Job Url: https://jobs.ashbyhq.com/givebutter/6c0e5c59-5b11-467a-9c73-d349149a247f?utm_source=Otta

Job Description: Role Description
Givebutter is looking for a Senior Full-Stack Engineer II to join our Growth Team, focusing on acquisition. You'll own experiments that directly impact our nonprofit acquisition funnel and activation rates. Working in a high-tempo experimentation culture, you'll ship fast and learn from real user behavior.

Why join Givebutter’s Engineering team?

Democracy of code – We value equal contributions from all engineers and foster an environment of open discussion on architecture and ideas.

Focus time – We keep meetings to a minimum. Engineers control their calendars and can block uninterrupted time for focused work.

Automated CI/CD – Our build and deployment processes are fully automated and hands-off, allowing engineers to focus on problem-solving through code.

Mission-driven, full stop – You’ll be working with inspiring nonprofits, charities, and organizations that are making a positive impact around the world.

Why join Growth Engineering?

Direct business impact – Your code directly impacts the number of nonprofits we help succeed.

Experimentation at scale – Run A/B tests that impact hundreds of thousands of users.

High autonomy – Join a small team with meaningful input on product and company direction.

Responsibilities

Design, build, and ship experiments that improve our key business metrics.

Collaborate with PM, Design, and Marketing to rapidly prototype and test new user experiences.

Implement robust A/B testing infrastructure and ensure rigor in experiment design.

Build full-stack features spanning React, Laravel, and data integrations.

Evaluate and apply AI and machine learning tools – such as LLMs, recommendation systems, or predictive analytics – to drive innovation in product development.

Analyze experiment results using SQL and analytics tools to derive actionable insights.

Champion growth engineering best practices while maintaining code quality and system reliability.

Perform peer code reviews, ensuring that code meets acceptance criteria, adheres to our code guidelines, and follows engineering best practices.

Contribute to growth team’s experimentation roadmap and technical strategy.

Requirements

5+ years of Engineering experience working in-house to build web applications at scale

Strong proficiency in modern JavaScript/TypeScript and React

Experience with PHP and MVC frameworks (Laravel preferred but not required)

Experience within a Growth Team focused on A/B testing, feature flags, and experimentation platforms

Comfort with SQL and data analysis to measure experiment impact

Track record of working on cross-functional teams with Product and Design

Experience debugging code and applications in production

Ability to balance speed of iteration with code quality and technical debt

Nice to have

Experience at high-growth B2B SaaS or consumer products (100k+ MAUs)

Familiarity with analytics platforms (e.g., PostHog, Amplitude, Mixpanel, Heap)

Experience with or interest in growth metrics, funnels, and conversion optimization

Background in marketing technology or conversion rate optimization

Experience with modern deployment practices and AWS infrastructure