What services does Full-Stack & Zoho Developer Sumer Kumar (Developer Sumer) offer?

Developer Sumer (Sumer Kumar) offers custom Next.js web application development, Node.js REST API engineering, PostgreSQL database design, Zoho CRM/Creator workflow automation, and custom API webhook integrations.

How can I contact Developer Sumer to hire for a project?

You can reach out via the contact form on devsumer.online/contact, email fullstack@devsumer.online, or call directly at +91 8949470181.

What tech stack do you use for web development?

I primarily use Next.js, React, Node.js, and PostgreSQL for robust, SEO-friendly, and highly scalable applications.

Can you automate my business workflows?

Yes, I specialize in Zoho CRM customizations, Deluge scripting, and connecting disjointed tools using robust APIs to eliminate manual work.

Do you offer SEO services?

All my web applications are built with technical SEO and Core Web Vitals in mind to ensure high search engine rankings from day one.

Available for Projects3+ Years Experience

I build scalable web applications & automated workflows.

Full-Stack Software Engineer & Zoho Specialist with 3+ years of experience crafting custom Next.js web applications, REST API integrations, enterprise Zoho CRM Deluge automation, and production bug fixing.

Web ApplicationsFrontend DevelopmentBackend & REST APIsAPI IntegrationsZoho EcosystemWorkflow AutomationBug Fixing & Optimization

Sumer Kumar

Full-Stack & Zoho Engineer

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SOLUTIONS THAT DRIVE GROWTH

Scalable web development & business automation solutions.

From modern full-stack web applications and Zoho Commerce stores to enterprise REST API integrations, workflow automation, and rapid production bug fixing — engineered for speed, reliability, and scale.

Custom Web & Software Development

Building scalable web applications, client portals, admin dashboards, and SaaS platforms using modern stacks.

Next.js / ReactNode.js APIsVue.js / AngularPostgreSQL DBPHP BackendSaaS Solutions

API & Third-Party Integration

Connecting software tools, payment gateways, ERP systems, and cloud databases for real-time sync.

REST APIsPayment GatewayERP SystemsWebhooks SyncDatabase SyncOAuth 2.0

Zoho Commerce & Online Stores

Building custom e-commerce storefronts, payment gateways, product catalogs, and automated order pipelines.

Zoho CommerceOnline StoresProduct CatalogsOrder FlowsPayment SyncCart Checkout

Deluge Scripting & Automation

Automating complex business workflows and saving 100+ hours monthly with custom Deluge scripts and webhooks.

Deluge ScriptZoho Webhooksn8n WorkflowsOrder AutomationEmail ScriptsApproval Flow

Production Bug Fix & Support

Rapid diagnosis and resolution of broken Deluge scripts, failing API webhooks, and critical system errors.

Deluge FixesAPI DebuggingSpeed TuningDatabase FixCode RefactorBug Fixing

SEO, AEO & Speed Optimization

Engineering fast web platforms optimized for Google rankings, 95+ PageSpeed scores, and AI search engines.

Web VitalsPageSpeed 95+Technical SEOAEO SchemaGEO EngineNext.js Speed

FEATURED CASE STUDIES

Real-world software engineering & business case studies.

Explore selected case studies demonstrating custom web applications, REST API integrations, and workflow automations — engineered for measurable business impact.