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Our teams work best as single product engineering units, with goals such as growing an MVP towards product-market-fit, scaling technically and product-wise, or acting as R&D teams within larger companies building product MVPs or pivoting. WHY REBBIX TEAMS ARE EFFECTIVEStrong engineering managersTrack record in building successful online marketplaces and travel productsCo-located teamsResults-oriented cultureOUR EXPERTISEEngineering managementSoftware developmentGrowth & SEOProduct designProduct managementSRE & DevOpsData Analytics

You’ve got the strategy. We turn it into working solutions. For 20+ years, Sigma Software has worked with Fortune 500 companies, global vendors and technology start-ups. Our mission is to help innovation leaders move critical initiatives forward by aligning teams, systems, and priorities. With 1,800 engineers in AI, data, cloud, embedded, and cybersecurity, we deliver solutions that scale and last, with ISO-certified quality, security, and compliance embedded from day one. Strategic Initiatives we support:AI Adoption – use AI where it brings tangible value, starting from first pilots and scaling to wider use. Digital Product Innovation – create new software or add digital layers to existing products and services, built with security and compliance in mind. Experience Design – shape journeys across apps and portals so users reach the right outcomes with less friction. Regulatory Compliance – navigating the regulatory landscape complexity and translating standards into working processes for audit-ready operations. Operational Efficiency – replace slow or manual work with modern, automated solutions that cut cost and effort. Managed Services – ensure stability, security, and uptime without draining internal teams. Our work goes beyond solution delivery. Sigma Software Labs works with startups to shape and test new ideas. Sigma Software University not only grows future engineers but also helps our clients build internal capabilities through tailored literacy programs and training. Our R&D teams experiment with emerging technologies early, so when they become relevant, our clients can adopt them faster and with less risk. Together, this cycle of delivery, learning, and exploration makes us better partners and strengthens the outcomes we deliver.

At Velstadt, we empower organisations with cutting-edge cybersecurity services that ensure resilience against evolving cyber threats. Our expertise lies in delivering tailored security strategies in line with international standards such as ISO/IEC 27001, GDPR, NIS2 and others, helping organisations protect their critical information systems and maintain compliance.  Why Velstadt?→ Tailor-made Security Solutions - We adapt our approach to meet your unique business needs. → Innovative Technology - Leveraging the industry-leading tools, including our proprietary Threat Intelligence Platform. → Proven Expertise - Comprehensive hands-on experience securing organisations across all industries. Our Core Services:→ SOC-as-a-Service - 24/7 threat monitoring, incident detection, and automated response. → Penetration Testing - Identifying and mitigating/remediating vulnerabilities before attackers can exploit them. → Threat Intelligence - Delivering real-time insights on emerging threats, APT, IOCs, and IOAs, while our Threat Hunting proactively identifies and remediates hidden threats within the infrastructure before they escalate. → Dark Web Monitoring - Detecting leaks and exposure of sensitive data on hidden dark web platforms, forums, and other sources. → Cloud Security - Robust protection for your cloud infrastructure on AWS, Azure, and GCP. → Vulnerability Management - Detecting and addressing vulnerabilities to maintain a secure environment. → Security Consulting & Virtual CISO - Providing expert guidance to help organisations develop and implement robust cybersecurity strategies, manage incidents, and ensure regulatory compliance. At Velstadt, we don't just mitigate threats - we build security ecosystems that drive long-term resilience. Contact us today for a tailored security strategy that will keep your organisation ahead of cyber risks.

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.

As a web development professional since 2007, I bring a wealth of experience in building and designing high-load systems. I've had the privilege of working on projects for world-class companies, where I've honed my skills in creating scalable, robust solutions. My journey has been one of continuous learning and growth, tackling diverse challenges in web development and delivering exceptional results. Let’s collaborate to bring your project to life with a reliable, experienced approach tailored to your unique needs.

Unibrix provides web and app development services for clients all over the world. We are a team of tech people who know how to utilize the best tech inventions in the world of programming and create the right mix of technologies to create clients’ solutions. Based in Ukraine, our team is accustomed to working with clients from around the world. We’ve been recognized as a trusted partner of the TOP US media streaming platform, which engages with more than 100 mln users daily. Our services are all about code quality and trust.

At Blackbird, we empower startups to thrive. Specializing in Seed and Series A companies, we extend runways by enabling engineering teams to focus on growth-driven features while we take care of everything else. With offices not only in Ukraine but also in Colombia, Spain, and Poland, we bring deep expertise in SaaS, cloud-native products, frontend applications with React, and both native and cross-platform mobile apps—all within a fast-growing tech ecosystem that operates with zero downtime. Want to know how we can help? Reach out! Our team will conduct a comprehensive tech assessment and present tailored options to elevate your startup to the next level.

MK-Consulting is committed to providing end-to-end solutions, from comprehensive business analysis and MVP development to enterprise - scale applications in production and modernizing existing systems. We specialize in the development and support of secure, scalable, highload cloud infrastructure, integrations, data management, as well as machine learning and artificial intelligence solutions tailored for government entities. As a proven GovTech vendor the company successfully implemented a diverse range of national-scale GovTech projects, including:- state electronic procurement (auctions) systems;- procurement data analysis portals;- cloud and on-premise virtual infrastructure for government agencies;- application for management of medicines supplies;- personal electronic certificates of COVID status;- electronic sick leaves system;- citizen registration and electronic services for newborn and their parents;- various registries and related electronic public services. MK-Consulting stands out for its extensive experience in managing large-scale projects nationwide, collaborating with a variety of vendors and stakeholders, including government bodies, NGOs, international organizations, funds and their programs, such as EBRD, The World Bank, Ministry of Digital Transformation. With a team comprising engineers and managers with over 5-20 years of experience, we ensure excellence in design, development, implementation, and support of GovTech solutions. Аs a founding member of the GovTech Association of Ukraine, we hold access to a broad network of partners and technical expertise, enabling us to scale our services effectively and deliver unparalleled support to our clients. Our comprehensive approach focuses on choice of optimal technologies, optimizing resources, reducing costs, and guaranteeing the seamless performance and availability of our solutions.

We provide comprehensive solutions that help you grow your business in the digital environment. From effective software to integration services.

APOM Solutions — IT company customizes and support Software Development Teams and R&D centers in Ukraine. Mainly provides outstaff & outsource services to their clients. We connect clients from all over the world with experienced developers. We create and unite the most powerful international teams.

LITIKO GlobalSet up processes for successWe provide outsourcing services for M-Files, C# products, integration of business appsImplementationIT ConsultingAutomation of business managementTraining and technical support