Senior Java Developer, Security Platform

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Sigma Software Group

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2002

🎮 Gaming

📡 Telecommunications

Software Development • Gaming • Telecommunications

Sigma Software Group is a multinational company, established in 2002, that specializes in providing high-quality software development, graphic design, testing, and support services. The company focuses on delivering solutions across various industries such as automotive, telecommunications, aviation, advertising, gaming, banking, real estate, and healthcare. Sigma Software values professional growth, offers remote work opportunities worldwide, and caters to world-renowned clients like AstraZeneca, Scania, and SAS. The company emphasizes a culture of continuous education, mentorship, and flexible work environments, making it a preferred workplace for IT specialists aiming to work on complex solutions utilizing cutting-edge technologies. Sigma Software is committed to innovative solutions and engineering the future while also contributing to social causes such as charitable work in Ukraine.

📋 Description

• Design and evolve the platform access architecture for a large-scale distributed ecosystem • Build and maintain a unified API layer over multiple distributed services • Implement fine-grained ABAC authorization at scale, supporting complex hierarchies and relationships • Develop fail-closed security architectures with strict enforcement guarantees • Manage regional compliance, data residency, and routing requirements • Ensure consistent data visibility rules across all products and services • Design high-performance authorization evaluation systems and policy engines • Maintain auditability, traceability, and security transparency mechanisms • Collaborate with platform and product teams on API and access design • Contribute to architectural decisions and security standards

🎯 Requirements

• At least 5+ years of experience building distributed systems • Strong expertise in Java development • Experience designing API platforms or API gateways • Solid background in security architecture and system design • Experience with authorization systems (RBAC/ABAC or similar) • Familiarity with cloud-native architectures and scalable, high-availability systems • Understanding of multi-tenant architectures • Experience operating complex distributed systems in production • Strong architectural thinking and problem-solving skills • Upper-Intermediate or higher English proficiency • Experience with Identity and Access Management (IAM) systems will be a plus • Experience building API gateways or service mesh architectures will be a plus • Work on security-critical or compliance-heavy systems will be a plus • Knowledge of policy engines (e.g., OPA) will be a plus • Experience with large-scale enterprise platforms will be a plus • Familiarity with cloud providers (e.g., GCP) will be a plus • Experience with data governance, audit, and compliance systems will be a plus • Background in regulated or high-security environments will be a plus.