Buffer - Senior Growth Engineer
Requirements
• You have strong frontend foundations in React, TypeScript, and modern web development, and you're comfortable going beyond the frontend when the work calls for it - writing backend logic, building API routes, connecting third-party integrations. Our site runs on Next.js, but we care more about your adaptability than matching our exact stack. • You understand what it takes to grow something. Maybe you've worked on a marketing or growth team and have hands-on experience with SEO, analytics, A/B testing, and conversion optimization. Or maybe you've grown your own product, startup, or side project and learned these things by doing - building referral systems, running experiments, and figuring out what converts and why. Either way, you know how to measure impact and you're motivated by the numbers moving. • You think beyond the immediate task. You care about how things connect, whether they'll hold up, and whether the details are right - but you also know when to ship and learn from real usage rather than polish indefinitely. • You thrive in remote, async environments. You communicate clearly, support your teammates, and don't wait for permission to make progress. You work effectively across marketing, design, and engineering, and can explain technical decisions to non-technical stakeholders. • You've built AI into user-facing marketing features at scale and you use AI tools daily to multiply your own output — we want someone who shares our energy about what AI makes possible. • We use Next.js v15+ with React and TypeScript for buffer.com (currently using Pages router, planning to migrate to App router). We use Express middleware for some routing (planning to migrate to Next.js middleware). • Styling with CSS Modules and Motion for animations, and use Radix UI and Base UI for accessible components (gradually migrating to Base UI as it evolves) and data visualizations using Recharts. • Our marketing technology stack includes Segment, Google Tag Manager, Mixpanel, and BigQuery for tracking and analytics. • We pull content and data from Ghost CMS (blog), Redash, Notion, Google Sheets, and various external APIs. • By submitting the application, you consent to Buffer collecting and processing your personal data for recruiting purposes, find more details in our Privacy Policy.
Responsibilities
• Own growth engineering projects end-to-end, from implementing a localization framework for international audiences to building referral program logic, attribution systems, and rebuilding tracking infrastructure for accuracy and reliability. You'll take projects from concept to launch, partnering closely with marketing, design, and other engineers along the way. • Build features on Buffer's marketing site that help people discover and try Buffer, shipping landing pages, interactive tools, and conversion flows. Create benchmarks, calculators, and utility content that educate users and make Buffer genuinely useful before someone even signs up. • Shape our marketing platform capabilities by building the systems and frameworks that help the whole team move faster. Create A/B testing infrastructure, develop programmatic page generation for SEO and AEO, implement content management patterns, and build reusable components that make future projects easier to ship. • Drive experimentation and optimization, helping the team learn faster through code. Set up experiments, validate results, and iterate based on what we discover. You'll balance moving quickly with maintaining quality, because both matter here. • Strengthen our foundations by maintaining integrations with our marketing technology stack (Segment, GTM, Mixpanel, BigQuery), upgrading dependencies, optimizing performance, and ensuring accessibility. You'll also participate in our on-call rotation and contribute to ongoing system health, because keeping buffer.com running smoothly is a shared responsibility we all take seriously. • Help shape our engineering culture by pairing with other engineers, reviewing code, sharing knowledge about growth systems and marketing engineering patterns, and raising the bar for how we approach frontend work together at Buffer.
Benefits
• Salary Range $156.5K – $202.3K • Offers Equity • We strive for Buffer’s approach to salary, equity, and benefits to be transparent, fair, simple and generous. Read more about our compensation philosophy and approach here. • Upload your resume here to autofill key application fields. • Drop your resume here! • Parsing your resume. Autofilling key fields... • or drag and drop here • What excites you about Buffer's mission and the kind of work we do? How do you see yourself contributing to it in this role? • What problem did it solve, and how did you approach building it? Please include context about your role, the technologies used, and any measurable impact or lessons learned. • Explore this from any angle you like — SEO, conversion, experimentation, tracking, programmatic content, or growth infrastructure. What would you test, build, or optimize next? • What happened, and how did you handle it? What did you learn from it? • It can be technical, creative, or even personal — anything you found fascinating and can explain clearly. Use Loom or any other tool you prefer.
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