Chirag Sonar
Fullstack Engineer | SDE 1
About
I’m a Full-Stack Software Engineer with 3 years of experience building scalable B2B SaaS applications, specializing in frontend engineering, UI/UX design, and product development. I work primarily with React, Next.js, TypeScript, Node.js, Express.js, MongoDB, PostgreSQL, MySQL, and GraphQL.
I enjoy building products end-to-end—from understanding requirements and designing intuitive user experiences to architecting applications, integrating APIs, managing data, and delivering polished, production-ready interfaces. I have hands-on experience with UI/UX design, wireframing, and high-fidelity prototypes using Figma and Framer, followed by implementation with reusable, accessible, and responsive components.
I’m passionate about solving complex problems, building clean and maintainable systems, optimizing performance, and creating user-friendly products that balance thoughtful design with strong engineering.
Skills
Experience
Software Development Engineer 1 at ContractSPAN Inc
Apr 2023 — Apr 2026
Remote · full time
- Designed and led frontend architecture for a Contract Lifecycle Management (CLM) and Business Intelligence platform serving 2000+ users across 5 enterprise clients.
- Took full ownership of a custom rich document editor module built on Meta’s Lexical framework; implemented custom nodes, transformers, and validation logic for real-world contract authoring workflows..
- Built a full e-signature system supporting typed, drawn, and uploaded signatures with audit trails and multi-role approval flows - managing complex async state across concurrent users.
- Improved Lighthouse scores from 45% to 99%+ and reduced Time to Interactive by 45% via code-splitting, lazy loading, Webpack bundle optimisation, and profiling with React Profiler and Memory Profiling tools.
- Built production data visualisation interfaces using Recharts - multi-metric BI dashboards, dynamic alert states, and time-series displays supporting real-time reporting workflows
- Built and maintained a shared design system and reusable component library from scratch using component-driven development principles and established architecture patterns adopted across the full platform.
- Leveraged Next.js SSR and ISR strategies, alongside RESTful and GraphQL-based data fetching, to optimise data freshness and page load performance across dynamic, data-heavy views.
- Applied WCAG accessibility guidelines and semantic HTML practices across enterprise-facing interfaces for improved usability and compliance.
- Led end-to-end UI/UX design using Figma and Framer - wireframes, interaction flows, and high-fidelity mockups implemented directly in production code.
- Mentored junior developers, conducted code reviews, and established frontend standards around performance, debugging, and component design
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