Mobile Developer

Homerun B.V.; Rotterdam; On-site; EUR 60,000 - 80,000; Full time

Benefits offered by this job

Competitive salary and equity options

Flexible hybrid work arrangements

Mission-driven work with meaningful impact

Job summary

A pioneering healthcare tech company in Rotterdam is seeking a Senior Mobile Developer to lead their mobile applications for iOS and Android. The role emphasizes the integration of AI tools in engineering processes and requires a strong foundation in mobile development and architecture. Ideal candidates are driven by the mission to enhance healthcare accessibility and thrive in a fast-paced startup environment, with a preference for hybrid work arrangements.

Qualifications

• Proven track record as a Senior Mobile Engineer or equivalent.
• Expertise in native iOS and Android development and cross‑platform tooling.
• Strong software architecture and system design fundamentals.
• Demonstrated agentic engineering practice with AI agents integration.
• Hybrid work with on-site preference in Rotterdam.

Responsibilities

• Take full ownership of Ditto's mobile applications across iOS and Android.
• Leverage agentic engineering workflows to ship at startup speed while maintaining quality.
• Ensure secure‑by‑default from day one in handling patient data.

Skills

Native iOS development

Native Android development

Cross-platform tooling

Strong software architecture

Agentic engineering practices

Job description

We're looking for a unicorn builder.

Who we are

Let’s bring convenience to care: Ditto is on a mission to revolutionize care by providing people the right info, in the right format, at the right time.

Why?

Imagine your grandmother always bringing one of her children to the hospital, since she does not fully grasp what has been said. Let alone is she able to recall what's going on when she comes home. Or going through ten different apps and hospital portals to stitch together your medical history, in Latin. Healthcare systems are designed for the providers, and leave people feeling passive and ill‑understood. In other words, they force us to be patient. We think that should be different, by putting you and your loved ones at the heart of care. That ambition is – naturally – universal and thus actually global.

What?

With Ditto. Our technology allows everyone to capture, explain, and share meaningful interactions about health. Today, that is an AI‑powered app that clarifies any healthcare encounter and document. Soon, we grow towards a platform that allows you to keep track of your own healthcare, invite loved ones to follow your care journey, and vice versa. In short: we want to build the Polarsteps for Health.

Who?

A young yet turbo ambitious and experienced team, with little patience for the status quo. We’re driven by a shared mission and excited about building fast and purposefully. Days after launch, we reached #1 healthcare app in the Netherlands and got covered by 15 newspapers.

We are now shaping the team to build this into a European market.

Want to help us build this?

Who you are

You’re an engineer with deep mobile fundamentals (concurrency, memory management, platform APIs, architecture) who has discovered that agentic engineering is the biggest force multiplier since the creation of high‑level languages. You don’t just use AI tools; you orchestrate them. You design multi‑step agent workflows, you know when to trust agent output and when to intervene, and you understand that the real skill isn’t generating code, it’s maintaining quality, security, and architectural coherence at the speed agents enable. At Ditto, agentic engineering isn’t a nice‑to‑have, it’s how we build. You’re actively pushing the boundaries of what’s possible, not because it’s trendy, but because you’ve seen what happens when strong fundamentals meet AI‑native workflows: exceptional software, shipped fast, without cutting corners.

Before the big AI‑bang, you already built extensive experience, ideally cross‑platform. You know the ins and outs of SwiftUI and Kotlin. You pixel‑peep when needed, and you’re assertive in suggesting improvements on designs and flows. Hand‑over from design is outdated; you are an active and continuous partner with designers. If Claude goes down tomorrow, you still ship.

Above all, you are a fanatic team player driven by Ditto’s mission: making healthcare understandable for hundreds of thousands of patients. We are mission‑first, and that should resonate deeply. You feel impatient about getting closer to that mission.

Key Responsibilities

• Take full ownership of Ditto’s mobile applications across iOS and Android.
• Leverage agentic engineering workflows to ship at startup speed while maintaining production‑grade quality. The hard part isn’t going fast, it’s going fast without accumulating debt.
• Design tangible, practical solutions. Push back when our bold ambitions are technically harder than we naively think.

Think secure

• Ensure secure‑by‑default from day one. In a healthcare context handling sensitive patient data, this is non‑negotiable.
• Apply security best practices in every line, whether you wrote it or an agent did.
• Conduct regular vulnerability assessments to identify and mitigate risks proactively.

Product collaboration

• Understand the business need behind every change.
• Work closely with product to translate requirements into robust technical solutions.
• Ensure flexible architecture that can survive significant pivots.

Required Qualifications

• Proven track record as a Senior Mobile Engineer or equivalent.
• Expertise in native iOS and Android development and cross‑platform tooling.
• Strong software architecture and system design fundamentals. This is the foundation everything else is built on.
• Demonstrated agentic engineering practice (e.g. Claude Code, Cursor, multi‑agent systems). We don’t mean “I’ve used Copilot autocomplete.” We mean you’ve integrated AI agents into how you design, build, review, and ship software.
• We work hybrid. You want to work in our awesome Rotterdam office 3+ days a week, with the flexibility to work remotely the rest. As a start‑up, today we cannot yet sponsor visas.

Preferred Qualifications

• Startup experience, you know what it means to own a problem end to end with limited resources.
• Familiarity with the Dutch healthcare system or experience in regulated industries.
• Contributions to open‑source projects or public technical writing.

Package

You know the drill. All is up for debate, pending your experience. You help shape the culture (e.g. fair use of holiday), and will share in any success of the company via equity. We have tons of Poke‑merch.

What We Offer

• Mission‑driven work: build something that genuinely makes healthcare more accessible for millions.
• Competitive salary and equity options.
• Close‑knit team that cares about you.
• Work with the latest in AI and healthcare technology.
• Direct collaboration with founders and senior leadership.
• A fast‑paced environment where your contributions directly shape the product.
• Learning opportunities across the full stack of modern software development.
• Flexible hybrid work arrangements with a preference for in‑person collaboration.
• A team that values speed, pragmatism, and getting things done.
• Pokemon merch.

Apply for the job

Do you want to join our team as our new Senior Mobile Developer? Then we’d love to hear about you!