Enes Ş.

CaskMark LTD is a UK-based startup building an asset verification platform for the whiskey cask marketplace. The product focuses on secure ownership tracking, multi-party verification, and production-ready compliance for a regulated, high-value asset domain.

• Conducted a comprehensive audit of a Next.js 14 application built with AI-assisted development, validating architecture, code quality, and production readiness.

• Reviewed and hardened Supabase authentication flows, Row-Level Security (RLS) policies, and role-based access control to ensure data integrity and security.

• Tested and validated core workflows including onboarding, asset registration, multi-party verification, ownership transfers, and subscriptions.

• Identified and resolved performance issues (e.g., inefficient queries, potential N+1 patterns) and patched security vulnerabilities and race conditions.

• Improved UI/UX consistency across devices and browsers, ensuring responsive behavior and visual stability.

• Collaborated closely with the founder to refactor AI-generated logic, document findings, and implement prioritized improvements.

Onlined is a digital agency preparing the launch of an omnichannel messaging platform that integrates multiple third-party communication channels. The project emphasizes pixel-perfect UI, scalability, and seamless API integrations.

• Translated detailed Figma designs into responsive, pixel-accurate React components with a strong focus on usability and visual fidelity.

• Implemented component-based architecture and state management using Redux and modern React patterns.

• Integrated frontend components with backend APIs, ensuring reliable data flows and predictable UI behavior.

• Added unit and UI tests using Jest and React Testing Library to improve stability and regression coverage.

• Ensured cross-browser compatibility and responsive layouts using Tailwind and modern CSS practices.

• Collaborated with backend developers and designers to align implementation with the design system and technical specifications.

• Led the redevelopment of the client’s outdated frontend, delivering a new mobile-first, reactive platform built with React.js and TypeScript;

• Integrated Mapbox for advanced geolocation features, supporting real-time ship-to-port energy mapping;

• Implemented AWS Cognito and OAuth2 for secure authentication and user access management;

• Designed an MVP web application as the foundation for an upcoming React Native mobile app;

• Collaborated with backend engineers to integrate APIs and Postgres, ensuring seamless data flow and scalability;

• Optimized system performance and usability through responsive design and modular component architecture;

• Maintained and updated the legacy website as a secondary task while transitioning users to the modernized platform.

• Acted as the Frontend Lead Developer, spearheading the development of a cutting-edge React project within a team of 15 professionals;
• Focused on building a comprehensive Co-Working Booking and Reservation system, delivering the initial version within a year;
• Ensured the system operates seamlessly, currently supporting co-working spaces in Ubud, Bali;
• Collaborated with and provided support to the backend team as needed, ensuring smooth integration and functionality across the platform.

• Led the frontend-heavy fullstack development of a cross-platform eCommerce solution tailored for the US market;
• Delivered a seamless user experience with real-time delivery tracking and location-based shopping, optimizing local delivery through a crowdsourced network;
• Spearheaded API integrations to enhance system capabilities and streamline processes;
• Mentored junior developers, providing guidance on best practices and technical growth;
• Held end-to-end development responsibility, including DevOps operations for deployment, monitoring, and maintaining system stability.

• Solely managed and delivered the frontend development of a React-based cloud procurement platform;
• Led all aspects of maintenance, feature development, and continuous improvements, ensuring a fast and seamless integration experience;
• Enabled the platform to successfully serve numerous raw material sellers in the German market, reducing purchasing costs and optimizing procurement processes.

• Implemented location-based targeting to help companies increase customer interest, brand loyalty, and physical store visits through mobile interaction;
• Developed a smart algorithm with his team to analyze the interests of potential customers and provide personalized product and service recommendations;
• Boosted in-store traffic by encouraging customers to turn foot traffic into sales, driving higher conversion rates.