
Senior Full-Stack Developer (Frontend-Oriented)
5Blue Software · Kyiv, Kyiv City, Ukraine
About this role
The candidate will join a core R&D team building an AI-powered B2B SaaS platform for security, risk, and compliance automation. Responsibilities include building intuitive React frontends, implementing backend logic, and integrating third-party APIs. The developer will participate in architectural decisions and work closely with Product and stakeholders to shape requirements. The technical environment involves React, Node.js, AWS, and microservices architecture. The role also involves mentoring teammates and promoting high coding standards within a dynamic international team.
Skills & technologies
Must have
- React
- Node.js
- REST API
- Relational Databases
- Non-relational Databases
- AWS
- Microservices
- Docker
- Kubernetes
Nice to have
- SaaS
- UX
- CI/CD
- QA Automation
- AI-assisted development
Read full description
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.
- 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.
- 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.
— 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!