Senior Software Engineer

About Kenna

Kenna® is an enterprise-grade merchandise, technology, and operations partner for the worlds most recognized brands. We build iconic merchandise experiences by connecting culture, innovation, and collaboration with e-commerce, digital enablement, data intelligence, and operational infrastructure on a global scale. The best products don’t just represent a brand — they become a platform for storytelling, engagement, acquisition, revenue, and loyalty.

Every detail matters.

Summary

Were looking for a Senior Software Engineer to join our engineering team and take ownership of complex, high-impact projects across the stack. Youll design and build scalable backend services in Node.js on GCP Cloud Run, with MongoDB as the primary datastore, while also contributing to front-end experiences built with React and React Router. As a senior member of the team, youll be expected to write high-quality, maintainable code, make sound architectural decisions, mentor other engineers, and help set technical direction — all while balancing security, performance, and scalability as first-class concerns. This role touches everything from API integration work and UI component development to CI/CD collaboration and secure coding practices.

Responsibilities

• Design, build, and maintain Node.js microservices deployed on GCP Cloud Run
• Build and integrate REST APIs across a variety of sources — including our own services, third-party platforms, and client-specific APIs
• Model and query data in MongoDB, with an eye toward performance and scalability
• Build reusable, well-structured React UI components and maintain front-end features using React Router
• Write and maintain unit tests for new and existing code, and help establish code coverage standards as part of our CI/CD pipeline
• Design services with security and scalability as first-class concerns (authentication, authorization, input validation, rate limiting, secrets management, horizontal scaling)
• Write secure code by default, following best practices for dependency and vulnerability management
• Collaborate on CI/CD workflows and vulnerability management processes
• Support integrations with third-party platforms and vendors (e.g., Shopify Admin/Flow/GraphQL APIs, fraud/identity verification services)
• Participate in load and performance testing (e.g., k6, Grafana) to validate services under scale
• Work with Cloudflare, including Cloudflare Workers, for edge compute and request handling where applicable

Requirements

• Professional experience building backend services in Node.js
• Experience with MongoDB (schema design, indexing, performance tuning)
• Hands-on experience with GCP or a comparable cloud provider
• Solid understanding of REST API design and integration
• Front-end experience with React, including building UI components and working with React Router
• Strong unit testing habits and experience with testing frameworks
• Demonstrated ability to design for scalability and security (authentication, authorization, input validation, secure secrets handling)
• Comfortable working across the stack and collaborating with cross-functional teams

Nice to Have

• Experience with Cloudflare, especially building or maintaining Cloudflare Workers
• Experience building or maintaining Shopify apps, Shopify Flow workflows, or Shopify Admin/GraphQL integrations
• Experience with load/performance testing tools (k6, Grafana)
• Experience with SSO implementations (e.g., Multipass-style authentication)
• Experience with CI/CD pipeline design and maintenance