Senior Fullstack Engineer - Fintech (Flutter/React/Java)

Ghanem; United States; Remote; USD 120,000 - 170,000; Full time

Job summary

Ghanem is seeking a Senior Fullstack Engineer to own features across Flutter apps, React web, and Java services. You will turn investment and operational requirements into clear user experiences backed by secure, reliable APIs, combining frontend craft with backend depth.

You will work in a hands-on role, delivering across mobile and web, building REST APIs with identity, banking, and payment providers, and mentoring fellow engineers to improve code quality and system design.

Qualifications

• 5+ years of professional software engineering experience across mobile, web frontends, and Java/Spring Boot backends.

Responsibilities

• Deliver complete features across Flutter, Dart apps, React TS interfaces, Spring Boot APIs, and PostgreSQL for onboarding, investment checkout, wallets, portfolios, and operations workflows.
• Build accessible mobile and web interfaces with reusable Flutter widgets and React components, reliable state and data fetching, validated forms, and clear loading and error states; support Arabic and English layouts.
• Build and maintain REST APIs and integrations with identity, banking, payment, and KYC/AML providers, including authentication, webhooks, and scheduled processing.
• Protect financial correctness through clear transaction boundaries, precise monetary calculations, idempotency, concurrency control, and traceable state changes.
• Design PostgreSQL schemas and safe Flyway migrations; investigate query performance and use Redis caching and distributed coordination where appropriate.
• Write maintainable code and meaningful tests using Flutter widget and integration tests, React Testing Library and Vitest, and JUnit, Testcontainers, and WireMock for backend integration.
• Own production behavior: add useful telemetry, investigate failures, support releases, and resolve root causes with DevOps and SDET colleagues.
• Review code, document important design decisions, mentor engineers, and improve existing systems through focused, practical refactoring.

Skills

React

TypeScript

JavaScript

HTML/CSS

Flutter/Dart

SQL/PostgreSQL

REST APIs

CI/CD

Testing

Mentorship

Tools

Docker

Kubernetes

GitHub Actions

Argo CD

Flyway

Testcontainers

WireMock

JUnit

Vitest

React Testing Library

Job description

Ghanem is seeking a Senior Fullstack Engineer to own features across Flutter apps, React web, and Java services. You will turn investment and operational requirements into clear user experiences backed by secure, reliable APIs, combining frontend craft with backend depth.

You will work in a hands-on role, delivering across mobile and web, building REST APIs with identity, banking, and payment providers, and mentoring fellow engineers to improve code quality and system design.