Senior Java Developer (Security Platform)

<section class="job-section" id="st-companyDescription"><div><p class="googlejobs-paragraph--empty"></p><h2 class="title">Company Description</h2></div><div class="wysiwyg spl-wysiwyg"><p>Are you passionate about building secure, high-performance platforms? We are looking for a Senior Java Developer to join our team and work on a cutting-edge security platform. This is a <strong>remote role</strong> open to candidates across Europe and Ukraine.<br> At Sigma Software, we create innovative solutions for complex ecosystems, ensuring security, scalability, and compliance at every step. You will be part of a talented engineering group designing the unified access layer for distributed services.<br> Why join us? You will work on a mission-critical project with advanced security architecture, collaborate with skilled professionals, and contribute to a platform that supports global-scale operations.</p><p><strong>CUSTOMER</strong></p><p>Our customer is a leading EdTech company that uses AI and data-driven technologies to personalize learning experiences, optimize user engagement, and improve marketing effectiveness through advanced audience targeting and analytics.</p><p><strong>PROJECT</strong></p><p>The project focuses on developing a centralized platform access layer that combines API gateway capabilities, service orchestration, data composition, and fine-grained authorization mechanisms. The platform provides a secure foundation for governance across the ecosystem, supporting complex organizational hierarchies, regional compliance requirements, and consistent policy enforcement.</p></div></section><section class="job-section" id="st-jobDescription"><div><p class="googlejobs-paragraph--empty"></p><h2 class="title">Job Description</h2></div><div class="wysiwyg spl-wysiwyg" itemprop="responsibilities"><ul><li>Design and evolve the platform access architecture for a large-scale distributed ecosystem</li><li>Build and maintain a unified API layer over multiple distributed services</li><li>Implement fine-grained ABAC authorization at scale, supporting complex hierarchies and relationships</li><li>Develop fail-closed security architectures with strict enforcement guarantees</li><li>Manage regional compliance, data residency, and routing requirements</li><li>Ensure consistent data visibility rules across all products and services</li><li>Design high-performance authorization evaluation systems and policy engines</li><li>Maintain auditability, traceability, and security transparency mechanisms</li><li>Collaborate with platform and product teams on API and access design</li><li>Contribute to architectural decisions and security standards</li></ul></div></section><section class="job-section" id="st-qualifications"><div><p class="googlejobs-paragraph--empty"></p><h2 class="title">Qualifications</h2></div><div class="wysiwyg spl-wysiwyg" itemprop="qualifications"><ul><li>At least 5+ years of experience building distributed systems</li><li>Strong expertise in Java development</li><li>Experience designing API platforms or API gateways</li><li>Solid background in security architecture and system design</li><li>Experience with authorization systems (RBAC/ABAC or similar)</li><li>Familiarity with cloud-native architectures and scalable, high-availability systems</li><li>Understanding of multi-tenant architectures</li><li>Experience operating complex distributed systems in production</li><li>Strong architectural thinking and problem-solving skills</li><li>Upper-Intermediate or higher English proficiency</li></ul><p><strong>WILL BE A PLUS</strong></p><ul><li>Experience with Identity and Access Management (IAM) systems</li><li>Experience building API gateways or service mesh architectures</li><li>Work on security-critical or compliance-heavy systems</li><li>Knowledge of policy engines (e.g., OPA)</li><li>Experience with large-scale enterprise platforms</li><li>Familiarity with cloud providers (e.g., GCP)</li><li>Experience with data governance, audit, and compliance systems</li><li>Background in regulated or high-security environments</li></ul></div></section><section class="job-section" id="st-additionalInformation"><div><p class="googlejobs-paragraph--empty"></p><h2 class="title">Additional Information</h2></div><div class="wysiwyg spl-wysiwyg" itemprop="incentives"><p><strong>PERSONAL PROFILE</strong></p><ul><li>Proactive and detail-oriented</li><li>Thrives in collaborative environments</li><li>Enjoys solving complex integration challenges</li><li>Comfortable experimenting with new technologies</li><li>Committed to improving data systems</li></ul></div></section>