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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! 

Intsurfing, established in 2016, specializes in big data. We build robust data pipelines, ETL processes, and data harvesting flows. Our team leverages Scala, Java, . NET, C#, and Python on AWS, GCP, and Azure platforms to ensure your data infrastructure is efficient, secure, and built to handle growth. Our clients gain the ability to collect, process, and analyze data from nearly any source—websites, images, PDFs, and multilingual documents. Whether you need real-time data for operational decisions or structured insights for long-term strategies, we make it happen. In 2020, we launched Nannostomus, a cloud-based tool that simplifies web scraping. It empowers teams, even those with minimal technical skills, to collect and utilize web data while keeping costs low.  Choose Intsurfing for your next big data initiative and benefit from the expertise behind 220+ completed projects.   

Full-cycle iOS and Android Application development agency from Zaporizhzhya, Ukraine. Website-portfolio: https://cookiedev. com/ Full-cycle means that we provide services at every stage of iOS and Android application development process.  We grow our business by helping our customers to grow theirs.  We build iOS apps (iPhone, iPad) and Android apps (phone and tablet) of any complexity or style (material style, flat style):- delivery and ordering systems related applications- logistics mobile applications- marketplace apps- video and chat applications, WebRTC / VoIP, socket connection- booking mobile apps- online TV applications- educational applications- applications for online stores- cleaning services- in-app purchases and in-app subscriptions related apps- iOS apps with iOS specific features- Android material apps with Android specific features- AndroidTV applications- you tell it - we do it iOS skills include but not limited to:- Swift 3 / Objective-C- iOS SDK, xCodeb- Protocols: JSON-RPC, XML, RPC, SOAP, REST. - Integration with existing social networks: Facebook, Twitter, Vkontakte, G+- 2D games: Cocos2D, Cocos2Dx- E-books (static or interactive), Newsstand- Databases: SQLite, CoreData- BLE 4. 0- Mobile advertisement: iAd, AdMob, AppLeads, Flurry, AdWhirl- Other servises and SDKs: Braintree, Liqpay, Yandex. Money, Branch, Maps (OSM, Google, Apple), LinPhone, FrozenMountain, ooVoo, Flurry Analytic, Google Analytics, Crashlytics, Test Flight, other Android:- Java / Kotlin- Encryption: OpenGPG. - Protocols: JSON-RPC, XML-RPC, SOAP, TCP/IP. - simple applications OpenGL ES- Integration with social networks (Facebook, Twitter, Vkontakte, MailRu, Odnoklassniki), Google services (e. g. Youtube, Google Cloud Printing), Payment gateways (Braintree, PayPal, Liqpay, Yandex. Money)- Interaction with external devices (BLE 4. 0/SPP/USB). - Android SQLite- Google Billing, in-apps- VoIP and WebRTC integrations React Native skills:- TypeScript- Node. JS (MERN stack)- JavaScript- ES6+- MongoDB- HTML5, React, CSS- Redux- Material UI Web technologies stack:- React. js,- Angular. JS, Angular 2+- Laravel (PHP framework),- Symfony (PHP framework),- Node. JS,- VueJs- Express. js,- Bootstrap,- Jquery- Integration with social networks (Facebook, Twitter, Vkontakte, MailRu, Odnoklassniki), Google services (e. g. Youtube, Google Cloud Printing), Payment gateways (Braintree, PayPal, Liqpay, Yandex. Money)- Protocols: JSON-RPC, XML-RPC, SOAP, TCP/IP and much much more.  You come to us with an abstract idea and after time we’ll submit a fully functional app to AppStore or Google Play Market. We create Tech Specs documentation, mockups, app designs, development itself, application updates as well as upgrades, along with many other services more or less connected with iOS and Android development.  

XPAY Group LLC – Digital Payment SpaceXPAY Group LLC (XPAY) combines two main business directions:Payment Service Provider (PSP): Facilitates payment processing and provides services to a wide range of participants in the Ukrainian e-commerce market. Fintech Company: Specialises in the development of innovative products and services for the financial market. Our flagship product is a software and hardware solution designed to facilitate electronic money operations. In less than a year and a half, we have grown from a startup to a financial services provider. Since 2018, the company has successfully operated in the B2B segment, maintaining a stable client portfolio. The company holds the status of a "Technological Operator" of payment services, with its operations authorised by the National Bank of Ukraine (Notification of inclusion in the Register of Payment Institutions: No. 27-0018/33703 dated 19. 06. 2018). XPAY adheres to international security standards, including PCI DSS Level 1, version 4. 0.

Link The World To Digital. We are a leading software development company based in Ukraine, specializing in delivering tailored software solutions and top-notch IT consulting services globally. Our expert technical team, headquartered in Kyiv, consists of highly skilled web and mobile developers, inquisitive business analysts, talented UI/UX designers and QA engineers, and dedicated project managers. As a software outsourcing company and web development agency, we thrive on unlocking new opportunities for start-ups and establishment businesses that are looking to drive innovation and growth. Our main values are high-quality work, agile development methodologies, and excellent communication with clients at all stages of work. We assist our clients in achieving digital transformation by serving as a strategic partner, which results in the enhancement of their products, acceleration of service delivery, optimization of operational efficiency, and expansion into new markets. We are rapidly implementing AI and machine learning solutions into our clients' products and evolving as an AI development company. Our services include: Discovery stage (Business analysis) UX/UI design Mobile App Development Web App Development QA and testing DevOps IT consulting Our holistic approach ensures that we address every aspect of your project, from concept to deployment, to provide you with the most effective digital solutions. Proudly recognized as an Upwork Top Rated Agency, we've consistently proven our commitment to delivering excellence and innovation in every project we undertake.

