Senior AI Engineer (LLM)

Posted July 19, 2026

About this opportunity

Opportunity Overview

This is a job posting for a Senior AI Engineer at Proxify, a company that connects top developers with remote job opportunities. The role involves leading the development and scaling of LLM-powered solutions. Proxify has a network of 5000+ talented developers and has worked with 1200+ happy clients. The company has a 4.5/5 rating on Glassdoor and a 4.8/5 rating on Trustpilot. The Senior AI Engineer will work on transforming raw model capabilities into robust, reliable, and scalable backend services. The role requires expert-level Python skills, experience with Large Language Models, and familiarity with deploying AI models in cloud environments. Proxify offers a range of benefits, including on-time monthly payments, predictable project hours, and up to 24 flex days off per year. The company also provides career-accelerating positions at cutting-edge companies and hand-picked opportunities.

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 (AWS, GCP, or Azure) 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 (Spacy, NLTK) or classic Machine Learning

How to Apply

Review the job description and requirements to ensure you are a good fit for the role.
Prepare your application materials, including your resume and a cover letter.
Click the Apply button below to submit your application.

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