Frontend Engineer - High-Performance Payments UI (Remote)

SLAMcore; Madrid; Presencial; EUR 60.000 - 85.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Remote work

Hybrid as we grow

Learning & growth

Descripción de la vacante

APEXX is a global payment orchestration platform. We are seeking a Frontend Engineer to build lightweight JavaScript/TypeScript SDKs and sophisticated merchant dashboards for our payments platform.

You will deliver high-performance, accessible web experiences across checkout components and enterprise applications, while ensuring security and scalable frontend architecture. You will work remotely initially, with a plan to transition to a hybrid setup as our regional presence grows.

Formación

• Proven track record as a Frontend Engineer building high-performance web apps.
• Deep knowledge of JavaScript/TypeScript, HTML, CSS, and browser APIs.
• Strong experience with modern frontend frameworks, preferably React.
• Experience building data-intensive UIs and visualisations.
• Attention to detail and visual craftsmanship, accessible interfaces.
• Understanding of browser security fundamentals and WCAG compliance.

Responsabilidades

• Design, build, and maintain lightweight, high-performance JavaScript/TypeScript SDKs and payment components.
• Develop merchant and internal web apps with polished, responsive experiences across complex workflows.
• Raise the bar for frontend engineering and visual craftsmanship across browsers and devices.
• Collaborate across frontend and backend boundaries, understanding services and data flows.
• Engineer for quality with automated testing, performance tuning, observability, and debugging.
• Version, document, and publish client libraries with semantic versioning and clear integration guidance.
• Collaborate with Product, Design, and Engineering to evolve frontend architecture and practices.

Conocimientos

JavaScript/TypeScript

React

HTML/CSS

Web accessibility

Performance optimisation

Security fundamentals

Descripción del empleo

APEXX is a global payment orchestration platform. We are seeking a Frontend Engineer to build lightweight JavaScript/TypeScript SDKs and sophisticated merchant dashboards for our payments platform.

You will deliver high-performance, accessible web experiences across checkout components and enterprise applications, while ensuring security and scalable frontend architecture. You will work remotely initially, with a plan to transition to a hybrid setup as our regional presence grows.