Vinay Kumar — System Architect, Full-Stack Software Developer & Founder of OpsX
Vinay Kumar (@thisvinaykumar) is a System Architect and Senior Full-Stack Software Developer in India with 5+ years of production experience, and the founder of Opsx Apex Private Limited. He designed and built the OpsX enterprise ERP end to end — offline-first attendance, payroll with PF and ESI, a double-entry ledger and the Android apps — and leads every software, IT and marketing engagement OpsX takes on.
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Who he is
A full-stack engineer who has shipped multi-tenant SaaS for a B2B and B2C travel marketplace (20+ Node.js microservices, high-volume supplier and payment API integrations) and who, since January 2026, has been building OpsX from Gaya, Bihar: 760+ commits, designed and built solo, running in production for Indian plants and SMEs.
Alongside the ERP he writes as JavaScript With Vinay on Medium, produces the Author Vinay and Magadh Ka Munshi channels, and founded the Shubhsaathi Foundation, a Section 8 non-profit.
Technical architecture expertise
- Node.js & NestJS microservicesService boundaries, queues and workers, idempotent APIs and money-safe flows: claim, debit once, poll, settle.
- Multi-tenant SaaS architectureTenant routing, shared or dedicated database per tenant, plan-based entitlements, RBAC and audit trails.
- Enterprise ERP designAttendance, rosters, payroll with PF and ESI deductions, approvals and a double-entry general ledger in PostgreSQL.
- Data: MongoDB, PostgreSQL, RedisSchema design, aggregation pipelines, version-stamped caches, transactions and idempotency keys.
- Docker, Nginx, AWSContainerised services, Nginx reverse proxies with security headers and CSP, TLS, backups and rollback-first deploys.
- Offline-first mobileAndroid apps with a local SQLite queue and store-and-forward sync, so a plant with no signal still records every punch.
- Front-end: Angular, React, TypeScriptBilingual (English and Hindi) enterprise portals with build-time translation parity checks.
- CI/CD and qualityGitHub Actions pipelines, Jest test suites (700+ spec files in OpsX), golden-master and contract tests.
Project showcase
- OpsX ERP (opsx.in)Attendance, payroll, field staff and kiosk software for Indian plants and SMEs, offline-first and bilingual. Attendance · Payroll
- OpsX Partner & OpsX KioskThe field staff app and the gate attendance kiosk, both Android, both working without a network. Download
- OpsX multi-tenant platformTenant provisioning, entitlements, billing and a control centre, running in production. Architecture & docs
- Shubhsaathi Foundation websiteWebsite for the Section 8 non-profit he founded, available in 14 Indian languages.
- Content automationPipelines that write, voice, render and publish video and social content for his channels, and cross-post the OpsX blog.
- Technical SEO for opsx.inThe site you are reading: static pages, structured data, Core Web Vitals and Search Console, built in-house. SEO services
Profiles
Find Vinay Kumar (@thisvinaykumar) on: Portfolio · LinkedIn · GitHub · X (Twitter) · Instagram · Facebook · Medium · YouTube (Author Vinay) · Instagram (Author Vinay) · YouTube (Magadh Ka Munshi) · Instagram (Magadh Ka Munshi)
Work with Vinay and OpsX
Need an ERP, custom software, IT support or technical SEO? See the services, or WhatsApp or call +91 79039 27019.
Questions
Who is Vinay Kumar (thisvinaykumar)?
Vinay Kumar is a System Architect and Senior Full-Stack Software Developer in India, and the founder of Opsx Apex Private Limited (OpsX). His handle on every platform is thisvinaykumar; his website is vinay.opsx.in.
What does Vinay Kumar specialise in?
Multi-tenant SaaS and Enterprise ERP architecture with Node.js, NestJS, Angular, TypeScript, MongoDB, PostgreSQL, Redis, Docker and AWS, including offline-first Android apps and payroll with PF and ESI.
Is Vinay Kumar available for projects?
Yes, through OpsX: custom software and website development, managed IT support and digital marketing, as well as the OpsX ERP itself.