Senior Software Engineer

About Kenna

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Kenna® is an enterprise-grade merchandise, technology, and operations partner for the world's 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.

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Every detail matters.

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Summary

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We're looking for a Senior Software Engineer to join our engineering team and take ownership of complex, high-impact projects across the stack. You'll 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, you'll 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.

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Responsibilities

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

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

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