Senior Flutter Developer (freelance)

intent; Polska; Remote; PLN 124,000 - 248,000; Part time

Job summary

intent is seeking a Senior Flutter Developer for freelance, time & material work. You will build Flutter apps that talk to hardware over BLE, including flutter_blue_plus, on iOS and Android.

The first three months are a ramp, with potential move to a permanent contract and full benefits. We design connected devices for wearables and health-tech for global clients, AI-native, fully remote.

Qualifications

• Strong commercial experience with the Flutter SDK.
• Advanced Dart skills, including state management and async patterns.
• Working knowledge of iOS and Android.
• Hands-on BLE experience, particularly with flutter_blue_plus.
• English at B2+, written and spoken.
• Problem-solving over line-counting; creative thinker.
• High coding standards and team-aligned.
• Initiative and willingness to share ideas.
• Engagement and team-play.

Responsibilities

• Build and maintain Flutter apps that communicate with hardware peripherals over BLE
• Make cross-platform code that behaves well on both iOS and Android
• Take part in specifying, planning, and estimating new modules and features
• Improve reliability by troubleshooting QA issues
• Review pull requests and give constructive feedback
• Share what you learn via tech talks and internal docs
• Work with firmware engineers, designers, QA, and PMs

Skills

Flutter SDK

Dart skills

iOS/Android knowledge

BLE experience

English B2+

Problem solving

Coding standards

Initiative

Team play

Tools

flutter_blue_plus

Job description

In short If you're a Senior Flutter Developer who knows what flutter_blue_plus does in production, and you've shipped apps that talk to physical devices over BLE, we want to talk. You'd join us on a freelance, time & material basis : you're paid for the hours you actually work on real client projects.

The first three months are about figuring out if we're a good match. When things work out, and that depends on the work itself, the project pipeline, and business timing, there's a real path to our core team with a permanent contract and full benefits.

Why intent ? We've been designing and co-creating connected devices since 2008. Wearables, smart audio, health-tech hardware for clients like Oura and BOSE, backed by investors like a16z and Founders Fund. We're 60+ people, fully remote, and AI-native since before LinkedIn influencers discovered the term.

Our Flutter work isn't another generic app: it's cross-platform code talking to firmware, sensors, and real hardware behavior on both iOS and Android. If your Dart has ever made a physical device do something it couldn't do before, you already get why we love what we do.

Who this role is NOT for

If you like being told exactly what to build every morning, opening Jira, closing Jira, and logging off at 17:01, we're probably not your people.

We look for engineers who ask "why" before "how", challenge assumptions, and occasionally break things because they were trying something new. We're AI-native and we expect you to treat AI as a daily multiplier, not a gimmick.

What we expect

ownership of what you touch, straight talk when things get complicated, and the kind of curiosity that makes you actually care about the device on the other end of your Bluetooth connection.

What you'll do

• Build and maintain Flutter apps that communicate with hardware peripherals over BLE
• Make cross-platform code that behaves well on both iOS and Android, not just "compiles on both"
• Take part in specifying, planning, and estimating new modules and features
• Improve reliability by chasing down the issues QA finds, including the weird ones
• Review pull requests and give your teammates feedback that actually helps
• Share what you learn: tech talks, internal docs, pair sessions, whatever fits
• Work side by side with firmware engineers, designers, QA, and PMs
• Use AI tools as part of your daily workflow, not as a party trick

How we work

Fully remote. We have a pet-friendly office in Warsaw and a coworking space in Gdansk if walls and coffee machines motivate you, but nobody will ask why you're not there. Working hours are flexible: most of the team operates between 10:00 and 18:00 CET, and that's when most meetings happen. Evening calls with US-based clients (up to ~20:00) are part of the rhythm, sometimes a couple of times a week, always planned ahead. You'll be part of the Mobile chapter for knowledge-sharing, and at the same time on a project squad led by a PM for day-to-day delivery.

What you'll get

• 90-180 PLN/h net B2B, depending on your experience
• Truly flexible hours: you organize your day
• Fully remote, with pet-friendly Warsaw office + Gdansk cowork if you want them
• Access to our internal knowledge-sharing: tech talks, experiments, side projects
• When the first 3 months work out, and that depends on the work, the project pipeline, and business timing, there's a real path to a permanent contract with a fixed monthly salary, 26 days paid leave, 10 sick days, Saltus medical care, and a training budget

No sugarcoating: during the freelance period there's no paid leave or medical benefits. Those come with the permanent contract, and we're transparent about that upfront.

Your first weeks

We aim to give you space to ramp up before jumping into live project work, but this is a real company with real deadlines: if the project needs you sooner, we'll make sure you have the support to hit the ground running. You'll get paired with a technical buddy and tackle progressively bigger tasks, so both sides can see how the collaboration feels. Feedback comes early and often, no one waits three months to tell you something isn't working. If it's great, you'll know. If something needs adjusting, you'll hear about it while there's still time to adjust.

Recruitment process

• Application with a few screening questions
• HR call, ~45 min, casual
• Technical meeting, ~90 min, with the technical team (may include live coding)
• Final feedback within a few days

Once we're in touch, you'll hear from us fast. We don't ghost and we don't drag.

One more thing

intent is an equal opportunity employer. We care about what you can do, not where you come from.

Requirements

• Strong commercial experience with the Flutter SDK (not "I built a side project once")
• Advanced Dart skills, including state management and async patterns
• Working knowledge of iOS and Android: enough to debug when the platform layer is the problem
• Hands-on BLE experience, particularly with flutter_blue_plus or similar
• English at B2+, written and spoken, because our clients are mostly US-based
• Problem-solving over line-counting: we'll take a creative thinker over a fast typist any day
• High coding standards and willingness to align with the team's patterns
• Initiative: you bring new ideas in and you can also walk away from them when the evidence says so
• Engagement and team-play, the kind where people actually want you in the room

Nice to have

• Native iOS (Swift) or Android (Kotlin) experience for the moments when Flutter isn't enough
• Previous IoT or connected device projects
• Method channels and platform-specific plugin work
• Scrum or other Agile delivery experience
• Willingness to share publicly: hackathons, conferences, internal talks
• Genuine curiosity about the devices you build for, not just the code behind them