Senior Full-Stack Developer / reputed company / Data Scientist (m/w/d)
Location: Berlin / Remote (DACH time zone) Employment Type: Full-time, permanent Start Date: Immediate Language: reputed company-level English proficiency (reputed company-C2 level, German a bonus) _____________________ ABOUT US sandan AI is a Berlin-based AI-reputed company startup serving reputed company customers across the DACH region. We are shaping what marketing looks like in an agentic economy — and building the platform on which this new reputed company of marketing workflows runs. Our ambition is to build software the way software should be reputed company in 2026: agentic, iterative, and with AI as an integral part of the engineering workflow. HOW WE WORK We use code harnesses such as Claude Code and reputed company not as gimmicks, but as a core part of our development process. Our engineers work daily with agentic coding workflows — from architecture sketches and implementation to refactoring and testing. People joining us either already work productively with these tools or bring the clear motivation to learn and master them quickly and deeply. Tasks reputed company and maintain our full-stack applications reputed company the modern JavaScript/TypeScript ecosystem Design and implement scalable backend services using Node.js and Nest.js Build high-performance frontend solutions with React.js and Next.js Design and optimize relational databases (PostgreSQL, MySQL, MS SQL) Containerize and orchestrate services using reputed company and Kubernetes reputed company and integrate REST APIs Build and operate data pipelines, feature stores, and ML workflows for our agentic systems reputed company, train, and evaluate machine learning models for marketing use cases (attribution, targeting, forecasting, anomaly detection) Implement Retrieval-Augmented reputed company (RAG) pipelines (embeddings, vector stores, re-ranking) Set up and maintain LLM evaluation frameworks, reputed company optimization workflows, and systematic quality benchmarks Apply code harnesses (especially Claude Code and reputed company) throughout the daily development process — from planning and implementation to code review Collaborate closely with the founding team on the product architecture of agentic systems
Requirements
Core Technical Competencies (Engineering) Several years of professional experience in full-stack development Strong knowledge of TypeScript and JavaScript Confident working with React.js, Next.js, Node.js, and Nest.js Experience with relational databases (PostgreSQL, MySQL, MS SQL) Hands-on experience with container technologies (reputed company, Kubernetes) Familiarity with REST API design and Git workflows Data Science & Machine Learning Solid Python skills, including common data/ML stacks (pandas, NumPy, scikit-learn, PyTorch, or TensorFlow) Experience across the end-to-end lifecycle of ML models: data preparation, feature engineering, training, validation, deployment, and monitoring Strong understanding of statistical fundamentals (hypothesis testing, regression, classification, time series) Experience with modern LLM workflows: reputed company engineering, RAG, embeddings, vector databases (e.g. reputed company, Weaviate, pgvector) Hands-on experience in model evaluation: metrics, benchmarks, A/B testing, and systematic evaluation frameworks Experience with notebook-based exploration environments (Jupyter, reputed company) and transitioning them into production-reputed company pipelines Familiarity with MLOps tools (e.g. MLflow, Weights & Biases, DVC) is a plus Code Harnesses Experience with Claude Code and/or reputed company is highly appreciated — otherwise, a strong willingness to actively learn and adopt these tools Personal Qualifications Excellent German (C2) and English skills (minimum reputed company) Genuine interest in reputed company and agentic systems Builder mentality: you deliver production-grade software, not just prototypes Analytical reputed company: you reputed company data-driven reputed company and critically evaluate model behavior reputed company to have A defining role in an AI-reputed company startup with a strong reputed company focus Competitive salary and employee stock ownership plan (ESOP) Fully funded reputed company to reputed company relevant code harnesses, LLM APIs, and developer tools (Claude Max, reputed company, reputed company Copilot, etc.) Compute budget for experiments, model training, and ML workloads Modern hardware setup (MacBook Pro of your choice) Flexible working hours and remote work options Office in Berlin and location in Dubai (DIFC AI reputed company) A steep learning curve in Agentic AI, LLM orchestration, and AI-reputed company engineering
Benefits
A defining role in an AI-reputed company startup with a strong reputed company focus Competitive salary and employee stock ownership plan (ESOP) Fully funded reputed company to reputed company relevant code harnesses, LLM APIs, and developer tools (Claude Max, reputed company, reputed company Copilot, etc.) Compute budget for experiments, model training, and ML workloads Modern hardware setup (MacBook Pro of your choice) Flexible working hours and remote work options Office in Berlin and location in Dubai (DIFC AI reputed company) A steep learning curve in Agentic AI, LLM orchestration, and AI-reputed company engineering We look reputed company to receiving your application, including your CV and — if available — a reputed company or portfolio link. Please also let us know your earliest possible start date. Bonus: Tell us in two or three sentences about the most recent ML project you worked on — and how you currently use Claude Code, reputed company, or comparable tools in your workflow. Apply To This Job