We are looking for a Senior Python Engineer to play a key role in building the core of our AI platform. Implement and optimize knowledge retrieval systems and agentic search capabilities using vector databases such as Qdrant and ElasticSearch Write well‑structured, efficient, and testable Python code for production services, experimentation, and internal developer tools Build and maintain shared Python libraries and SDKs used across multiple applications and microservices Drive the full software development lifecycle - from design and implementation to deployment, monitoring, and continuous improvement Identify and resolve performance bottlenecks, reliability issues, and scaling challenges in complex, data‑intensive environments Example Projects: Building an evaluation and observability framework for AI model performance and reliability Designing AI services that process and reason over high‑volume real‑world data at scale Benefits Adaptable Working Arrangements: Professional Development Opportunities: We are invested in the long‑term professional development of our people, beyond what they bring to the table on their first day at work. We support individual career ambitions, and set aside training programs and budgets they can tap on to upgrade both soft and hard skills. ~ Dedicated Wellness & Recreation Time: We make it a point to dedicate time to pause, recharge and get to know each other better.

From virtual game nights to fitness sessions, there’s always time for a little fun on the calendars. Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field,



or equivalent practical experience5+ years of experience as a Software Engineer, with strong proficiency in PythonProven track record of building and maintaining production-grade systems using PythonStrong understanding of distributed systems, API design, and data-driven architecturesExperience with relational and non-relational databases (PostgreSQL, Elastic, Qdrant, or similar)Familiarity with AI/ML system design, including LLM integration and evaluation pipelinesKnowledge of DevOps and observability practices (CI/CD, monitoring, metrics, and model validation)PostgreSQLLiteLLMElasticSearchQdrantArgoCDLLM APIs (OpenAI, Anthropic, Qwen, OSS)KubernetesPythonFastAPIGitHub ActionsLangfuseExperience working with multiple LLM providers (OpenAI, Anthropic, Qwen, open-source models)Background in developer platforms or AI infrastructure servicesFamiliarity with vector databases, semantic retrieval, and knowledge graph architecturesExposure to Langfuse, LiteLLM, LangChain, or similar frameworksExperience developing enterprise-scale SaaS or distributed backend systemsContributions to open-source projects in Python, AI, or infrastructure engineeringExcellent communication skills, with the ability to convey complex technical ideas clearly to both technical and non-technical audiencesCollaborative and proactive approach, comfortable working across teams in a dynamic environmentStrong analytical and problem-solving abilities, with a focus on continuous improvement and innovationCuriosity and a genuine interest in emerging AI technologies and modern backend architectures #

📌 Senior Software Engineer - C# - (Hybrid Remote) (Madrid)
🏢 Workato
📍 Madrid