Maisam Shah
Verified Expert in Engineering
Full-stack Developer
Lahore, Punjab, Pakistan
Toptal member since July 6, 2022
Maisam is a solution-focused and goal-oriented software engineer with over seven years of experience in commercial application development, over five years in front-end React Native development, and more than four years in back-end development. He is passionate about finding simple, efficient solutions to complex problems. Maisam demonstrates strong analytical and problem-solving skills and the ability to follow through with projects from inception to completion.
Portfolio
Experience
Availability
Preferred Environment
Windows, MacOS, Slack, Skype
The most amazing...
...thing I've worked on is developing an online marketplace application for e-vouchers from top retailers around the world with over 500,000 active users.
Work Experience
Senior Mobile Engineer
Reward Gateway, Limited
- Led the development of a hybrid mobile application that increased user engagement by 20% by implementing redeemable vouchers, leveraging React Native and GraphQL for optimal performance.
- Implemented checkout flows using Checkout.com, ensuring full compliance with PCI DSS regulations to protect sensitive cardholder data.
- Increased successful transactions by 25% by developing and optimizing checkout flows within the app.
- Attended yearly PCI compliance meetings to stay updated with the latest standards and best practices, ensuring all systems and processes adhered to industry regulations.
- Integrated Apple Pay and Google Pay using Checkout.com, enhancing the user experience with additional secure payment options.
- Enhanced app performance by nearly 40% through the implementation of GraphQL for data management and caching.
- Improved user retention by 15% using Google Analytics to track and optimize user journeys.
- Assisted in publishing apps to Google and Apple app stores, ensuring seamless deployment.
Full-stack Web and Mobile Application Developer
An Online Freelance Agency
- Developed custom solutions for Apple Pay and Google Pay integration using Node.js, tailoring the functionality to meet specific business needs.
- Gained a deep understanding of PCI compliance requirements and seamlessly integrated Stripe into various platforms, ensuring secure and compliant payment processing.
- Worked on a blockchain-backed mobile application. Handled transactions between fiat and cryptocurrency. Implemented Figma designs with great accuracy.
- Implemented PayPal integration for a cutting-edge crypto finance application, enabling secure and efficient transactions for users.
- Worked on mobile applications for the maintenance of a factory machine. Familiarized myself with the client's code quickly and provided efficient and fast output and results.
- Managed and worked on three projects for the client simultaneously. Implemented feature updates and resolved bugs while understanding the immense code bases of multiple projects.
Senior Software Engineer
Tkxel
- Optimized existing React codebases to reduce load times and enhance user experience.
- Handled the customization of clients' systems, including functional requirements documentation, use cases, actual coding, and unit testing.
- Identified issues, analyzed information, and provided solutions to problems.
- Supervised the work of contracted employees to stay on task for timely completion.
Senior Technical Content Engineer
Educative
- Led multiple teams of engineers to attain the desired goal within the expected time frame.
- Worked closely with the technical team, product managers, and CEO to strategize and plan new courses and their impact on the development of society.
- Interviewed and mentored employees and new engineers on the team.
Software Developer
An online freelance agency
- Worked on three cross-platform mobile applications using React Native + Redux with Material UI.
- Developed an app that utilizes an Uber-like functionality to connect to users with live tracking. This was achieved through the APIs provided by Google.
- Worked on both WebRTC and Twilio to enable in-app audio/video calling for multiple applications.
- Used Firebase functions to enable push notifications and automatic data updates.
- Worked with Redux for global state management and Redux Thunk to handle asynchronous calls as middleware.
- Gained a deep understanding and working experience in object-oriented JavaScript programming and the MVVM design pattern.
Experience
SmartSpending
https://play.google.com/store/apps/details?id=com.rewardgateway.mob_04&hl=enEdenred Discounts
https://play.google.com/store/apps/details?id=com.rewardgateway.mob_04_edenred&hl=enCoSafe
https://play.google.com/store/apps/details?id=com.cocrisis.live&hl=en&gl=USDesigned by crisis management experts and customized for building safe, resilient, and sustainable organizations. The platform helps organizations keep employees safe and informed by ensuring that the right information reaches the right person at the right time. I was the front-end developer in charge of designing interactive UI screens. I also managed the API integration to organize and display complex, real-time data to the users.
