Senior Software Engineer (Python) – AI Product

At Joppy, we are collaborating with one of the fastest-growing AI-native start-ups in the ecosystem, designed to automate human capital management (recruitment, onboarding and employee operations) using autonomous agents and LLMs in real enterprise environments.

We are looking for a Senior Backend / Full-Stack Engineer (with over 8 years’ experience), with a primary focus on backend development, to design, scale and integrate our conversational AI and agent-based platform.

📌 Working arrangement: Hybrid (2 days a week at the Madrid office)

💰 Very competitive salary + Benefits

🛠️ Stack principal: Python (Django/Channels, Async), LLMs, Agents, SQL/NoSQL, Celery/Redis, React, Cloud

🎯 Your Role and Responsibilities

• Back-end development and infrastructure: Design and scale production back-end systems capable of handling high traffic and low latency.
• End-to-end development: Implementing complete functionalities, from APIs and integrations to business logic and AI workflows.
• Pragmatic architecture: Making technical decisions that strike a balance between innovation and the system’s reliability, observability and security.
• Direct collaboration: Working side by side with the Product and Business teams to deploy reliable code that delivers real impact at scale.

🛠️ What we’re looking for in you

• +8 years’ experience in software development, with a primary focus on backend and systems architecture.
• Proficiency in Python: Asynchronous programming, API development and real-time communication using ASGI (Django / Django Channels).
• Quality and Performance: Extensive experience in testing, optimisation, data storage (SQL and NoSQL) and message queues (Celery + RabbitMQ / Redis).
• Full-Stack and DevOps expertise: Functional proficiency in JavaScript frameworks (preferably React), CI/CD pipelines and deployment/scaling in cloud environments.
• AI expertise: Practical experience with LLMs (prompt engineering, RAG, function calling), agent orchestration and monitoring (guardrails, costs and evaluation). Experience in conversational or voice AI (STT/TTS) would be highly desirable.

🌟 What we offer and Team Culture

• High-impact culture: An environment focused on extreme ownership, speed of deployment, autonomy and on-the-job learning.
• Flat structure: Titles take a back seat to actual results and the value delivered to customers.
• Flexibility and collaboration: A hybrid model designed to maintain the agility of remote working whilst ensuring the team remains aligned.