Senior Backend Developer (Developer Platform)

Quick Facts

• Role: Senior Backend Developer (Developer Platform)
• Work model: Hybrid (up to 3 days remote/week)
• Location: Kraków

Description

Design, develop, and maintain backend services and platform components for an internal developer platform that enables enterprise-scale delivery and hosting. Work with senior leadership and engineering teams to define platform strategy, contribute to architecture decisions, and set platform standards. Ensure high-quality engineering through code reviews, testing, documentation, and a strong focus on security, performance, and maintainability.

Responsibilities

• Design, develop, and maintain backend services and platform components
• Collaborate with senior management and large developer teams to define platform strategy and drive delivery
• Contribute to architectural decisions and establish platform standards for enterprise needs
• Engage stakeholders to gather requirements and communicate technical progress
• Work across multiple languages and technical domains using best practices in development and DevOps
• Participate in code reviews, testing, and documentation
• Focus on security, performance, and maintainability

Requirements

• 5+ years of professional backend development experience in enterprise or platform environments
• Strong proficiency in Java, Kotlin, or Node.js (at least one)
• Excellent communication skills with senior management and large developer communities
• Self-driven attitude and ability to work independently in a hybrid setting
• Familiarity with building or working on developer platforms or internal tooling (advantage)
• Experience working in internationally distributed teams
• Fluent English
• Existing legal right to work in the European Union

Benefits

• Hybrid work model (up to 3 days remote/week)
• Long-term, multi-year project building an enterprise-grade developer platform