Senior Flutter Engineer


Company:	Rullion
Salary:	£650 to £750 a day
Hours:	Full-time
Location:	London, EC1M 6PB
Job type:	Contract
Posting date:	25 Sept 2026
Closing date:	25 Oct 2026

Apply for this job

Summary

Senior Flutter Engineer

Full-time

Inside IR35

Hybrid 1 office day

London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB

Join a dynamic energy provider dedicated to sustainable solutions in the UK. We are seeking an experienced Senior Flutter Engineer to join a fast-paced development team delivering high-quality mobile applications. You will play a key role in designing, developing, and maintaining cross-platform applications using Flutter, while contributing to architecture decisions, code quality, and engineering best practices.

Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV.

Accountabilities:

Design, develop, and maintain scalable Flutter applications for iOS and Android.

Collaborate with Product Managers, UX/UI Designers, and Backend Engineers to deliver new features.

Write clean, maintainable, and well-tested code.

Lead technical discussions and provide guidance to other developers.

Optimise application performance, reliability, and security.

Participate in code reviews and champion engineering best practices.

Integrate RESTful APIs and third-party services.

Support CI/CD pipelines and automated testing processes.

Opportunity to work on innovative mobile products.

Collaborative and highly skilled engineering team.

Knowledge and Skills:

Extensive commercial experience developing mobile applications with Flutter and Dart.

Strong understanding of mobile application architecture and design patterns.

Experience integrating APIs and working with cloud-based services.

Proven track record of delivering production-ready applications.

Knowledge of state management solutions.

Experience with Git, CI/CD pipelines, and automated testing.

Strong problem-solving and stakeholder engagement skills.

Experience mentoring developers and leading technical initiatives.

Knowledge of native Android (Kotlin) or iOS (Swift) development.

Previous experience working within Agile delivery teams.

Please note:

Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service.

This vacancy is being advertised by Rullion Ltd acting as an employment business.

Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates.

We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants.

Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.

Apply for this job