Senior Flutter Engineer (Remote) — AI-First & Complex Apps

Quona Capital; United States; Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

26 days paid vacation

Laptop provided

Mental health benefits (Wellhub)

Coaching & therapy sessions

Stock options

International team

Job summary

Klar is seeking a Senior Flutter Engineer to join its mobile engineering team. You will own complex features across Android, iOS, and Web within a large monorepo, driving architecture decisions and high-quality delivery.

The role emphasizes AI-first development, coding agents, and tooling to improve engineering workflows, with mentorship for colleagues and strong emphasis on performance and reliability. Join a diverse, international team spanning Mexico City, Berlin, and Argentina, and

Qualifications

• Strong experience building and maintaining complex Flutter applications in production.
• Deep knowledge of Dart and Flutter, including async programming and widget lifecycle.
• Experience with state management using BLoC/Cubit.
• Ability to integrate with APIs and handle data and errors robustly.
• Proven testing approach across unit, widget, and integration tests.
• Excellent communication and willingness to mentor teammates.

Responsibilities

• Own complex features from design through release with cross-functional teams.
• Shape new projects and improve existing applications.
• Make architecture decisions to keep the Flutter codebase maintainable.
• Investigate performance, reliability, and cross-platform issues.
• Build tests and automated checks for safe, frequent releases.
• Create and improve AI workflows for coding tasks and reviews.
• Configure agent harnesses and tool integrations for the codebase.
• Evaluate new AI methods and share approaches to improve quality.

Skills

Flutter expertise

Dart language

State management (BLoC/Cubit)

API integration

Testing (unit/widget/integration)

Performance optimization

Mentoring teammates

AI-first engineering

Tools

Flutter

Dart

GitHub Actions

Melos

CI/CD

Job description

Klar is seeking a Senior Flutter Engineer to join its mobile engineering team. You will own complex features across Android, iOS, and Web within a large monorepo, driving architecture decisions and high-quality delivery.

The role emphasizes AI-first development, coding agents, and tooling to improve engineering workflows, with mentorship for colleagues and strong emphasis on performance and reliability. Join a diverse, international team spanning Mexico City, Berlin, and Argentina, and