Principal Full Stack Engineer
Azure AI Search & Elasticsearch 6-month contract Outside IR35 London- 2 days onsite
We are looking for a Principal Full Stack Engineer to lead the design and delivery of enterprise search and AI-driven applications. This is a senior, hands-on contract combining search architecture, full-stack development, Microsoft Azure, DevOps and Generative AI.
Key responsibilities
Design and optimise enterprise search solutions using Elasticsearch and Azure AI Search. Define Elasticsearch cluster architecture, index mappings, aggregation queries and lifecycle strategies. Improve search relevance, indexing performance, query latency and platform resilience. Build Azure AI Search solutions using indexers, custom skillsets, vector search and semantic ranking. Develop responsive, search-focused applications using JavaScript/TypeScript and React, Angular or Vue. Design and integrate APIs and backend services across the Azure ecosystem. Build enterprise RAG and GenAI solutions using technologies such as LangChain or LlamaIndex. Deploy applications using Docker, Kubernetes and AKS. Implement CI/CD pipelines through Azure DevOps or GitHub Actions. Deliver infrastructure using Terraform or Bicep. Provide technical leadership, architectural guidance and engineering best practices. Essential experience
At least 10 years of software engineering or solution architecture experience. Deep, hands-on Elasticsearch expertise covering cluster architecture, mappings, aggregations, Lucene internals, performance tuning and snapshot/restore. Extensive production experience with Azure AI Search, including indexers, custom skillsets, vector search and semantic rankers. Strong JavaScript/TypeScript development skills using React, Angular or Vue. Experience with Azure Web Apps, Functions, Event Grid, Key Vault, API Management and Private Endpoints. Strong Docker, Kubernetes/AKS and CI/CD experience. Infrastructure-as-Code experience using Terraform or Bicep. Practical experience delivering enterprise GenAI and RAG solutions using LangChain or LlamaIndex. Strong communication skills and the ability to influence architectural decisions at principal level. Relevant Microsoft Azure or Elastic certifications would be advantageous. TPBN1_UKTJ
Full Stack Engineer in Slough employer: Xcede
As a Mobility Engineer/Consultant with us, you'll thrive in a dynamic remote work environment that champions innovation and collaboration. We offer competitive benefits, a strong focus on employee development, and the opportunity to work on cutting-edge enterprise solutions that make a real impact. Join our team and be part of a culture that values your expertise and encourages professional growth while ensuring you have the tools and support needed to excel in your role.