CleverStaff is the software for recruitment with AI assistant, auto-match and gamefication. We have cloud and enterprise (on premise) versions. We build an HR tech ecosystem making integrations with other HR tech platforms and solutions. If you have HR tech product, let's talk!

CallChecker is an AI-powered call analytics platform designed to give businesses complete control over their call-based operations. Whether you’re managing a call center, sales team, or customer support department, CallChecker helps you monitor 100% of your calls, surface valuable insights, and make data-driven decisions that drive growth. We don’t just help teams hear what’s being said — we help them understand what it means. What sets us apart:► Analyze every call (not just a sample) to ensure total visibility► Cut costs by 10x by automating manual quality control processes► Transform agent training and coaching with fast, AI-backed feedback► Ensure rule compliance through AI-enhanced script tracking► Enable faster onboarding and smarter development decisionsWith multilingual support and rapid setup, CallChecker is the go-to solution for teams looking to scale quality, not just volume.

Intellectsoft is a digital transformation consultancy that provides cutting-edge engineering solutions for global organizations with the mission to help enterprises accelerate the adoption of new technologies, untangle complex issues that always emerge during digital evolution, and orchestrate ongoing innovation. Intellectsoft has been named as Top Custom Software Development Company in 2024 by FirmsTalk, Top App Development Company in 2024 by Business of Apps and received over 16 awards in 2024 alone. The Company’s services portfolio offers strategic IT consulting, CX design, development, and full lifecycle management of custom software products and applications, and system integration. Whether it is a consumer-oriented app or a transformative enterprise-class solution, the company leads the process from ideation and concept to delivery and provides ongoing support through its IS360 framework.

We build software that powers global Fintech. ElifTech is a team of ambitious, driven techies that help businesses build functional and stable software products. We create smart solutions connecting people, systems, devices, and data. More than 10 years of software development experience allow us to cover all aspects of the software development lifecycle with ease. 100 highly skilled engineers 10 years in software development 120 implemented projects 100% English-speaking team We use an integrated approach to design, develop, test, and maintain your software. On top of that, we incorporate a secure Software Development Life Cycle approach to meet compliance requirements and ensure a good return on investment. Our Core Services: Engineering Software architecture Web development Mobile development Quality Assurance Test design & strategy Quality audit Web & mobile testing API testing Load & performance testing Design Design strategy Design consulting Experience design UI design Cloud & DevOps Continuous integration & delivery DevOps automation Availability monitoring Performance monitoring Cloud integration Industry & Domain Competency IoT FinTech MarTech Healthcare Logistics eLearning eCommerce Media & Entertainment Big Data & Data Science Cloud Computing 200+ Developers as Global Leaders, Clutch, 2018 Top Internet of Things (IoT) App Development Companies 2018, Mobile App Daily Top 500 Leading B2B Service Provider in Poland and Ukraine, Clutch, 2018 Top Software Development Company in Ukraine, GoodFirms, 2017

We are Linecore. We create custom e-commerce projects that enable you to communicate your strategic vision, strengthen your brand, and win more business. Our clients are industry leaders and rising stars. They know the power of innovations, are experts, and want to work with experts. Through our 20-year history, we have helped over 500 clients and have more than 100 projects in ongoing support. We proudly use industry-leading processes and tools to deliver business value across multiple industries. Contact us today to discuss your project! 

AI & Computer Vision Experts that Turn Ideas to ImpactWe help turn your visual, audio, and text data into actionable knowledge and insights. Leveraging 10+ years of AI development and PhD-level expertise, we create AI solutions that cut costs, automate processes, and drive results - not in theory but in the real world.  Why clients choose us:- 10+ years of expertise in AI, computer vision, and machine learning- 200+ projects delivered across multiple industries- 300+ scientific publications and deep R&D background- PhD-level engineering team with proven expertise What you gain with our solutions:- Efficiency & Safety: minimize downtime, reduce risks, streamline operations- Smarter Decisions: uncover insights, predict outcomes, detect anomalies- Customer Growth: personalize experiences, increase conversions, and retain clients- Cost Optimization: cut waste, save energy, and maximize resources- Innovation at Scale: from prototyping to deployment on cloud, mobile, or edge How we help your industry:- Manufacturing: real-time monitoring to reduce downtime and improve productivity- Construction: AI-driven safety monitoring and progress tracking- Healthcare: faster, more accurate diagnostics and remote patient monitoring- Security & Surveillance: video analytics to detect threats and respond proactively- Retail: personalized recommendations and in-store analytics for higher sales- Real Estate: immersive AR/VR property tours and AI-driven sales acceleration- Entertainment & Media: AI-powered effects, personalization, and interactive content- Sports: performance optimization and fan engagement with predictive video analytics How we work:You get solutions designed around your goals and business context - from prototyping to full-scale deployment with a transparent process, focused on delivering measurable outcomes. With It-Jim, you gain more than a technology provider - you gain a partner dedicated to making AI your competitive advantage.  Let’s explore how AI can create impact for your business - contact us today.