Senior Software Engineer, Growth

Are you a software engineer who is passionate about seeing your code directly translate into business success? Are you driven to solve technical problems that have a tangible impact on revenue?
ActiveCampaign is seeking a Senior Software Engineer to join our Growth Team. You won’t just be writing code – you'll be at the forefront of our business strategy, running experiments and implementing features that directly influence our revenue growth. You will be a key member of a cross-functional team focused on high-impact initiatives, including customer purchase and upgrade flows and billing management. This is your opportunity to work on a highly visible, business-outcomes-focused team and see your contributions shape our company's trajectory.

On a typical day, you might:

• Design and build new features and capabilities, producing high-quality, tested code that directly supports revenue growth strategies.
• Collaborate cross-functionally with your team and others to build services and APIs that enable feature work across our engineering organization.
• Troubleshoot and debug complex, large-scale systems to ensure a seamless experience for our 100K+ users.
• Optimize production systems by measuring performance, validating designs, and building load testing tools.
• Mentor junior engineers, participating in code reviews to provide helpful feedback and elevate the team's skills.
• Own the design and implementation of critical projects involving multiple engineers.
• Support both legacy and modern services in the public cloud, deploying them through CI/CD best practices.
• Participate in the team’s on-call rotation as a service owner to ensure the reliability of our critical systems.

The ideal candidate will bring:

• 5+ years of hands-on software engineering experience, preferably in a product-focused environment.A technical degree or equivalent related experience in a software engineering role.
• Proficiency in front-end languages and frameworks including JavaScript, React, JQuery, and HTML for developing responsive front ends that consume REST APIs. Familiarity with PHP is a plus.
• Experience creating test plans, writing automated test suites, or implementing automated testing frameworks, with experience in Playwright being highly valuable.
• Proven ability to work in an Agile development environment, collaborating effectively with a cross-functional team.
• A strong foundation in software engineering best practices and experience working with tools like Gitlab, Vault, and Jira.
• A genuine interest and experience in mentoring and guiding junior engineers.

About ActiveCampaign:ActiveCampaign is an AI-first, end-to-end 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 step-by-step workflows and unlocking limitless ways to orchestrate their marketing.
With AI, goal-based automation, and 950+ app integrations, agencies, marketers, and owners can build cross-channel campaigns in minutes–fine-tuned 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’ well-being 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. 
Here are some of the benefits we offer:-Comprehensive Health & Wellness: Top-tier benefits package that includes a fully-covered High Deductible Health Plan (HDHP), complimentary access to telehealth services, and a free subscription to Calm.-Growth & Development: Access to LinkedIn Learning, professional development programs, and career growth opportunities in a fast-growing organization.-Generous Paid Time Off: Recharge and take the time you need to maintain work-life balance with open PTO. -Total Rewards: Generous 401(k) matching with immediate vesting, quarterly perks with c