Senior Front End Engineer

Keylane; Rotterdam; Hybrid; EUR 50,000 - 67,000; Full time

Benefits offered by this job

Salary €4,500–€6,000 gross/mo

8% holiday allowance

Profit sharing

Pension scheme

Travel reimbursement

Company bike leasing

24 holiday days + 7 inclusion days

Lunch provided on-site

Working from home allowance

Internet allowance

Remote work abroad up to 2 months/yr

Academy and training

Vitality program

Job summary

Keylane is seeking an experienced Senior Frontend Engineer to shape and modernise pension portals. You will own frontend work end-to-end, combining Vue.js expertise with AI-assisted development while collaborating across Agile teams.

You will lead frontend initiatives, refine engineering standards, and mentor peers. The role emphasizes reusable architecture, automated testing, and delivering performant, secure user experiences at scale.

Qualifications

• Eight+ years frontend development experience in SaaS/platform/multi-customer env.
• Strong expertise in Vue.js, TypeScript/JavaScript, HTML, CSS including Vue 3 and Composition API.
• Experience modernising frontend apps, e.g., Vue 2 to Vue 3 migrations.
• Knowledge of frontend architecture, typed models, REST APIs and automated testing.
• Design reusable, configurable components for multiple customers.
• Familiar with Nuxt, Vuetify, Vite, Storybook, Vitest, Cypress or Playwright.
• Focus on performance, accessibility, security, maintainability and UX.

Responsibilities

• Take technical ownership of frontend work from discovery to production.
• Lead frontend initiatives and influence engineering standards.
• Mentor other frontend engineers and conduct code reviews.
• Ensure usability, accessibility, performance, security, and maintainability.
• Adopt AI tools and help teams apply AI responsibly to improve productivity.

Skills

Vue.js

TypeScript

JavaScript

HTML

CSS

Vue 3

Composition API

State management (Pinia/Vuex)

REST APIs

Automated testing

AI-assisted development

Mentoring

Agile/Scrum

Tools

Nuxt

Vuetify

Vite

Storybook

Vitest

Cypress

Playwright

Job description

We are looking for a Senior Frontend Engineer to help shape, build and modernise the digital pension portals used by our customers. You will combine strong Vue.js expertise with technical leadership, effective use of AI and close collaboration across our Agile teams.

Key About Your Role

As a Senior Frontend Engineer in Plexus Digital Engagement, you take technical ownership of front-end work from early discovery and solution design through development and production. Working in a multidisciplinary Agile team with Back-end Engineers, Test Engineers, a Designer, a Business Analyst, a Product Owner, and a Development Manager, you help shape and challenge requirements and turn complex business needs into effective technical solutions.

Alongside hands-on development, you lead front-end initiatives, influence engineering standards, strengthen code reviews and mentor other front-end engineers. You ensure that solutions balance usability, accessibility, performance, security, maintainability and delivery priorities.

You help modernise our front-end landscape through reusable architecture, stronger automated testing and improved engineering practices. You use AI-assisted development tools confidently and responsibly, and help teams adopt AI in ways that improve productivity and quality.

Key About Your Team

The Plexus Digital Engagement (PDE) cluster creates and manages the online portals that pension providers use to interact with employers, advisors and participants.

We support both long-time customers using older portals and new customers adopting our modern PDE platform. Our product experts, engineers and support specialists work together to deliver secure, reliable and user-friendly digital services.

PDE is investing in modernising its platforms, including migration from Vue 2 to Vue 3 and alignment with the latest WCAG accessibility guidelines. You will join a collaborative team where ownership, quality and continuous improvement are central.

• You have at least eight years of front-end development experience, including experience within a SaaS, platform or multi-customer environment.

• You have strong expertise in Vue.js, TypeScript/JavaScript, HTML and CSS, including Vue 3, the Composition API and state management solutions such as Pinia or Vuex.

• You have experience modernising complex front-end applications, for example by leading migrations from Vue 2 to Vue 3.

• You have strong knowledge of front-end architecture, typed models, REST APIs and automated testing.

• You have experience designing reusable and configurable components that support the needs of multiple customers.

• You have experience with tools such as Nuxt, Vuetify, Vite, Storybook, Vitest, Cypress or Playwright.

• You focus on performance, scalability, accessibility, security, maintainability and intuitive user experiences.

• You can shape and challenge requirements and translate business needs into effective technical solutions.

• You can lead front-end initiatives, influence engineering standards, conduct effective code reviews and mentor other developers.

• You have strong practical experience with AI-assisted software development, including critically reviewing AI-generated code and helping teams adopt AI productively and responsibly.

• You have excellent communication, collaboration and stakeholder-management skills.

• You have a proactive, delivery-focused mindset and can take ownership and manage multiple priorities.

• You have proven experience working within Agile/Scrum teams and contribute effectively to planning, refinement and the iterative delivery of high-quality software.

A Certificate of Conduct (VOG) and reference check are part of the application process.

Each employee withinKeylanemust follow training on information security and irrespective to the role basic information security responsibilities apply.

• Starting with a monthly gross salary for a senior candidate between€4.500and€6.000based on40 hoursper week;

• 8% holiday allowance of your total gross salary;

• A profit share;

• A pension scheme, with theoptionto save extra;

• Travel reimbursement: receive a mileage allowance of €0.23 per km or an NS

• Business Card, which can also be used for personal travel;

• 24 holiday days (with theoptionto buy extra) and 7 inclusion days, which can be exchanged with fixed Dutch national holidays;

• Flexibility inworkingenvironment.As part of a hybrid working team, you will work partly from home and partly from the office.If you work in the office, a free lunch is waiting for you every day. If you work from home, you will receive a working from home allowance (€4 net per day) and internet allowance (€35 net per month);

• The possibility of working remotely from abroad for up to 2 months per year;

• The possibility to lease a bike through our bike leasing program;

• A one-year contract that, subject to satisfactory performance, will be converted into a permanent contract;

• The opportunity to develop yourself at our Academy through courses and training, both professionally and personally;

• A comprehensive vitalityofferto help you stay healthy.