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# Senior/Staff Backend Engineer

- **Company:** Recruiting from Scratch
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Salary:** $200,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, Android Software Development, Apple IOS, Applications Architecture, Databases, Database Queries, Software Debugging, Payment Systems, Python (Programming Language), PostgreSQL, Redis, Software Engineering, Web Applications, Caching, Backend, Fastapi, Api Design, Restful APIs
- **Published:** October 27, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-staff-backend-engineer-san-francisco-ca--ed4f3ac2-56be-4c52-b26a-2e926ccb883a

## About the Role

Funding, Banking Services, Distribution Channel, Product Shipments, Application Programming Interface (API), Internet Application, iOS, REST (Representational State Transfer), Android Applications, Financial Transactions, * 5+ years of professional software engineering experience building and shipping production web applications.

 * Strong backend engineering experience with Python, Go, or Rust.
 * Particularly strong fit for engineers with production Python experience.
 * Experience designing and building APIs and backend services used by real customers.
 * Strong understanding of PostgreSQL, Redis, AWS, and modern backend infrastructure.
 * Experience designing systems where reliability, correctness, performance, and security are critical.
 * Strong software engineering fundamentals across system design, APIs, databases, debugging, and production operations.
 * Comfortable integrating with complex third-party APIs and external infrastructure providers.
 * Able to independently own technically complex systems from architecture through deployment.
 * Comfortable operating on a small, senior team with limited process or organizational overhead.
 * Interested in remaining deeply hands-on while helping establish technical standards and direction.
 * Comfortable working onsite in San Francisco.

Preferred

 * Previous experience in fintech, banking, payments, cryptocurrency, or consumer financial services.
 * Experience building systems that move or account for real money.
 * Familiarity with ledgers, payment rails, banking integrations, wallets, or financial transaction systems.
 * Strong production experience with FastAPI.
 * Experience with both Python and a systems-oriented language such as Go or Rust.
 * Full-stack engineering ability and willingness to contribute outside the backend when necessary.
 * Experience building consumer-facing products at significant scale.
 * Background at an early-stage startup or similarly high-ownership engineering environment.
 * Experience helping establish architecture and engineering standards from an early stage.
 * Interest in potentially growing into a technical lead or engineering leadership position as the organization scales.

## Description

* Build and maintain the REST APIs supporting iOS, Android, and web applications.
 * Design reliable systems responsible for handling real money, payments, and financial transactions at scale.
 * Integrate with external banking, cryptocurrency wallet, authentication, ledger, and payment-rail providers.
 * Build primarily in Python and FastAPI, with PostgreSQL and Redis supporting the core application.
 * Design and optimize data models, database queries, caching strategies, and backend application architecture.
 * Build and operate production systems on AWS.
 * Identify areas where services should be separated from the core Python application for performance or scalability.
 * Potentially introduce Go or Rust for performance-sensitive services.
 * Establish engineering standards around reliability, security, performance, and maintainability.
 * Work directly with the technical founders on architecture and long-term technical strategy.
 * Own major areas of the product and infrastructure from initial design through production.
 * Help establish the engineering foundation required to scale a global financial product.
 * Potentially grow into a backend or broader engineering leadership role as the team expands.