Senior Frontend Engineer, Growth Acquisition

Title: Senior Frontend Engineer, Growth Acquisition

Location: Bay Area, CA, United States of America

Job Description:

Req ID: R0004486

Job Details

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams — People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more — provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block.

The Role

As a Senior Frontend Engineer and one of the team's technical leads focusing on Web for Growth Acquisition, you'll help drive the strategy and vision for Acquisition, overseeing architecture, technical direction, and quality standards. You will play a pivotal leadership role—combining hands-on technical contribution with strategic influence over how the team builds scalable, performant, and impactful acquisition experiences. You'll collaborate closely with Product, Marketing, Design, and Data, contributing to shared platforms and advocating for best practices across multiple cross-functional squads.

This is a remote position, open to all US and Canada locations. 

You Will

• Lead the design, implementation, and delivery of large-scale, user-facing features across the Acquisition funnel, predominately using Svelte and Node.js.
• Own the technical direction, setting standards for scalability, accessibility, reliability, and maintainability across web initiatives.
• Define and evolve the frontend architecture for Acquisition, including design system integration, platform capabilities, and shared component libraries that enhance developer productivity and ensure consistency across the platform
• Collaborate across Marketing, Product, Design, and Data to optimize seller acquisition experiences and turn analytics insights into growth-driving features
• Guide team-level experimentation, AB testing, and conversion funnel instrumentation to help optimize seller acquisition.
• Oversee and improve frontend quality via code reviews, hands-on mentorship, and platform-wide infrastructure; champion high standards for technical excellence and documentation.
• Participate and lead incident response, root cause analysis, and operational improvements to drive reliability and observability.
• Explore and apply emerging technologies—such as AI-assisted engineering tools—to boost team velocity and product impact.
• Mentor and coach junior and mid-level engineers, supporting their growth and ensuring a healthy engineering culture.
• Foster a culture of inclusion, psychological safety, and high performance within the team. 

You Have

• 8+ years of professional experience with JavaScript/TypeScript and modern web frameworks (e.g., Svelte, React).
• Expertise in designing and operating large-scale web applications and reusable component systems.
• Proven experience leading complex projects and driving technical strategy and collaboration across cross-functional teams.
• Deep knowledge of frontend performance, accessibility, observability, and operational excellence.
• Strong development and leadership skills in component-driven architecture and design-system tooling.
• Advanced communication skills and experience fostering collaboration in fast-paced environments.
• Familiarity with frontend deployment pipelines, cloud infrastructure, and CI/CD practices.
• Awareness of experimentation platforms (e.g., Optimizely, LaunchDarkly), A/B testing, and data-driven product optimization.
• Comfortable with modern tooling: TypeScript, JavaScript, Svelte, React, Node.js, GraphQL, REST/gRPC, Storybook, Datadog, Sentry, Vite.
• Curiosity for emerging technologies and a pragmatic approach to innovation. 

Even Better

• Experience in SaaS or subscription-based, acquisition-focused products, with a focus on funnel optimization and growth engineering. 
• Experience building and evolving shared UI libraries, frameworks, or platform-wide components.
• Familiarity with data analysis, advanced SQL, and translating experimentation results into engineering outcomes.
• Prior leadership in web platform or infrastructure projects supporting multiple cross functional teams.
• Prior experience working with web platforms backed by 3rd party CMS.

Technologies We Use and Teach

• TypeScript, JavaScript, Svelte, React, Node.js, GraphQL, REST/gRPC, Storybook, Datadog, Sentry, Vite

We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class. We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and “fair chance” ordinances.

We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible. Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page.

 

Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

To find a location’s zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. 

 

Zone A:

$217,800—$326,800 USD

Zone B:

$207,000—$310,400 USD

Zone C:

$196,100—$294,100 USD

Zone D:

$185,200—$277,800 USD

Use of AI in Our Hiring Process

We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws. 

Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want. Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering. Check out our other benefits at Block.

Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we’re helping build a financial system that is open to everyone.