Senior AI Backend Engineer (Go & Python)

Senior AI Backend Engineer (Go & Python)Location: 100% Remote - Candidates must be located in PolandContract: B2BStart Date: 30 Days / Within 1 Month / FlexibleWe are looking for a Senior AI Backend Engineer to design and build scalable AI-powered platforms, focusing on multi-agent systems, advanced RAG architectures, and high-performance backend services.Your ResponsibilitiesDesign and implement stateful multi-agent workflows and autonomous tool-calling systems.Build and optimize Advanced RAG pipelines, including data ingestion, semantic chunking, vector database integrations, and reranking mechanisms.Develop high-performance backend services with a focus on scalability, low latency, and concurrency.Create clean, strongly typed, and extensible APIs supporting both web and CLI applications.Improve reliability through resilient error handling, monitoring, and recovery strategies.Collaborate with AI and platform teams to deliver production-ready GenAI solutions.Requirements5+ years of experience in backend software engineering.Expert knowledge of Go (Golang).Strong hands-on experience with Python, particularly within AI and Machine Learning ecosystems.Experience building AI applications using:Agentic frameworks and AI orchestrationRAG architecturesVector databasesToken streamingMemory managementStrong understanding of:Asynchronous processingEvent-driven architecturesState machinesStreaming protocolsDistributed systemsExperience designing and building scalable APIs and backend platforms.Nice to HaveExperience with LLM platforms and AI agents.Knowledge of modern AI frameworks and orchestration tools.Experience optimizing backend systems for heavy AI workloads.Familiarity with cloud-native environments and platform engineering practices.What We OfferB2B contract via ExperisMedicover healthcare packageMultisport cardGroup life insuranceFully remote work modelLong-term cooperationOpportunity to work on cutting-edge AI, Agentic AI, and RAG-based solutions in an international environment.