We are looking for a Senior Java Engineer to join the Atlas & Authorization Platform project full-time. We are building a platform access and security layer that sits in front of all core services and serves as the unified entry point for data and service access across the ecosystem, alongside a fine-grained Attribute-Based Access Control (ABAC) system.
Your responsibilities will include: * Design and evolve the platform access architecture * Build and maintain a unified API layer over multiple distributed services * Design and implement fine-grained authorization at scale (ABAC model) * Support complex organizational hierarchies and access relationships * Build fail-closed security architectures with strict enforcement guarantees * Manage regional compliance and data residency requirements * Enforce consistent data visibility rules across all products and services * Design high-performance authorization evaluation systems * Provide full auditability, traceability, and security transparency * Develop and maintain a unified API composition layer across services * Design and implement policy evaluation architecture for access control decisions * Ensure tenant isolation and enforce strict data boundaries * Implement regional routing and compliance-aware data access * Build scalable and high-performance authorization systems * Ensure consistent enforcement of security and governance rules across the ecosystem * Design and maintain auditability and traceability mechanisms * Collaborate with platform and product teams on API and access design * Contribute to architectural decisions and security standards across the organization
What we expect from you: * At least 5 years of experience building distributed systems * Strong expertise in Java development * Experience designing API platforms or API gateways * Strong background in security architecture and system design * Experience with authorization systems (RBAC/ABAC or similar models) * Experience with cloud-native architectures * Experience designing scalable, high-availability systems * Strong understanding of multi-tenant architectures * Experience working with complex distributed systems in production * Strong architectural thinking and problem-solving skills * Upper-Intermediate+ English level
Will be a plus: * Experience with Identity and Access Management (IAM) systems * Experience building API gateways or service mesh architectures * Experience with security-critical or compliance-heavy systems * Experience with policy engines (e.g., OPA or similar concepts) * Experience with large-scale enterprise platforms * Experience with cloud providers (e.g., GCP) * Experience with data governance, audit, and compliance systems * Experience in regulated or high-security environments
What We Offer: * Work at a Top-employer company (according to DOU 2025) * A strong culture built on empathy, trust, openness, and real care for employees * Competitive compensation with regular reviews * Medical insurance * Personal learning budget and access to top HR tools, platforms, and practices * Team events and regular team-building activities * Flexible hybrid work model with an office in central Kyiv
