SENIOR AI ENGINEER (PYTHON, LANGCHAIN)- PRETORIA (HYBRID) - UP TO R1M PER ANNUM

E-Merge; South Africa; On-site; ZAR 900,000 - 1,100,000; Full time

Job summary

e-Merge IT Recruitment is seeking a Senior AI Engineer based in Pretoria to lead the development of production-grade AI solutions using LangChain, LangGraph, and state-of-the-art LLM tooling. You will influence architectural decisions, optimize inference costs, and build scalable cloud-native applications.

The role requires expert Python, strong API design with FastAPI/Flask, and experience with vector databases and PostgreSQL.

Qualifications

• Expert proficiency in Python is mandatory.
• Deep architectural understanding and production experience with LangChain; LangGraph for multi-agent orchestration is desirable.
• Advanced knowledge of vector search optimization and indexing with Pinecone/Weaviate/Qdrant/pgvector.
• Understanding of fine-tuning principles and trade-offs vs RAG; managing context windows and optimizing inference costs/latency for GPTs/Claude/local LLMs.
• 6+ years of general Software Engineering experience.
• Demonstrated technical leadership in delivering complex software projects.
• Proven portfolio of building LLM-based applications or agents.
• Expert skills in FastAPI or Flask including asynchronous design patterns.
• PostgreSQL expertise; NoSQL and data consistency concepts.
• Extensive cloud experience (AWS Bedrock/SageMaker/Lambda/ECS) or Azure.
• Docker and orchestration (Kubernetes or ECS).
• IaC proficiency with Terraform, AWS CDK, or CloudFormation.

Skills

Python

LangChain

LangGraph

LLM applications

Fine-tuning concepts

RAG

API design

Education

IT Degree (Computer Science/Engineering)

Tools

Pinecone

Weaviate

Qdrant

pgvector

FastAPI

Flask

PostgreSQL

NoSQL

AWS Bedrock

SageMaker

Lambda

ECS

Docker

Kubernetes

Terraform

AWS CDK

CloudFormation

Job description

A global technology organisation focused on delivering innovative digital solutions, intelligent technology, and business transformation to organisations operating in complex environments is looking for an exceptional Senior AI Engineer to join them

You will have the opportunity to work on sophisticated AI applications, influence technical architecture, and turn emerging AI capabilities into production-grade solutions

If Python is your engineering foundation, LangChain is part of your AI toolkit, and you're excited about what's possible with intelligent systems, this is an opportunity to make a significant impact -

Requirements:

• Languages: Expert proficiency in Python is mandatory.
• LLM Frameworks: Deep architectural understanding and production experience with LangChain. Proficiency with LangGraph for multi-agent orchestration is highly desirable.
• Vector Databases: Advanced knowledge of vector search optimization, indexing, and implementation (e.g., Pinecone, Weaviate, Qdrant, or pgvector).
• Models: Understanding of fine-tuning principles and trade-offs vs RAG. Experience managing context windows and optimizing inference costs/latency for GPTs, Claude, or local LLMs.
• 6+ years of general Software Engineering experience.
• Demonstrated technical leadership in delivering complex software projects.
• Proven portfolio or track record of building LLM-based applications or agents.
• API Development: Expert skills in FastAPI or Flask, including asynchronous design patterns.
• Databases: Advanced proficiency with PostgreSQL (schema design, query optimization); understanding of NoSQL and data consistency models.
• Cloud: Deep experience designing scalable solutions on AWS (Bedrock, SageMaker, Lambda, ECS) or Azure.
• Containerization: Expertise in Docker and orchestration (Kubernetes or ECS).
• IaC: Proficiency with Terraform, AWS CDK, or CloudFormation.
• IT Degree (Computer Science, Engineering, or related field)

Reference Number for this position is MAT60986 which is a permanent position based in Pretoria offering a cost to company salary of up to R1m per annum depending on experience and ability. Contact Mavis on [email protected] or call her on011 463 3633 to discuss this and other opportunities.

Are you ready for a change of scenery? The e-Merge IT recruitment is a specialist niche recruitment agency. We offer our candidates options so that we can successfully place the right developers with the right companies in the right roles. Check out the e-Merge website www.e-merge.co.za for more great positions.

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