Open to Work

Niraj Kumar

Senior Full Stack Engineer

Senior Full Stack Engineer with 6+ years of experience architecting, developing, and delivering scalable SaaS platforms, enterprise applications, AI-powered solutions, and B2B/B2C marketplaces. Strong expertise in React.js, Next.js, Node.js, TypeScript, PostgreSQL, AWS, Docker, OpenAI, Claude AI, Stripe, and multi-tenant SaaS systems.

[email protected]India · Open to Remote Opportunities

Resume Snapshot

6+

Years

6

Roles

Download Resume

Work Experience

Senior Software Developer

Skilligent Technologies

Jun 2025 - Jun 2026 - Remote - Full-time

Architecting and developing scalable SaaS platforms, enterprise applications, and marketplaces. Designing multi-tenant architectures, compliance workflows, inventory management, and analytics. Leading feature delivery, code reviews, and engineering best practices.

Next.jsNode.jsTypeScriptPostgreSQLPrismaAWSDockerGitHub ActionsCI/CDMulti-Tenant

Full Stack Developer

Bhavishya Logic Nest

Sep 2024 - May 2025 - Full-time

Developed logistics and operations platforms with dashboards, reporting, and analytics. Built REST APIs and backend services using Node.js and PostgreSQL. Implemented data visualization with Chart.js and ApexCharts.

React.jsNode.jsPostgreSQLREST APIsChart.jsApexChartsJavaScript

Full Stack Developer

Essence Software Solutions

Feb 2024 - Aug 2024 - Full-time

Developed AI-powered chatbot SaaS solutions using OpenAI APIs and RAG workflows. Implemented Stripe subscriptions, recurring billing, invoicing, and webhook automation. Built multi-tenant chatbot solutions with usage-based plans.

OpenAI APIRAGStripeNext.jsReact.jsTypeScriptTailwind CSSMulti-TenantWebhook

Software Developer

Turtl Cyber Security

Dec 2022 - Jan 2024 - Full-time

Developed secure communication platforms using React.js, Node.js, WebRTC, and Socket.IO. Implemented JWT, OAuth2, and RBAC-based security systems. Built scalable real-time communication services.

React.jsNode.jsWebRTCSocket.IOJWTOAuth2RBACTypeScript

Software Development Mentor / Teaching Assistant

Masai School

Jan 2022 - Nov 2022 - Full-time

Mentored students in JavaScript, React.js, Node.js, and software development fundamentals. Conducted code reviews, debugging sessions, and project guidance.

JavaScriptReact.jsNode.jsMentoringCode Reviews

Software Developer

Core Travel Management

Feb 2020 - Dec 2021 - Full-time

Developed business applications, dashboards, and REST APIs. Designed backend services and integrated third-party systems to optimize business operations.

MongoDBExpress.jsReact.jsNode.jsREST APIsJavaScript