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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer (Python + Ai) - **Company:** Bonapolia - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** LangGraph Framework, ASP.NET, .NET Framework, Artificial Intelligence, Microsoft Azure, Software as a Service, Code Review, Data Validation, Python (Programming Language), SQL Azure, MongoDB, Performance Tuning, Redis, Microsoft Copilot, Software Engineering, Systems Integration, LangChain, Retrieval-Augmented Generation, Large Language Models, Parallel Computation, Generative AI, Agentic-AI, Fastapi, Containerization, Data Lakes, AngularJS, Github Enterprise, Docker, Microservices, Agent2Agent Protocol - **Published:** October 12, 2026 - **Apply:** https://www.buscojobs.com.es/senior-software-engineer-python-ai-en-madrid-ID-374253317 ## About the Role It is a dynamic group combining expertis in tax, software engineering, change management, and project management, working on initiatives from tool design and deployment to training development and engagement management. Project Tech Stack Azure Cloud, Microservices Architecture, . NET 8, ASP.NET Core services, Python, MongoDB, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot, LangGraph, LangChain, RAG Pipelines, Multi-modal LLMs What You'll Do Providing requirements analysis, system design, Python and AI development, troubleshooting, performance optimization, and technical support Designing, developing, and maintaining scalable Python applications using FastAPI and Pydantic Implementing asynchronous and parallel programming solutions with asyncio Conducting thorough code reviews to ensure adherence to established guidelines and maintain high code quality Integrating and experimenting with multi-modal GenAI models (text-to-image, text-to-audio, etc.) Working both independently and collaboratively within the team Providing clear instructions to team members and helping coordinate day-to-day operations Communicating with the client on a regular basis Providing technical leadership for the team - mentor, coach, and lead by example What You Bring 5+ years of background in development Strong background in Python, FastAPI Experience with Pydantic for data validation and schema definition in Python applications Hands-on experience with asyncio, asynchronous/parallel programming Experience with Generative AI and Large Language Models (LLMs) to solve real-world problems and in developing agentic AI applications to enhance AI interaction Understanding of RAG pipelines and hybrid search with vector databases Strong analytical and problem-solving abilities with a detail-oriented mindset Pragmatic approach to balancing process against flexibility in achieving objectives Excellent organizational skills, including the capacity to self-manage, structure work, set priorities, and work to deadlines Excellent troubleshooting and communication skills Nice to have Experience working with Azure Cloud services (or other major cloud platforms), including a range of SaaS offerings such as Service Bus, Data Lake, Blob Storage, Redis,and more Familiarity with agentic protocols such as MCP and A2A is a strong plus Hands-on experience with the LangGraph stack, including long-term memory, human-in-the-loop workflows, and state management, is highly desirable Familiarity with . NET is considered a plus Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes Solid understanding of microservices architecture and its implementation in scalable systems English level Intermediate+ What we offer Model: B2B contract with Bonapolia - one contract, one monthly invoice Rate: negotiated per candidate seniority and client budget ## Description We are looking for a motivated Senior Software Engineer (Python + AI) who is willing to dive into the new project with a modern stack.If you're driven by a curiosity to learn and a desire to produce meaningful results, please apply!About the Client Our client is one of the Big Four accounting firms and the world's largest professional services network.Headquartered in London, they operate in 150+ countries with 460,000+ professionals delivering excellence in audit, tax, consulting, and advisory.The team you will join designs, develops, and deploys innovative enterprise technology and AI-driven tools to support the delivery of tax services.It is a dynamic group combining expertis in tax, software engineering, change management, and project management, working on initiatives from tool design and deployment to training development and engagement management.Project Tech Stack Azure Cloud, Microservices Architecture, .NET 8, ASP.NET Core services, Python, MongoDB, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot, LangGraph, LangChain, RAG Pipelines, Multi-modal LLMs What You'll Do Providing requirements analysis, system design, Python and AI development, troubleshooting, performance optimization, and technical support Designing, developing, and maintaining scalable Python applications using FastAPI and Pydantic Implementing asynchronous and parallel programming solutions with asyncio Conducting thorough code reviews to ensure adherence to established guidelines and maintain high code quality Integrating and experimenting with multi-modal GenAI models (text-to-image, text-to-audio, etc.) Working both independently and collaboratively within the team Providing clear instructions to team members and helping coordinate day-to-day operations Communicating with the client on a regular basis Providing technical leadership for the team - mentor, coach, and lead by example What You Bring 5+ years of background in development Strong background in Python, FastAPI Experience with Pydantic for data validation and schema definition in Python applications Hands-on experience with asyncio, asynchronous/parallel programming Experience with Generative AI and Large Language Models (LLMs) to solve real-world problems and in developing agentic AI applications to enhance AI interaction Understanding of RAG pipelines and hybrid search with vector databases Strong analytical and problem-solving abilities with a detail-oriented mindset Pragmatic approach to balancing process against flexibility in achieving objectives Excellent organizational skills, including the capacity to self-manage, structure work, set priorities, and work to deadlines Excellent troubleshooting and communication skills Nice to have Experience working with Azure Cloud services (or other major cloud platforms), including a range of SaaS offerings such as Service Bus, Data Lake, Blob Storage, Redis,and more Familiarity with agentic protocols such as MCP and A2A is a strong plus Hands-on experience with the LangGraph stack, including long-term memory, human-in-the-loop workflows, and state management, is highly desirable Familiarity with .NET is considered a plus Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes Solid understanding of microservices architecture and its implementation in scalable systems English level Intermediate+ What we offer Model: B2B contract with Bonapolia - one contract, one monthly invoice Rate: negotiated per candidate seniority and client budget