Senior Backend Engineer

Rainbow is a fully digital insurance company focused on small businesses. Founded in early 2022, we have experienced massive growth over the last year—over 3x revenue growth, expanded offerings, and a successful Series A from leading investors in the space.

We develop our own unique insurance products from the ground up, combining innovative solutions with software that automates the process of getting covered and filing claims. In addition, we empower business owners with tools to help them operate with reduced risk. Our insurance service has been live for 2 and a half years, and we are already one of the largest insurers of restaurants in the country, with plans to expand into other other insurance niches.

At Rainbow, we are committed to building a world-class product and engineering culture in the Bay Area. While we trust our team to excel independently, we encourage in-person collaboration a few days per week to foster team building and a strong culture.

What You’ll Do

As a Senior Backend Engineer, you will:

• Build Core Services: Contribute to backend systems that power quoting, underwriting, claims, and policy management—focusing on scalability, maintainability, and resilience.
• Drive Performance & Reliability: Optimize performance-critical services, ensure system reliability, and contribute to infrastructure that supports high availability and security.
• Improve Developer Productivity: Build and maintain internal platforms, tooling, and CI/CD pipelines that enable teams to deploy, test, and operate services efficiently.
• Work Across Teams: Collaborate closely with product and insurance teams to deliver end-to-end solutions that meet real customer and business needs.
• Build With Quality: Write well-structured, well-tested code, and help maintain a strong engineering culture of code quality, testing, and documentation.
• Mentor & Guide: Provide technical guidance and mentorship to teammates, fostering best practices and helping level up the backend discipline.
• Tackle Business Complexity: Break down complex insurance logic into elegant technical solutions, working closely with stakeholders to turn ambiguity into clarity.
• Drive Reliability & Availability: Own system performance, uptime, and fault tolerance through resilient architectures, capacity planning, and proactive incident prevention.

About You

• Backend-Focused Engineer: You’ve built and maintained robust database systems in production—ideally using Go or similar language.
• Strong System Design Skills: You understand how to design services that are scalable, resilient, and easy to reason about in a distributed environment.
• Collaborative by Nature: You communicate clearly and work effectively with cross-functional teams to deliver well-rounded solutions.
• Quality-Oriented: You prioritize test coverage, maintainability, and thoughtful refactoring over quick hacks.
• Experienced: You bring 5**+ years of backend development experience
  ** and have worked on systems that have scaled in production environments.

FAQ

• Work Schedule: [required] in office twice a week, Mondays and Thursdays
• Backend:
  Golang (knowledge of Go is not required)