Senior Frontend Engineer

Senior Flutter Engineer (Fintech) — Sinder

Location: UAE (Dubai/Abu Dhabi) or Remote (with overlap to Gulf time)

Type: Full-time

Team: Product & Engineering

About Sinder

Sinder is building a premium, travel-first card and wallet for the UAE—starting with a fast, clean mobile experience for card issuance, top-ups, real-time transaction visibility, and smart spend insights.

We work with regulated partners (issuer bank + processor) to bring a modern product to market without compromising on security, reliability, or compliance. We’re a small team, moving quickly, shipping often, and obsessing over details.

The role

We’re hiring a Senior Flutter Engineer to take meaningful ownership of our mobile app as we move from pilot → broader launch. You’ll be building core journeys (onboarding, card, top-up, transactions/statements), improving architecture and developer experience, and helping set the quality bar for a fintech product.

This is a hands-on role with real autonomy: you’ll influence technical decisions, collaborate closely with the CTO and product, and see your work ship directly to users.

What you’ll do

Build core product flows in Flutter: onboarding & identity verification, virtual/physical card journeys, card controls, top-up (bank transfer), transaction details, statements, and notifications
Own mobile quality : performance, stability, crash-free sessions, edge-case handling, and production readiness
Strengthen architecture (Clean Architecture / feature-first) and keep the codebase maintainable as the product scales
Integrate with partner systems (auth/identity, card processing, transaction feeds) with robust token/session management and error handling
Implement security best practices for a fintech app (secure storage, sensitive logging discipline, device integrity considerations, safe networking patterns)
Write and expand tests (unit/widget/integration) and support CI/CD release workflows
Mentor and uplift engineering standards through code reviews, pairing, and clear technical documentation

What we’re looking forMust-have

5+ years building mobile apps, including 3+ years in Flutter/Dart
Strong Flutter fundamentals (rendering, performance, navigation, async, state management)
Experience shipping and operating production apps (release process, monitoring, bug triage)
Solid API integration skills (REST, auth, retries, timeouts, idempotency awareness, error states)
A pragmatic “build fast, build right” mindset—high ownership, high standards
Clear communication and comfort working in a small, fast-moving team

Nice-to-have

Fintech experience (cards, wallets, KYC/identity, regulated environments)
UAE context experience (UAE Pass, Arabic localization, local UX patterns)
Strong security posture (secure storage patterns, certificate pinning concepts, threat modeling mindset)
Familiarity with scalable state management patterns (Provider/Riverpod/BLoC) and functional error handling approaches
CI/CD experience (Fastlane, GitHub Actions, Firebase App Distribution/TestFlight)

Our current mobile stack (indicative)

Flutter 3.x / Dart 3.x
State management: Provider (ChangeNotifier)
Networking: Dio (+ retry/token refresh patterns)
Error handling: fpdart (Either/Result-style)
Codegen: freezed , json_serializable
Secure storage: flutter_secure_storage
Notifications: Firebase Cloud Messaging
Logging/observability: Talker (with strong redaction discipline)

What you’ll find at Sinder

A product with real-world complexity (identity, payments, security, UX trust)
A team that cares about craft and shipping
High impact : your work directly shapes the app and the user experience
A chance to help define the mobile engineering bar at an early-stage fintech

Compensation & benefits