Senior iOS Engineer

Shape the Future of Mobile Shopping – Build the Basket Experience for Millions

About bol

With 13 million customers, 30 million monthly visits, and about 33 million products on display, bol.com is the most successful online retail platform in the Netherlands and Belgium. Over 49 000 external partners enrich the product base, and 900 IT professionals (40 % internationals) make up 100+ autonomous agile teams.

The biggest challenge

Our shop is one of the most visible and innovative parts of bol. Our main objective is to safeguard the shop and ensure uninterrupted shopping experiences for our customers. In our relentless pursuit of maintaining the store as the foremost successful retail platform, we continuously dedicate ourselves to enhancing it through innovations that solve customer problems while delivering business value.

What your team is responsible for

Everyone using the basket on the website or app is considered our customer. It is our team’s responsibility to ensure our customers have an optimal experience with the shopping cart. We are accountable for the happiness of all 13 million Bol customers, handling 28.5 million items and order peaks of up to 700 orders per minute that go through our basket.

What you do as Senior iOS Engineer

In team Basket you work daily with the above-mentioned functionalities together with other engineers, a Product Manager, a Product Analyst and a Product Designer. You also work across teams since your team is part of the bol shop. We have daily stand‑ups, regular refinement sessions, retrospectives, innovation discovery and ideation sessions and iOS Chapter meetings. You are solely responsible for the iOS basket code and it is your job to keep an eye on both quality and speed.

At our company we uphold values of ownership, teamwork, and autonomy. We believe that taking ownership and working cohesively as a team are essential for success. Autonomy empowers our team members, creating a stronger collective.

We don’t just expect you to make technical decisions; we also expect you to take ownership and demonstrate accountability when things don’t go as planned. Our guiding principle is “you build it – you run it – you love it.”

In our dynamic environment you’ll thrive both independently and collaboratively. Effective communication is a cornerstone of your role. Together, we’ll shape the path to innovation and excellence in our shop.

Your expertise would be a real asset to our team because you know everything there is to know about:

• SwiftUI and the pitfalls of adopting new tech, and of course Auto‑Layout as we still use UIKit.
• High performance, and code that is both elegant and maintainable.
• Knowledge that extends beyond your own domain, enabling you to exchange ideas with colleagues from other disciplines.

You also know your way around:

• XCTest (unit and snapshot testing)
• SwiftUI and UIKit
• Modular codebase
• Modern concurrency
• Performance profiling, crash analytics and debugging

Also: you’re not afraid to innovate and use everything the latest technologies have to offer.

Where you’ll work and tech stack

The Basket Page is your team’s focus. The team is part of a Product called Optimal Checkout Experience, where we provide an optimal customer experience for the shopping cart and checkout page.

Our technology stack is rich and varied, providing you with ample opportunities to exercise creativity and innovation in your work. The key components of our tech stack include:

• iOS Technologies
  • Data Query Language: GraphQL
  • Monitoring and Analytics: Firebase
  • Development Practices: Continuous Integration/Continuous Deployment (CI/CD) / Unit testing
• Backend technologies
  • java, Kotlin
  • Spring Boot, Project Reactor, Coroutines
  • GCP, Kubernetes
  • Postgres, BigQuery

What we expect you will bring

• 5 years of experience as an iOS software engineer in an agile environment
• Enthusiasm, curiosity and a drive to look for improvement opportunities
• Drive to monitor technical trends in the mobile and specifically iOS space
• Practical experience with:
  • Tech: Swift, SwiftUI, UIKit, modern (structured) concurrency, GraphQL, REST
  • Architecture: common design patterns, MVVM, DI
  • Tooling: CI/CD, fastlane, crash and performance analytics
  • Other: HIG/UX, accessibility, design systems

Where you’ll work

You’ll join a Scrum team within the IT Consumer Conversion. The culture? Think “campus,” including a game room and soccer field. Despite our size, we poke fun at rigid rules and traditional work structures. We may be a market leader, but you won’t get a whiff of the corporate odor you associate with that. Our strength derives from working together as equals and constantly improving each other.

3 reasons why this is (not) for you Pros

• Skilled iOS Developer – If you’re a skilled iOS Developer with a technical background, preferably including experience with high‑volume apps.
• Proactive. Pragmatic. Iterative. – You thrive in an environment where innovation is key. You don’t just write code—you create exceptional experiences by collaborating with colleagues and leveraging data and user feedback. Quick iteration and continuous improvement are second nature to you.
• Experience with e‑commerce apps – If you have experience with e‑commerce apps, and don’t mind sometimes getting your hands dirty with iOS CI/CD and API work.

Cons

• Ignorance of business considerations – No, if you feel business considerations exist to be ignored.
• Stakeholders as a problem – No, if you think stakeholders are a problem instead of a solution.
• Led by the hand – No, if you like to be led by the hand – autonomy and ownership are not your thing.

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