Machine Learning Engineer (Visual Specialist)

OhChat
London
23 hours ago
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About Oh



The following information aims to provide potential candidates with a better understanding of the requirements for this role.

Oh is on a mission to become the OpenAI of the spicy content industry, building a full-spectrum ecosystem of revolutionary AI infrastructure and products. Our platform, OhChat, features digital twins of real-world personalities and original AI characters, enabling users to interact with lifelike AI-generated characters through text, voice, and images, with a roadmap that includes agentic superModels, API integrations, and video capabilities.


We’re looking for a Machine Learning Engineer with deep expertise to own, optimise, and scale our AI models, ensuring cutting-edge performance and user engagement.


The Role


We are seeking a Machine Learning Engineer with a focus on back-end Python engineering visual asset generation to join our team. The ideal candidate will have hands-on experience in working with deep learning models for image and video generation, leveraging technologies such as SDXL, Flux, and WAN 2.1. You should be familiar with popular machine learning frameworks like PyTorch, Diffusers, Transformers, and Docker. As a member of our team, you'll work closely with researchers, engineers, and creatives to develop and deploy solutions that generate high-quality visual content, as well as playing a key part in building the back-end of our platform.


What You’ll Do


Model Development & Optimisation:Fine-tune and optimise open-source and proprietary generative models (e.g., Flux, Wan 2.1).

Inference Optimisation & Scaling:Deploy and optimise models optimised for low latency and cost-effective inference onGPU-based infrastructure.

Custom Model Training:Train models with domain-specific datasets, improve response quality, reduce hallucinations, and enhance alignment with user intent.

Back-end engineering:Write clean, scalable Python code to expand and improve our back-end

Security & Compliance:Ensure AI models meet GDPR and ethical AI guidelines for content generation.

*Important note: As a part of this role you will be responsible for managing and maintaining large multimedia datasets of NSFW/adult content.


What We’re Looking For


3+ years of experience in machine learning engineering with a focus on GenAI

Strong expertise in Stable Diffusion, Flux, and similar architectures

Experience fine-tuning and optimising visual models

Hands-on experience with PyTorch, JAX, or TensorFlow

Proficiency in GPU inference optimisation (CUDA, BitsAndBytes, PEFT)

Experience deploying ML models using Kubernetes and/or Docker

Strong experience with Python and software engineering best practices

Experience integrating visual models into real-world applications with performance constraints


Bonus if you have:

Experience working in multimodal AI (text, voice, image, or video models)

Experience working as a full-stack engineer (especially back-end and DevOps-focused)

Background in AI-driven gaming, adult content, or interactive digital experiences

Interest in crypto, Web3, or NFT-based AI models


Why Join Us?


Remote-first

Competitive salary

Work on cutting-edge models powering next-gen AI interactions

Ownership & autonomy in shaping our AI strategy

Hands-on role in a company that ships fast and iterates rapidly

Experiment with state-of-the-art AI models & inference techniques


This is a unique opportunity to lead the AI development of one of the most exciting AI companies in the companionship space. If you're passionate about building, optimising, and scaling AI-driven characters, we’d love to hear from you.

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