DEPT® is a Growth Invention company built to help the world’s most ambitious brands grow faster. Operating at the intersection of technology and marketing, our 4,000+ specialists deliver growth invention services across Brand & Media, Experience, Commerce, CRM, and Technology & Data. We’re 50|50 tech and marketing, partner-led, and first to move. Clients include Google, Lufthansa, Meta, eBay, and OpenAI. We have been certified B Corp and Climate Neutral since 2021.

This role is part of our Experience & Engineering team based in the Netherlands. We combine our skills in developing future-ready technical solutions with our expertise in creating beautiful designs to deliver exceptional and engaging digital experiences that build lasting relationships with our clients like Gant, Inter Milan, bol.com and Just Eat Takeaway.

JOB PURPOSE

Looking to kick off your tech career as a frontender? Join our talent program designed to shape you into a next-level front-end developer. We’ll give you all the attention, feedback, and high fives you need to grow into a standout professional. Our goal? To help you reach your full potential.

During this internship you’ll hit the ground running as if you’re the Usain Bolt of frontend. You’ll be part of our DEPT® Campus, which is our talent program that molds you into becoming the best of the best. Through professional training, masterclasses and interactive workshops about the latest technology, this program ensures that you won’t turn into the designated coffee supplier or have to start an involuntary love affair with the printer.

From day one, you’ll be paired with a dedicated mentor/buddy for 1-on-1 coaching and join a team of 40+ passionate developers always ready to help.

Note: to be eligible for this internship, you are required to be living and studying in the Netherlands.

AS A TECHIE

• A group of tech enthusiasts that will feel like friends in no-time.
• Possibility to work with cutting-edge technologies in a constantly evolving environment. Yes, we’re on top of our game when it comes to AI.
• Good vibes: we’re trusting and believe in creative freedom and autonomy.
• Best of both worlds: the pros of an international leading agency with the energy of a local studio.
• Budget allocated for any new technology you wish to trial that benefits the company. Found the new Cursor AI Editor? Subscription costs are covered!
• A buddy and lead that you can ask anything, any time.

WHAT YOU WILL DO

• Bringing designs to life on all kinds of different devices in a multi-disciplinary team, like designers, product owners and back-enders; from a 27-inch desktop screen to a smartphone with a screen width of 320px;
• Work with HTML, SASS / Tailwind CSS, Typescript, React, Next.js, Rest API’s, Server Components, and more;
• Learn all the ins and outs of working within a digital agency, whether that is through team knowledge sharing or by taking on a cool feature;
• Work as a full-fledged and indispensable member of a project team for A-list clients such as Artis, Gall & Gall, and Inter Milan.

WHO YOU ARE

Even if you don’t tick every box, that doesn’t mean we’re not a match. If you feel like this role could be right for you, just go for it and apply!

YOU:

• Have a portfolio / GitHub that we would like to receive with your application.
• Know what A11y means, and are eager to learn more about it.
• Know how to implement semantic HTML.
• Have experience with JavaScript and basic Typescript.
• Have experience with React 
• Pre: experience with next.js
• Pre: experience with other frameworks like Vue or Svelte.
• Pre: experience with Tailwind CSS
• Know what the difference is between Server Side Rendering (SSR) and Client Side Rendering (CSR).
• Don’t run away from giving presentations about the milestones that you’ve accomplished.
• Enjoy experimenting with new technologies and keeping ahead of the curve
• Pre: Know how to responsibly leverage agentic AI in your work. studies or a personal project

Hard Requirements

• A GitHub with public repositories, or/and an online portfolio.
• You are enrolled in a Dutch university for the entire duration of the internship.
• Availability of 5 days per week (40 hours), from September 2026 for a duration of 5 months.
• You’re confident in English, whether you’re writing, presenting, or just chatting with the team.
• We offer a flexible hybrid work model. Here’s how it will work for your internship:
• Onboarding Period: To set you up for success and help you integrate with the team, we require you to work from the office daily at the start of your internship.
• Flexible Schedule: After the onboarding period, you will have the flexibility to create your own hybrid schedule.
• Team Standard: You can choose to work from home up to 3 days per week. As a team, we all aim to be in the office at least 2 days each week to collaborate and stay connected. 

