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Avinash Kumar

Backend Software Engineer | Node.js | TypeScript | PostgreSQL | MongoDB | GraphQL | AWS | Azure | System Design | Salesforce CPQ & Web3

Mumbai

4+ years of work experience

Sigma Solve, Inc.
Jan 20251 yr 3 mosMar 2026

Remote

Developed scalable Next.js API backend integrated with Salesforce CPQ and Supabase. Built APIs for Excel/CSV bulk data imports for pricing and discount management. Integrated Azure Blob Storage with signed URLs for secure file uploads. Implemented Salesforce webhooks to sync Accounts, Contacts, Opportunities, and Quotes. Developed automated email notifications using Resend API for quote updates. Implemented cron jobs using Supabase / PostgreSQL (pg_cron) to automate tasks such as quote expiration and scheduled data updates.
Biz Technologies IT Solutions Ltd
Mar 20231 yr 11 mosJan 2025

Mumbai

Introducing Decentrawood, the innovative Marketplace designed for the seamless creation, buying, and selling of Virtual Lands and city collections. Experience a cutting-edge platform that not only facilitates transactions but also accelerates data loading, reducing processing time by an impressive 10%. Welcome to a new era of efficiency in the virtual land. Technologies: JavaScript,Node.js, Express.js, MongoDB, IPFS.
Biz Technologies IT Solutions Ltd
Mar 20231 yr 10 mosDec 2024

• Architected full backend for a Web3 marketplace supporting NFT trading, virtual land ownership, and digital asset transactions with smart contract integration on the blockchain. • Developed decentralized REST APIs for scalable asset discovery, transaction processing, and ownership verification, inspired by patterns from large-scale virtual ecosystems like Decentraland. • Integrated IPFS with MongoDB for a hybrid storage layer – IPFS for immutable asset data, MongoDB for structured metadata – and optimized queries to reduce API response time by 10–15%. • Led end-to-end backend ownership of asset lifecycle including minting, transfers, rental logic, and marketplace transactions with full blockchain and database consistency.
Red Roots India
Apr 20221 yrMar 2023

Mumbai

Developed and implemented a robust API for a bag shopping ERP, utilizing cutting-edge technologies such as Node.js, Express.js, PostgreSQL, and Apollo Client. With Apollo Client reduce the 25% DB cost. Collaborated with a team of developers to ensure seamless integration of the backend system, resulting in efficient and user-friendly functionality. Demonstrated passion for backend development by actively researching and implementing best practices, utilizing tools like Mocha for thorough testing, and ensuring high-quality code. Contributed to the enhancement of the overall user experience by optimizing API performance increase 20% faster and implementing secure data handling techniques.
Red Roots India Pvt. Ltd
Apr 20221 yrMar 2023

• Built and maintained scalable ERP backend systems using Node.js and PostgreSQL covering HR, sales, inventory, and vendor operations for a mid-sized enterprise client. • Developed an automated expense management module with multi-level approval workflows, reducing HR processing workload by 20% and improving finance team visibility. • Improved overall API performance by 20% through targeted query optimization, strategic indexing, and response caching, resulting in faster page loads and better UX. • Implemented role-based access control (RBAC) and secure JWT-based authentication, ensuring fine-grained authorization across all ERP modules and protecting sensitive employee data.
FunctionUp
Nov 20215 mosMar 2022

Developed and implemented a robust and scalable backend API for a shopping portal, similar to Flipkart, utilizing cutting-edge technologies such as Node.js, Express.js, and JavaScript. Leveraged MongoDB to efficiently manage and store data, ensuring seamless user experiences and smooth data retrieval. Employed bcrypt encryption for enhanced security and protection of sensitive user information. Demonstrated passion for full-stack development by successfully delivering a high-quality and user-friendly platform.

Education

Dr. A.P.J. Abdul Kalam Technical University

Bachelor of Technology - BTech, Computer Science

Dr. A.P.J. Abdul Kalam Technical University

20164 yrs2020

Intermediate, Mathematics

Sakaldiha Inter Collage Sakaldiha

20151 yr2016

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Headline

Backend Software Engineer | Node.js | TypeScript | PostgreSQL | MongoDB | GraphQL | AWS | Azure | System Design | Salesforce CPQ & Web3

