Senior Frontend Engineer (React / TypeScript)

PaymentIQ; Hoofddorp; Hybrid; EUR 80,000 - 110,000; Full time

Benefits offered by this job

Hybrid work model (50% Hoofddorp)

Access to AI tooling stack

Meaningful production impact

Collaborative team culture

Job summary

PaymentIQ is seeking a senior frontend engineer to own complex, user-facing surfaces and help shape the next generation of our products. You will work on a SaaS payment orchestration platform used by hundreds of merchants worldwide, with a strong AI-first approach and a focus on performance, accessibility, and code quality.

The role emphasizes end-to-end ownership from design to production, collaboration with product and backend teams, and mentorship of junior engineers.

Qualifications

• 10+ years software development experience with a strong frontend focus
• Experience building scalable frontend applications used by many customers
• Strong understanding of modern frontend architecture, component design, state management, build tooling, performance, and testing
• Ownership mindset with ability to dive into docs, find answers, and own work
• Excellent written and spoken English
• Nice to have experience in payments/e-commerce and shared component libraries

Responsibilities

• Design, implement, and maintain frontend features across the PaymentIQ platform — checkout, hosted fields, and back-office
• Shape the frontend architecture and drive component reuse and consistency
• Own features from design through production including monitoring and iterative improvement
• Raise engineering quality, performance, and accessibility standards
• Mentor junior engineers and uplift the frontend team skills
• Collaborate with product, design, and backend engineers to translate merchant needs into solid solutions

Skills

Frontend architecture

Mentorship

Ownership

Code quality

Problem solving

English proficiency

Tools

Jest

Vitest

Playwright

Cypress

Node.js

Job description

We care less about titles and more about mindset and attitude. We're looking for a senior frontend engineer who is ready to take ownership of complex, user-facing surfaces and shape the next generation of our products. What matters most is a strong foundation, an eye for detail, and the drive to raise the bar across the team.

You’ll work on PaymentIQ, a SaaS payment orchestration platform that helps merchants centrally manage, optimise, and scale payment flows across providers and markets. Through a single integration, PaymentIQ connects merchants to more than 300 payment service providers, reducing the cost and complexity of adding new providers, supporting expansion into new markets, and enabling flexible checkout experiences. As a senior frontend engineer you’ll have a direct impact on the checkout, hosted fields, and back-office surfaces used by hundreds of merchants worldwide.

We take an AI-first approach to engineering. Every engineer gets full access to a broad range of AI capabilities and is expected to use them to move faster, raise code quality, and reduce repetitive work. AI is part of how we build — not an optional add-on.

• GitHub Copilot Enterprise: premium chat, agentic coding agents, and automated code review across the IDE (JetBrains and VS Code), GitHub.com, and the CLI.
• Frontier models on tap: the latest Claude (Opus, Sonnet, Haiku) and GPT families, selectable per task with no individual quotas to worry about.
• Coding agents: delegate larger refactors, test generation, and investigation work to autonomous agents, with human review on every PR.
• Build your own tooling: we encourage engineers to write their own scripts, agents, and MCP integrations to automate the boring parts of the job.

Key responsibilities

• Build & Ship: Design, implement, and maintain frontend features across the PaymentIQ platform — checkout, hosted fields, and back-office — with a focus on clean, maintainable code.
• Architecture & Direction: Shape the technical direction of our frontend stack, drive component reuse and consistency, and help evolve the architecture as the product grows.
• End-to-End Ownership: Take features from design through production and beyond — including monitoring, troubleshooting, and iterative improvement.
• Quality First: Contribute to code reviews, and help raise the bar for engineering quality, performance, and accessibility across the team.
• Mentorship: Coach more junior engineers, share knowledge, and lift the overall skill level of the frontend team.
• Collaboration: Work closely with product, design, and backend engineers to translate merchant needs into solid, user-friendly solutions.

Requirements

• Experience: 10+ years of software development experience, with a strong frontend focus in recent years.
• Scale: Experience building scalable frontend applications used by many customers in production.
• Architecture: Strong understanding of modern frontend architecture — component design, state management, build tooling, performance, and testing.
• Ownership: Comfortable digging into documentation, finding answers, and taking ownership of your work.
• Problem Solver: You enjoy developing software and solving hard problems with simple solutions.
• Language: Proficient in written and spoken English (work is done in English).

Nice to have

• Experience in the financial industry, payments, or e-commerce.
• Experience designing and maintaining a shared component library or design system.
• Strong eye for accessibility (WCAG) and frontend performance.
• Familiarity with modern testing tools (Jest, Vitest, Playwright, Cypress).
• Exposure to Node.js / BFF patterns or related backend integration work.

How we work

Agile Scrum: daily standups, bi-weekly planning, regular demos, technology review meetings, and monthly retrospectives. We're committed to improving our documentation and stay flexible on workflow suggestions, while actively supporting technical improvement initiatives.

• A competitive compensation package aligned with seniority and experience.
• Hybrid working model — 50% in our Hoofddorp office, the rest remote, supporting a healthy work–life balance.
• Deep, hands‑on exposure to PaymentIQ, a leading payment orchestration platform.
• Full access to a leading AI tooling stack — we invest in it because it makes our engineers better.
• Real ownership of meaningful work with production impact across hundreds of merchants and 300+ PSPs.
• A collaborative culture that values expertise, accountability, and getting things done.