Software Engineer (AI)

Location: Sofia, Bulgaria; in-office

Salary: €4,700–€5,900 per month

Company

hirify.global builds AI infrastructure for serving open-source models, from GPU infrastructure through the API layer.

What you will do

• Design, develop, test, and scale inference solutions for state-of-the-art AI models.
• Implement, optimize, and evaluate models using Python, C++, CUDA, and NCCL.
• Own and operate production model-serving systems, including monitoring and debugging.
• Build features, improve performance, and contribute to system architecture.
• Participate in code reviews and technical discussions.
• Explore AI/ML techniques and take ideas from concept to production.

Requirements

• Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or a related field.
• 3+ years of relevant software engineering experience.
• Strong fundamentals in data structures, algorithms, and software design.
• Proficiency in Python and experience with AI/ML frameworks such as PyTorch or TensorFlow.
• Hands-on experience building, shipping, maintaining, debugging, and optimizing software systems.
• Familiarity with AI models, Transformers, Diffusers, Git, and collaborative development workflows.

Nice to have

• Experience with C++, CUDA, or AI inference.
• Contributions to open-source machine learning projects.

Culture & Benefits

• Work on AI model-serving systems for LLMs and multimodal models.
• Small team with direct customer impact and end-to-end ownership.
• Fast-paced environment with autonomy and opportunities to learn from engineers building high-performance inference systems.
• Initiative, drive, persistence, and continuous improvement are valued.