Staff Software Engineer
ActiveCampaign8 months ago
Kraków, PolandStaff+
Responsibilities
- Drive technical direction across multiple Kraków Hub teams and advise on cross-cutting architecture.
- Architect scalable agentic AI features, autonomous workflows, and LLM integrations across platform subsystems.
- Identify and resolve platform-wide performance, scalability, and architectural bottlenecks across React, Ember, PHP, and Python systems.
- Evaluate and lead adoption of AI-assisted engineering tools such as Copilot, Cursor, and Devin.
- Mentor engineers through pairing and code reviews while promoting high ownership and technical rigor.
- Bridge technical strategy and execution for engineers and leadership.
Requirements
- 8+ years of hands-on software engineering experience.
- Deep production experience with PHP and modern backend technologies, plus strong competency in React or Ember.
- Real-world experience designing autonomous agents, multi-agent orchestration, or deep LLM integrations.
- Experience delivering high-impact results across multiple product areas or complex SaaS systems.
- Experience in high-growth SaaS environments, ideally in marketing automation or CRM.
- Experience with AWS, CI/CD, and observability at scale.
- Working knowledge of Python for AI services and experience with MySQL, DynamoDB, or Redis at scale.
- Ability to serve as a trusted technical advisor through sound judgment, architectural documentation, and whole-system ownership.
- Familiarity with the Model Context Protocol or advanced AI coding assistants.
- English fluency at B2 minimum and ability to collaborate with overlap across US Central time.
Benefits
- Medical and dental benefits are paid 100% by ActiveCampaign for the employee and 50% for dependents, plus vision expense reimbursements.
- Complimentary telehealth services and a Calm subscription are provided.
- LinkedIn Learning, professional development programs, and career growth opportunities are available.
- Generous paid time off is offered.
- Pension contributions are matched up to 1.5% of the employee’s contribution.
- A MultiSport Plus card and home office stipend are provided.
- A four-week paid sabbatical with a bonus is available after five years.
- The role is based in the new Kraków, Poland hub and requires collaboration overlapping with US Central time.
Categories
About ActiveCampaign
ActiveCampaign builds a marketing automation and email marketing platform for SMBs, combining campaign orchestration across email, SMS, and messaging with built-in CRM and over 1,000 integrations. Delivered as a subscription SaaS product, it helps teams design automated customer journeys and personalize communications using AI features. Founded in 2003 and headquartered in Chicago, it is privately held and serves customers worldwide across ecommerce, SaaS, and services.