Software Engineer - Platform (Greece)

About Oumi

Why we exist: Oumi is on a mission to make frontier AI truly open for all. We are founded on the belief that AI will have a transformative impact on humanity, and that developing it collectively, in the open, is the best path forward to ensure that it is done efficiently and safely. By providing the safest, highest quality, and most flexible AI, we aspire to unlock positive impact for every individual, enterprise, and humanity overall.

What we do: Oumi provides an all-in-one platform to build state-of-the-art AI models, end to end; from data preparation to model training, evaluation and production deployment, empowering innovators to build cutting-edge models at any scale. Oumi also advances open foundation models in collaboration with academic collaborators and the open community.

Our Approach: Oumi is built on a foundation of open source, with open collaboration at the heart of everything we do. Our work is:

• Research-driven: We conduct and publish original AI research, working closely with academic research labs and collaborators across the globe.

• Community-powered: We believe in the strength of open collaboration and actively welcome contributions from researchers and developers worldwide.

• Accessibility-focused: We design Oumi to help any organization—regardless of size or resources—effectively build, deploy, and benefit from AI by lowering barriers to access, experimentation, and adoption.

Role Overview

We're seeking an experienced Platform Engineer who thrives in 0-to-1 environments to join Oumi's engineering team. You'll architect, build, and maintain the core platform services that power our products, working across the full technology stack with a focus on backend systems and infrastructure.

What you’ll do:

• Platform Architecture: Design and implement scalable, maintainable platform architecture from the ground up, making strategic technical decisions that will shape our technology foundation

• Backend Development: Build robust, high-performance backend services and APIs using Python, with optional Rust for performance-critical components

• Infrastructure as Code: Implement infrastructure automation using modern DevOps practices and tools

• Technical Leadership: Provide technical guidance on best practices, architecture decisions, and coding standards

• 0-to-1 Development: Convert product requirements into fully functioning systems, taking ownership of features from concept to production

What you’ll bring:

• Experience: Proven experience in software development, with a strong understanding of programming languages such as Python, Rust or Javascript.

• 0-to-1 Track Record: Demonstrated success building systems from scratch in fast-paced environments

• Technical Expertise:

• Strong proficiency in Python for backend development

• Knowledge of Rust or willingness to learn for performance-critical components

• Familiarity with cloud platforms (AWS/GCP/Azure)

• Experience with containerization (Docker) and orchestration (Kubernetes)

• System Design: Ability to design clean APIs, scalable architectures, and efficient data models

• DevOps Mindset: Experience with CI/CD pipelines, monitoring, and observability tools

• Communication: Excellent communication and collaboration skills, with the ability to work effectively with cross-functional teams.

• Open Source: Familiarity with open-source projects and a passion for contributing to the open-source community.

• Values: Share Oumi's values: Beneficial for all, Customer-obsessed, Radical Ownership, Exceptional Teammates, Science-grounded.