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Block

Runs Square payments and the Cash App money app

Senior Software Engineer

Backend EngineeringConfirmed live in the last 24 hours
Full-timeSan Francisco Bay Area, CA, USA$185.2k - $326.8kIn-person

About the Job

Requirements

  • At least 6 years of professional software development experience, preferably in a fast-paced or product-centric environment.
  • Strong technical skills in backend development, including system design, architecture, and object-oriented programming.
  • A track record of delivering reliable, high-quality software solutions on schedule.
  • Ability to collaborate effectively with technical and non-technical stakeholders.
  • Strong problem-solving skills, attention to detail, and a methodical approach to debugging and implementation.
  • A Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent experience.

Responsibilities

  • Design, build, and own high-quality features and systems for the Cash App Taxes filing experience, including federal and state form logic and e-file submission.
  • Translate tax rules and requirements into clean, maintainable, well-tested code in partnership with Tax Product Specialists.
  • Build tools and guardrails that enable non-technical contributors to make code changes safely while maintaining quality standards.
  • Drive architectural and design decisions to keep tax software scalable, secure, and maintainable.
  • Write reliable, well-tested code and establish best practices for coding, testing, deployment, and documentation.
  • Collaborate with Quality Assurance, Tax Product Specialists, Cloud Platform, Design, Product, Customer Care, and other teams to deliver cohesive solutions.
  • Identify and resolve accuracy, reliability, and performance issues while balancing new feature development with ongoing maintenance.
  • Mentor teammates through code reviews, technical discussions, and knowledge sharing.
  • Stay informed about emerging technologies and industry best practices to refine development processes.
  • Apply an AI-first mindset in everyday work and raise the bar for AI application on the team.

Desired Qualifications

  • Experience in the tax industry is a major plus.

About the Company

Block

Runs Square payments and the Cash App money app

Block runs Square, which sells card readers and checkout software to businesses, and Cash App, an app people use to send, save, spend, and borrow money. Its first product, a square card reader that plugged into a phone's headphone jack in 2010, let street vendors and other small sellers accept credit cards. Square earns a fee on each card payment and charges for software, while Cash App makes money from its debit card, short-term loans, Afterpay installment plans, and bitcoin sales. Block also owns the music streaming service TIDAL and builds bitcoin hardware, including the Bitkey wallet and Proto mining rigs. Twitter co-founder Jack Dorsey co-founded the company in 2009, and its main office is in Oakland, California.

Company size
5,001-10,000
Company stage
IPO
Headquarters
Oakland, CA
Founded
2009

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