Senior Growth Engineer at Buffer

Buffer develops social media and brand-building software for small businesses, creators, and individuals. Our mission is to provide essential tools that help small businesses get off the ground and flourish. Through exceptional customer service and inspiring content, we empower our customers to believe in their success and make a positive impact along the way. Buffer is a fully distributed team, and we have always aimed to approach things differently. Since our early days, we’ve focused on building one of the most unique and fulfilling workplaces by rethinking many traditional practices. We also default to transparency, allowing you to access all our metrics, successes, and failures on our Transparency Dashboard. We are united by Buffer's values, and we hire and work from all over the world. We strive to create a diverse and inclusive work environment, building a culture where underrepresented groups are welcome and can thrive. Please note that we do travel to work together in person once or twice per year, and these events are highly encouraged to foster deeper connections among our small team. As you learn more about Buffer and consider joining our journey, feel free to read more from Kirsti and Sabreen as they share their first experiences with Buffer, as well as from Hailley, who captured why she still calls Buffer home after 8+ years.

About the Role

We're looking for a Senior Engineer to join Buffer's Growth Marketing team. This is a hands-on engineering role focused on building the web experiences, systems, and infrastructure that fuel Buffer’s growth. The work encompasses developing features and pages across buffer.com, creating interactive tools, implementing referral systems, optimizing conversion flows, and building the technical foundations behind them. This includes integrations with marketing tools, analytics and tracking systems, SEO infrastructure, and the backend logic powering our marketing features. Buffer is on a mission to help the next 200,000 creators and small teams build their brands, and this role is central to achieving that goal. You'll be responsible for building the growth systems, experiments, and infrastructure that connect people with Buffer at the opportune moment, helping them take that crucial first step. This is an opportunity to shape how we grow, not just keep pace with it. We need someone who is proficient across the full frontend scope, strong with React and modern web development, but also capable of delving into backend logic, connecting third-party APIs, debugging tracking pipelines, and proactively learning what they don't yet know. The team values pace and iteration: we ship quickly, learn from real usage, and continuously improve. However, we also prioritize craftsmanship, paying attention to UX details and maintaining high standards while sustaining momentum. Working at Buffer is collaborative and positive, underpinned by our core values. We strive to be "No Ego Doers" who are aware of our assumptions, and joining us means you’ll work collaboratively to test and validate our ideas.

Who You'll Work With

This role reports to Kateryna Porshnieva, Head of Engineering Operations, and is part of the Marketing team. You'll collaborate on a variety of Brand and Product Marketing projects with the entire Marketing team, partnering closely with Simon Heaton, Director of Growth Marketing, and Hailley Griffis, Head of Communications and Content. Your daily work will involve close interaction with most of the team, particularly Kate Baldrey, our Marketing UX Designer, to build compelling web experiences that help people discover and sign up for Buffer.

What You'll Do

• 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 enhanced accuracy and reliability. You'll take projects from concept to launch, collaborating closely with marketing, design, and other engineers throughout the process.
• Build features on Buffer's marketing site that help people discover and try Buffer, shipping engaging landing pages, interactive tools, and optimized conversion flows. Create valuable benchmarks, calculators, and utility content that educate users and make Buffer genuinely useful even before they sign up.
• Shape our marketing platform capabilities by building the systems and frameworks that empower the entire team to move faster. Create A/B testing infrastructure, develop programmatic page generation for SEO and AEO, implement content management patterns, and build reusable components that streamline future projects.
• Drive experimentation and optimization, enabling the team to learn faster through code. Set up experiments, validate results, and iterate based on discoveries. You'll balance moving quickly with maintaining quality, recognizing the importance of both.
• 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, as keeping buffer.com running smoothly is a shared responsibility.
• Help shape our engineering culture by pairing with other engineers, reviewing code, sharing knowledge about growth systems and marketing engineering patterns, and elevating the standard for how we approach frontend work collaboratively at Buffer.

