Full Remote · European Timezone · Professional English Required

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About the Role

We're looking for a Senior Software Engineer with an Agentic mindset — someone who doesn't just write code, but builds systems that think, act, and adapt. You'll work on a production AdTech platform with real business impact, and you'll increasingly work alongside AI agents and design agentic workflows as part of your daily engineering practice.

This is not a ticket-execution role. We expect you to bring judgment, ask the hard questions, design thoughtfully, and genuinely care about the quality of what you ship — whether that code was written by you, assisted by AI, or executed autonomously by an agent you designed.

Responsibilities
- Design, develop, and maintain robust, scalable backend services following Domain-Driven Design (DDD) principles.
- Take full technical ownership of features — from design through deployment and monitoring.




- Build and orchestrate agentic workflows: autonomous pipelines where AI models (Claude, LLMs) take actions, call tools, and solve tasks with minimal human intervention.
- Actively participate in architecture decisions with strong analytical thinking and technical depth.
- Ensure code quality through SDD, TDD, and BDD methodologies, with sharp attention to detail.
- Collaborate on code reviews, refinements, and technical planning.
- Proactively identify and address technical debt, performance bottlenecks, and security risks (OWASP, SOLID).
- Build and maintain CI/CD pipelines across Bitbucket, GitLab, or GitHub.
- Produce well-reasoned technical designs before writing the first line of code.

Tech Stack

Languages
- PHP (required) · JavaScript / Node.js · Python
- Rust (nice to have)

Frameworks & Tools
- Laravel · Pest · Tailwind CSS
- AWS: Lambda, SAM Templates, S3, CloudFront
- Terraform · Playwright · Robot Framework · Cyp

📌 Sr. Software Engineer (Madrid)
🏢 Refinery89
📍 Madrid