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- Full Remote

- European Timezone
- Professional English Required

About The Role We're looking for a 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
- Cypress
- Grafana
- k6
- Postman

Agentic &

- AI Tooling

- Claude (Anthropic)
- Kiro
- Experience building or working with LLM-powered agents, tool use, MCP integrations,



or prompt engineering at an engineering level

Platform &

- Collaboration

- Bitbucket
- Jira / Atlassian suite

AdTech (nice to have)

- Google Ad Manager (GAM)
- Prebid.js
- Prebid Server

Methodologies &

- Principles

- SDD (Spec-Driven Development)
- TDD
- BDD
- SOLID
- DDD
- OWASP
- CI/CD pipelines (Bitbucket Pipelines, GitLab CI, GitHub Actions)

What We're Looking For

- 5+ years of experience in backend or full-stack software development.
- Practical experience with agentic AI systems — building agents, designing tool use, working with LLM APIs, or automating complex workflows with AI.
- Strong technical analysis and design skills: you can break down complex problems, propose well-reasoned solutions, and think through the implications of architectural decisions.
- Critical thinking: you don't execute blindly. You question, challenge, and improve — including the outputs of AI tools.
- Attention to detail: the code you ship is clean, tested, and documented. You apply the same standard to AI-generated code.
- True ownership: you're accountable for what you build — in production, over time.
- Autonomy: you know how to move forward without hand-holding, and when to raise a flag.
- Proactive attitude: you surface improvements, catch problems before they become incidents, and share knowledge freely.
- Eagerness to learn: the agentic era is moving fast, and you're moving with it.
- Fluent professional English, written and spoken. The team is fully remote and multicultural.

What We Offer

- Full remote — work from anywhere within the European timezone (CET ±2h).
- Small, technical team with minimal overhead.
- Direct impact: your decisions ship to production.
- A culture of honest feedback and continuous improvement.
- Modern tooling — including cutting-edge AI — and freedom to propose new approaches.
- A front-row seat to the agentic engineering shift, not just as a user but as a builder.

If this sounds like you and you want to build something that matters, we'd love to hear from you.

- Permanent
- Full time
- Remote

📌 Software Engineer (Agentic) (España)
🏢 Refinery89
📍 España