Senior Web Engineer

Summary

Join MoneyLion's Credit Cards team as a Senior Web Engineer and contribute to the development and deployment of high-performing web applications for our credit card marketplace. You will be responsible for designing and delivering significant features and architectural projects, focusing on predictability, performance, and clean architecture. Collaborate with product managers, designers, and other engineers to define requirements and build robust solutions. Enhance shared codebases and services for scalability and high availability. A strong understanding of the browser, forms, HTML semantics, and accessible interfaces is essential. You will also mentor and support junior engineers. MoneyLion offers a competitive salary and benefits package, including comprehensive insurance, wellness perks, paid parental leave, generous PTO, and learning and development resources.

Requirements

• 6+ years of software engineering experience, with a proven track record of shipping user-facing web applications
• Deep expertise in React and TypeScript , including advanced typing strategies and component design patterns
• Strong understanding of how the browser works—particularly around HTML forms, navigation, accessibility, and performance
• Experience implementing testing strategies that balance unit, integration, and end-to-end coverage
• Comfort integrating with REST APIs and working across the full data flow, from API response to rendered UI
• Experience with CI/CD pipelines, automated testing, and feature monitoring
• Excellent collaboration and communication skills, with a bias toward clear, intentional engineering

Responsibilities

• Contribute to the development and deployment of performant, user-facing web applications that help consumers discover and compare credit card offers
• Build modular, testable UI using Next.js 15 (App Router, Server Components, React Suspense) and React 19 , prioritizing separation between UI rendering, business logic, and side effects
• Work with product and design to implement features that are accessible, responsive, and aligned with business goals
• Design and enforce boundaries between UI and domain logic—keeping components “dumb” and moving logic to framework-agnostic layers where possible
• Develop and maintain comprehensive test coverage using tools like Playwright or Cypress to enable safe iteration and deployment
• Instrument and monitor features using DataDog and other telemetry tools to ensure system health and observability in production
• Participate in design and code reviews with a focus on architectural clarity, long-term maintainability, and developer experience
• Mentor and support engineers through pair programming, documentation, and thoughtful feedback

Preferred Qualifications

• Experience with AWS and Kubernetes
• Familiarity with Playwright , Cypress , or similar E2E testing tools
• Experience with MUI or other design systems
• Passion for performance optimization and Core Web Vitals
• Experience with DataDog tracing and observability
• Strong appreciation for functional programming principles , immutability , and code predictability
• A distaste for side-effect-heavy logic embedded in UI components

Benefits

• Competitive salary packages
• Comprehensive medical, dental, vision and life insurance benefits
• Wellness perks
• Paid parental leave
• Generous Paid Time Off
• Learning and Development resources
• Flexible working hours