• Build and drive web development strategy for all frontend teams • Deliver critical improvements to our large monorepo build and deploy systems, focusing on high reliability and performance • Architect and contribute to decisions on the right platform, tools, and technologies to support consistency and reliability • Empower web engineers to leverage AI to improve delivery speed, code quality, and developer experience across all web engineers at the company. Help define Affirm’s web development AI strategy, leveraging agents and agent orchestration, to automate complex workflows. • Design, implement, and extend core platform components and functionality to enable new products and features to be built • Plan, design, and build our core platform software and systems to scale with an increasing number of users, features, business requirements, partners, and new engineers

• Design and implement secure, scalable REST APIs using Amazon API Gateway and AWS Lambda. • Develop optimize efficient code for AWS Lambda using Node.js, TypeScript. • Design, implement, and maintain complex relational database schemas. Write optimized SQL queries to support business with data analytics. • Integrate backend services with Postgres SQL Aurora. • Monitor and optimize API latency, execution time, unhandled exceptions using AWS X-Ray and CloudWatch.

• Build and release features on visitor-facing pages and conversion funnels. • Implement A/B tests cleanly and reliably, based on hypotheses provided by our Growth Specialists. • Use AI tools daily — prompt, guide, validate — and review AI-generated code with the same care as your own. • Write and maintain unit and integration tests (e.g., Capybara, Cypress). • Own critical systems in the visitor journey: maintenance, reliability, and incident response.

• Design, build, and maintain reliable microservices within a large-scale distributed architecture using Go for backend APIs and Angular for frontend applications. • Develop and maintain RESTful APIs with OpenAPI/Swagger specifications, ensuring robust service-to-service communication and integration. • Build scalable Angular UI applications and contribute to shared component libraries that support high-quality, consistent user experiences across the platform. • Work within a microservices ecosystem where each service is independently deployable, using Kubernetes/Helm for orchestration and deployment. • Implement comprehensive testing strategies using Ginkgo for Go services (unit, integration, smoke tests) and Jest/Cypress for Angular applications. • Take ownership of complex technical challenges across the full stack, making architectural decisions that span multiple microservices, and contribute to the full software lifecycle — from sprint planning and ticket refinement to implementation, peer reviews, and demos. • Drive technical initiatives and influence technical direction across the platform, evaluating tradeoffs and introducing improvements that benefit multiple teams. • Use AI as a force multiplier. Experiment with LLMs, agentic tools, and AI-integrated features to accelerate development, streamline workflows, and create smarter user experiences. • Embrace change as a catalyst for continuous improvement and team efficiency. • Work closely with product managers, designers, QA engineers, and other developers to build intuitive features that meet user needs and align with our mission. • Lead and mentor junior and mid-level engineers through thoughtful code reviews, knowledge sharing, and technical guidance. Model best practices and contribute to a collaborative, inclusive engineering culture.