Senior Flutter Developer

Leancode; Województwo mazowieckie; On-site; PLN 70,000 - 90,000; Full time

Benefits offered by this job

Comfortable office with a large backyard

Specialty coffee from a local roastery

Weekly knowledge sharing meetings

Frequent technical talks and conferences

Job summary

Leancode is seeking a Senior Flutter Developer to join their proficient team based in Poland. The ideal candidate will have over 5 years of experience in mobile development and at least 2 years with Flutter. You’ll ensure technical excellence, lead projects, and mentor team members while engaging with the vibrant Flutter community. The role offers an opportunity to work in a comfortable office, enjoy coffee culture, and participate in knowledge sharing. Proficient English and Polish are required.

Qualifications

• 5+ years of experience in Mobile development.
• 2+ years of experience with Flutter development.
• Familiar with Flutter's Widget-Element-RenderObject pipeline.

Responsibilities

• Ensure technical excellence of mobile projects.
• Lead architectural decisions and mentor the team.
• Drive mobile application development from conception to deployment.

Skills

Mobile development experience

Flutter development experience

Knowledge of Dart

Understanding Flutter concepts

Experience with Bloc/Cubit + Provider

Leadership in mobile development teams

Proactive approach

Good command of English and Polish

Job description

Migration to Flutter Guide Discover our battle-tested 21-step framework for a smooth and successful migration to Flutter!

We are looking for a Senior Flutter Developer

Join probably the biggest Flutter Team in Poland!

At LeanCode, we build core technology solutions for global, large-scale organizations. We are a global leader in Flutter, an official Flutter Consultancy, and one of only four agencies at the Flutter Advisory Board – working closely with Google and delivering projects worldwide: from the US and LatAm, through Europe (UK, DACH, Nordics), to Australia.
Our future-proof strategy is built around two core pillars. The first is Flutter for Enterprise & Scaleups – delivering and migrating large-scale, business-critical systems to Flutter, serving hundreds of thousands to millions of users. The second is AI Transformation – helping software teams adopt AI-assisted development to significantly increase productivity and delivery predictability.
At our core, we are a team of 75+ engineers, designers, and specialists, who learn fast, constantly improve, and never cheat – both in how we build software and how we work with our clients.

We are looking for a Senior Flutter Developer who ensures the technical excellence of our mobile projects with their deep expertise and innovative approach. You should have a profound understanding of Flutter's internals, seamless platform integrations, and a strong grasp of mobile software architecture.

If you're passionate about great UI and love crafting pixel-perfect interfaces, smooth UX, and delightful animations, you can join our dedicated Flutter UI Team. Here, you’ll focus on projects that are all about design and user experience — building complex Design Systems and creating beautiful, highly-animated UIs that truly stand out.

If, on the other hand, you’re more passionate about SOLID principles, architecture, and large‑scale projects, you can grow into a Flutter Architect role. This position goes beyond hands‑on development — you’ll shape the technical vision, lead architectural decisions, and mentor the team to deliver outstanding results. If you thrive on solving complex challenges, designing elegant solutions, and guiding projects from concept to completion, we’d love to hear from you.

• Experience in Mobile (including Flutter) development (5+ years);
• Experience in Flutter development (2+ years);
• Experience in using Bloc/Cubit + Provider in large applications;
• Knowledge of Dart including the latest features;
• Understanding Flutter concepts like Widget->Element->RenderObject pipeline, Slivers, or platform embedding;
• Knowledge of Flutter platform integration techniques like method channels, pigeon, and FFI;
• Proven track record of leading and mentoring mobile development teams;
• Experience in driving mobile application development from the conception phase to the deployment and maintenance;
• Willingness to embrace and adopt new technologies and methodologies;
• Good command of English (written and spoken) and obligatorily Polish.
• Proactive approach and community involvement;
• Experience with other mobile development frameworks;
• Knowledge of other popular Flutter libraries like flutter_hooks, mobx, riverpod;
• Familiarity with WCAG and various accessibility concepts;
• Interest in User Experience.

Other important & what you can expect:

• We are noticeably involved in the Flutter community having Google Developer Experts in Flutter on board;
• We love conferences and meetups, not only attending but also speaking or even organizing;
• Comfortable, spacious office with a large backyard (we have frequent BBQ parties);
• Specialty coffee from a local roastery (yes, we are coffee freaks…);
• Knowledge sharing during weekly Mobile team meetings. This includes giving micro‑presentations about diverse topics to keep our skills sharp;
• Frequent technical talks from various areas of software development (system architecture, Domain‑Driven Design, mobile & frontend trends, UX).

Join our team as a Senior Flutter Developer!