Senior Frontend Engineer

Role Overview

• Lead the design, development, and implementation of responsive and scalable web features for the Business Account portal using React, Next.js, TypeScript, and GraphQL.
• Collaborate deeply with product and design teams to understand the needs of our merchant users and translate complex financial workflows (transfers, scheduled payments, account management, SCA flows) into intuitive and secure user interfaces.
• Build data-rich UIs that handle transaction feeds, account balances, statements, and multi-currency views, ensuring high performance and responsiveness, leveraging TypeScript for robust type checking and improved code quality.
• Implement secure web flows, including Strong Customer Authentication (SCA) for sensitive banking operations such as transfers, account access, and payment approvals.
• Write clean, maintainable, and efficient code, ensuring the reliability and security of mission-critical banking features with a focus on type-safe development practices.
• Actively participate in code reviews, providing constructive feedback to peers and helping establish web engineering best practices within a team that has historically been mobile-focused.
• Identify and address performance bottlenecks and bugs, ensuring a smooth and uninterrupted experience for our merchants.
• Contribute to achieving web feature parity with the mobile app and drive web-first features such as payments, bulk operations, and administrative tooling.
• Support the expansion of the Business Account to new European markets by ensuring web experiences are localised and compliant with market-specific requirements.
• Stay up-to-date with the latest frontend technologies, trends, and best practices, applying them to enhance our merchant-facing web platform.

Requirements

• 5+ years of professional experience in frontend/web development.
• Expert-level proficiency in TypeScript, including advanced type manipulation, generics, and understanding of complex type inference.
• Strong proficiency in React.js and its core principles, developed with a type-safe approach.
• Extensive experience with Next.js for server-side rendering, static site generation, and API routes, with a focus on TypeScript integration.
• Solid understanding of modern JavaScript (ES6+), HTML5, and CSS3.
• Experience with state management libraries (e.g., Redux, Context API, Zustand) in a TypeScript environment.
• Strong experience consuming GraphQL APIs (e.g., Apollo Client), with an understanding of how to define and use types for API responses.
• Strong understanding of web performance optimisation techniques.
• Experience with version control systems (e.g., Git).
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration abilities, especially when working within cross-functional teams spanning product, design, backend, and mobile engineering.

Tech Stack

• Apollo
• GraphQL
• JavaScript
• Next.js
• React
• Redux
• TypeScript

Benefits

• Health Insurance
• Meal Allowance
• 25 days of Annual leave (+ Bank holidays)
• Public Transportation Card
• Frequent team events & activities in the office and outside
• Office snacks every day
• Friendly, comfortable and informal office environment.