Senior Full-Stack Developer (Backend-Oriented)

5Blue Software

4d • Remote

About The Position

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 replace slow, manual processes with a continuously up-to-date, audit-ready experience. It serves startups, scale-ups, and enterprises, and is recognized by its customers and partners for both technology and a partnership-driven approach. 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 backend development in Node.js (C#, Java, or C++ experience also relevant), plus solid working experience with React.
• Proven production experience with microservices architecture.
• Strong skills with both relational and non-relational databases, including data modeling and query optimization.
• Solid experience designing, building, and integrating REST APIs.
• Familiarity with AWS or a similar cloud provider.
• Ability to own a module or technical project end to end and drive it independently.
• Strong software design fundamentals (principles, patterns) and a self-driven approach to problem-solving.
• English — Upper-Intermediate level and above, with strong verbal and written communication.

Nice To Haves

• Knowledge of containerization tools (Docker, Kubernetes) is a strong advantage.
• Experience developing high-scale SaaS solutions.
• Deep 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

• Design and build scalable backend services using microservices and containerized solutions on AWS.
• Participate in architectural decisions, research, and design to deliver robust, maintainable software.
• Model data and build/integrate REST APIs with third-party systems; contribute to frontend where needed.
• Work directly with Product and stakeholders to shape requirements and translate them into well-scoped tasks.
• Mentor teammates, promote knowledge sharing, and uphold coding standards.
• Continuously improve platform performance, scalability, and maintainability while keeping up with industry trends.

Benefits

• Opportunity to work remotely.
• Individual English language training to enhance your communication skills.
• Comprehensive health insurance to ensure your well-being.
• Work with a supportive, collaborative, and dynamic international team.
• All necessary equipment supplied for efficient job performance.
• Full accounting assistance in Ukraine and Poland.
• 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed