Software Engineer (Agentic)

Refinery89; Muel; Remote; EUR 75,000 - 110,000; Full time

Benefits offered by this job

Full remote within EU timezone

Small, technically focused team

Direct impact: production deployments

Modern tooling with AI

Front-row seat to agentic engineering

Permanent

Full time

Remote

Job summary

Refinery89 is seeking a Software Engineer with an Agentic mindset to build a production AdTech platform. You will design and implement robust backend services, leveraging AI agents and agentic workflows.

This fully remote role requires strong English, 5+ years of backend or full-stack experience, and a hands-on approach to architecture, testing, and secure code. You will work in a European timezone and collaborate across a small, technical team.

Qualifications

• 5+ years of backend or full-stack software development.
• Hands-on experience with agentic AI systems and LLM APIs.
• Strong design and architectural thinking; ownership of production features.
• Fluent professional English; remote, multicultural team.

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 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.

Skills

Backend development

Full-stack development

Agentic AI systems

System architecture

Tools

Laravel

Pest

Tailwind CSS

AWS

Terraform

Playwright

Robot Framework

Cypress

Grafana

k6

Postman

Jira

Bitbucket

GitHub Actions

Job description

Software Engineer (Agentic)

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.
• Permanent
• Full time
• Remote

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