Software Engineer, Front End (Proto)



Software Engineering
London, UK
Posted on Wednesday, June 26, 2024

Company Description

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.

Job Description

Proto’s mission is to accelerate the transition to a more open, equitable global economy. We believe open protocols like Bitcoin are integral to achieving that vision. The team’s first two initiatives—mining tools and a self-custody wallet, Bitkey—aim to decentralize access for builders, increase network resiliency, and make everyday use of bitcoin safe and easy. One principle across everything we do in Proto is open development – show and tell. We develop products in the open, you can read more about them at and

We are seeking a highly skilled Senior Front-End Engineer to join our team. The team spans a broad spectrum of front-end development, from foundational front-end architecture, design systems, and analytics pipelines to the building blocks that power our services and content management systems. You will work closely with your peers in design and marketing to brainstorm and implement creative solutions that align with our team goals and strategy.

You Will:

  • Bring experience and knowledge to the team and advance the web discipline at Proto.

  • Design, build, and own design systems and content management system integrations.

  • Contribute to systems and standards for our marketing platforms across all product lines within Proto (e.g., our web CMS, email marketing platforms, etc.).

  • Help define and implement our analytics and experimentation architecture.

  • Work collaboratively across multiple teams to ship remarkable solutions on a fast-paced team that operates like a startup within a larger company.

  • Evaluate and document engineering standards and patterns..


You Have:

  • BS in Computer Science or a related technical field and/or 8+ years of relevant work experience.

  • A strong depth and breadth of experience crafting and shipping holistic web applications.

  • Experience with JavaScript frameworks/libraries e.g., React, NextJS, Vue, Svelte.

  • Experience crafting fluid layouts and animations with modern frameworks/libraries e.g. CSS, Tailwind, Framer Motion, GSAP.

  • Experience implementing client side analytics.

  • An understanding of web standards, browser performance, SEO optimization, and basic UX/UI principles.

  • A history of collaboration with non-technical team members.

  • Skills to work on complex problems with any audience in verbal, visual, or written formats.

Additional Information

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 a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any legally protected class.

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, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.