Senior AI Engineer (LLM)

Posted July 19, 2026

About this opportunity

Opportunity Overview

Proxify is looking for a Senior AI Engineer to lead the development and scaling of their LLM-powered solutions. This role is for an expert with a foundation in Python and a deep understanding of the generative AI lifecycle. The Senior AI Engineer will be responsible for transforming raw model capabilities into robust, reliable, and scalable backend services. Proxify connects top developers around the world with opportunities, and this role is a remote full-time job. The company has a global network of supportive, talented developers and has worked with 1200+ happy clients. Proxify has a 4.5/5 rating on Glassdoor and a 4.8/5 rating on Trustpilot, reflecting the trust developers place in them. This role is designed for an expert who understands the nuances of the generative AI lifecycle, from prompt engineering and RAG architecture to fine-tuning and production-grade deployment.

Responsibilities

Architect and implement complex AI workflows using frameworks like LangChain, LlamaIndex, or Haystack
Design and optimize Retrieval-Augmented Generation (RAG) pipelines, including vector database management and advanced indexing strategies
Evaluate and implement strategies for model selection based on latency, cost, and performance requirements
Develop high-performance Python backends to serve AI features to a global user base
Build robust evaluation frameworks to measure LLM accuracy, reduce hallucinations, and monitor production performance
Work closely with product and engineering teams to identify high-impact AI opportunities and navigate the technical trade-offs of generative AI

Benefits

On-time monthly payments with flexible withdrawal options
Predictable project hours with consistent 8-hour working days
Up to 24 flex days off per year without losing pay
Career-accelerating positions at cutting-edge companies
Hand-picked opportunities with personally matched positions
A one-time contracting process for endless opportunities, with no extra assessments
The same pay every month with positions landed through Proxify

Requirements & Qualifications

Expert-level Python skills with a deep understanding of asynchronous programming and backend architecture
Proven experience building and deploying production-level applications using Large Language Models (LLMs)
Strong experience with SQL and NoSQL databases, specifically optimized for high-dimensional vector search
Familiarity with deploying AI models in cloud environments and managing CI/CD for AI services
A 'first-principles' approach to solving the unique challenges of non-deterministic AI outputs
Experience with fine-tuning open-source models using techniques like LoRA or QLoRA
Knowledge of agentic frameworks and autonomous AI agents
A background in traditional NLP or classic Machine Learning

How to Apply

Review the requirements and responsibilities to ensure you are a good fit for the role.
Prepare your application, including your resume and any other required documents.
Click the Apply button below to submit your application.

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