Ugur G.

✅ 7+ years in software development | ✅ 3+ years building apps with React Native I’m a Senior Developer with 7+ years of experience building web and mobile applications, including the past 3+ years focused on React Native for cross-platform mobile development. My proven track record includes transforming complex product requirements into robust, high-performance mobile solutions that drive business value, particularly in the Fintech and Ad-tech SaaS sectors. I excel in end-to-end mobile development, from crafting intuitive user interfaces to designing resilient backend systems and optimizing cloud infrastructure for mobile deployments. My core technical stack and areas of expertise include: - Mobile App Development: React Native, TypeScript, React, Redux, Styled Components, i18next. - Frontend Development: React, Next.js, Svelte, Astro, Storybook, CSS. - Backend Development: Node.js, Express.js, Sequelize, Knex, TypeORM, GraphQL, REST APIs, WebSocket, Micro-services, Event-Driven Systems. - Cloud & DevOps for Mobile: AWS (IAM, ECR, ECS, S3, SQS, Lambda), Terraform, Docker, GitHub Actions, Redis, CI/CD. - Database Management: PostgreSQL, MongoDB, MySQL, MSSQL, DynamoDB. Key Mobile & Technical Achievements: - Implemented authentication and sensitive data security in a React Native app, including on-device encryption for tokens and biometric decryption (Face ID/fingerprint), ensuring secure mobile user experiences. - Significantly reduced mobile E2E test duration from 1.5 hours to 40 minutes by parallelizing Detox test suites, enhancing development efficiency for mobile projects. - Successfully built and scaled an invoice export service handling 20,000+ invoices/request, demonstrating ability to handle high-volume data for mobile-connected services. - Owned and integrated 10+ third-party services (Intercom, AppsFlyer, SolarisBank, IDNow, Segment, etc.) crucial for mobile analytics, attribution, KYC, and banking APIs. I focus on writing clean, maintainable code and building systems that hold up under real-world usage. Whether you need a new app built from scratch or help improving an existing one, I can step in and get things moving quickly. Highlighted Expertise: Mobile App Development | React Native | Cross-Platform Development | Full Stack Development | React.js | Node.js | TypeScript | AWS | Terraform | Microservices | GraphQL | REST APIs | PostgreSQL | MongoDB | MySQL | DynamoDB | Docker | CI/CD | SaaS Applications | Fintech | Ad-tech | Scalable Mobile Applications | Frontend Development | Backend Development | Redux | Next.js | Svelte | WebSocket | Event-Driven Systems | System Architecture | Performance Optimization | API Integration | Security | Detox Testing