MAHADI HASAN SOURAV

Optimizely Visual Editor

• A WYSIWYG editor enabling marketers and developers to visually modify website elements for A/B tests, Personalization Campaigns, Multi-Armed Bandit, and Multivariate experiments.
• Built as a Micro Front End application using Module Federation, allowing seamless integration with Optimizely's experimentation platform.

Optimizely Web Experimentation

• Enterprise-grade experimentation platform powering A/B testing, feature flags, and personalization for digital experiences at scale.
• Led development of high-performance experimentation dashboards, reducing initial load time by ~35% through code splitting, lazy loading, and memoization.

MRCS Web App

• A platform for MRCS medical exam where a separate admin panel helps organizing questions and results.
• Developed core UI components using NEXT.js, Postgres, Prisma and Neon ensuring high performance and accessibility across browsers.

Prescription App

• A comprehensive prescription management platform designed for doctors and hospitals to streamline patient care workflows.
• Enables quick creation and customization of digital prescriptions with easy medication and investigation lookup functionality.

Color Picker for React

• A customizable color picker component for React applications.
• Supports various color formats (HEX, RGB, HSL) and includes features like alpha transparency, color history, and copy to clipboard.

• Led design and delivery of high-performance frontend features across Optimizely's experimentation suite — A/B Testing, Personalization Campaigns, Multi - Armed Bandit, and Multivariate Tests.
• Partnered with product, design, and backend to scope and ship complex experimentation UI workflows with strong accessibility(WCAG/ ARIA) and responsive behavior.
• Architected reusable UI component libraries and internal developer tooling adopted across teams, lifting frontend consistency and engineering velocity.
• Cut initial dashboard load time by ~35% via code splitting, lazy loading, and memoization; established perf budgets and profiling practices for the team.
• Mentored mid- and junior-level engineers through code review and design discussions; authored onboarding docs to shorten ramp- up for new hires.
• Set technical direction via RFCs and component API design, and led frontend vulnerability remediation to harden shared libraries.

• Developed and maintained high-performance, user-focused frontend features for experimentation and personalization platform such as A/B test, Personalization Campaign, Multi ArmedBandit, MultiVariatetests etc
• Partnered with product managers and designers to rapidly prototype and ship A/B testing UI components, ensuring accessibility and responsiveness across devices.
• Created reusable UI libraries and internal tools that improved frontend developer velocity and consistency across teams.
• Optimized performance for large-scale experimentation dashboards, reducing initial load time by 35% through lazy-loading strategies and memoization.
• Contributed to resolve vulnerabilities, internal documentation and on boarding materials to support knowledge sharing and team growth

• Wrote clean and dynamic code, leveraging expertise across multiple programming languages such as React, React-Native, Redux, Mobx, Node js, C#, F#, Dot net, SQL etc. to meet diverse requirements.
• Kept pace with changing coding standards and requirements and maintained updated software.
• Evaluated project requirements, identified challenges and proposed alternatives using research and data.
• Contributed to sprint planning, prioritizing backlogs to meet new demands
• Exceeded client expectations for software function, performance and features by working closely with product and quality assurance teams.
• Developed testable software using agile methodologies to create high-quality deliverables.

Pomodoro Time Counter

• A React-Native-Expo application that runs on both IOS and Android
• Helps to focus using different countdown with breaks

Pattern the App

• Contributed on creating dynamic components and animated UI
• Developed several features including cart grouping, addons, rewards, login, geolocation capture, FB SDK integration etc.

Chaldal website

• Developed with ReactJS, Node JS, Typesctipt, SQL, Dotnet Core, C#, F#, SQL, Service Fabric
• Contributed most of the new features like Mulcity support, Address updation, Chaldal Credit, Recipes, Donation, Refund, Due payment, Geolocation etc.

Chaldal App, IOS & Android

• Developed with React Native, Mobx, Typescript
• Used advanced features like deep linking, push notification, geolocation, camera access etc.

Chaldal Vegetable Network

• The Chaldal Vegetable Network is a valuable initiative that aims to empower farmers and consumers, promote sustainable agriculture, and contribute to food security in the region.
• Features include farmer registration, product listing, order management, and payment processing.

Chaldal Food Aid

• Chaldal Food Aid is a platform that allows users to donate food items to those in need, supporting the community and promoting social responsibility.
• The app provides a user-friendly interface for donors to contribute food items and track their donations including features include food item listing, donation tracking, and user authentication.

Chaldal Voting System

• It's an internal voting system for Chaldal employees to vote for various purposes like employee of the month, project selection etc.
• Features include user authentication, voting management, and result tracking.

• Participated in pre-project analysis and technical assessments to validate creation of user-friendly interface.
• Built reusable code to utilize for other projects and to minimize costs.
• Designed layout and graphics to enhance aesthetics and appearance of the app.
• Managed project and web strategic planning for entire team.
• Responded to queries on private messages or comments to address issues and resolve complaints

• Helped team complete smooth, professional software deployments using React, React React-Native, Node js, Mongo DB, Couch DB, Pouch DB.
• Managed team resources to deliver on sprint goals within expected timeframes.
• Aligned projects with requirements and specifications to deliver above-benchmark results.
• Supported software code review, system integration and validation in line with company and regulatory requirements.
• Built and maintained code libraries used to produce consistent and reliable code.

• Used to develop website using CodeIgnitor, Javascript, PHP and Mysql.

Keith Treu

Director, Software Engineering

Optimizely

keith.treu@optimizely.com

Tejas Viswanath

CTO & Founder

Chaldal Limited

tejas@chaldal.net