Tools & Technologies.
A curated technical stack designed for workflow automation, custom systems development, and high-performance cloud hosting.
Zoho Ecosystem
Frontend
Backend & Integration
Deployment
Featured Production Systems.
Production dashboards, industrial portals & e-commerce platforms engineered for clients worldwide.
Scalable web development & business automation.
From modern full-stack web applications and Zoho Commerce stores to enterprise REST APIs, workflow automation, and rapid production bug fixing.
Custom Web & SaaS Platforms
Building high-performance web apps, scalable SaaS products, and secure client admin portals.
API & Third-Party Integration
Connecting payment gateways, external ERP systems, and cloud databases for automated data sync.
Zoho Commerce & E-Commerce
Engineering custom storefronts, payment integrations, and frictionless automated checkout flows.
Deluge Scripting & Automation
Automating complex business workflows and eliminating manual tasks with tailored Deluge logic.
Production Bug Fixes & Support
Rapid diagnosis and hotfixes for broken Deluge scripts, failing webhooks, and critical errors.
Performance & Technical SEO
Engineering ultra-fast web platforms optimized for 95+ PageSpeed scores and Core Web Vitals.
How We Build Together.
A structured, transparent roadmap from discovery to launch and scaling.
- Step 01Phase 1/6
Discovery Call
A 20–30 minute call to understand your products, buyers, and export markets.
- Step 02Phase 2/6
Market & Competitor Audit
We review what your competitors are doing online and where the gaps are.
- Step 03Phase 3/6
Scope & Fixed Quote
A written scope with page list, features, timeline, and a fixed price — no surprises.
- Step 04Phase 4/6
Design & Build
Wireframe, design approval, then development in Next.js with weekly previews.
- Step 05Phase 5/6
Launch & Handover
Domain, hosting, SSL, analytics, Search Console, and a walkthrough for your team.
- Step 06Phase 6/6
Growth Support
Optional ongoing SEO, content, and feature development as your business scales.
Freelance Full-Stack & Zoho Developer for Hire.
Partnering directly with founders, growing businesses, and engineering teams across New York, Austin, London, and Dubai. Direct senior developer access—zero agency overhead.
Web Applications & Dashboards
Custom Next.js & React systems built for speed, scale, and operational clarity.
Node.js, PostgreSQL & APIs
Secure backend architectures, third-party webhook sync, and resilient REST APIs.
Zoho CRM, Creator & Deluge
Automated business pipelines, custom Deluge scripts, and multi-app data flow.
Emergency Bug Fixing
Rapid root-cause fixes for live server errors, broken checkouts, and UI glitches.
Technical SEO & Performance
Core Web Vitals, Schema.org entities, and sub-second page speed optimizations.
Redesign & Development
Upgrading clunky legacy portals into sleek, high-converting digital products.
Frequently Asked Questions
Sumer Kumar offers custom full-stack web application development, Next.js and React frontend engineering, Node.js and Express REST API development, PostgreSQL database architecture, Zoho CRM & Zoho Creator workflow automation, Deluge scripting, webhook integrations, B2B portals, and production bug fixing.
You can reach out directly through the contact section on this site, connect via WhatsApp (+91 8949470181), email fullstack@devsumer.online, or submit the contact form at /contact. After reviewing your requirements, we will schedule a discovery call, outline the technical scope, timeline, and delivery milestones.
Yes. Services are delivered remotely to clients, startups, and enterprises worldwide, with regular collaboration in priority markets including New York, San Francisco, Austin, Denver, Atlanta, and Dallas in the USA; London and Manchester in the UK; and Dubai and Abu Dhabi in the UAE.
Core technologies include Next.js, React.js, TypeScript, Tailwind CSS, Node.js, Express.js, PostgreSQL, REST APIs, Webhooks, Zoho CRM, Zoho Creator, Zoho Commerce, and Zoho Deluge scripting.
Yes. Sumer specializes in automating multi-step business workflows using Zoho CRM, Zoho Creator, custom Deluge scripts, webhooks, and REST APIs to sync data across third-party tools, streamline lead pipelines, and remove repetitive manual tasks.
Yes. Sumer Kumar is available worldwide for freelance, contract, and remote development engagements with flexible communication schedules aligned to US, UK, and UAE business hours.
Let's Work Together.
Ready to scale? Let's talk. Available for contract roles, full-stack Next.js web applications, and Zoho Deluge automations worldwide.