I’m a Full Stack Software Engineer with 2+ years of experience building scalable web and SaaS applications using TypeScript and modern JavaScript frameworks like React and Next.js, along with backend platforms such as Node.js, Express, and NestJS. I enjoy designing reliable REST APIs, implementing secure authentication and RBAC for multi-tenant systems, and optimizing PostgreSQL performance to keep services fast and dependable. I’ve worked across production HRMS and multi-client platforms, contributing to everything from frontend performance improvements and mobile experiences (React Native) to Dockerized deployments and CI/CD automation with GitHub Actions. I’m focused on clean architecture, OWASP-aligned security practices, and practical engineering—so features ship smoothly, stay maintainable, and support growth for real users.

Shantanu Paul

I’m a Full Stack Software Engineer with 2+ years of experience building scalable web and SaaS applications using TypeScript and modern JavaScript frameworks like React and Next.js, along with backend platforms such as Node.js, Express, and NestJS. I enjoy designing reliable REST APIs, implementing secure authentication and RBAC for multi-tenant systems, and optimizing PostgreSQL performance to keep services fast and dependable. I’ve worked across production HRMS and multi-client platforms, contributing to everything from frontend performance improvements and mobile experiences (React Native) to Dockerized deployments and CI/CD automation with GitHub Actions. I’m focused on clean architecture, OWASP-aligned security practices, and practical engineering—so features ship smoothly, stay maintainable, and support growth for real users.

Available to hire

I’m a Full Stack Software Engineer with 2+ years of experience building scalable web and SaaS applications using TypeScript and modern JavaScript frameworks like React and Next.js, along with backend platforms such as Node.js, Express, and NestJS. I enjoy designing reliable REST APIs, implementing secure authentication and RBAC for multi-tenant systems, and optimizing PostgreSQL performance to keep services fast and dependable.

I’ve worked across production HRMS and multi-client platforms, contributing to everything from frontend performance improvements and mobile experiences (React Native) to Dockerized deployments and CI/CD automation with GitHub Actions. I’m focused on clean architecture, OWASP-aligned security practices, and practical engineering—so features ship smoothly, stay maintainable, and support growth for real users.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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Language

English
Fluent
Hindi
Fluent
Bengali
Fluent

Work Experience

Software Engineer at E2X Infotech
October 1, 2025 - Present
Architected and deployed scalable RESTful APIs with NestJS, Node.js, and Express, supporting 1,000+ concurrent users with optimized PostgreSQL queries, connection pooling, and indexed schemas for 99.9% API uptime. Implemented JWT authentication and RBAC authorization for multi-tenant organizational hierarchies using OWASP-aligned security practices. Built and optimized frontend interfaces using Next.js (App Router) and Tailwind CSS to reduce page load time by 35%. Led full-stack development of a production HRMS SaaS platform (payroll, attendance, leave), containerized with Docker and automated via GitHub Actions CI/CD, serving 10+ client organizations. Configured Nginx reverse proxy and participated in Agile/Scrum with code reviews and API documentation.
Software Engineer at Aieze
July 1, 2024 - September 30, 2025
Designed and built RESTful APIs with Node.js and Express, implementing pagination, filtering, and query optimization to reduce average API response time by 25%. Developed reusable frontend components with Next.js and Tailwind CSS, implementing JWT-secured authentication with refresh token rotation aligned with OAuth 2.0 best practices. Optimized MongoDB schemas with compound indexes and restructured aggregation pipelines, improving p95 query latency by 60% for high-traffic endpoints. Integrated the OpenAI API for AI-powered features and managed environment-based configuration across development, staging, and production environments.

Education

B.Sc. (Science) at SKMU Dumka, Jharkhand
January 1, 2017 - January 1, 2020

Qualifications

Full Stack Development
January 1, 2023 - September 1, 2026
The Complete Full Stack Web Development
January 1, 2023 - September 1, 2026
React and Redux Certification
January 1, 2022 - September 1, 2026

Industry Experience

Software & Internet, Government, Travel & Hospitality, Healthcare, Professional Services
    Favotrip — Travel Deals & Experience Platform (favotrip.nl)

    Favotrip is a modern Dutch travel platform built to offer curated, high-value travel packages and experience bundles (combining hotel stays, theme park tickets, local activities, and tours) across Europe.