Finay Web and Mobile App
http://apps.apple.com/pk/app/finay/id1613395121As the full-stack developer, I led this application's development, testing, and deployment. Also, I successfully implemented PayPal integration, enabling secure and efficient transactions for users. This mobile app was published on the App Store. Additionally, I managed and oversaw the tasks of the blockchain developer and ensured timely delivery to the client.
Smart Factory
https://apps.apple.com/pk/app/smart-factory/id1510565698Education
Bachelor's Degree in Computer Science
National University of Computer and Emerging Sciences - Lahore, Pakistan
Certifications
Application Security – The Complete Guide
Udemy
Learn HTML, CSS, and JavaScript from Scratch
Educative
Skills
Libraries/APIs
React.js, Node.js, React Navigation, REST API, Google Maps Development, Stripe Development, React Query, Apple Subscriptions, Stripe Development, SOAP APIs, API Development, SQL, WebRTC, jQuery, Pandas, TensorFlow, AWS Amplify, JavaScript, Shopify API, D3.js
Tools
Slack Development, Skype, Figma, Xcode, Android, Google Places SDK, Expo, ChatGPT, GitHub, Redux Toolkit, Firebase Authentication, React Native, Git, Amazon Cognito, Jira, Auth0, NPM, MongoDB, Stripe Development, Webpack, Sequelize, Prisma, Docker Compose
Languages
JavaScript, TypeScript, HTML, CSS, SQL, Python, SCSS, GraphQL, Python, JavaScript, C++, Java, Swift
Frameworks
React Native, Redux, Next.js, Tailwind CSS, Material UI, Swagger, Selenium, Express.js, Bootstrap, Django, Jest, Svelte
Paradigms
Agile Development, UI Design, UX Development, Mobile App Design, Microfrontends, Responsive Web Design, Testing, DevOps, SEO
Platforms
Windows Development, MacOS, Web Development, AWS, Firebase, Mobile App Design, AWS Lambda, Twilio Development, Android, iOS, Heroku, DigitalOcean, Cloud Engineering, Vercel, Docker, Jupyter Notebook, Shopify, RevenueCat, Blockchain
Storage
PostgreSQL, MySQL, Firestore, NoSQL, Database, SQL Server, Database, MongoDB, Google Cloud Development, Amazon S3, Redis, AWS
Industry Expertise
Social Media Marketing
Other
Full-stack, Mobile Web, Front-end, Back-end Developers, APIs, Design, Firebase Cloud Functions, Full-stack, Front-end Development, UI Development, Mobile App Design, Generative Pre-trained Transformers (GPT), Maps, HTTPS, MERN Stack, API Integration, App Store Development, Google Play Store, Subscriptions, Stripe Subscriptions, Communication Coaching, Design Systems, Styled-components, Mobile Apps, Architecture, Financial Software Development, Startup Development, Front-end Architecture, Google Cloud Functions, In-app Purchases, Mobile Architecture, Payment Gateways, Axios, JSON REST APIs, Wireframing, Mobile App Design, Material Design, Mobile First, Deployment, Version Control, Cross-browser Compatibility, System Security, Social Networks, Social Networks Development, App UI, Authorization, Payment Processing, Apple Pay Development, Google Pay, Back-end Developers, Leadership, UI Development, Apollo, React Native Reanimated, Mobile App Design, Supabase, Checkout, Payment APIs, Caching, Lazy Loading, Localization, UX Development, Software Architecture, Location Tracking, Data Visualization, OpenAI, OpenAI GPT-3 API, GPT-4, E-commerce marketing, Cloud Infrastructure, Tailwind UI, Chrome Extension Development, Artificial Intelligence, Image Processing, Machine Learning, FastAPI, Animation Development, CI/CD Pipelines, PayPal Development, ChatGPT API, Web3, Web Development, UI Development, Web UI, Security, PCI DSS, Storybook, SvelteKit, Cryptocurrency, Crypto
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