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Senior AI Platform Engineer (LLM & Agentic Systems)

Role overview

Qualifications

  • 4+ years of professional software engineering experience.
  • 2+ years building production AI or LLM-powered applications.
  • Strong Python development skills with experience building scalable backend services.
  • Hands-on experience with FastAPI or similar asynchronous web frameworks.

Responsibilities

  • Build Intelligent Agent Systems.
  • Develop Advanced RAG Solutions.
  • Deliver Reliable AI Outputs.
  • Engineer Production-Ready Platforms.

About the company

Techifide Ltd logo

Techifide Ltd

Techifide is a leading UK-based company that specialises in providing professional IT recruitment services utilising offshore talent from Latin America, USA and Europe.

Company details

Company size2 - 10

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Job description

About the Opportunity

We are partnering with an innovative technology company that is building next-generation AI solutions designed to transform complex, unstructured information into actionable business intelligence.

This is an opportunity to join a highly technical team focused on delivering production-grade AI systems that combine large language models, intelligent agents, knowledge retrieval, and enterprise software engineering.

We are looking for a Senior AI Platform Engineer who enjoys solving complex engineering challenges and building reliable AI-powered applications that users depend on every day.

The Role

As a Senior AI Platform Engineer, you will take ownership of the architecture and development of advanced AI services, including agent orchestration, retrieval-augmented generation (RAG), tool integration frameworks, and structured reasoning systems.

This is a hands-on engineering role rather than a research position. Success requires strong expertise in both modern AI application development and backend software engineering.

You will help design systems that are scalable, observable, cost-efficient, and robust enough for enterprise production environments.

What You'll Be Doing

Build Intelligent Agent Systems

  • Design and implement multi-agent architectures capable of planning, execution, validation, and human-assisted decision-making.
  • Develop complex workflows using LangGraph, LangChain, or custom orchestration frameworks.
  • Create reliable tool-calling infrastructures that connect AI agents to external services and business systems.
  • Develop memory and context-management strategies for long-running agent interactions.

Develop Advanced RAG Solutions

  • Design and optimize retrieval-augmented generation pipelines.
  • Work with vector databases and embedding technologies to improve knowledge retrieval performance.
  • Implement advanced retrieval techniques including hybrid search, reranking, query decomposition, and citation-based grounding.
  • Build scalable ingestion and indexing pipelines for large knowledge repositories.

Deliver Reliable AI Outputs

  • Design systems that combine deterministic software logic with LLM-powered reasoning.
  • Implement robust validation frameworks using Pydantic, JSON Schema, and structured output patterns.
  • Create safeguards and quality controls that ensure consistent, production-ready outputs.

Drive AI Quality & Performance

  • Develop testing and evaluation frameworks for AI-powered applications.
  • Monitor quality, latency, cost, and user experience metrics.
  • Build benchmarking, regression testing, and A/B testing capabilities.
  • Optimize prompts, model selection strategies, caching, and token consumption.

Engineer Production-Ready Platforms

  • Build and maintain APIs using FastAPI and modern Python frameworks.
  • Implement real-time and streaming AI experiences.
  • Work with PostgreSQL, Redis, Elasticsearch, and vector databases.
  • Collaborate on containerized deployments using Docker and Kubernetes.
  • Support the full software lifecycle from architecture through production operations.

What We're Looking For

Essential Skills & Experience

  • 4+ years of professional software engineering experience.
  • 2+ years building production AI or LLM-powered applications.
  • Strong Python development skills with experience building scalable backend services.
  • Hands-on experience with FastAPI or similar asynchronous web frameworks.
  • Proven expertise in agentic AI frameworks such as LangGraph, LangChain, or custom orchestration systems.
  • Experience designing and deploying RAG architectures.
  • Deep understanding of prompt engineering, structured outputs, model selection, and LLM optimisation.
  • Strong experience with Pydantic and schema-driven development.
  • Solid database knowledge, including PostgreSQL and Redis.
  • Experience working with vector databases such as Qdrant, Pinecone, Weaviate, FAISS, or pgvector.
  • Experience building automated testing, monitoring, and evaluation systems for AI applications.
  • Strong understanding of API design, WebSockets, and distributed systems.
  • Excellent debugging and problem-solving skills.

Nice to Have

  • Experience with Model Context Protocol (MCP).
  • Knowledge of fine-tuning techniques such as LoRA or QLoRA.
  • Experience building multi-tenant SaaS platforms.
  • Familiarity with AI observability tools such as LangSmith or Langfuse.
  • Experience implementing hybrid search solutions using Elasticsearch.
  • Cloud platform experience, particularly AWS.
  • Contributions to open-source AI projects or published technical work.
  • Experience working on enterprise AI platforms or knowledge management systems.

Why This Opportunity?

  • Work on cutting-edge agentic AI systems solving real business problems.
  • Build production AI applications rather than experimental prototypes.
  • Influence architecture and technical direction from an early stage.
  • Collaborate with highly experienced engineers and AI specialists.
  • Work with modern technologies across LLMs, agents, RAG, cloud infrastructure, and distributed systems.
  • Join a company investing heavily in AI innovation and enterprise-scale platforms.

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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