We're seeking a Senior Software Engineer to join our Bulgaria-based engineering team. You'll be a core part of the newly launched AI Hub — our dedicated AI automation layer within OfficeRnD Flex. The AI Hub is redefining how flexible workspace operators run their businesses, starting with our first autonomous agent: the AI Sales Agent.
Requirements
- 5+ years of backend engineering experience in cloud-based, production environments.
- Proficiency in at least one server-side technology (Node.js, Java, or.NET).
- Hands-on experience integrating LLMs or building AI-driven features in production - and genuine curiosity about where autonomous agents are heading.
- Experience designing AI agent architectures - tool/function calling, multi-step reasoning, memory/context management, and observability.
- Strong foundation in API design, distributed systems, and real-time data processing
- Experience with MongoDB schema design and query optimization; familiarity with vector DBs or caching strategies for AI is a plus.
- Extensive knowledge of software design principles - you default to clean architecture, separation of concerns, and domain modelling.
Benefits
- Premium health insurance, including dental coverage
- 25 days of annual paid leave
- An additional day off to celebrate your birthday
- 3 paid volunteering days per year
- Full compensation for the first 3 days of sick leave
- Hybrid work model (minimum 40% of monthly working time onsite)
- Co-funded sports card to support your active lifestyle
- Excellent learning and development opportunities, including access to courses, tools, and internal workshops focused on AI and modern engineering.
- To ease your commute, we provide you with either parking access or a public transport pass.
