Headline

Senior Frontend Engineer | React, Next.js, TypeScript | Real-time Systems, Frontend Architecture & Performance | Bengaluru / Remote

About

Senior Frontend Engineer with 6+ years of experience building scalable production applications with React, Next.js, TypeScript, and JavaScript. I specialize in real-time systems, frontend architecture, performance optimization, micro-frontends, design systems, and AI-assisted development workflows. At Radius, I have: • Built a real-time chat module using WebSockets • Architected an Auditor Dashboard enabling $500K in quarterly cost optimization • Reduced initial load time by 18% in a legacy React-Redux codebase • Reduced production bugs by 40% through improved testing and QA practices • Improved feature delivery speed by 25% through reusable frontend architecture Previously, at Resonately, I built an offline-first healthtech platform with 0% data loss and 99.9% uptime, using React, Next.js, IndexedDB, MediaRecorder, and Server-Sent Events. At Wint Wealth, I optimized multi-gateway payment flows using Razorpay, CCAvenue, and BillDesk, increasing transaction success rates by 30%. My core strengths include React, Next.js, TypeScript, WebSockets, SSE, Redux, Zustand, React Query, Jest, React Testing Library, Vite, Webpack, SSR/SSG, accessibility, and frontend system design. I’m open to Senior Frontend Engineer, Lead Frontend Engineer, and Frontend Architect opportunities in Bengaluru or remote. I’m especially interested in teams solving complex product, performance, and real-time engineering problems.

Location

Bengaluru

AI stack

antigravity

claude code

claude

codex

cursor

gemini

Work experience

SDE - 2 - Frontend Development at Radius (formerly Agentdesks), Feb 2025 - Present · 1 y 7 mo, Bengaluru, Karnataka, India, • Led end-to-end development of a real-time Chat Module from scratch using WebSockets, enabling scalable real-time communication for agents across the platform. • Led development of multiple key dashboards (Clients, Transactions, Auditor), architecting reusable components and improving usability + data accessibility for real estate agents. • Designed and shipped the "Set Signing Order" feature, integrating seamlessly with DocuSign APIs for complex multi-signer workflows. • Debugged and optimized performance in a complex, 9-year-old legacy React + Redux-Saga codebase, improving stability and maintainability across critical modules. • Refactored large portions of the UI into modular, reusable components using React best practices, accelerating feature delivery by 25% and improving long-term maintainability. • Reduced production bugs by 40% through deep QA cycles, regression testing, and targeted code clean-up. • Spearheaded performance optimization using lazy loading, memoization, and virtualized lists, cutting initial load time by 18% on the legacy codebase. • Introduced test coverage improvements with Jest, enabling safer deployments and faster CI feedback loops.

Senior Software Engineer at Resonately, Apr 2024 - Jan 2025 · 10 mos, Remote, • Architected an offline-first architecture using MediaRecorder API and IndexedDB in React, delivering 0% data loss even during connectivity outages. • Built real-time transcription workflows for doctors using Server-Sent Events (SSE), increasing productivity by 40% and streamlining post-appointment processes. • Integrated Mixpanel for user analytics (15% feature adoption lift) and Slack-Sentry for crash monitoring (50% reduction in downtime). • Ensured platform scalability to support 5,000+ daily appointments with 99.9% uptime in an early-stage healthcare SaaS environment. • Developed a real-time search and analysis tool using React.js and REST APIs, leveraging LangChain + OpenAI to analyze patient feedback and help manufacturers improve hearing aid products. • Created monitoring dashboards to track transcription accuracy and system performance, reducing operational bottlenecks by 30%.

SDE - 2 - Frontend Development at Wint Wealth, May 2023 - Mar 2024 · 11 mos, Bengaluru, Karnataka, India, • Implemented and optimized the payment flow for fixed deposits by integrating multiple banks and payment gateways (CCAVenue, Razorpay), increasing transaction success rates by 30%. • Built the IpoKart product as sole developer, integrating multiple SME IPOs and creating visual graphs that improved user engagement by 25% within the first month of launch. • Created a proof-of-concept for cost-effective frontend error tracking using Mixpanel analytics, reducing debugging time by 40% and improving development efficiency across the team. • Conducted technical interviews for frontend candidates, improving hiring process efficiency by 20% and ensuring top-tier talent joined the team. Skills (bottom of role): Payment Gateways, API Integration, React.js, Next.js, Mixpanel, Frontend Observability

SDE - 1 - Frontend Development (Early) at Wint Wealth, Aug 2021 - May 2023 · 1 yr 10 mos, Bengaluru, Karnataka, India, • Single-handedly architected and developed the SGB investment platform in Next.js, implementing SSR for improved performance and SEO, and establishing a CI/CD pipeline with AWS Amplify. • Optimized website performance by refactoring CSS, JavaScript, and webpack configuration, increasing page load speed by 32%. • Created and documented frontend development guidelines, promoting code consistency and seamless collaboration for new developers. • Revamped the bonds investment platform in Gatsby with a new design system, increasing user footfall by 20%. • Built visual dashboards for tracking referrals and investments across asset types, streamlining tax calculations and reporting. • Supported the CX team by troubleshooting customer issues in virtual meetings and delivering timely solutions. Skills (bottom of role): Next.js, SSR, CI/CD, AWS Amplify, React.js, Gatsby, Webpack, Performance Optimization

Team Lead - UI Development at Eunimart, Mar 2021 - Jul 2021 · 5 mos, Hyderabad, Telangana, India, Key accomplishments include: * Spearheaded the development of a sophisticated B2B application utilizing Micro Frontend Architecture with Angular, enhancing user experience for multiple user roles across the platform. * Successfully converted an existing jQuery application to Angular, improving performance and maintainability while reducing load times by 30% through optimized coding practices. * Designed and implemented access controls for the website that effectively restricted user roles based on business logic requirements, increasing security compliance by 40%. * Collaborated with cross-functional teams to redevelop a client’s application featuring complex logic and high security standards while integrating a custom-developed CMS for seamless content management. * Recognized as “Employee of the Month” and “Employee of the Quarter” for outstanding contributions to project success and team leadership during tenure. Skills: Micro Frontend Architecture, Angular Development, User Role Management

UX / UI Developer at Eunimart, Oct 2019 - Mar 2021 · 1 yr 6 mos, Greater Hyderabad Area

UI Developer (Intern) at Algonox Technologies, Dec 2018 - May 2019 · 6 mos, Greater Hyderabad Area, I started as software developer intern in Algonox where I got to work on multiple projects with multiple technologies like jQuery,Angular where in I had developed dynamically programmed web apps with REST API integration. I used coordinates from Open CV image recognition from REST API to draw certain highlights on PDFs in frontend both in jQuery and Angular. - Worked on jQuery for creating AI Based tool - Using Angular created Admin Dashboard - Integrated with REST APIs - Worked on libraries that are useful for drawing on PDFs in web

Education

Bachelor of Technology, Computer Science, kl university

Sri Chaitanya College of Education

Public links

github: https://github.com/machirajusaisandeep

sandeepmachiraju.com: https://www.sandeepmachiraju.com/