About Orbio

Orbio is an AI-native human capital management platform building a Digital Workforce for HR .

We design and deploy agentic systems that take ownership of operational execution across hiring, onboarding, and employee operations — while keeping humans in control.

We work with large, complex organizations across sectors such as staffing, retail, hospitality, and healthcare. Our customers operate at high volume and rely on Orbio to reduce operational friction, improve speed and quality, and scale their teams without proportional headcount growth.

Orbio is not a system of record. We sit on top of existing HR systems and own the execution and coordination layer — where day-to-day work actually happens.

Position Overview

Orbio is looking for a backend-focused Python engineer to take on a Tech Lead role and help build our conversational, agentic AI platform.

As a senior / founding-level engineer, you will play a key role in architecting and scaling intelligent workflow systems that support hiring, onboarding, and employee experiences in real enterprise environments.

You will help build an end-to-end, production-grade B2B platform with a strong focus on LLMs, autonomous agents, and conversational AI, defining core technical foundations that will scale across customers and markets.

What You'll Do

Set technical strategy and architectural direction for the platform

Drive technical decisions balancing innovation with production reliability

Collaborate with product and business stakeholders to translate requirements into technical roadmaps

Hands-on contribution to critical systems while scaling the team

Lead, mentor, and grow a high-performing engineering team

Establish engineering best practices, code quality standards,



and development processes

All the desired Technical Skills we are looking for

Python expertise

Async programming, API development, real-time ASGI, Django/Channels

Testing, logging, monitoring, performance optimization

Production-grade application development

Knowledge of data storage solutions (both SQL and NoSQL)

Async message queues (Celery + RabbitMQ / Redis)

Experience with high-throughput, low-latency systems

LLMs usage

Strong understanding of LLMs, prompt engineering, chaining, caching and model fine-tuning

Experience with both open-source and closed-source LLMs

Experience with Retrieval-Augmented Generation (RAG) and vector databases

Experience with LLM frameworks such as LlamaIndex

Understanding of model evaluation metrics and performance benchmarks

LLM cost-optimisation strategies

LLM guardrails and security best practices

Agentic AI development

Experience with agentic frameworks and agent design patterns

Implementation of planning and reasoning systems

Multi-agent architectures and agent orchestration/delegation

Tool implementation and function calling (API wrapper, validation, error handling)

Context management and long-term knowledge preservation

Multi-agent evaluation and testing (consistency, performance, reliability)

Conversational AI

Using STT and TTS models





Managing turn-talking / interruption (voice activity detection)

Telephony systems (Twilio, IVR) implementation with focus on latency optimization

Voice interface design and conversation flow architecture

LLM interaction including function calling

Conversation memory management and context preservation (+ RAG)

Multi-modal conversation handling (voice, text, visual inputs)

Implementation of fallback strategies and graceful degradation

Full-Stack & DevOps

Full-stack experience with JavaScript frameworks (React preferred)

CI/CD pipelines

Cloud platforms (AWS/GCP/Azure)

Deploying and scaling AI systems in production

Leadership Experience

Experience defining technical roadmaps and architecture

Strong communication skills across technical and non-technical stakeholders

Startup or high-growth environment experience preferred

Track record of leading and growing engineering teams

What Success Looks Like at Orbio

Core backend and agentic systems run reliably in production at enterprise scale

AI workflows meaningfully reduce operational friction for customer teams The platform compounds: new deployments get faster and more robust over time

Technical foundations support autonomy, observability, and safe decision-making

Engineering velocity stays high without sacrificing reliability

Culture at Orbio

Orbio is a high-bar, high-intensity environment. We optimize for impact, speed, and ownership — not comfort.

We operate as one team, with a flat structure and extreme ownership. We ship fast, learn from production, and challenge each other directly because we care about building something that lasts. Titles matter less than outcomes. Customers come first. Momentum matters.

📌 Engineering Lead - Hands-on Backend focus (Python) / Full-Stack experience (Madrid)
🏢 Orbio
📍 Madrid