    Key Features & Architecture:

    Flexible Booking & Voucher System: Built a dual-channel flow allowing users to either book travel dates directly or purchase 12-month flexible gift vouchers backed by dynamic voucher guarantees.

    Curated Travel Bundles: Developed algorithmically paired hotel + activity packages (e.g., Disneyland Paris packages, city trips, wine tours, wellness stays).

    Partner & Channel Integration: Structured custom checkout and redemption flows for major partner campaigns (including ING bank vouchers and local tour operators).

    Localized User Experience: Designed a responsive, mobile-first e-commerce interface supporting iDEAL, Bancontact, PayPal, and credit card payments.

    HR Space Application

    Managing HR, tracking tasks, and handling payroll shouldn’t require five different apps. HR Space brings everything your team needs into a single secure platform.

    Key Features:

    Smart Attendance Tracking: Clock in/out with location-verified shift management, automated punctuality checks, and seamless correction workflows.

    On-the-Go Leave Management: Request, review, and track Sick, Casual, Planned, and Half-Day leaves in real-time with instant notifications.

    Streamlined Payroll & Docs: Access monthly payslips, securely store employment documents, and request OTP-verified NOC or experience letters anytime.

    Task & Work Logs: Log daily updates, assign multi-level tasks with time tracking, and review performance feedback in real time.

    Role-Based Admin Tools: Granular access controls, organization-wide analytics, holiday configuration, and intern program management.

    Built exclusively for E2X Infotech employees and managers.

    E2X Infotech | Full-Stack Developer / Software Engineer

    E2X Infotech is an ISO 27001-certified global IT services and software development company specializing in custom web applications, enterprise solutions, e-commerce platforms, and high-performance mobile apps.

    Core Engineering & Delivery: Architected and developed scalable web and mobile solutions using modern tech stacks (React.js, Next.js, Node.js, Nest.js, PHP/Laravel, and Cloud infrastructure like AWS & Azure).

    Internal Products: Built internal enterprise apps like HR Space to streamline company-wide operations, attendance management, leave tracking, and workflow automation.

    Client Success: Delivered robust digital products and software solutions for startups, SMEs, and global enterprises across industries including IT, e-commerce, and hospitality (such as hotel channel manager systems).

    Ozeart (ozeart.com) — Fine Art & Home Decor Marketplace

    Ozeart (ozeart.com) is an online art marketplace designed to make original art, hand-painted decor, and stoneware sculptures accessible to collectors and interior design enthusiasts worldwide.

    Key Contributions:

    Platform Development: Built an end-to-end e-commerce platform featuring original paintings, stoneware sculptures, and handcrafted decor items.

    Artist Verification & Portal: Created an artist workflow for profile registration, artwork approval, pricing management, and digital identity verification.

    Secure Payments & Global Reach: Enabled payment processing, multi-currency display, and automated order updates across international and domestic shipping routes.

    UX & Performance: Optimized front-end performance, search/category filtering, and mobile responsiveness for smooth browsing across all devices.

    SAHR / HR Space — Enterprise HRMS Platform (sahr.e2xhub.cloud)

    SAHR (HR Space) is the official web portal and enterprise human resource management system (HRMS) for E2X Infotech, hosted securely on cloud infrastructure (sahr.e2xhub.cloud). It unifies core HR operations, workforce tracking, and employee self-service into a single platform.

    Key Contributions & Product Features:

    Attendance & Shift Verification: Engineered location-verified clock-in/out mechanisms with automated shift compliance and correction request approval flows.

    Leave & Work Schedule Management: Built real-time workflows for multi-type leave applications (Casual, Sick, Planned, Maternity) with granular manager approval hierarchies.

    Payroll & Document Governance: Built secure access modules for downloading monthly salary slips and issuing OTP-verified official HR documents/letters.

    Task & Productivity Tracking: Integrated daily work log reporting, task lifecycle management, time-tracking against estimates, and performance feedback systems.

    Cloud Deployment & RBAC: Managed deployment on cloud infrastructure with role-based access control (RBAC) across employees, managers, and admin roles.

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