Senior Software Engineer, Cash App Banking
Senior Software Engineer building and enhancing the backend tax engine for Cash App Taxes. Translate complex tax rules into scalable, reliable software; collaborate with tax experts and cross-functional teams; mentor others and apply AI-first practices. Requires 6+ years backend experience and strong system design skills.
About the job
You Will
- Design, build, and own high-quality features and systems that power the Cash App Taxes filing experience, from federal and state form logic to e-file submission.
- Translate complex tax rules and requirements into clean, maintainable, and well-tested code in close partnership with Tax Product Specialists.
- Build tools and guardrails that enable non-technical contributors to make code changes safely that maintain our quality standards.
- Drive architectural and design decisions, ensuring our tax software remains scalable, secure, and maintainable.
- Write reliable, well-tested code and establish best practices for coding, testing, deployment, and documentation.
- Collaborate cross-functionally with Quality Assurance, Tax Product Specialists, Cloud Platform, Design, Product, Customer Care, and other teams to deliver cohesive solutions.
- Proactively identify and resolve issues related to accuracy, reliability, and performance, balancing new feature development with ongoing maintenance.
- Mentor teammates through code reviews, technical discussions, and knowledge sharing, fostering a culture of continuous improvement.
- Stay informed about emerging technologies and industry best practices to continually refine our development processes.
- Apply an AI-first mindset in your everyday work, raising the bar of AI application on our team.
You Have
- 6+ years of professional software development experience, preferably in a fast-paced or product-centric environment. Experience in the tax industry is a major plus.
- 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.
- Excellent communication skills with the ability to collaborate effectively with both technical and non-technical stakeholders.
- Strong problem-solving skills with 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).
- Passion for building innovative software that simplifies complicated processes for everyday users.
Technologies We Use and Teach
- Java / Kotlin
- iBatis / SQL Relational Databases
- Logging & monitoring tools — Datadog, Splunk, New Relic
- GCP / AWS
- GitHub
- HTTP, JSON, gRPC, Protocol Buffers
- Okta
- Linear
- AI Coding Agents (Claude, Codex, etc.)
Skills
Java, Kotlin, SQL, Ibatis, Datadog, Splunk, New Relic, GCP, AWS, gRPC, Protocol Buffers, GitHub
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