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coolhemant777

Hemant Soni

@coolhemant777
India
About me
I’m a MERN Stack Engineer with 4+ years of experience building scalable web applications, backend systems, and production-ready APIs for startups and businesses. I specialize in developing high-performance applications using Node.js, NestJS, React.js, MongoDB, PostgreSQL, and modern cloud technologies. My focus is not just writing code, but building reliable systems that are scalable, maintainable, and optimized for real-world usage.... Read more

Skills

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coolhemant777
Hemant Soni
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API & Integrations
I will ai, whatsapp automation, n8n, openai, apis, backend development
From$80 / projectMore details

Portfolio

Work experience

Tata_Consultancy Services

Software Engineer

Tata Consultancy Services • Self-employed

Apr 2024 - Apr 2026 • 2 yrs

• Reduced API response time from 3s to 300ms by introducing targeted Redis caching for frequently accessed endpoints. • Implemented CI/CD pipelines reducing manual server deployment time from 16 minutes to 3 minutes (81% faster). • Mentored a team of 4 junior developers, supporting task planning, client communication, and timely delivery. • Built a real-time chat system with audio and video calling, live messaging, user interactions along with permissions. • Implemented an Instagram-style story feature for posting and viewing time-limited content for users. • Implemented MongoDB geospatial queries to efficiently fetch and assign nearby technicians for faster customer service. • Optimized MongoDB and improved query performance by 20% using efficient time-series collections and TTL indexes. • Built QR code–based onboarding backend APIs for IoT devices, enabling self-onboarding and removing all manual setup. • Improved sensor data storage by archiving historical records to Amazon S3, cutting server SSD usage and costs by 40%. • Built an event-driven workflow using S3, SNS, and SQS to track file operations, background jobs and inter-service communications. • Used Strategy pattern to switch authentication based on configuration, making the auth flow extend and maintainable. • Created a SolidWorks plugin to export parts and images via secure API keys, enabling data transfer to external systems. • Integrated Stripe billing and webhooks to automate subscription lifecycle events and payment status updates. • Implemented PLM part sharing with external manufacturers, remove manual coordination and automate collaboration.