Senior Front-end developer

---

Aanvraagnummer: 42068
Contractvorm: Detachering
Organisatie: ING Bank
Locatie: Amsterdam - Noord-Holland
Uren per week: 36 per week
Tarief: Geen maximum
Duur van de opdracht: 6,5 maanden
Regio: Noord-Holland
Startdatum: 22-06-2026
Optie tot verlenging: Mogelijk, maar nog niet bekend
Sluitingsdatum: 18-06-2026 10:00

LET OP! Reacties dienen minimaal 1 werkdag voor de sluitingsdatum binnen te zijn voor tijdige verwerking.

---

This assignment is only available on a secondment (detachment) basis. Freelancers (ZZP) are not permitted. If you are self-employed, it is possible to work on this assignment through secondment via us. Please contact us to discuss the options.

Senior Frontend Engineer – OneWeb Foundation

We are looking for an experienced Senior Frontend Engineer to temporarily backfill a key role in the OneWeb Foundation team until the end of the year.

This role requires prior experience within an Omnichannel web environment, allowing for fast onboarding and immediate contribution. You will work on maintaining and evolving shared frontend capabilities, supporting multiple product teams, and improving engineering quality and practices.

In addition to core platform work, this role will contribute to:

• AI-assisted ways of working
• Improving e2e test automation at scale

The team

You will work in a central web engineering team that supports multiple product and feature teams across the organisation.

The team focuses on:

• Shared frontend foundations and libraries
• Enabling teams to deliver efficiently and safely
• Improving performance, quality and developer experience

You’ll collaborate with engineers, architects, designers and stakeholders, and help ensure consistent, high-quality frontend delivery across teams.

Roles and responsibilities

Your primary responsibility is to ensure the stability, quality and continuous improvement of the frontend foundation.

This includes:

Frontend platform & enablement

• Maintain and improve shared frontend platform capabilities used by multiple product teams.
• Support teams with adoption, upgrades and migrations of frontend solutions.
• Help evolve layout, theming and configuration capabilities at application level.
• Act as a technical point of contact for frontend-related questions and issues.

Quality, performance & reliability

• Contribute to improving frontend performance, stability and observability.
• Support improvements in logging, monitoring and issue diagnostics.
• Identify and resolve recurring frontend quality issues impacting multiple teams.

Test automation & engineering excellence

• Improve and expand regression test automation using Playwright.
• Help define best practices for frontend test stability, coverage and maintainability.
• Strengthen CI/CD pipelines related to frontend testing and quality gates.

AI enablement

• Actively integrate AI tools into daily engineering workflows, such as coding, testing, refactoring and analysis.
• Promote and help other teams adopt AI-assisted development practices in a safe and responsible way.
• Experiment with AI use cases that improve productivity, quality and developer experience.

Team & platform enablement

• Act as a knowledge multiplier for frontend and omnichannel practices.
• Support field work to identify platform pain points and improvement opportunities.
• Contribute to a safe, inclusive and productive engineering culture.

How to succeed

We hire smart people like you for your potential. Our biggest expectation is that you’ll stay curious. Keep learning. Take on responsibility. In return, we’ll back you to develop into an even more awesome version of yourself.

Required

• Previous experience working within an Omnichannel / web frontend environment to allow fast onboarding.
• 5+ years of software development experience, with a strong focus on frontend engineering.
• Experience contributing to or maintaining shared frontend libraries or platforms.
• Practical experience using AI tools in software development.
• Strong knowledge of HTML, CSS and JavaScript.
• Solid understanding of modern frontend architectures and concepts.
• Experience with modern frameworks such as Lit, React, Vue, Angular or similar.
• Good understanding of web accessibility and performance.
• Experience with CI/CD pipelines and complex Git workflows.
• Experience working in Agile environments (Scrum and/or Kanban).
• Strong communication skills and proficiency in English.

Nice to have

• Experience improving frontend test automation strategies at scale.
• Hands-on experience with Playwright for end-to-end or regression testing.
• Experience promoting or enabling new engineering practices across teams.

• Hybrid working to blend home working for focus and office working for collaboration and co-creation
• Personal growth and challenging work with endless possibilities
• An informal working environment with innovative colleagues
• If you are designated by your lead for stand-by shifts to be available for incidents outside of your regular working hours, a stand-by compensation is awarded.

About us

With 60,000 employees and operations in approximately 40 countries, there is no shortage of opportunities for people with initiative who want to help people take a step ahead in life and in business. Do you want to work at the cutting edge of what’s possible and at the same time ensure you work with integrity and hold the customer’s interests at heart? Do you want to be surrounded by progressive, inspiring, diverse and supportive colleagues? Then there is no better place to invest your talents. Join us. Apply today.

Please note, multiple interview steps involving various business stakeholders will be part of the selection process.

Interview timeslots: 2 rounds

Technical interview slots (1 hour)

• 16th June 16:00
• 17th June 14:00
• 17th June 15:00

Meet the team slots (1 hour)

• 17th June 16:00
• 18th June 15:00
• 19th June 13:30

Additional information

When you offer a professional through your company and this professional is placed, we require information from you as the contracting party, including information related to chain liability legislation.

The purpose of this legislation is to prevent misuse in the payment of payroll taxes throughout the chain, from supplier to client.

We mitigate these risks for our clients through a blocked account. A blocked account is used to pay a portion of the invoice amount from which payroll taxes and VAT can be paid to the tax authorities.

The percentage to be deposited depends on whether your company has a certification or not, and whether your company is based in the Netherlands or abroad. The blocked account can be requested from the tax authorities.

If you cannot obtain a blocked account, you may also provide a quarterly accountant’s statement. In this statement, a certified accountant will declare the accuracy, completeness and timeliness of the payments. The costs for this statement are at your own expense.

---