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Senior Python Developer - AI @ 83zero Ltd

Southwark Bridge Road 2a, LondonOnsiteFull-time
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Salary: £60,000 - 70,000 per year

Requirements: Senior-level hands-on Python development experienceStrong commercial experience building APIs, microservices and backend applicationsPractical experience with Generative AI, LLMs and RAGExperience with AI frameworks such as LangChain, LangGraph or CrewAIExperience with vector databases and semantic searchExperience with OpenAI, Anthropic, Mistral, Llama or similar modelsStrong software engineering, testing and Git practicesExperience with AWS or Azure, Docker and ideally KubernetesExperience with PostgreSQL, MongoDB or similar databasesExperience with CI/CD using GitHub, GitLab or JenkinsAgile engineering experienceProven leadership and mentoring experience required for Senior Consultant levelExperience with AI agents, tool calling, embeddings, prompt engineering or LLM observability is beneficialReact/TypeScript and Terraform/IaC experience is beneficialExperience taking GenAI POCs into production is highly beneficial Responsibilities: Build production applications and APIs using Python and FastAPIDevelop LLM, RAG and AI agent solutionsBuild RAG pipelines covering embeddings, retrieval and generationWork with OpenAI, Anthropic, Mistral, Llama and similar LLMsUse LangChain, LangGraph, CrewAI or similar AI frameworksWork with vector databases including Pinecone, Qdrant, ChromaDB and PGVectorTake GenAI POCs into production and scale themBuild APIs, microservices and AI integrationsDeploy solutions using AWS/Azure, Docker and KubernetesWrite clean, testable and maintainable Python codeWork with PostgreSQL, MongoDB, Git and CI/CDCollaborate with engineers, architects and client stakeholders Technologies: AIAI AgentsAWSAzureBackendCI/CDDockerFastAPIGitGitHubGitLabJenkinsKubernetesLLMMongoDBPostgreSQLPythonRAGReactTerraformTypeScriptmicroservicesCloud More:

We are hiring Senior Python Developers for a permanent hybrid role based in London, Bristol, Manchester, Glasgow or Newcastle, with two days per week onsite and occasional travel to client sites. We offer a salary of £60,000 to £70,000 plus benefits, perks and healthcare options. This is a coding-focused opportunity to work on real-world AI engineering projects, building production-ready Generative AI applications for enterprise clients and developing your experience across both software engineering and modern GenAI technologies.

last updated 39 week of 2026

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