Senior Flutter Developer (freelance)

intent

12h • $90 - $180 • Remote

About The Position

We are seeking a Senior Flutter Developer with proven experience in building and maintaining Flutter applications that communicate with physical devices over Bluetooth Low Energy (BLE). This is a freelance, time & material position with the potential for a permanent contract and full benefits after a successful three-month evaluation period. Our company specializes in designing and co-creating connected devices, including wearables, smart audio, and health-tech hardware for clients like Oura and BOSE. We are a fully remote, AI-native team of over 60 people. Our Flutter work involves cross-platform development that interacts directly with firmware, sensors, and hardware behavior on both iOS and Android.

Requirements

• Strong commercial experience with the Flutter SDK.
• Advanced Dart skills, including state management and async patterns.
• Working knowledge of iOS and Android sufficient for debugging platform-layer issues.
• Hands-on BLE experience, particularly with flutter_blue_plus or similar libraries.
• English proficiency at B2+ level (written and spoken).
• Strong problem-solving skills and a creative thinking approach.
• High coding standards and willingness to align with team patterns.
• Initiative to bring new ideas and the ability to adapt based on evidence.
• Engagement and team-play.

Nice To Haves

• Native iOS (Swift) or Android (Kotlin) experience.
• Previous IoT or connected device projects.
• Experience with method channels and platform-specific plugin work.
• Scrum or other Agile delivery experience.
• Willingness to share knowledge publicly (hackathons, conferences, internal talks).
• Genuine curiosity about the devices being developed for.

Responsibilities

• Build and maintain Flutter apps that communicate with hardware peripherals over BLE.
• Create cross-platform code that functions reliably on both iOS and Android.
• Participate in specifying, planning, and estimating new modules and features.
• Improve application reliability by addressing issues found by QA.
• Review pull requests and provide constructive feedback to teammates.
• Share knowledge through tech talks, internal documentation, or pair sessions.
• Collaborate with firmware engineers, designers, QA, and PMs.
• Utilize AI tools as a daily productivity enhancer.

Benefits

• Freelance, time & material basis with hourly pay (90-180 PLN/h net B2B).
• Truly flexible hours.
• Fully remote work environment.
• Access to internal knowledge-sharing sessions (tech talks, experiments, side projects).
• Potential path to a permanent contract with a fixed monthly salary, 26 days paid leave, 10 sick days, Saltus medical care, and a training budget after the initial freelance period.
• Option to use a pet-friendly office in Warsaw or a coworking space in Gdansk.

What This Job Offers

• Career Level: Senior
• Education Level: No Education Listed