Senior Web Developer (React)

TL;DR

Senior Web Developer (React): Building and optimizing core checkout payment infrastructure with an accent on SDK development, performance, and cross-platform integration. Focus on designing reusable web components, implementing high-availability transactional logic, and leveraging AI-assisted development workflows to ensure seamless merchant integration.

Location: Must be based in Europe (Netherlands, Poland, or Portugal)

Company

hirify.global is a fintech company building global payment infrastructure that enables businesses to integrate over 1,000 payment methods via a single API.

What you will do

• Integrate user-facing elements with server-side logic for transactional systems.
• Design and implement high-availability, low-latency web applications and SDKs.
• Create a design system and reusable web components for third-party applications.
• Optimize bundle size, tree-shaking, and build performance for SDK distribution.
• Collaborate with backend and mobile teams to ensure SDK consistency.
• Maintain automated pipelines for publishing and versioning SDK releases.

Requirements

• 6+ years of total software development experience.
• 3+ years of professional experience using React.
• Advanced English proficiency (C1).
• Strong knowledge of JavaScript, TypeScript, Node, CSS, Git, and NPM.
• Experience with unit testing, E2E testing, and CI/CD pipelines.
• Experience using AI-assisted development tools (e.g., Cursor, Copilot) in the software lifecycle.

Nice to have

• Experience in the payment industry or integrating Payment Service Providers.
• Knowledge of backend languages.
• Experience building custom workflows using AI agents or engineering automation platforms.

Culture & Benefits

• Competitive compensation package with stock options.
• Fully remote work environment with a home office setup bonus.
• International health plan coverage.
• Flexible days off policy.
• Access to modern development tools and AI-driven engineering practices.