I am a React-focused developer working on both mobile and web applications with a portfolio full of both. I have experience with a wide range of languages, database systems and structures and have built projects from the ground up to completion as well as adapted to large legacy code bases.

Sami Rahman

I am a React-focused developer working on both mobile and web applications with a portfolio full of both. I have experience with a wide range of languages, database systems and structures and have built projects from the ground up to completion as well as adapted to large legacy code bases.

Available to hire

I am a React-focused developer working on both mobile and web applications with a portfolio full of both. I have experience with a wide range of languages, database systems and structures and have built projects from the ground up to completion as well as adapted to large legacy code bases.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Beginner
Beginner
Beginner
Beginner
Beginner
See more

Language

English
Fluent
Bengali
Intermediate

Work Experience

Technical Operations Manager at Royz
April 1, 2024 - Present
Led the technical transformation of a growing car rental business, owning all customer-facing platforms and internal operational systems. Managed technical operations across a fleet of 15+ vehicles, supporting increased booking volume and operational growth. ● Designed, developed and deployed the production website using React, TypeScript and Vercel, implementing SEO optimisation, structured metadata and performance tuning to improve discoverability and conversion. ● Scaled annual revenue from £30k to £140k within two years by introducing digital booking optimisation, vehicle performance analytics and automated customer workflows. ● Engineered a custom booking and eligibility system integrating form validation, API-driven workflows and automated messaging, reducing manual intervention and improving response times. ● Built internal financial reporting and revenue-tracking tools, centralising data into structured dashboards to support operational decision-making. ● Improved site performance and UX, driving 1,000+ monthly visitors and increasing direct private rental conversions. ● Manage deployments, infrastructure and version control workflows.
Frontend Engineer (Part-Time) | VirtualE (Early-Stage Startup) at Virtual E
November 16, 2023 - Present
Spearheaded the rapid development of a full-featured admin onboarding system in just one week at this early-stage startup, collaborating with backend engineers and owning the front-end architecture. Delivered a seamless UX with state management, editable/sortable tables, form handling, and API integration — accelerating customer onboarding by several weeks. ● Designed and integrated a scalable notification system and Pomodoro timer feature in close coordination with the backend team, resulting in a 24% boost in user engagement through timely feedback loops and productivity tools. ● Partnered with the product team to transform research insights into intuitive, user-driven features, ensuring product direction remained tightly aligned with both user needs and business objectives. ● Modernised and refactored legacy front-end code, seamlessly integrating new features into the existing system while reducing technical debt. Improved load times by 30% through performance tuning, with a strong emphasis on code quality, maintainability, and scalability.
Freelance Developer – React & React Native at Freelance
October 16, 2022 - November 23, 2022
Built multiple web and mobile projects for various clients, from perfume to tuition companies, focusing on simplicity, responsiveness and meeting the targets set by clients. All the projects can be found in my portfolio (https://srmakes.co.uk) ● Delivered solutions across SEN services, education platforms, mobile applications and e-commerce businesses. ● Developed and maintained projects end-to-end, from initial planning and design to deployment and post-launch support. ● Built responsive, accessible, and user-friendly interfaces, ensuring seamless experiences across multiple devices. ● Applied best coding practices such as DRY, SOLID, and modular component-based architecture for maintainable and scalable codebases. Ensured high performance and optimised applications for speed, SEO, and accessibility. ● Integrated third-party services and APIs, including authentication (OAuth, Clerk), real-time databases (Relational & NoSQL), and analytics tools.
Developer at Threepipe Reply
October 18, 2021 - November 23, 2022
● Spearheaded the development of a dynamic Alteryx/Python/SQL automation leveraging data source APIs, resulting in a 60% increase in productivity for the SEO team, alongside collaboration with many other internal teams for their automations ● Leveraged Python and Pandas for efficient data manipulation and analysis, ensuring accurate insights extraction. Developed a comprehensive tool for analysing marketing trends and identifying AD units, streamlining data collection and storage into a centralised spreadsheet from sources such as TikTok, Snapchat and Facebook.

Education

Bachelor of Science: Computer Science at Queen Mary University of London
September 17, 2017 - July 24, 2020

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Transportation & Logistics, Computers & Electronics
    paper Royz Rental | Full Website and Booking System

    Designed, developed, and hosted a customer-centric car rental website with modern UI and responsive design; implemented SEO
    strategies and ensured cross-browser compatibility to enhance user engagement and drive significant conversion rates.

    uniE621 Foodii | Website
    To bring a flow of potential users to my mobile application, having an online presence in the form of a website was key. This website was built with React Js and is built to be super fast, with all the necessary information in unique ways, but most importantly focusing on the CTA which is for users to go and download the application.
    uniE621 Foodii | Mobile App
    This mobile application was entirely self-built by myself from the ground up using React Native and Expo with Supabase as the database. It is a massive project which showcases an array of various skills, from gesture handling, offline first capabilities, modals, Google Maps, tabs, drawers, navigation, camera usage and so much more. It has given me great confidence in building further applications from scratch with greater capabilities and features.
    uniE621 Tutor Website React Js
    Using React Js and CSS with a few other smaller packages I created a lightweight, responsive and highly informative website for a client who wanted to display their tuition services. Colour Scheme, animation, context, forms and other details were added into making this website flow nicely, allow users to understand what is on offer and to then contact the client easily when needed
    uniE621 Admin Dashboard
    Built and deployed a React Admin Dashboard App With Theming, Tables, Charts, Calendar, Kanban and many more features using the syncfusion library as well as tailwind CSS as the main building blocks. The project also used React Context API, was completely responsive, and had dark and light themes, using modern UI and folder structure practices. webdesigner react reactcontext dashboard
    uniE621 Travel Advisor Website
    Using React and Google API I created a website which takes the location of the user, or any search input and then displays potential hotels, restaurants or attractions that the user can visit. The UI is done mainly with Material UI, using React best practices, allowing for filters of rating, clicking on the map directs you to further info on the location and many more intuitive features. I used this project to become familiar with using Maps API for a project currently being worked on for commercial development.

Hire a Web Developer

We have the best web developer experts on Twine. Hire a web developer today.