Senior Software Engineer, AI Platform (100 remote-friendly within Spain)

We are laying the groundwork for the future of AI at Docplanner - scalable systems, multi-agent architecture, MCP servers, and seamless integration into our products. We are looking for a Senior Software Engineer with a strong software engineering background and AI engineering experience to join the team.

The AI Platform team is accountable for two main objectives:

• Designing, building and maintaining the company's AI infrastructure, ensuring high availability, scalability, security and cost efficiency.
• Adopting new technologies like MCP and A2A.

Challenges include a dynamic environment with rapid changes, working with multiple technologies (C#/.NET for backend; Python for AI projects) and a large distributed system with many services. What you'll do

• Design and implement scalable systems for AI Agents, MCP, and emerging architectures.
• Adopt new technologies coming up with AI.
• Build internal tools that empower product teams across Docplanner.
• Ensure reliability, security, and cost efficiency of AI infrastructure.
• Work cross-functionally to accelerate AI adoption in our products.

You're likely a great fit for this role if you...

• Strong software engineering background (Python preferred; C#, PHP experience a plus).
• Exposure to distributed systems and managing services at scale.
• Experience building or deploying ML/LLM solutions (e.g., fine-tuning, RAG pipelines, model evaluation, production APIs).
• Understanding of software architecture and engineering best practices (REST, SOLID, GIT, CI/CD, DDD, TDD, Clean, Agile, etc.).
• Familiarity with data pipelines, model orchestration, and prompt engineering.
• Growth mindset and comfort in a fast-changing environment.
• English fluency (B2+).

Nice to have

• Experience with AI/ML tools (LangChain, LlamaIndex, etc.).
• Knowledge of RAG pipelines and MLOps practices.
• Cloud platform expertise (GCP, AWS, Azure).
• Exposure to other OOP stacks (.NET, PHP).

Compensation structure

• A salary adequate to your experience and skills.
• Flexible remuneration and benefits system via Flexoh, which includes: restaurant card, transportation card, kindergarten, and training tax savings.
• Share options plan after 6 months of working with us.

True flexibility and work-life balance

• Remote or hybrid work model with our hub in Barcelona.
• Flexible working hours (fully flexible; typically a couple of meetings weekly).
• Summer intensive schedule in July and August (7 hours days, finish earlier).
• 23 paid holidays, with exchangeable local bank holidays.
• Additional paid holiday on your birthday or work anniversary.

Health comes first

• Private healthcare plan with Adeslas for you and subsidized for your family (medical and dental).
• Access to hundreds of gyms for a symbolic fee in partnership with Wellhub for you and your family.
• Access to iFeel, a platform for mental wellness offering online psychological support and counseling.

Company description: Welcome to the good side of tech. Znanylekarz experience and Docplanner Tech narrative are included to show scale and impact. We are a diverse group of engineers, data and product professionals, working to make the healthcare experience more human. We are 100% remote-friendly and encourage you to bring your whole self. We are leaders in 13 countries, with over 90 million patients trusting us every month, 300,000+ specialists believing in our product, and over 2,500 employees worldwide. Docplanner Tech fits as a diverse, global engineering organization responsible for building the product for all locations. The AI Platform team is part of the Internal Platform area and currently comprises a small but growing team dedicated to AI infrastructure and products. Area of Work