Senior Full-Stack Developer (Backend-Focused)

5Bsoftware β€” Poland Β· Posted ~2 hours ago

Senior Full-time

Skills

Node.js backend development full-stack development cloud platforms software architecture API development C# Java C++ cloud AI

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Summary ✨ AI‑Generated

A growing technology organization is seeking an experienced full-stack engineer to build and improve a cloud-based platform. The role involves designing scalable solutions, developing new features, optimizing performance, and contributing to engineering excellence across the stack.

Highlights

Opportunity to build impactful cloud software, work on AI-driven automation solutions, influence architecture decisions, and contribute within a collaborative engineering environment.

Description

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 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. 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 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 β€” Upper-Intermediate level and above, with strong verbal and written communication. Knowledge of containerization tools (Docker, Kubernetes) is a strong advantage. Nice to have: Experience developing high-scale SaaS solutions. Deep understanding of CI/CD and QA automation processes. Maturity with AI-assisted development β€” 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. What we offer: β€” Flexible Work Environment: Opportunity to work remotely. β€” 1:1 English Classes: Individual English language training to enhance your communication skills. β€” Premium Medical Insurance: Comprehensive health insurance to ensure your well-being. β€” Great Team: Work with a supportive, collaborative, and dynamic international team. β€” Equipment Provided: All necessary equipment supplied for efficient job performance. β€” Accounting Support: Full accounting assistance in Ukraine and Poland. β€” Paid Time Off: 18 days of Annual Vacation and 7 days of Sick Leave without a doctor's note. β€” 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!