Helpful Skills and Experience

• You have strong frontend foundations in React, TypeScript, and modern web development, and you're comfortable extending beyond the frontend when the work requires it-writing backend logic, building API routes, and connecting third-party integrations. Our site runs on Next.js, but we prioritize your adaptability over an exact stack match.
• You understand what it takes to grow something. Perhaps you've worked on a marketing or growth team and have hands-on experience with SEO, analytics, A/B testing, and conversion optimization. Alternatively, you may have grown your own product, startup, or side project and gained this knowledge through direct experience-building referral systems, running experiments, and understanding what converts and why. Either way, you know how to measure impact and are motivated by seeing the numbers move.
• You think beyond the immediate task. You care about how things connect, their long-term viability, and the precision of details-but you also recognize when to ship and learn from real usage rather than striving for indefinite perfection.
• You thrive in remote, asynchronous environments. You communicate clearly, support your teammates, and take initiative without waiting for permission. You collaborate effectively across marketing, design, and engineering, and can explain technical decisions to non-technical stakeholders.
• You've integrated AI into user-facing marketing features at scale and regularly use AI tools to amplify your own output-we seek individuals who share our enthusiasm for the possibilities AI creates.
• You have a personal stake in the world of content creation. Perhaps you've managed a newsletter, built an audience on social media, or regularly share your own work online. You've used Buffer before and are passionate about the experience of planning, creating, and publishing content.

Our Tech Stack

• 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 utilize 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.

Interview Process

Do you believe you're a fit for this role and want to join the Buffer team? We'd love to hear from you! Here's what our hiring process for this role is like:

1. Application. When submitting your application and resume, tell us why you want to join Buffer and take your time. This is your chance to make a strong first impression.
2. Role Interview. Chat with Simon Heaton, Director of Growth Marketing, to understand what it takes to work at Buffer. This is an opportunity for both sides to get to know each other and determine whether our expectations align.
3. Code review assignment. We'll send you an asynchronous assignment to review a pull request, to help us understand how you think about code and communicate technical ideas.
4. Technical interview. Interview with a couple of engineers from Buffer focused on your technical experience and approach.
5. Leadership Interview. A conversation with Hailley Griffis, Head of Communications and Content, to discuss your approach to leadership, how we drive value and impact in a cross-functional company, and to truly delve into how you approach work and collaboration.
6. Final Interview. You will have the opportunity to meet with our Executive Leadership team. This is a great chance for you to gain a deeper understanding of Buffer's strategy, values, and work processes.
7. Collaboration Period. This is an experimental stage where you would work with us on a real project over 2 days (fully paid). The goal is to see how it feels to work in the team, both for us and for you.
8. Offer. We conclude with an offer and discuss the final details, aligning on the last elements before officially welcoming you to the Buffer team 💛.

At Buffer, we value diversity of experience, and we understand that comes in many forms. We’re dedicated to adding new perspectives to the team. So, if your experience is close to what we’re looking for, please consider applying. By submitting the application, you consent to Buffer collecting and processing your personal data for recruiting purposes, find more details in our Privacy Policy.

Perks and Benefits

Our focus with perks and benefits is to offer everything teammates need to do their best, healthiest work and keep developing their craft.

• Competitive salary: Our salary formula adjusts to your cost of living and experience.
• Work remotely: Live and work wherever you are happiest and most productive! (Home Office Stipend)
• 4-Day workweeks: Our schedule is four workdays, with a flexible, meeting-free fifth day for overflow tasks or personal time as you see fit. (Four Day Work Week)
• Health insurance: We offer health insurance for all our team members, international or US. (Health Insurance)
• Home office setup: Get $1000 to set up your home office! (Home Office Stipend)
• Growth mindset fund: Extra money each year for learning and development. (Learning Budget)
• New laptop: Get a powerful new laptop or PC from your first day at Buffer and every 3 years after.
• Unlimited free books: Get a free Kindle and all the digital or audio books you like, no questions asked. (Learning Budget)
• AI tools stipend: Level up your work with the latest AI tools. (Learning Budget)
• Flexible time off: No set limits. Take the time you need to rest and recharge. (Unlimited PTO)
• Savings plan: With 3% company match. (401(k) / Retirement Plans)
• Profit sharing: When the company does well, all team members share the profits. (Equity/Stock Options)
• Family leave: 16 weeks of family leave for all parents, fully paid. (Paid Parental Leave)
• Family support fund: A stipend for each kiddo. (Child Care Support)
• Working smarter stipend: Extra funds for a coworking space or some coffee shop treats. (Coworking Budget)
• Sabbaticals: Take a 6-week break, fully paid, after every 5 years with Buffer. (Company Retreats)