Senior Frontend Engineer

🔒 Confidential Employer
Posted 28 April 2026
LOCATION
Remote
TYPE
Full-time
LEVEL
Mid-Senior level
CATEGORY
Technology
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Flutter SDK Clean Architecture Layered Architecture State Management (BLoC, Riverpod) Secure architectures (MFA, Biometrics, SSO) REST APIs MethodChannels CI/CD pipelines

FULL DESCRIPTION

Senior Frontend Engineer

Company: [Employer hidden — view at passion-project.co.uk] Co

Location: Remote

Work Type: Full time

Job Type: Full-time

Experience Level: Mid-Senior level

Role Summary

We are looking for a Senior Frontend Engineer who will take a key role in driving the architecture and evolution of our Flutter mobile applications. You will design scalable UI systems, mentor other engineers, ensure performance and accessibility standards, and influence technical strategy across the product.

A Senior Engineer is expected to own complex initiatives, solve high-impact problems, and shape how we build frontend applications using Flutter SDK.

Key Responsibilities

  • Drive architectural discussions and make decisions affecting multiple teams or domains.
  • Design core libraries and internal packages; define standards for code quality, security (data at rest/transit), and documentation.
  • Partner with UX, backend, and product teams to align technical strategy with business goals.
  • Lead efforts to improve rendering, reactivity, and observability (metrics, monitoring, error tracking) at scale.
  • Grow the technical capability of Junior and SSr engineers through constructive feedback and code reviews.
  • Drive adoption of AI-powered tools (Cursor/Copilot) to enhance developer experience and reduce technical debt.
  • High proficiency in English (spoken and written).

Qualifications

  • Deep understanding of the SDK, rendering pipeline, and responsive design.
  • Proven experience with Clean Architecture, Layered Architecture, and advanced State Management (BLoC, Riverpod, etc.).
  • Expertise in secure architectures including MFA, Biometrics, SSO, and sensitive data handling.
  • Experience using AI-assisted development tools (GitHub Copilot, Cursor).
  • Solid experience with REST APIs, MethodChannels (native bridge), and complex third-party integrations.
  • Experience defining end-to-end testing strategies and managing CI/CD pipelines (pipelines, automation, deployments).
  • Strong communication skills with the ability to influence engineering standards and mentor others.
  • Proficiency with Sentry, Firebase Crashlytics, and performance profiling tools.

Bonus points for

  • Experience creating custom Fastlane scripts or automating complex App Store/Play Store release cycles (staged rollouts, automated screenshot generation).
  • Experience with Product Analytics tools (Amplitude, Mixpanel, or Firebase Analytics) and an interest in user behavior data.
  • Familiarity with Docker or containerized development environments.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.

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