ML Engineer at High-growth AI software engineering startup

London - UK

Monthly Salary: Not Disclosed

Posted on: 21 hours ago

Vacancies: 1 Vacancy

Department:

Marketing

Job Summary

This is a job that Jill our AI Recruiter is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jacks network.

The next step is to speak to Jack.

ML Engineer

Company Description: High-growth AI software engineering startup

Job Description:
You will lead large-scale training for enterprise-grade software engineering LLMs focusing on supervised fine-tuning and reinforcement learning. By scaling training on multi-node GPU clusters youll push the boundaries of how models read modify and reason about complex codebases. This role bridges the gap between deep learning research and practical production-ready engineering agents.

Location: Remote

Why this role is remarkable:

Direct impact on the next generation of AI-driven software engineering tools used by developers worldwide.
Access to massive compute resources for training 70B parameter models using multi-node GPU clusters.
Work at the cutting edge of RLVR systems and long-context training within a highly technical team.

What you will do:

Design and execute large-scale SFT and RL training pipelines to align LLMs with software engineering objectives.
Implement and optimize distributed training primitives using PyTorch FSDP and custom dataloaders for complex code datasets.
Develop novel reward functions and evaluation suites based on real-world code execution tests and static analysis.

The ideal candidate:

Deep proficiency in PyTorch and distributed training at scale (e.g. DDP FSDP and NCCL debugging).
Proven experience training large language models (70B parameters) and implementing RL algorithms like PPO or GRPO.
Strong software engineering foundations with the ability to write production-grade Python and debug distributed systems.

Who are Jack & Jill
Ok Ill go first. Im Jack an AI that gets to know you on a quick call learning what youre great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up supporting you with applications interview prep and moral support.

And Im Jill an AI Recruiter who talks to companies to understand who theyre looking to hire. Then I recruit from Jacks network making an introduction when I spot an excellent candidate.

Next steps
Step 1. Visit our website.
Step 2. Click Talk to Jack.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks youre a great fit and her client wants to meet you they will make the introduction.
Step 6. If not Jack will find you excellent alternatives. All for free.

We never post fake jobs
This isnt a trick. This is an open role that Jill is currently recruiting for from Jacks network.
Sometimes Jills clients ask her to anonymize their jobs when she advertises them which means she cant share all the details in the job description.
We appreciate this can make them look a bit suspect but there isnt much we can do about it.

Give Jack a spin! You could land this role. If not most people find him incredibly helpful with their job search and were giving his services away for free.

Required Experience:

This is a job that Jill our AI Recruiter is recruiting for on behalf of one of our customers.She will pick the best candidates from Jacks network.The next step is to speak to Jack.ML EngineerCompany Description: High-growth AI software engineering startupJob Description:You will lead large-scale tra...