Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

Full-stack software engineer with 3+ years of experience building scalable web and mobile applications across fintech, e-commerce, gaming, and blockchain. Skilled in React, Next.js, NestJS, JavaScript, and TypeScript, with strong backend architecture experience designing secure REST APIs and high-performance systems. Experienced in blockchain and fintech integrations, including payment workflows (Stripe), transaction reliability improvements, and multi-chain coin functionality. Proficient with AWS, Docker, CI/CD pipelines, and building responsive UIs with Tailwind CSS; also experienced deploying and maintaining production-grade services.…Full-stack software engineer with 3+ years of experience building scalable web and mobile applications across fintech, e-commerce, gaming, and blockchain. Skilled in React, Next.js, NestJS, JavaScript, and TypeScript, with strong backend architecture experience designing secure REST APIs and high-performance systems. Experienced in blockchain and fintech integrations, including payment workflows (Stripe), transaction reliability improvements, and multi-chain coin functionality. Proficient with AWS, Docker, CI/CD pipelines, and building responsive UIs with Tailwind CSS; also experienced deploying and maintaining production-grade services.

Hamza Masood

Full Stack Developer, Software Engineer, Back-End Developer, +3





Full-stack software engineer with 3+ years of experience building scalable web and mobile applications across fintech, e-commerce, gaming, and blockchain. Skilled in React, Next.js, NestJS, JavaScript, and TypeScript, with strong backend architecture experience designing secure REST APIs and high-performance systems. Experienced in blockchain and fintech integrations, including payment workflows (Stripe), transaction reliability improvements, and multi-chain coin functionality. Proficient with AWS, Docker, CI/CD pipelines, and building responsive UIs with Tailwind CSS; also experienced deploying and maintaining production-grade services.…Full-stack software engineer with 3+ years of experience building scalable web and mobile applications across fintech, e-commerce, gaming, and blockchain. Skilled in React, Next.js, NestJS, JavaScript, and TypeScript, with strong backend architecture experience designing secure REST APIs and high-performance systems. Experienced in blockchain and fintech integrations, including payment workflows (Stripe), transaction reliability improvements, and multi-chain coin functionality. Proficient with AWS, Docker, CI/CD pipelines, and building responsive UIs with Tailwind CSS; also experienced deploying and maintaining production-grade services.

Available to hire

Full-stack software engineer with 3+ years of experience building scalable web and mobile applications across fintech, e-commerce, gaming, and blockchain. Skilled in React, Next.js, NestJS, JavaScript, and TypeScript, with strong backend architecture experience designing secure REST APIs and high-performance systems.

Experienced in blockchain and fintech integrations, including payment workflows (Stripe), transaction reliability improvements, and multi-chain coin functionality. Proficient with AWS, Docker, CI/CD pipelines, and building responsive UIs with Tailwind CSS; also experienced deploying and maintaining production-grade services.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Beginner

Language

English

Fluent

Work Experience

Senior Software Engineer at Devsin c

May 1, 2025 - Present

Led development and delivery of scalable web applications using React and Next.js, improving release stability through Agile practices, code reviews, CI/CD pipelines, and automated testing. Designed and architected backend systems with NestJS and Node.js, building secure APIs and blockchain-integrated services. Resolved critical blockchain transaction concurrency issues causing double-spend conflicts by redesigning transaction handling and reducing failure rates from 10% to 0%. Built and deployed blockchain-enabled infrastructure, implementing stable coin integrations and secure transaction flows. Developed real-time analytics dashboards using Highcharts/Chart.js for actionable operational insights. Implemented secure Stripe payment workflows to improve checkout reliability and reduce failed transactions. Dockerized applications and managed AWS infrastructure (EC2, S3, RDS), supporting scalable deployments and production-grade environments. Translated Figma designs into pixel-perfect,

Senior Software Engineer at Devsin c (May 2025 - Present)

May 1, 2025 - Present

Led development and delivery of scalable web applications using React and Next.js, improving release stability via Agile practices, CI/CD pipelines, code reviews, and automated testing. Designed and architected backend systems using NestJS and Node.js to build secure REST APIs and blockchain-integrated services. Resolved critical blockchain transaction concurrency issues causing double-spend conflicts by redesigning transaction handling, reducing failure rates from 10% to 0%. Built and deployed blockchain-enabled infrastructure including stable coin integrations and secure transaction flows. Developed real-time analytics dashboards using Highcharts and Chart.js. Implemented secure Stripe payment workflows to improve checkout reliability and reduce failed transactions. Dockerized applications and managed AWS infrastructure (EC2, S3, RDS) for scalable deployments and production environments. Translated Figma designs into pixel-perfect, responsive UIs ensuring cross-device performance and

Software Engineer at Devsin c

May 1, 2023 - April 30, 2025

Implemented server-side rendering (SSR) with Next.js to improve SEO performance and page load speeds, while building responsive, scalable UIs using Material UI, Tailwind CSS, and ShadCN/UI. Optimized React application performance using memoization and hooks (React.memo, useMemo, useCallback), code splitting, and lazy loading to reduce bundle size and improve load times. Built and maintained RESTful APIs with Node.js and PostgreSQL, integrating third-party services including Stripe, Twilio, OAuth, and Slack for secure payments and real-time communications. Implemented distributed job processing with RabbitMQ and pg-boss to handle high-concurrency workloads with reliable retries and background task management. Improved user onboarding and feature adoption using LaunchDarkly feature flags and Shepherd.js guided tours, increasing activation rates and reducing support requests. Deployed and managed applications across Vercel, Heroku, and GitHub Pages, handling environment configuration, m

Software Engineer at Devsin c (May 2023 - April 2025)

May 1, 2023 - April 30, 2025

Implemented server-side rendering (SSR) with Next.js to improve SEO and page load speeds while building responsive, scalable UIs using Material UI, Tailwind CSS, and ShadCN/UI. Optimized React app performance via memoization (React.memo, useMemo, useCallback), code splitting, and lazy loading to reduce bundle size and improve overall load times. Built and maintained RESTful APIs using Node.js and PostgreSQL, integrating third-party services such as Stripe, Twilio, OAuth, and Slack for secure payments and real-time communications. Implemented distributed job processing using RabbitMQ and pg-boss for high-concurrency workloads with reliable retries and background task management. Improved user onboarding and feature adoption using LaunchDarkly feature flags and Shepherd.js guided tours to increase activation rates and reduce support requests. Deployed and managed applications across Vercel, Heroku, and GitHub Pages, handling environment configuration, monitoring, and production stability