Senior Frontend Engineer - Payments Checkout (Mobile-first)

Aghanim, Inc.; Lisboa; On-site; EUR 70,000 - 100,000; Full time

Benefits offered by this job

World-class team

Autonomy and ownership

Equity

Modern tools and AI-enabled workflows

Job summary

Aghanim, Inc. is seeking a Senior Frontend Engineer to join the payments team and help build and evolve the Checkout experience for a global audience.

You will craft a fast, mobile-first interface that works across browsers, WebViews, and in-app browsers, including on low-end devices and slow networks. Ideal candidates have 5+ years of frontend development with TypeScript and React, strong knowledge of browser performance, and experience with payment flows and transactional experiences.

Qualifications

• 5+ years of professional frontend development experience with strong TypeScript and React skills.
• Strong understanding of browsers, networking, and mobile web.
• Experience improving web performance, including FCP, LCP, profiling, bundle size, and resource loading.
• Experience building payment or other transactional flows, such as checkout, subscriptions, wallets, or payment SDK integrations.
• Strong debugging skills and ability to investigate problems beyond the frontend layer.
• Ability to own your work from implementation and release to stable operation in production.

Responsibilities

• Build and improve Checkout: add new payment flows, payment methods, and third-party SDK integrations.
• Build a fast, simple, mobile-first interface that works well across browsers, WebViews, and in-app browsers, including on low-end devices and slow networks.
• Improve Checkout performance and stability by finding bottlenecks and fixing issues in key user flows.
• Use product data and experiments to find friction in the Checkout funnel, test ideas, and improve conversion.
• Investigate production issues using logs, traces, product events, and metrics, and work with APIs and backend services when needed.
• Take part in technical decisions and code reviews and help maintain frontend code quality.

Skills

TypeScript

React

Frontend development

Web performance

Debugging

Mobile web

Payment flows

Tools

Go

Python

Job description

Aghanim, Inc. is seeking a Senior Frontend Engineer to join the payments team and help build and evolve the Checkout experience for a global audience.

You will craft a fast, mobile-first interface that works across browsers, WebViews, and in-app browsers, including on low-end devices and slow networks. Ideal candidates have 5+ years of frontend development with TypeScript and React, strong knowledge of browser performance, and experience with payment flows and transactional experiences.