Vivek Kumarbuilds systems& businesses.
Senior software engineer with 5+ years in Java & Spring Boot — and a product builder who researches markets, identifies real pain points, and ships SaaS products that grow into businesses.
Based in India 🇮🇳
Engineer meets Entrepreneur.
I architect systems that scale.
From REST API design to database normalization, I build backend infrastructure that's clean, performant, and maintainable — with Java & Spring Boot as my core, PostgreSQL as my foundation.
I identify markets before they peak.
Beyond code, I research customer pain points, validate business models, and build products from concept to paying users — targeting SaaS, fintech, govtech, and India's underserved segments.
Six domains I'm obsessed with.
B2B SaaS Products
Building subscription-based tools for small businesses, freelancers, and SMEs — with a focus on fast onboarding, clear value, and retention-first design.
Compliance Automation
Turning tedious regulatory and compliance workflows into automated, error-free software — especially in India's complex GST, labour, and filing landscape.
AI-Enabled Software
Embedding LLMs and intelligent automation into real business workflows — not AI for AI's sake, but products where intelligence is the moat.
Fintech & Payments
Accounting tools, invoicing, expense management, and financial workflows for India's 63M+ small businesses who are still running on WhatsApp and Excel.
Government Tech
Bridging the gap between citizens, small businesses, and India's complex government processes — creating clarity, speed, and access for the underserved.
Freelancers & Job Seekers
Products for independent professionals navigating India's gig economy — from portfolio tools and contracts to job prep platforms with real traction metrics.
Things I've built & shipped.
Enterprise Invoice & GST Platform
Full-stack billing and compliance system for SMEs — automated GST calculations, e-invoice generation, multi-branch support, and role-based access.
Multi-tenant SaaS API Gateway
Scalable REST API backend with tenant isolation, subscription tier enforcement, rate limiting, and audit logging for a B2B product platform.
Compliance Workflow Automation Tool
MVP for automating repetitive compliance tasks — deadline tracking, document checklists, status dashboards — for CA firms and their SME clients.
AI-Powered Job Prep Platform (Concept)
Research-validated SaaS for Indian job seekers — personalized interview prep, resume analysis, and mock tests using LLM-backed assessment engine.
Freelancer Contract & Payment Manager
Lightweight tool for Indian freelancers to manage contracts, raise invoices with TDS handling, track payment status, and send automated reminders.
Code is the vehicle.
Value is the destination.
I don't build features — I solve problems people are actively willing to pay to escape. Every line of code I write is in service of a user who shouldn't have to deal with the complexity I'm absorbing for them.
My edge is sitting at the intersection: I can spot a market opportunity AND build the product myself, without waiting for permission or co-founders.
Validate before building
Research real pain, find paying signals, then write the first line of code. Never the reverse.
Ship fast, learn faster
An MVP in 6 weeks beats a perfect product in 6 months. Users teach you what matters.
Build for scale from day one
Architecture decisions made at 100 users haunt you at 100,000. Design with that in mind.
India is the opportunity
63M SMEs, 500M+ workers, complex compliance — enormous problems, massive under-served markets.
The stack behind the work.
Let's build something that matters.
Whether you're looking for a senior backend engineer, want to collaborate on a product idea, or just want to talk about India's B2B SaaS opportunity — I'm genuinely interested.
Open to conversations about:
I'm selective about what I take on — and deeply committed when I do. Here's what genuinely excites me right now.