security engineer in fintech

Capital.com is a financial services company at the forefront of the digital assets movement, developing AI-driven systems that include LLM-based applications, machine learning models, and AI-enabled automation tools.

• Design and implement security controls for AI/ML systems across development, training, and production;
• Secure LLM integrations, RAG pipelines, and AI APIs;
• Conduct threat modeling for AI systems and data pipelines;
• Define secure-by-design patterns for AI-powered features;
• Identify and mitigate AI-specific threats, including prompt injection, jailbreak techniques, model poisoning, data contamination, adversarial attacks, training data leakage, insecure model serialization, and excessive permissions in AI agents;
• Develop guardrails, content filters, and output validation mechanisms;
• Implement monitoring for anomalous AI behavior;
• Integrate AI security checks into CI/CD pipelines;
• Perform security reviews of ML code and AI-related infrastructure;
• Secure model registries and artifact storage;
• Collaborate with engineering and platform teams to enforce security standards;
• Ensure AI systems comply with GDPR, data privacy regulations, and financial industry regulatory requirements;
• Implement controls for sensitive data used in training and inference;
• Perform AI risk assessments aligned with internal risk methodology;
• Contribute to AI security standards and internal policies;
• Define AI risk classification and control frameworks;
• Support security reviews for new AI initiatives and tools.

• 3–5+ Years of experience in software engineering, ML engineering, or application security;
• Hands-on experience with AI/ML systems, including LLMs, NLP models, or similar;
• Python proficiency for automation and scripting;
• Experience working with Claude Code;
• Strong understanding of AWS, Azure, or GCP;
• Experience with API security, Docker, and Kubernetes;
• Knowledge of AI-specific security risks and mitigations;
• Experience conducting threat modeling and risk assessments;
• Strong analytical and problem-solving skills;
• Ability to translate technical risk into business impact;
• Ability to explain AI security risks and mitigations to non-security teams;
• Cross-functional collaboration with ML, data, and product teams;
• Clear documentation and communication skills;
• Nice to have: familiarity with RAG architectures, vector databases, and ML pipelines including MLflow, Kubeflow, or SageMaker; experience in fintech or regulated environments; knowledge of AI governance frameworks including EU AI Act, NIST AI RMF, or ISO/IEC 42001; experience with AI red teaming; cybersecurity or application security background including OWASP and Secure SDLC.

• Competitive salary;
• Annual leave;
• Employee referral program;
• Medical insurance and pension plans;
• Location-specific benefits and perks;
• 30 Extra days to work remotely from anywhere in the world, with some restrictions;
• Two additional paid volunteer days per year.