Junior AI/ML Engineer, Data and Evaluation

We are building a new capability that turns fragmented, noisy security logs into explainable, AI-powered threat analysis, delivered inside the RedMimicry platform. As an AI/ML Engineer at RedMimicry, you will build the datasets, benchmarks, and evaluation infrastructure behind our applied AI/ML work on security telemetry. The quality of this work depends on accurate ground truth, disciplined data handling, reproducible experiments, and systematic error analysis. Your work will determine whether reported improvements are real and whether regressions are caught before deployment. You will work closely with the Senior AI/ML Engineer and Offensive Security Engineer. This role is suitable for an early-career or intermediate engineer with strong programming and data skills who wants to work on applied AI in a technically demanding cybersecurity environment. This is a fixed-term position running until 31 October 2027. Curate Security Datasets: Prepare telemetry from controlled engagements and test environments. Build Ground Truth: Create and maintain labelled examples, annotation guidelines, and consistency checks. Maintain Evaluation Partitions: Separate training, validation, and test data along relevant dimensions. Automate Benchmarks: Implement metrics and maintain reproducible benchmark and regression pipelines that run locally and in CI. Run Experiments and Error Analysis: Evaluate models and methods, and identify recurring failure modes and data-quality issues. Maintain Data Quality: Implement schema checks, provenance tracking, deduplication, validation, and dataset versioning. Document Experiments: Produce clear experiment records, plots, tables, and technical summaries that support engineering decisions. You do not need to meet every requirement to apply. Strong practical work, research projects, open-source contributions, or a relevant thesis can compensate for limited commercial experience. Programming and Data Work Good Python programming skills Experience with Pandas, NumPy, PyTorch, or similar tooling Ability to process structured and unstructured data reliably Familiarity with Git, automated tests, and reproducible development workflows Machine Learning and Evaluation Working understanding of supervised evaluation, train/test separation, and basic statistics Familiarity with language models, embeddings, retrieval, classification, or information extraction Experience with experiment tracking, benchmarking, or regression testing Ability to distinguish statistically meaningful results from anecdotal examples Data Quality and Annotation Careful handling of labels, provenance, edge cases, and ambiguous examples Experience with dataset annotation or benchmark construction is a plus Ability to write clear annotation and evaluation guidelines Cybersecurity Knowledge Security logs, operating-system telemetry, SIEM, EDR, network data, or incident-response experience is a plus Interest in attacker behaviour, detection, and evidence-based security analysis Education Degree in computer science, data science, machine learning, mathematics, cybersecurity, or a related discipline, or equivalent practical experience Languages English (required) German (a plus) Work from anywhere in Germany, and use our Berlin office as often as you like 30 days of paid time off, and a quiet inbox while you are away Company-paid Deutschlandticket Annual budget for the courses and certifications you pick yourself Modern tooling and extensive use of AI Light process, clear communication, focus on what really matters A close match is enough. If the role speaks to you, apply with your CV and anything else you would like us to see. What follows is short and transparent, a few conversations with the team and then your first week in Berlin. We are an equal opportunity employer and welcome applications from all backgrounds and genders. Questions about the role or the process are welcome at any point.