Muhammad Saleem

Product: Upsidecode.de provides technical support and custom development for a leading international advertising platform factor-eleven. I worked as part of a fast-paced engineering team focused on building highly customized, responsive ad experiences using React.js and TypeScript for enterprise clients across Europe and the US.

• - I'm working in an agile cross-functional team (8 developers, 2 designers, Product Manager, Engineering Manager) to deliver 20+ user-facing features using React, TypeScript, and Zod, increasing conversion rates by 25%.

• - Built a flexible component system that allowed designers and marketing teams to assemble new ad layouts faster, reducing production time and improving campaign launch speed increased sales 10%.

• - Designed and implemented a CRM system with a modern React + TypeScript frontend, integrating REST and GraphQL APIs. Focused on scalable architecture, advanced type composition, and maintainable state management, contributing to a 10% increase in sales through improved usability and performance.

• - Refactored a large monolithic frontend into multiple Micro-Frontends (MFE) using React and TypeScript, improving scalability, independent deployments, and team autonomy. Designed expressive, maintainable public type APIs and leveraged advanced TypeScript utility types to ensure strong type safety across shared modules.

• - Strengthened code quality by writing frontend tests, conducting code reviews, and supporting deployments and releases, promoting frontend best practices across the team and promoted as a Senior Frontend Engineer. Technologies used: React.js | TypeScript | JavaScript | Micro-Frontend Architecture | Redux/Context | REST APIs | Ad-Tracking Pipelines | Webpack | HTML5 | CSS3 | Jest | Mapbox | zustand | styled components | cypress integration tests | GraphQL | Sonarqube | Vite

Product: Ark.re is a UK startup offering a survey platform (Shape) to measure and improve the performance of employees and teams used by 150+ companies (4k+ employees) with more than 20k+ daily logins.

• - I was working in an agile team of 10 developers, 3 designers and 2 product managers to develop 20+ new user facing features using React, Redux and Typescript.

Project: Restart Consulting is a UK based health care provider offering a navigation platform (Viper360) to streamline communication between patients and healthcare providers used by 50+ hospitals (25k+ users).

• - I was working in an agile team of 4 developers responsible for migrating the project user interfaces from Jquery to React & TypeScript with an interactive UI. Integrated 20+ Rest APIs with React and developed 15* reusable components.

• - Migrated a multi-page UX into a single page app which improved customer engagement by 8%.

• - Architected product tours with React for a new feature that improved customer adoption by 22% leading to $1.1M in incremental revenue. Created a custom client dashboard that reduced support tickets by 50%. Technologies used: JavaScript | React | Typescript | Redux | Jquery | Jest | HTML5 | CSS3.