Francesco Longo

Good Growth helps businesses optimise digital performance through experimentation. As a developer, I specialize in leveraging advancedfront-end technologies to deliver high-impact A/B testing solutions. Core Stack: TypeScript (React), JavaScript (Node), HTML, CSS, Google Cloud Platform (GCP) – Client impact: Authored and deployed over 50 A/B tests and high-complexity UI modifications, with multiple successful experiments being fully implemented by clients after generating up to 35% uplift in ROI, conversion, and site engagement metrics. – Developed Core Internal Logic and Reusability: Led the creation of logic-heavy internal tooling, including common utility APIs and a Global Stylesheet, maximizing productivity and ensuring cross-test consistency. Introduced and implemented Google Cloud Functions (GCP) to build advanced, performant functionality on client sites. – Established Company-Wide Documentation Standards: Designed and implemented a structured, client-specific technical documentation system that standardized client APIs, workflows, and legacy environ ment specifics. This framework was later adopted as the company-wide standard for developer onboarding and knowledge transfer. – Mastered Legacy System Optimization: Gained expert proficiency in TypeScript and advanced DOM manipulation by integrating new features and optimizing performance within complex, legacy client environ ments without modifying core site code, focusing on low-level performance and elegant solution architecture.

– Technical mentorship: Supported cohorts of developers by providing real-time, technical guidance on de bugging issues and architectural decisions across various full-stack tasks. Focused on developing independent problem-solving and reasoning skills rather than direct answers. – Delivered technical workshops: Designed and led technical lectures and deep-dive sessions, including specialised workshops on advanced React Hooks, component lifecycle, and backend API design.

UNIS was a startup providing digital toolsfor construction site managers. Though the company closed due to funding challenges, I gained significant experience building scalable user-facing tools in afast-paced environment. Tech Stack: Next.js, React, Firebase, JavaScript, React Native

Built and maintained the company's dashboard interface from scratch, enabling site managers to perform CRUD operations and manage workflow tasks via Firebase.

Created custom React hooks and reusable components to streamline front-end development and promote code modularity.

Applied performance optimization techniques (lazy loading) to improve responsiveness and rendering efficiency.