Muhammad Shahnewaz

I’m a Software Engineer with 5 years of professional experience building scalable enterprise multi-tenant SaaS and AI-integrated web applications. I led frontend architecture and product delivery for high-reliability platforms serving 70,000+ users, with a strong focus on scalable system design and modern CI/CD workflows. I bring hands-on expertise in React, Next.js, distributed systems, frontend performance engineering, and microfrontend architecture.

At Gain Solutions, I led development of multiple SaaS products—including CRM, HRM, Sales, and Customer Support—owning feature planning, technical decisions, and delivery for systems serving 70k+ users with zero downtime. I reduced release time and engineering costs through product decisions, workflow improvements, urgent production fixes, and critical business logic discussions. I also reduced production bugs and manual QA by adding unit, integration, and E2E tests covering 96% of key user scenarios using Vitest, React Testing Library, Playwright, and MSW in CI/CD pipelines.

I improved Core Web Vitals from 2s to 0.5s through code splitting, tree-shaking, and build optimizations, and reduced large JavaScript and CSS bundles by improving Webpack and Rollup configurations. I built and maintained real-time features like dashboards, notifications, activity logs, timeline calendars, email features, distributed widgets, settings management, CMS integrations, and subscription flows—while managing deployments and CI/CD pipelines on AWS. I implemented product analytics with Google Analytics and strengthened security with WAF, CSP, and security monitoring, and I integrated AI-powered CV screening and job information refinement using Gemini to automate recruitment workflows.