Senior Full-Stack Developer (Frontend-Oriented)

About the project: Join a fast-growing product company building an AI-powered B2B SaaS platform that helps organizations worldwide automate security, risk, and compliance workflows. The platform combines intelligent automation, real-time monitoring, and AI-driven insights to turn slow, manual processes into a smooth, continuously audit-ready experience. It serves startups, scale-ups, and enterprises, and is known for both its technology and a strong partnership-driven approach. Role overview: We're seeking a hands-on Full-Stack Developer to join our core R&D team and help build our cloud-based platform. You'll work across the stack, shaping the architecture, implementing new features, optimizing performance, and mentoring team members to uphold high standards. This is your opportunity to make a significant impact on a platform automating IT auditing for SaaS companies globally. Requirements: 5+ years of frontend development with React, plus solid backend experience in Node.js (C#, Java, or C++ also relevant). Strong command of modern frontend fundamentals — component architecture, state management, performance, and responsive UI. Experience building and integrating REST APIs. Working knowledge of relational and non-relational databases. Familiarity with AWS or a similar cloud provider; understanding of microservices architecture. Ability to own a feature or technical project end to end and drive it independently. Strong software design fundamentals and a self-driven approach to problem-solving. English — Upper-Intermediate level and above, with strong verbal and written communication. Knowledge of containerization tools (Docker, Kubernetes) is an advantage. Nice to have: Experience developing high-scale SaaS products with polished, complex UIs. Eye for UX and close collaboration with Product and design. Understanding of CI/CD and QA automation processes. Maturity with AI-assisted development — able to review and understand generated code rather than relying on it blindly. Academic background in Computer Science, Software Engineering, or a related field. Responsibilities: Build intuitive, performant frontends in React and shape the platform's UI/UX architecture. Implement backend logic and integrate with third-party APIs as part of full-stack feature delivery. Participate in architectural decisions, research, and design for scalable, maintainable software. Work directly with Product and stakeholders to shape requirements and break them into well-scoped tasks. Mentor teammates, promote knowledge sharing, and uphold coding standards. Continuously improve UI performance, scalability, and maintainability while keeping up with industry trends. What we offer: — Flexible Work Environment: Opportunity to work remotely. — 1:1 English Classes : Individual English language training to enhance your communication skills. — Premium Medical Insurance : Comprehensive health insurance to ensure your well-being. — Great Team: Work with a supportive, collaborative, and dynamic international team. — Equipment Provided : All necessary equipment supplied for efficient job performance. — Accounting Support: Full accounting assistance in Ukraine and Poland. — Paid Time Off: 18 days of Annual Vacation and 7 days of Sick Leave without a doctor's note. — Flexible payment system , which allows you to withdraw funds in one click and has about twenty withdrawal options. Does this position sound like a perfect match? We’re eager to hear from you!