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Senior AI R&D Engineer – Model Training (f/m/d)

AlephAlphaHeidelbergResearch
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Senior
Posted
9 Oct 2026
Status
Open · checked 7d ago

About this role

This role suits experienced software engineers who want to build and improve foundation model training pipelines in Heidelberg or Berlin. The position involves working across the full stack to design infrastructure and tooling that accelerates machine learning experimentation.

Role Overview

Aleph Alpha is hiring a Senior AI R&D Engineer for Model Training in Heidelberg or Berlin. The position focuses on building, improving, and scaling model training pipelines and infrastructure for foundation models.

Key Responsibilities

Build and enhance model training pipelines to improve performance, robustness, and iteration speed.
Optimize cluster training load scheduling and enable large-scale code execution for reinforcement learning.
Improve inference throughput on evaluations by working with the evaluation codebase.
Design high-quality tooling and infrastructure while collaborating closely with teammates.
Improve code maintainability through tests, refactoring, and architectural changes.

Requirements

Ability to dive into existing codebases, modify behavior, and leave the code better tested and easier to understand.
Strong understanding of low coupling, high cohesion design principles, and incremental refactoring.
Willingness to work on-site at least two days a week, with occasional travel to Heidelberg if based in Berlin.

Nice to Have

Experience with Python and occasional Rust codebases.
Familiarity with Kubernetes for building training pipelines.
Experience with Test Driven Development, trunk-based development, continuous integration, and Domain Driven Design.

Skills and Tools

Python
Rust
Kubernetes
Test Driven Development (TDD)
Trunk based development
Continuous integration
Domain Driven Design

Salary and Benefits

30 days of paid vacation
Access to fitness and wellness offerings via Wellhub
Mental health support through nilo.health
Substantially subsidized company pension plan
Subsidized Germany-wide transportation ticket
Budget for additional technical equipment
Flexible working hours and hybrid working model
JobRad bike leasing

About the Company

Aleph Alpha operates in Europe focusing on foundation model pre- and post-training to build general-purpose models addressing customer needs. The company maintains a flat organizational structure emphasizing ownership, autonomy, and extreme programming practices like trunk-based and mob programming.

How to Apply

Visit the official company careers page to submit your application for this position.

Skills and tech stack

Questions candidates ask

Where is the position located?

The role is based in Heidelberg or Berlin, with most of the team located in Heidelberg.

What is the working mode for this role?

The position follows a hybrid working model with flexible working hours, and employees are expected to be on-site at least two days a week.

Do I need to be located in Heidelberg if I apply from Berlin?

If you are based in Berlin, you should expect to travel to Heidelberg for a few days approximately every second month.

What programming languages and tools are used?

Most code is written in Python, with occasional Rust codebases and training pipelines built on top of Kubernetes.

What benefits are provided?

Benefits include 30 days of paid vacation, Wellhub fitness access, nilo.health mental support, a subsidized company pension plan, a Germany-wide transport ticket, technical equipment budget, flexible hours, and bike leasing.

Ready to apply?

The application is on the official AlephAlpha careers page.

Apply on company site