Back End Developer

We are looking for a Backend Software Engineer (AI Training & Language Specialist) to join our engineering and AI research efforts. In this role, you will directly contribute to the advancement of state-of-the-art Large Language Models (LLMs) by producing high-quality code, providing expert feedback, and helping shape the evolution of the Motoko programming language.

If you are passionate about backend engineering, programming language design, and the intersection between software engineering and AI, this opportunity is for you.

💻 What you will be doing

• Advance the AI frontier by contributing high-quality code samples in Motoko, an underrepresented programming language, used to train state-of-the-art LLMs.
• Contribute to AI training efforts through Supervised Fine-Tuning (SFT), Direct Preference Optimization (DPO), and Reinforcement Learning (RL).
• Provide critical backend engineering feedback to validate and improve paradigms within the Motoko language and its core data structure libraries.
• Act as a subject matter expert, ensuring that both synthetic and human-generated training data reflect best-in-class software engineering principles.
• Bridge the gap between engineering and AI by applying real-world backend expertise to AI model development.

🧠 What we are looking for

• Mid-level experience in backend software development with a strong command of Object-Oriented (OO) design patterns.
• Solid understanding of Computer Science fundamentals, particularly Data Structures and Algorithms, including optimization for specific constraints.
• Proficiency in at least one of the following programming languages: Java, C#, or TypeScript.
• Strong architectural knowledge, especially Domain-Driven Design (DDD) and Service-Oriented Architecture (SOA).
• A quality-driven mindset with a passion for writing clean, idiomatic, and maintainable code that serves as a gold standard for both humans and machines.

🌍 Location

📍 Remote — open to candidates based in Portugal