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Software Engineer (Agentic)

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Remote

Software Engineer (Agentic)

Refinery89

Software Engineer (Agentic)

Skills

RustNodeLaravelPHPPythonTailwind CSSAWS LambdaGitLabBitbucketPostmanGrafanaPlaywrightCypressAIAWSGitHubJiraJavascriptTerraform

1 month ago

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Important information


Contract type:

Permanent

Location:

Madrid, Spain

Work mode:

Remote

Published on:

10 September 2026

What they need


📍 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

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