Senior Product Engineer - Android/Kotlin

Qonto; Berlin; Remote; EUR 90,000 - 120,000; Full time

Job summary

Qonto is seeking an Android Engineer to build the mobile experience used by 600,000+ European businesses. You will own features end-to-end in a large, modular Kotlin codebase, collaborating with Product, Design, Backend, and Frontend teams to deliver high-quality mobile experiences.

Join an AI-first engineering environment where you’ll use Claude Code, Cursor, and Copilot to raise the bar. Expect a technically demanding fintech domain with strong focus on security and real-time data.

Qualifications

• Strong Android native experience with Kotlin and production features.
• Quality-driven mindset with focus on testing, clean code, and pragmatic standards.
• Problem-solving approach in ambiguity to create robust solutions.
• AI-native workflow with daily use of AI coding tools to augment output.
• Collaborative by nature, fluent in English, contributing via code reviews and mentoring.

Responsibilities

• Own features end-to-end from discovery to rollout and iteration.
• Drive technical decisions in squad with Product, Design, and Backend.
• Raise app reliability and maintainability through architecture improvements and tests.
• Tackle complex mobile challenges like real-time sync and offline resilience.
• Grow the Android craft by leading code reviews and sharing patterns.

Skills

Android

Kotlin

Testing (unit/UI)

Tools

Jetpack Compose

GitHub Actions

Bitrise

Firebase Test Lab

Sonar

Fastlane

Job description

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here).

Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started.

Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit.

AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it.

Location: You can choose to work at Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, Portugal, or Spain.

Mission

Join us as an Android Engineer and help us build the mobile experience that 600,000+ European businesses rely on every day to manage their finances. You'll own product-critical features end-to-end - from technical design to rollout - in a large, modular Kotlin codebase where craft and velocity both matter. You'll work closely with Product, Design, Backend, and Frontend.

What you'll do

• Own features end-to-end: You'll take ownership from discovery and technical design through implementation, rollout, and iteration on features that help businesses pay, get paid, and stay in control.
• Drive technical decisions in your squad: You'll shape solutions with Product, Design, and Backend by clarifying tradeoffs across UX, performance, security, and time-to-market.
• Raise app reliability and maintainability: You'll improve architecture, performance, and test strategy to scale the app without compromising stability.
• Tackle complex mobile challenges: You'll contribute to real-time synchronization, resilience patterns, and smooth navigation in a modular codebase with ~1,000 modules.
• Grow the team's Android craft: You'll lead code reviews and technical discussions, share patterns, and mentor peers to raise the bar on quality and delivery.

What we're looking for

• Strong Android native experience: You've shipped and maintained production features with Kotlin and are comfortable owning technical decisions end-to-end.
• Quality-driven mindset: You care about testing (unit, UI, snapshot), clean code, and pragmatic standards that keep teams moving fast.
• Problem-solving approach: You thrive in ambiguity and turn complex constraints into simple, robust solutions.
• AI-native workflow: You use AI coding tools daily to amplify your output — not just experiment with them.
• Collaborative by nature: You're fluent in English and contribute through code reviews, knowledge sharing, and mentorship across technical and non-technical stakeholders.

What we can offer you

• An AI-first engineering environment: Unlimited access to Claude Code, Cursor, and Copilot — and a culture that expects you to use them to raise the bar, not just go faster.
• Engineering standards that scale: Strong code review culture, continuous refactoring, and a focus on correctness in a regulated context.
• A technically demanding domain: Fintech constraints - security, compliance, real-time data - push you to solve problems most mobile engineers never encounter.

Our methodology, the Qonto Way

• We value upfront technical design, team reviews, and smart slicing — quality drives the velocity our customers need.
• Our org assigns one team lead per project across stacks, giving your team a clear mission and full autonomy on how it operates.
• Our lean toolbox, Kaizen and PDCA, lets you monitor and drive continuous improvement collaboratively with your peers and manager.

Our stack & practices

• Kotlin-first & modern concurrency: 100% Kotlin codebase with Coroutines + Flow throughout.
• Architecture: MVVM + Clean Architecture with modular design (~1000 modules).
• UI direction: New screens built with Jetpack Compose, with a large share of legacy views already migrated.
• CI/CD & quality: GitHub Actions, Bitrise, Firebase Test Lab, Sonar, Fastlane.
• Testing culture: 26k+ unit tests, 14k+ snapshot tests, 500+ UI tests.

Curious about how we tackle tech debt? Check out our talk from the last Droidcon here featuring Florian.

Your future team

As an Android Engineer, you will join one of Qonto's squad teams, each organised around a clear project mission, with one team lead and full ownership of a product scope. You'll be part of a 140+ mobile engineering community within a 500+ Product Engineering department, working in focused teams of 5 to 10 people alongside Product, Design, and peers from Frontend and Backend.

At Qonto, we understand that true diversity isn’t just about ticking boxes on a hiring checklist. Apply regardless of the boxes you tick — who knows? You may have the missing piece of the puzzle we’ve been searching for all along.

By applying, you agree that Qonto processes your personal data to assess your application. Your data is kept for up to 2 years in our candidate pool. Read our Privacy Notice for full details.

On average, our hiring process lasts 20 working days. More information on our candidate journey.

Your security matters to us

Recruitment scams are on the rise. Keep in mind, we will never work with third-party platforms or agencies that request payment from candidates.