Flutter Engineer (Contract)

AND Digital Limited; Greater London; On-site; GBP 111,000 - 166,000; Full time

Job summary

AND Digital is seeking a Contract Flutter Engineer to join an in-house backend engineering team working on a highly regulated medical technology product in London. You will own a self-contained area from initial design through tested and documented code, potentially covering alarms, patient data persistence, device supervision and service functionality.

This role requires experience with Dart/Flutter on embedded Linux, Flutter Bloc patterns, unit and integration testing, CI, and rigorous quality

Qualifications

• Demonstrated experience deploying Dart and Flutter interfaces on embedded Linux
• Deep knowledge of flutter_bloc, Cubit, and provider architectural patterns
• Proven background building socket connections using FlatBuffers over local TCP
• Strong ability to create performant CustomPainter charts for high-frequency data
• Experience with flutter localizations, ARB files, and timezone-aware rendering
• Strong testing track record: unit, widget, screenshot, regression
• Experience with CI, peer reviews, inline documentation, and clear requirements mapping

Responsibilities

• Construct guided setup workflows and patient ID workflows
• Deliver real-time metrics and data visualization features
• Build alert views, silence controls, and status panels
• Develop screens for system boot, permissions, and data export

Skills

Flutter development

Dart

embedded Linux

flutter_bloc

Cubit

provider

socket connections

FlatBuffers

CustomPainter charts

timezone rendering

unit testing

CI

code reviews

Tools

flutter-auto

systemd

Job description

Contract Flutter Engineer

Location

London, 2 to 3 days onsite in Kings Cross
Contract: Immediate start - 6 month

Who We Are

AND Digital are on a mission to close the world's tech skills gap.

We help organisations navigate the future of technology by combining human expertise, emerging tech and AI to deliver better outcomes, faster.

Since 2014, we've worked alongside clients to solve complex challenges, build high-performing teams and create lasting capability. Today, we're over 1,300 people across the UK, Europe and the USA, with ambitious plans for continued growth.

The Role

We're looking for 1 Flutter Engineer to join an in-house backend engineering team working on a highly regulated, safety-critical medical technology product.

You'll own a self-contained area of the application, taking work from initial design through to merged, tested and documented code. Depending on your experience and the team's needs, this could include areas such as alarms, patient data persistence, device supervision and start-up, session management or service functionality.

You'll work closely with the Software Architect and engineers responsible for surrounding components, while taking ownership of delivery within your area.

This role is well suited to an experienced Flutter Engineer who has worked on Linux-based safety-critical, mission-critical or highly regulated products and is comfortable working with formal quality processes, static analysis, code coverage and rigorous testing requirements.

What You'll Do

• Construct guided setup workflows, patient ID workflows, sensor lifecycle tracking, data quality thresholds, subsystem monitoring screens, and embedded guidance tools
• Deliver real-time metric displays, interactive timeline graphs, target value baselines, motion metric indicators, historic data visualization, and clinical notation features
• Build prioritized alert views on the primary screen, silence controls, customizable limit ranges, and status message panels
• Develop screens for system boot, permissions routing, loss-of-signal alerts, time-zone settings, pause states, discharge workflows, shutdown routines, service utilities, and data export functions

Experience Required

Essential

• Demonstrated experience deploying Dart and Flutter interfaces on embedded Linux setups (flutter-auto), alongside familiarity with fixed touchscreen layouts, virtual keypads, and systemd service managers
• Deep practical knowledge of flutter_bloc, Cubit, and provider architectural patterns, utilizing sealed classes, pattern matching, and stream regulation techniques
• Proven background building socket connections to process size-prefixed FlatBuffers packets over local TCP networks
• Strong capability creating performant CustomPainter charts for high-frequency data streams designed to minimize memory allocation overhead
• Comprehensive understanding of flutter localizations, ARB files, and timezone-aware component rendering
• Strong track record in unit, widget, screenshot, and regression testing, reaching full coverage metrics across safety-critical modules
• Experience with continuous integration, detailed peer reviews, structured inline documentation, and clear requirement mapping

Desirable

• Familiarity with medical technology environments or regulatory quality frameworks
• Working knowledge of C++ for reviewing protocol definitions and defining service interfaces
• Comfort translating Figma designs and contributing toward software risk evaluations (FMEA)

Equal Opportunities

AND Digital is an equal opportunity employer. We welcome applications from people of all backgrounds and experiences and are committed to creating an inclusive workplace where everyone can thrive. We will make reasonable adjustments throughout the recruitment process where required.

AI Statement

We champion tech that helps people work smarter, but we want to get to know you! If you use AI to assist with your application or interview prep, please ensure all information submitted remains an accurate, truthful representation of your personal achievements and capabilities rather than generating false or misleading information. We may reject applications where AI is used inappropriately at any stage of the recruitment process.