Senior Server Engineer, E-commerce

Proto is accelerating the world's transition to an open economy with products that increase access and independence for everyone. We're building Bitkey, a simple and safe self-custody bitcoin wallet that will put customers in control, as well as hardware and software that will help decentralize bitcoin mining and enable new and innovative use cases for bitcoin mining. We're developing these products in the open - you can read more about them at bitkey.build and mining.build. Within Proto, our Bitcoin Products team delivers the product and go-to-market strategy, software, firmware, and custom silicon needed to make Bitkey and our ambitious mining initiatives a reality. Come build the future of money with us!
The RoleAs a Senior Server Engineer, you will be responsible for designing and building the backend infrastructure for the bitcoin products e-commerce platform, powering the sale of our bitcoin hardware wallet, Bitkey, as well as our mining hardware. Working closely with product and logistics teams, you'll deliver a fast, secure, and scalable e-commerce experience.
You Will

• Architect and implement robust server-side solutions for the e-commerce platform, ensuring optimal performance and scalability.
• Design, build, and maintain APIs that support both traditional e-commerce sales as well as sales-driven workflows.
• Collaborate with front-end engineers using TypeScript, React, and Next.js to ensure seamless API integration.
• Ensure security best practices are in place, particularly for handling sensitive financial and customer data.
• Take ownership of build automation and deployment pipelines, ensuring reliable, scalable, and efficient deployment processes.
• Troubleshoot and optimize server-side code, database interactions, and third-party integrations for performance.
• Mentor junior engineers and participate in code reviews.

You Have

• 8+ years of experience as a back-end or full-stack engineer, with a focus on building and scaling web applications.
• Strong experience with server-side languages like Node.js, Python, or Go, and proficiency in cloud platforms (AWS, GCP, or Azure).
• Proven experience in designing and implementing build automation and managing deployment pipelines for web applications.
• Expertise in designing and implementing APIs for both e-commerce and workflow-driven applications.
• Strong understanding of database technologies and distributed systems.
• Familiarity with front-end technologies such as TypeScript, React, and Next.js to support seamless API integration.

Nice to Have

• Experience with blockchain technologies and cryptocurrency.
• Experience with localization of carts, payments, etc
• Experience with risk, compliance, IAM, or product security

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 also consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis.
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 will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.
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:
$198,000 - $297,000 USD
Zone B:
$188,100 - $282,100 USD
Zone C:
$178,200 - $267,400 USD
Zone D:
$168,300 - $252,500 USD
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. Check out benefits at Block.
Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, and TIDAL, 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.