Senior Frontend Engineer (React / TypeScript)

PaymentIQ; Hoofddorp; Hybrid; EUR 95,000 - 130,000; Full time

Benefits offered by this job

Hybrid working model

Competitive compensation

AI tooling stack access

Ownership of meaningful work

Collaboration culture

Job summary

PaymentIQ is seeking a senior frontend engineer who will take ownership of complex, user-facing surfaces and help shape the next generation of our SaaS platform. You will focus on clean, maintainable code, performance, and a high-quality user experience.

You’ll work on the PaymentIQ product across checkout, hosted fields, and back-office surfaces, collaborating closely with product, design, and backend engineers. We support an AI-driven approach and a hybrid work model with 50% in Hoofddorp.

Qualifications

• 10+ years of software development experience with a frontend focus.
• Experience building scalable frontend applications in production.
• Strong understanding of modern frontend architecture, component design, state management, build tooling, performance, and testing.
• Fluent English communication.

Responsibilities

• Design, implement, and maintain frontend features across the PaymentIQ platform, including checkout and back-office.
• Shape frontend stack architecture and promote component reuse.
• Take features from design through production, including monitoring and iterative improvement.
• Improve engineering quality, performance, and accessibility.
• Mentor junior engineers and raise the team's skill.
• Collaborate with product, design, and backend engineers to translate merchant needs into solutions.

Skills

Frontend development

Frontend architecture

Mentorship

Performance optimization

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.