD/HLS video appsAstonishing WebsitesPlatforms for online consultingCrypto and much, much more. What technologies do we use:for mobile apps: Kotlin, Java, Swift, Flutterfor backend: Python, Node. jsfor web: React. jsFor details, contact us! 💡

CodeGeeks Solutions is a software development company led by top-notch experts with over 15 years of experience in the industry. We are passionate about delivering innovative solutions, combining technical excellence with a deep understanding of our clients’ industries. From startups to enterprises, we’ve helped numerous businesses automate workflows, optimize processes, and enhance user experiences. With expertise in AI and SaaS development, we help companies streamline operations, boost efficiency, and drive growth. Our services include mobile and web app design, custom software and AI development. At CodeGeeks, transparency, collaboration, and a customer-centric approach drive every project.  

Coderfy, a bespoke software development company, specializes in crafting tailored solutions for diverse industries, including web and software development, quality assurance, UI/UX design, and advanced ChatGPT chatbots. Based in Ukraine, USA, and the UK, we provide cost-effective and timely solutions, seamlessly executing projects aligned with your strategic goals. Experienced in: Custom Software Development🚀💻: We create scalable, robust, and tailor-made software solutions that drive efficiency and growth for businesses of all sizes. Web Design and Development🎨🌐: Our team of expert designers and developers craft stunning websites and web applications that leave a lasting impression on users while delivering exceptional functionality. Mobile App Development📱✨: We excel in developing feature-rich mobile apps that cater to diverse platforms, ensuring seamless user experiences. IT Consulting🤝🔍: Our seasoned consultants provide strategic guidance to help clients leverage technology for competitive advantage, offering insights that align IT with business goals. Custom ChatGPT chatbots🤖💬. Leveraging OpenAI's advanced language models, we design and develop custom ChatGPT chatbots that enhance customer engagement, streamline operations, and provide valuable assistance on your website in 24 hours. Stack Programming Languages📝💻: JavaScript, TypeScript, PHP Frontend🖼️🌐: React, Angular, Next. js, Nuxt. js, Vue. js, HTML/CSS/JS + JQuery, Bootstrap, Tailwind, yii2 Mobile App Development📱🚀: React Native, Flutter Backend⚙️🔧: Node. js, Express. js, Nest. js Databases🗃️🔍: MySQL, MongoDB, Redis, Firebase DevOps and Repositories🛠️🔄: Linux Repositories, Docker, Kubernetes, CI/CD, Git, Gitlab, Github Other Technologies🌐🔧: Nginx, Strapi, Sendgrid, Postman, Twilio, REST API, WebSocket Choose Coderfy for a customized approach to software development that's "Half the price & Faster twice!"

UKEESS Software House is a custom software development and consulting company. Our services are not limited to outsourcing for software vendors and custom application development for ultimate customers. We also provide augmentation services for your existing teams, creating small development excellence teams for your enterprise, BP modeling and analysis, quality and comprehensive testing for existing software solutions, full-time software support for developed solutions, IT consulting, and remote administration.

New Line Technologies is a software development company with 15+ years of experience specializing in FinTech and Real-Time Multimedia solutions. We provide full-cycle development and ongoing technical support to clients in the USA and Europe, helping them navigate complex industry challenges with scalable, innovative software.  Our expertise lies in creating secure financial applications, high-performance multimedia systems, and interactive solutions that leverage real-time technologies to deliver seamless user experiences. Our industry focus and deep technical proficiency allow us to support clients from concept to deployment, ensuring a perfect alignment with their business goals.

Hesh is an operating system for the craft economy. We offer a comprehensive solution for small and medium-sized businesses (SMBs) in manufacturing. The platform combines the functionality of Product Lifecycle Management (PLM), Enterprise Resource Planning (ERP), Manufacturing Execution Systems (MES), and Material Requirements Planning (MRP), all working together with AI-powered agents.

✅ We effectively cooperate with non-technical clients, providing CTO-as-a-Service solutions. If you are at the beginning of the startup path, we are the right team to assist you with the technical aspect of your project. 🧩 If you already have a team and the product on the market, we can collaborate on a team augmentation basis. Our developers are proficient in English, attentive to details, and can efficiently work with your in-house engineers and managers. It will be a missing puzzle that will fit perfectly into your ecosystem. 🎯 Our main focus and expertise are in the following domains: - On-demand Map-based apps; - Social-networking apps; - Photo & Video apps; - Dating apps; - Sport and Fitness; - Wellness and Healthcare; - eCommerce; - FinTech. 💎 We have a proven 5-year history of successful consulting and full-cycle development cases in the digital area. 💻 Here is our tech stack:- Swift, Objective-C for iOS;- Java, Kotlin for Android;- Flutter & React Native for Hybrid apps;- React. js for web pages;- Node. Js for the backend. 🔐 We have high standards in code creation and contributed to the open-source dev community. But what’s more important, we have an organized delivery process, tailored for every project because no two cases are alike. For making our Code perfect, we integrate Unit tests, do daily Pull-Requests & Code Reviews, apply Automated testing, and use styling libraries, that allow us to keep the same pattern of coding when working as a team. 🌐 Our partners are located in Canada, the US, and Israel and we have successful cooperation cases in which our devs became dedicated team members of our partner’s company. It just feels like you are working with in-house product engineers. 📌 We are currently open for new collaboration so if you need a streamlined and proficient development team for your geolocation-based, social, or wellness project, feel free to get in touch with us.

Tubik is a digital agency that, since 2013, has been helping both large and small businesses employ design to improve communication with their customers or users and increase sales of products and services. With us, you can create a new visual image for your brand, develop an interface for a mobile application, as well as create and launch a website or a bright marketing campaign. We find ways and solutions to achieve the goals of our clients utilizing design.

Since 2007, Avivi has been developing business software, namely custom CRM systems and add-ons for off-the-shelf products, eCommerce project development, bot implementation, and application of blockchain technologies to solve business problems. The most significant were projects of an international logistics service for the delivery of goods from the USA, a unique CRM system for organizing the full cycle of production and sale of products of a sewing company, and the development of a Telegram bot for all types of transactions with leading cryptocurrencies. In working with clients, Avivi uses a purely personal approach to each individual order to create a product that best suits each individual business.

Emotion is a boutique digital studio that creates websites and web app designed to elicit strong emotional responses while delivering a seamless user experience. We design and develop interfaces, create concepts for digital products, and bring them to life. Our projects prioritize aesthetics, current technologies, and human-centric marketing. Our Services:Website (App) Design & Development: Promo sites, corporate platforms, multi-page websites, and e-commerce solutions with modern CMS and features. Digital Automation: Integration of analytics, CRMs, payment systems, and AI tools to streamline your business processes.  We offer tailored solutions to meet your goals and help your business grow. Let's explore how we can help you achieve your business objectives through exceptional web design, intuitive user interfaces, and strategic digital marketing!