ActiveCampaign is seeking a Software Engineer to join our Kraków Hub and build production-ready AI agents for autonomous marketing. Our platform empowers businesses to automate their customer engagement — and we are now extending that with intelligent, agentic workflows that can reason, act, and adapt on behalf of our customers.
Requirements
- 2-4 years of experience in a software engineering role
- Hands-on experience building and running AI agents or agentic workflows in a production environment — not just prototypes or side projects
- Experience with agent evaluation and performance optimization — you know how to measure whether an agent is working well and how to make it better
- Solid backend development skills in Python; working familiarity with PHP is a plus
- Understanding of how to build reliable, testable, and observable systems
- Active practitioner of AI-driven development — you use AI coding assistants and agentic development tools as part of how you work, not just what you build
- Ability to work iteratively and ship code fast — you're comfortable with rapid release cycles and learning from production
- Fluent in English (B2 minimum)
- Willingness to work flexible hours with regular afternoon availability to overlap with US Central timezone
- Experience with agentic AI frameworks or multi-agent orchestration patterns
- Familiarity with Model Context Protocol (MCP) or tool-use patterns for LLM agents
- Experience building eval pipelines or quality measurement systems for LLM-based features
- Frontend experience with React or Ember
- Familiarity with AWS, CI/CD practices, and observability tooling
- Understanding of prompt engineering, evaluation methodologies, or LLM fine-tuning
- Experience in SaaS, marketing automation, or CRM domain
Benefits
- Comprehensive Health & Wellness
- Growth & Development
- Generous Paid Time Off
- Total Rewards
- Collaborative Culture