About

I build backend systems that scale, perform, and solve real business problems — not just code that “works.” I’m a Backend Software Engineer with 4+ years of experience designing and building scalable applications using Node.js, TypeScript, PostgreSQL, MongoDB, and GraphQL. I’ve worked across ERP, Salesforce CPQ, SaaS, and Web3 products, helping teams deliver reliable, high-performance systems that support business growth. My focus is on backend architecture, API design, cloud integrations, and building solutions that remain maintainable as products scale. Throughout my career, I’ve delivered measurable results by improving system performance, optimizing database operations, and automating complex workflows. I reduced database costs by 25% through efficient data-fetching strategies, improved API response times by 20% using query optimization and caching, and increased bulk data processing efficiency by more than 30%. I’ve built REST and GraphQL APIs, event-driven systems, real-time synchronization services, large-scale import pipelines, and secure integrations with platforms like Salesforce CPQ, AWS, Azure, and Supabase. From Web3 marketplaces to enterprise pricing platforms, I’ve owned backend systems end-to-end. Today, I’m focused on building distributed, cloud-native backend systems and deepening my expertise in system design, microservices, and scalable architecture. I’m always interested in connecting with engineers, product teams, and organizations building meaningful technology at scale.

Location

Mumbai

Work experience

Software Engineer at Sigma Solve, Inc., Jan 2025 - Mar 2026 · 1 yr 3 mos, Remote, Developed scalable Next.js API backend integrated with Salesforce CPQ and Supabase. Built APIs for Excel/CSV bulk data imports for pricing and discount management. Integrated Azure Blob Storage with signed URLs for secure file uploads. Implemented Salesforce webhooks to sync Accounts, Contacts, Opportunities, and Quotes. Developed automated email notifications using Resend API for quote updates. Implemented cron jobs using Supabase / PostgreSQL (pg_cron) to automate tasks such as quote expiration and scheduled data updates.

Node.js Backend Developer at Biz Technologies IT Solutions Ltd, Mar 2023 - Jan 2025 · 1 yr 11 mos, Mumbai, Introducing Decentrawood, the innovative Marketplace designed for the seamless creation, buying, and selling of Virtual Lands and city collections. Experience a cutting-edge platform that not only facilitates transactions but also accelerates data loading, reducing processing time by an impressive 10%. Welcome to a new era of efficiency in the virtual land. Technologies: JavaScript,Node.js, Express.js, MongoDB, IPFS.

Javascript Developer at Biz Technologies IT Solutions Ltd, Mar 2023 - Dec 2024 · 1 yr 10 mos, • Architected full backend for a Web3 marketplace supporting NFT trading, virtual land ownership, and digital asset transactions with smart contract integration on the blockchain. • Developed decentralized REST APIs for scalable asset discovery, transaction processing, and ownership verification, inspired by patterns from large-scale virtual ecosystems like Decentraland. • Integrated IPFS with MongoDB for a hybrid storage layer – IPFS for immutable asset data, MongoDB for structured metadata – and optimized queries to reduce API response time by 10–15%. • Led end-to-end backend ownership of asset lifecycle including minting, transfers, rental logic, and marketplace transactions with full blockchain and database consistency.

Node.js Developer at Red Roots India, Apr 2022 - Mar 2023 · 1 yr, Mumbai, Developed and implemented a robust API for a bag shopping ERP, utilizing cutting-edge technologies such as Node.js, Express.js, PostgreSQL, and Apollo Client. With Apollo Client reduce the 25% DB cost. Collaborated with a team of developers to ensure seamless integration of the backend system, resulting in efficient and user-friendly functionality. Demonstrated passion for backend development by actively researching and implementing best practices, utilizing tools like Mocha for thorough testing, and ensuring high-quality code. Contributed to the enhancement of the overall user experience by optimizing API performance increase 20% faster and implementing secure data handling techniques.

Javascript Developer at Red Roots India Pvt. Ltd, Apr 2022 - Mar 2023 · 1 yr, • Built and maintained scalable ERP backend systems using Node.js and PostgreSQL covering HR, sales, inventory, and vendor operations for a mid-sized enterprise client. • Developed an automated expense management module with multi-level approval workflows, reducing HR processing workload by 20% and improving finance team visibility. • Improved overall API performance by 20% through targeted query optimization, strategic indexing, and response caching, resulting in faster page loads and better UX. • Implemented role-based access control (RBAC) and secure JWT-based authentication, ensuring fine-grained authorization across all ERP modules and protecting sensitive employee data.

Backend Development Trainee @FunctionUp || JavaScript || Node.js at FunctionUp, Nov 2021 - Mar 2022 · 5 mos, Developed and implemented a robust and scalable backend API for a shopping portal, similar to Flipkart, utilizing cutting-edge technologies such as Node.js, Express.js, and JavaScript. Leveraged MongoDB to efficiently manage and store data, ensuring seamless user experiences and smooth data retrieval. Employed bcrypt encryption for enhanced security and protection of sensitive user information. Demonstrated passion for full-stack development by successfully delivering a high-quality and user-friendly platform.

Education

Bachelor of Technology - BTech, Computer Science, Dr. A.P.J. Abdul Kalam Technical University

Intermediate, Mathematics, Sakaldiha Inter Collage Sakaldiha