Staff Software Engineer

• Drive technical direction across multiple Kraków Hub teams, acting as a strategic advisor or embedding directly into squads when technical complexity demands a master-level touch
• Architect scalable agentic AI features, ensuring autonomous workflows and LLM integrations across platform subsystems—from CRM to email automation—are reliable and maintainable at scale
• Identify and resolve platform-wide bottlenecks with a whole-system perspective, optimizing everything from frontend rendering in React/Ember to deep backend logic in PHP and Python
• Champion AI-assisted engineering practices, leading the evaluation and adoption of cutting-edge tools (like Copilot, Cursor, or Devin) to transform how our internal teams build and test software
• Mentor and grow the next generation of talent, using pairing and code reviews to foster a culture of high ownership and technical rigor within the hub
• Bridge the gap between strategy and execution, articulating the basis for technical decisions to both engineers and leadership to balance business speed with long-term architectural health

• 8+ years of hands-on software engineering experience, with a demonstrated track record of delivering high-impact results across multiple product areas or complex SaaS systems
• Multi-stack mastery with deep production experience in PHP and modern backend technologies, complemented by a strong competency in React or Ember
• Proven expertise in AI and Agentic development, including real-world experience designing autonomous agents, multi-agent orchestration, or deep LLM integrations
• The ability to act as a technical advisor, earning trust across the organization through sound judgment, clear architectural documentation, and a "whole-system" ownership mindset
• Experience in high-growth SaaS environments, ideally within the marketing automation or CRM domain, with a solid understanding of AWS, CI/CD, and observability at scale
• A working knowledge of Python for AI services and experience with data stores like MySQL, DynamoDB, or Redis at scale
• Fluency in English (B2 minimum) and the flexibility to collaborate effectively across time zones, specifically overlapping with US Central time

Familiarity with emerging AI standards, such as the Model Context Protocol (MCP) or advanced AI coding assistants

• Comprehensive Health & Wellness: Top-tier benefits package that includes medical and dental benefits paid 100% by ActiveCampaign for you and 50% for your dependents, and reimbursements on vision expenses
• Access to telehealth services, and a free subscription to Calm
• Growth & Development: Access to LinkedIn Learning, professional development programs, and career growth opportunities
• Generous Paid Time Off
• Total Rewards: Pension scheme with matching up to 1.5% of your contribution, MultiSport Plus card, home office stipend, and a four-week paid sabbatical with bonus after five years
• Collaborative Culture