WE OFFER

• DEPT® has been named a Great Place To Work in 2023 - in the Netherlands and has been a Certified B Corp® since 2021 -award winning in the best way possible.
• Awesome clients. Whether big, small, local or global — at DEPT® you’ll get the opportunity to work with all of them. And we celebrate all of our successes together!
• A monthly allowance of 450 euros + 50 euro internet allowance.
• Opportunities to develop your skills even further through training and certifications.
• Everything to focus on your health: mindfulness sessions, mental health services, healthy lunches available at the office, and above all: a safe work environment.
• Great fringe benefits; use of OV-bikes, an NS Business Card and many other goodies.

WHY DEPT®?

We are a Growth Invention company built to help the world’s most ambitious brands grow faster. Operating at the intersection of technology and marketing, we create what is next by pioneering ideas, acting fast, and moving further because standing still just is not in our DNA.

We are drawn to people who stay curious, move with intent, and never stop inventing. Our culture runs on three values: better together, relentlessly curious, and get sh*t done. It is how we work, how we grow, and how we make things that matter.

At DEPT®, you will find the freedom to explore, the space to collaborate, and the trust to make a real impact for our clients, for each other, and for the world we are helping to build.

DIVERSITY, EQUITY & INCLUSION 

At DEPT®, we take pride in creating an inclusive workplace where everyone has an equal opportunity to thrive. We actively seek to recruit, develop, nurture, and retain talented individuals from diverse backgrounds, with varying skills and perspectives.

Not sure you meet all qualifications? Apply, and let us decide! Research shows that women and members of underrepresented groups tend not to apply for jobs when they think they may not meet every requirement, when in fact they do. We believe in giving everyone a fair chance to shine.

We also encourage you to reach out to us and discuss any reasonable adjustments we can make to support you throughout the recruitment process and your time with us.

Want to know more about our dedication to diversity, equity, and inclusion? Check out our efforts here.

The Role

• You will help build Connect, our consumer-facing hosted checkout and subscription management service, and related projects to deliver the best experience for our customers and their users.
• You will bring new ideas to directly shape our app development and products beyond our established work.
• You will work with a modern tech stack using Next.js, React, TypeScript and Tailwind CSS.
• You will use your skills for Frontend and Backend technologies built on top of Next.js.
• You will take ownership of features from planning and implementing to shipping and optimizing.
• You will work closely with our UI/UX team to develop the best possible experiences for our users.
• You will help design maintainable and scalable software architectures.
• You will give feedback, ideas, and code reviews to your colleagues.
• You will collaborate with colleagues across the engineering organization through cross-functional working groups and our RFC process.

Salary range: €85k - €120k.

What We Are Looking For

• You have advanced experience building web apps using React. You are a TypeScript pro, know your way around Next.js, and can implement common and advanced React patterns. You’ve been doing this for 5+ years. Working with git is natural for you.
• You enjoy building best-in-class experiences. You know what makes apps excellent, you can give your input and are able to implement the best possible UX.
• You have built and maintained scalable apps. You love to build things for scale and have experience in designing app architectures and writing high-quality code.
• You enjoy building a product from scratch. This means high involvement in the design process and understanding what customers want and users need.
• You love learning technologies as you go. You always want to find the right tool for the job, and not only follow what you already know.
• You care about more than engineering quality. Whatever you do, needs to have a business impact. You can make trade-offs between speed and quality.
• You are an all-rounder: You're fluent with RESTful APIs, worked with Docker, GCP, GitHub Actions, Cypress, or Testing Library, and have some experience with Ruby on Rails.

Who we are

At OpenUp, our mission is to make mental well-being accessible to everyone. Following a ‘high tech & high touch’ approach, we support companies, their employees, and their families with proactive and practical mental health services. Through our digital platform, clients can access 1:1 check-ins, online courses, articles, videos, group sessions, mindfulness practices, and a team of committed mental well-being experts. As we believe that mental and physical well-being are deeply connected, we have also added Lifestyle Experts to our offering, focusing on nutrition, exercise, and sleep. We offer a truly holistic approach that helps people take ownership of their health. We’re proud to work with forward-thinking organizations and are committed to raising the bar on accessible care.

