.Net, Flutter Developer

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🔥 0 minutes ago

🇺🇦 Ukraine – Remote

⏰ Full Time

🟡 Mid-level

🟠 Senior

🔙 Backend Engineer

👻 Ghost score 10%

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Nayax

WebsiteLinkedInAll Job Openings

501 - 1000 employees

💳 Fintech

🛒 Retail

💰 Venture Round on 2018-02

Fintech • Retail

Nayax is a global fintech leader that specializes in offering cashless payments, management, and loyalty solutions for retailers worldwide. Established in 2005, Nayax has been at the forefront of the cashless payment revolution, providing an innovative payment platform and management system designed for unattended retail. With a commitment to customer-first service and in-house development, Nayax serves businesses in more than 62 countries, facilitating the acceptance of over 50 currencies and 80 payment forms. Their technology empowers merchants through consumer engagement tools, loyalty programs, and omnichannel solutions, ultimately aimed at enhancing operational efficiency and driving growth.

📋 Description

• Implement changes, new features and bug fixes in the existing C#/.NET backend • Design, extend and document REST APIs for the mobile app using Swagger/OpenAPI • Work with relational database schemas, queries and migrations • Refactor legacy code and improve service performance, reliability and maintainability • Implement authentication and authorization and securely handle sensitive and payment data • Write unit and integration tests and participate in code reviews • Support releases, investigate production incidents and perform root cause analysis • Continue rebuilding the mobile app in Flutter for Android and iOS • Develop screens, user flows and reusable UI components from design specifications • Integrate the app with backend APIs, including error handling, offline states and data caching • Implement authentication, onboarding, deep links, push notifications and payment flows • Support localization, RTL languages and accessibility requirements • Manage state, navigation and scalable app architecture • Prepare builds and publish releases to the App Store and Google Play • Analyze requirements and user stories, estimate tasks and propose technical solutions • Use AI-assisted development tools for design, implementation and testing while reviewing code quality and security • Collaborate with Product Managers, designers, QA engineers and developers • Participate in Agile ceremonies including sprint planning, backlog refinement, stand-ups and retrospectives • Maintain technical documentation and improve engineering processes • Share knowledge and mentor middle and junior developers

🎯 Requirements

• 5+ years of commercial experience building backend services in .NET and cross-platform mobile apps in Flutter • Production release experience for Android and iOS in Agile teams • Strong focus on code quality, performance and security • C# and .NET (.NET 6+ / ASP.NET Core) • REST API design • Entity Framework Core and Dapper • SQL (MS SQL Server or PostgreSQL) with query optimization • OAuth 2.0 and JWT • Dependency Injection • Clean / Layered Architecture and SOLID • xUnit / NUnit and Moq • Flutter and Dart for production Android and iOS apps • State management with Bloc, Riverpod or Provider • REST API integration using Dio or http and JSON serialization • Navigation and deep links • Push notifications using Firebase Cloud Messaging • Localization, RTL and accessibility • Local and secure storage • Widget and integration testing • Azure DevOps, Git and pull request workflow • Swagger / OpenAPI • Firebase Crashlytics, Analytics and Cloud Messaging • App Store Connect and Google Play Console • CI/CD for backend and mobile • Android, iOS, Web API and AWS cloud • Agile and Scrum • Code review, application security basics, performance optimization, debugging and root cause analysis • Requirements analysis and technical documentation • English at Upper-Intermediate (B2) level • Ability to work independently across backend and mobile and manage multiple priorities • Ownership and focus on high-quality, maintainable solutions • Effective communication with technical and non-technical stakeholders • Proactive problem solving and sound architectural decision-making • Experience in a fast-paced product development environment

🏖️ Benefits

• A work laptop is provided on request • Access to the Juno learning platform • 20 working days of vacation and sick leave • Medical insurance covering dental care, massages, doctor visits and vaccinations

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