Senior AI Engineer

Our client has been into AI before it was cool and has gathered tons of research knowledge on AI, LLMs, RAGs being a personal research assistant to a solid client base. As part of their growth, they are looking for a Senior AI Engineer to join their team. 

Tech stack: Service-oriented architecture, microservices, Python, Django, PostgreSQL, non-relational and vector databases (Elasticserach/ OpenSearch, ChromaDB, Couchbase), AWS, GenAI tools (Windsurf, Cursor, Amazon Q, Claude, etc.), AI/ ML/ NLP libraries (Gensim, Torch, Transformers, spaCy, Autogen, etc.), Git & CI/CD.

Hands-on development responsibilities:

• Own the full development lifecycle – from idea to architecture, implementation, testing, and delivery of real-world AI products.
• Design and build robust AI systems, including Retrieval-Augmented Generation (RAG) pipelines and LLM Evaluation Frameworks.
• Drive innovation by testing new approaches and bringing new AI research into production.
• Work closely with researchers, product managers, and fellow engineers to shape and ship powerful features.
• Build systems for performance and reliability, ensuring they are scalable, testable, and maintainable.
• Contribute to a global mission to transform how the world interacts with scientific knowledge and applied AI.

Requirements:

• 5+ years in software development, including 3+ years with Python.
• Solid experience in web backends (Django/Flask), REST APIs, databases, and cloud infrastructure.
• Familiarity with ML systems or motivation to learn in depth.
• Proficiency in English.

Considered as a big plus:

• Degree in Computes Science or ralated field.
• Previous work with LLMs, NLP, or AI model evaluation.
• Experience contributing to or using RAG systems in production.
• Open-source contributions, academic research, or mentoring.

In Return, They Offer:

• A job with a global mission to advance Science.
• Annual Salary Review.
• Share incentivization plan
• 30 days vacation.
• Flexible work hours.
• Remote-first policy with hybrid options for Sofia, Bulgaria.
• Personal equipment reimbursement program.
• Free MultiSport card.
• Private Health Insurance – premium package.
• Career Enhancement plan.
• Workshops, Conferences, Hackatons, Tech Deep Dives (internal & external).

(No. 2709 from 17.01.2019)