OpenUp was ranked in the Top 3 on LinkedIn’s Top Startups list for 2023, 2024 & 2025 and is continuously growing. We are expanding our international teams and we are searching for like-minded talent. We are already serving 2000+ companies (e.g. Rituals, Deloitte, Decathlon, KPMG, and McDonalds), through which 600K+ employees have access to our product.

About the role

As a full stack software developer at OpenUp you will be a key member of our tech and product team. Besides writing clean and practical code you will also mentor other team members, make key architectural decisions, assist our tech lead with hiring, collaborate with 3rd parties and most importantly work together with the team to develop our mental health platform.

Our tech stack: .NET 8, SQL Server, React, Azure

About you

OpenUp loves people. We hope you do too. You enjoy working with people and you like to work in a team. You are enthusiastic about mental health, which is a topic as normal as going to the gym. Your motto is: you can learn from setbacks and you should celebrate success! Next to that:

• You are an experienced software developer with a strong track record in contributing to innovative projects.
• You have a bachelor's degree in computer science or a similar education.
• You have 5+ years experience working with backend APIs on .Net 
• You have 2+ years experience working with React /Angular/Vue.
• You have experience with devops.
• Experience with Tailwind/shadcn and Storybook is a plus.
• You communicate well and enjoy mentoring more junior colleagues.
• You like to come up with creative yet pragmatic solutions to complex problems.
• You get positive energy from the dynamics of a scale-up environment.
• You have knowledge of application design, architecture and common design patterns.
• You have knowledge of unit/integration/E2E testing.

What you can expect

Joining OpenUp means being part of a fast-growing company that's doing something meaningful. You'll work with a diverse and international team. We like to have fun together with a lot of team building activities like our weekly ‘borrels’ and after work sport classes, the yearly ski-trip and our Padel tournament. Which makes our work fun, challenging and dynamic. Apart from this, we offer: 

• €1500 annual personal development budget
• ClassPass: OpenUp contributes towards your classpass membership 
• Monthly home internet/phone contribution (50EUR)
• Daily healthy and vegetarian lunch at our office.
• Regular office yoga, meditation classes or breathing exercises
• Flexible work model (hybrid and options for remote work).
• Monthly drinks and company wide summer fest and other fun activities.
• 27.5 vacation days per year.
• Free and unlimited access for you and your family to all our products, including our psychologists.

Next steps

Excited about this role at OpenUp? We love to learn more about you. Send us your application through our website and we will be in touch with you soon. 

At OpenUp, everyone is welcome to apply - regardless of color, age, gender, nationality or any other label. Our hiring decisions are based on indiscriminate objective measures. We embrace what makes you unique and we believe that a diverse team is crucial to success. If you are ready to OpenUp, join us!

Senior Frontend Developer (m/f/d)
Amsterdam, hybrid

DEPT® is a Growth Invention company built to help the world’s most ambitious brands grow faster. Operating at the intersection of technology and marketing, our 4,000+ specialists deliver growth invention services across Brand & Media, Experience, Commerce, CRM, and Technology & Data. We’re 50|50 tech and marketing, partner-led, and first to move. Clients include Google, Lufthansa, Meta, eBay, and OpenAI. We have been certified B Corp and Climate Neutral since 2021.

This role is part of our Experience & Engineering team based in the Netherlands. We combine our skills in developing future-ready technical solutions with our expertise in creating beautiful designs to deliver exceptional and engaging digital experiences that build lasting relationships with our clients like Gant, Inter Milan, bol.com and Just Eat Takeaway.

JOB PURPOSE

We’re looking for a Frontend Developer who thrives on translating high-fidelity designs and clear acceptance criteria into polished, performant, and accessible digital experiences. At DEPT®, your work will directly shape the frontlines of global digital platforms — where visual excellence, responsiveness, and accessibility matter. You’ll work alongside multidisciplinary teams to create frontends that meet today’s standards and tomorrow’s expectations.

