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Senior Software Engineer (Security experience) at Complexio. Complexio's Foundational AI works to automate business activities by ingesting whole company data – both structured and unstructured – and making sense of it. Using proprietary models and algorithms Complexio forms a deep understanding of how humans are interacting and using it. Automation can then replicate and improve these actions independently.. Complexio is a joint venture between Hafnia and Símbolo, in partnership with Marfin Management, C Transport Maritime, Trans Sea Transport and BW Epic Kosan.. We're seeking an exceptional security developer to join our efforts in implementing a sophisticated privacy-preserving access control framework across our autonomous business process automation platform.. You will need strong Python development experience as you will be building a custom encryption service within a micro-services architecture. The scope covers secure service development, OAuth integrations, and identity provider connections.. Key Responsibilities. . . Design and implement.  a comprehensive data privacy and access control architecture that addresses multi-dimensional classification, dynamic permissions, and information barriers. . Focus on privacy-preserving access controls and coordinate with cross-functional teams including data ingestion, knowledge mapping, and automation developers. . . Develop and enforce.  security and privacy standards, policies, and best practices throughout the product development lifecycle. . Technical Implementation. . . Architect.  a multi-layered access control model combining Role-Based Access Control (RBAC), Attribute-Based Access Control (ABAC), and purpose-based limitations. . . Oversee implementation.  of fine-grained data classification frameworks using NLP and other technologies. . . Design and validate.  permission propagation mechanisms for graph data models and derived insights. . . Establish security boundaries.  for autonomous AI agents, ensuring proper context isolation and privilege controls. . Cross-Team Coordination. . . Work closely.  with engineering teams to integrate privacy controls into the data pipeline, knowledge graph, and AI components. . . Collaborate.  with product management to balance privacy requirements with usability and functionality. . . Coordinate.  with customer success to address client-specific privacy and compliance needs. . . Influence and guide.  development teams to prioritize privacy-by-design principles. . . . 5+ years of experience.  in information security, data privacy, or access control systems. . . Proven track record.  designing and implementing complex security architectures. . . Strong knowledge.  of modern authorization frameworks, RBAC/ABAC systems, and data classification methodologies. . . Experience leading teams.  and influencing cross-functional stakeholders. . . Technical background.  with understanding of databases, APIs, and enterprise software architecture. . Preferred Skills & Experience. . . Knowledge of AI/ML systems.  and the unique privacy challenges they present. . . Understanding.  of data privacy regulations (GDPR, CCPA) and their technical implementation requirements. . . Familiarity with LLMs.  and the privacy implications of their use in enterprise contexts. . . Understanding of vector databases.  and embedding-based systems. . . Experience in regulated industries.  (finance, healthcare, legal) with complex information barrier requirements. . . Background in data lineage.  and provenance tracking systems. . . Experience with graph databases.  (particularly Neo4j) and their security models. . . Security certifications.  such as CISSP, CIPT, or CIPP/E. . Core Development Skills. . Experience building encryption systems (e.g. using AES, RSA, and key management services). . Hands-on development with OAuth 2.0, OpenID Connect, JWT validation, and RBAC/ABAC systems. . Building secure REST/GraphQL APIs with middleware for authentication, rate limiting, and input validation. . Implementing access controls, query filtering, and audit logging for SQL and NoSQL databases. . Securing pub/sub systems with encryption, authentication, and access controls. Required Technologies. . . Python. (async/await, cryptography libraries, FastAPI). . . Container security. (Docker, Kubernetes secrets, network policies). . . Identity providers. (Microsoft EntraID, Okta, Auth0 integration). . . Database systems. (PostgreSQL, Redis, experience with graph databases preferred). . . Cloud security. (AWS/Azure IAM, KMS, security groups). . Practical Experience. . Built production encryption/decryption systems handling sensitive data at scale. . Implemented fine-grained permission systems beyond simple role-based access. . Developed secure multi-tenant applications with data isolation between customers. . Created audit logging and compliance reporting for regulated environments. . Integrated with enterprise identity systems in complex organizational structures. . Company Location: United Kingdom.