ActiveCampaign is the leader in marketing automation, email marketing and CRM for businesses of all sizes and industries. Its powerful automation platform helps organizations in 170 countries grow by scaling and personalizing customer experiences. ActiveCampaign accelerates business growth by providing access to 925+ pre-built automations that combine transactional email and email marketing, marketing automation, ecommerce marketing, and CRM to enable 1:1 experiences that connect across all channels and through the entire customer lifecycle. Over 70% of ActiveCampaign’s customers use its 900+ integrations, including Microsoft, Shopify, Square, Facebook, and Salesforce. ActiveCampaign is one of only 17 products with over 10,000 positive customer reviews on G2.com, scoring higher in customer satisfaction than any other solution in Marketing Automation, CRM, and E-Commerce Personalization, and is the Top Rated Email Marketing Software on TrustRadius. Start a free trial at ActiveCampaign.com.

Join us in revolutionizing how small and medium businesses harness AI for marketing success. As the Principal AI Engineer, youll architect the next generation of agentic AI systems that autonomously optimize marketing campaigns, making enterpriselevel AI accessible to SMBs worldwide. You will lead the charge in translating our ambitious vision into tangible, impactful AI products, guiding a team of talented data scientists and product managers to achieve our strategic objectives.

What Youll Build: Strategically define and implement our foundational AI data platform, ensuring enterprisegrade scalability, reliability, and performance.
Drive the development and deployment of productionready agentic systems that autonomously execute marketing strategies.
Architect and oversee the creation of robust MLOps pipelines supporting model training, deployment, and continuous improvement.
Prototype and deploy stateoftheart machine learning models, specializing in agentic AI systems.
Advance our LLM capabilities through innovative RAG implementations, finetuning strategies, RLHF, and comprehensive model evaluation frameworks.
Lead the research and integration of emerging AI technologies, translating academic breakthroughs into practical business solutions.
Conduct deep statistical analysis to identify the patterns and metrics that drive successful marketing campaigns.
Own the development of endtoend data science products from proofofconcept through production deployment.
Develop quantitative impact metrics and compelling visualizations that demonstrate clear ROI for SMB clients.
Champion collaboration with product, engineering and crossfunctional organizations, ensuring seamless integration of AI models.

What were looking for:
12+ years of experience building and deploying sophisticated machine learning solutions, with deep experience in agentic systems, NLP, or deep learning.
Demonstrated success architecting scalable data pipelines and ML platforms that support highvolume model training and inference.
Expertlevel proficiency in Python ecosystem (scikitlearn, TensorFlow, PyTorch, Hugging Face) for both research and production systems.
Handson experience with RAG architectures, model finetuning, RLHF, comprehensive evaluation frameworks, and drift detection systems.
Advanced SQL skills and expertise in data warehousing, ETL processes, and data governance best practices.
Deep understanding of database architectures and their tradeoffs, plus experience with cloud platforms (AWS, GCP, Azure) and distributed computing (Spark, Dask).
Exceptional ability to identify highimpact AI opportunities and translate them into technical solutions that drive significant business value.
Outstanding skill in translating complex technical concepts into clear business strategies and actionable insights, influencing stakeholders and driving adoption of our AI solutions.
Experience mentoring and developing junior data scientists in a collaborative, highimpact environment.
Appreciation for the unique challenges SMBs face in adopting AI, with passion for democratizing access to advanced technology.

Why this role matters:
Youll be joining a small, highimpact team where your work directly empowers thousands of SMBs to compete with enterpriselevel marketing sophistication. Our flat hierarchy means your ideas shape our product direction, and our focus on agentic AI puts you at the forefront of one of the most exciting areas in machine learning. This isnt just about building models—its about democratizing AI and creating lasting impact for businesses that form the backbone of the world’s economy.
About ActiveCampaign:ActiveCampaign is an AIfirst, endtoend marketing platform for people at the heart of the action. It empowers teams to automate their campaigns with AI agents that imagine, activate, and validate–freeing them from stepbystep workflows and unlocking limitless ways to orchestrate their marketing.

With AI, goalbased automation, and 950+ app integrations, agencies, marketers, and owners can build crosschannel campaigns in minutes–finetuned with billions of data points to drive real results for their unique business.

ActiveCampaign is the trusted choice to help businesses unlock a new world of boundless opportunities–where ideas become impact and potential turns into real results.

As a global multicultural company, we are proud of our inclusive culture which embraces diverse voices, backgrounds, and perspectives. We don’t just celebrate our differences, we believe our diversity is what empowers our innovation and success. You can find out more about our DEI initiatives here .

Perks and benefits:At ActiveCampaign, we prioritize employees’ wellbeing and professional growth by cultivating a culture centered on collaboration and innovation. When you join our team, you’ll not only have the opportunity to make a significant impact, but also enjoy a range of benefits tailored to support your personal and career development.

Comprehensive health and wellness benefits that includes a High Deductible Health Plan (HDHP) fully covered by ActiveCampaign, complimentary access to telehealth and telemental health resources, and a complimentary membership to Calm
Open paid time off
Generous 401(k) matching program with immediate vesting
Quarterly Path Perks with options for commuter and lunch benefits (for those reporting to a Hub), or a remote home office stipend
Access to professional development resources through LinkedIn Learning
After five years of service, you’ll be eligible for a fourweek paid sabbatical leave and a sabbatical leave bonus

ActiveCampaign is an equal opportunity employer. We recruit, hire, pay, grow and promote no matter of gender, race, color, sexual orientation, religion, age, protected veteran status, physical and mental abilities, or any other identities protected by law.

Our Employee Resource Groups (ERGs) strive to foster a diverse inclusive environment by supporting each other, building a strong sense of belonging, and creating opportunities for mentorship and professional growth for their members.

Principal AI Engineer

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