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Software & Marketing — US

ActiveCampaign is the AI-first autonomous marketing platform built to transform how marketers, agencies, and entrepreneurs work. Use Active Intelligence to power goal-aware automations and orchestrate AI agents to uncover deep performance insights and deliver cross-channel campaigns without the heavy lifting.

Job offers

ActiveCampaign

Senior Software Engineer

Krakow

zł 224K - 336K

Development

What your day could consist of:

  • Agency Platform & AI Development Building and enhancing features across the Agency platform including partner tooling, multi-account management, and API services in PHP Designing and implementing agentic AI workflows that automate and enhance partner and reseller experiences Integrating LLM-powered capabilities into core Agency features — from intelligent recommendations to automated partner operations Contributing to our Python-based AI agent development and iteration Driving productization — evolving Agency features to be more scalable and configurable for diverse partner needs Maintaining and evolving legacy codebases while driving modernization efforts
  • Collaboration Working with cross-functional teams including Product, Design, and other engineering squads Engaging in pairing and code reviews Participation in the on-call rotation for incidents

Requirements

  • 4+ years of work experience in a backend software engineering role
  • Demonstrated knowledge of the challenges of scaling SaaS systems
  • Experience writing production code in PHP following accepted coding standards
  • Experience with Python for backend services or AI/agentic workflows
  • Familiarity with DB technologies: MySQL, DynamoDB, Redis
  • Strong problem-solving skills and ability to work across multiple codebases and technologies

Nice-to-Haves

  • Experience building or integrating AI/ML systems, LLM-powered features, or agentic workflows
  • Deeper database expertise — query optimization, data modeling, schema design, or experience with data pipelines and analytics infrastructure
  • Familiarity with CI/CD practices and patterns
  • Knowledge of AWS (or any public cloud)
  • Experience with API design and platform/partner ecosystem development
  • Track record of identifying and delivering performance improvements in production systems
  • Experience with SaaS productization

Compensation: zł 224,000 - 336,000 (per year salary)

This is an exciting time to join ActiveCampaign as we build out our new office in Poland. You will be a large part of developing our office culture in this new Krakow hub location.

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