KEY RESPONSIBILITIES

• Translate tickets and acceptance criteria into functional, testable components using React, Tailwind CSS, and TypeScript.
• Build interfaces from Figma designs with high visual accuracy and attention to pixel perfection.
• Develop responsive layouts and components that adapt elegantly across devices and breakpoints.
• Ensure all components are accessible and inclusive, meeting WCAG 2.2 AA compliance standards.
• Optimize UIs for Core Web Vitals (LCP, CLS, INP) and other performance metrics.
• Contribute to and maintain shared component libraries and frontend standards.
• Collaborate with designers, QA, and backend developers to validate requirements and ship features.
• Follow clean coding practices like DRY, KISS, and component reuse to keep the codebase scalable and maintainable.
• Great to have: Working knowledge of Framer Motion, GSAP, ThreeJS, or other animation frameworks

WHAT WE ARE LOOKING FOR

• 5+ years of experience building frontend applications, preferably in agency or multi-project environments.
• Fluency in React, Tailwind CSS, and TypeScript, with strong attention to detail and usability.
• High working proficiency in both Dutch and English.
• Knowledge on how to bring Figma designs to life, down to the last pixel — but know when perfection gives way to pragmatism.
• Ability to build fully responsive UIs that look and behave well on all modern devices and browsers.
• Understanding of optimisation for Core Web Vitals and real-world performance benchmarks.
• Ability to apply WCAG 2.2 AA standards — including semantic markup, keyboard accessibility, and visual contrast.
• Passion for UI quality, maintainability, and collaborating with designers and backend engineers.
• Application of clean code principles like DRY, KISS, and modularity to your work.
• Clear communication and contribution to a healthy, collaborative team dynamic.

WE OFFER

• A flexible, hybrid working policy (2-3 days from the office, depending on location) and the opportunity to work from abroad for 13 weeks a year. 
• 24 vacation days per year and the possibility to buy an unlimited number of extra vacation days.
• DEPT®/YOU Learning Menu and DEPT®/YOU Special Programs. Develop your skills with courses and programs tailored to your needs.
• Stay happy and healthy with a contribution to your health through the OpenUp platform, gym and wellness discounts, and healthy lunches at the office.
• A reputation for doing good. DEPT® has been a Certified B Corp® since 2021 and named ‘Agency of the Year’ at both The Lovies and The Webby Awards.
• Awesome clients. Whether big or small, local or global — at DEPT® you’ll get the opportunity to work with clients of all sizes and across all industries. And we celebrate all of our successes together!
• The opportunity for possibility. We want to enable you to do what you do best and help you develop your skills further with training, development and certifications.
• Global annual DEPT® Cares Month in which employees come together and donate their skills to support local charities.

WHY DEPT®?

We are a Growth Invention company built to help the world’s most ambitious brands grow faster. Operating at the intersection of technology and marketing, we create what is next by pioneering ideas, acting fast, and moving further because standing still just is not in our DNA.

We are drawn to people who stay curious, move with intent, and never stop inventing. Our culture runs on three values: better together, relentlessly curious, and get sh*t done. It is how we work, how we grow, and how we make things that matter.

At DEPT®, you will find the freedom to explore, the space to collaborate, and the trust to make a real impact for our clients, for each other, and for the world we are helping to build.

DIVERSITY, EQUITY & INCLUSION 

At DEPT®, we take pride in creating an inclusive workplace where everyone has an equal opportunity to thrive. We actively seek to recruit, develop, nurture, and retain talented individuals from diverse backgrounds, with varying skills and perspectives.

Not sure you meet all qualifications? Apply, and let us decide! Research shows that women and members of underrepresented groups tend not to apply for jobs when they think they may not meet every requirement, when in fact they do. We believe in giving everyone a fair chance to shine.

We also encourage you to reach out to us and discuss any reasonable adjustments we can make to support you throughout the recruitment process and your time with us.

Want to know more about our dedication to diversity, equity, and inclusion? Check out our efforts here.