Full-Stack Product Engineer

Paresh Dahivelkar

I Build Scalable Product Systems That Drive Business Growth

Full-Stack Product Engineer with 3+ years delivering production-ready platforms across mobile, web, and backend. I architect and ship high-performance systems built for scale, reliability, and long-term product velocity.

Open to international product teams and remote-first engineering roles.

Delivered 25+ production apps and engineered 10+ backend systems focused on reliability, scale, and measurable outcomes.

Product ArchitectureScalable PlatformsSystem ReliabilityBusiness OutcomesReal-Time ProductsEnterprise DeliveryProduct ArchitectureScalable PlatformsSystem ReliabilityBusiness OutcomesReal-Time ProductsEnterprise Delivery

Experience

3+ years

Apps Delivered

25+

Backend Systems Built

10+

Enterprise Projects

8+

Outcome-Focused Highlights

Owns delivery from system architecture to production deployment.
Designs platforms that scale with users, teams, and feature growth.
Builds resilient backend foundations for real-time business operations.
Improves release confidence through stable, maintainable system design.
Aligns engineering decisions with product goals and revenue priorities.
Ships cross-platform ecosystems built for long-term performance.

About

Senior product engineer focused on enterprise-grade mobile and backend systems.

Paresh Dahivelkar portrait

I engineer end-to-end digital products that connect high-performance Flutter frontends with secure, scalable backend systems. My focus is on production reliability, clean architecture, and measurable business outcomes.

Across education, healthcare, and enterprise operations, I have delivered systems with role-based access control, real-time Firebase integrations, and modular REST APIs that scale across teams and locations.

Technical

Principles that shape every architecture decision and delivery strategy.

Product Thinking

Every system starts with outcomes, not features. I align engineering with measurable business impact.

Clean Architecture First

Modular, testable codebases with clear service boundaries and long-term maintainability.

Secure by Design

Role-based access, token validation, and strict data contracts baked into every layer.

Scalability from Day One

APIs, data models, and queues designed to scale across locations and teams.

Performance Obsessed

Latency budgets, caching, and realtime sync strategies to keep systems fast under load.

Enterprise Mindset

Audit trails, monitoring, and deployment pipelines built for production environments.

Impact Metrics

Quantified results from production systems, engineered for scale and reliability.

0+

Users Supported

0%

API Uptime Architecture

0+

Applications Delivered

0+

Backend Systems Designed

0+

Enterprise Deployments

System Architecture Capability

A simplified view of the enterprise systems I design and deploy.

Layer 1

Frontend Layer

Layer 2

API Layer

Layer 3

Auth & RBAC

Layer 4

Database Layer

Layer 5

Real-Time Sync

Layer 6

Monitoring & Logs

Layer 7

Deployment Pipeline

Projects

Mobile, web, and backend projects that demonstrate secure architecture, measurable impact, and operational scale.

Case Study

JMDI Academy

Reduced administrative workload by 40% and doubled parent response time with unified communication flows.

FFlutterFAFirebase AuthFFirestoreFFCMRAREST APIsPPHP

Problem Statement

The academy lacked a single secure platform for attendance, fee tracking, and parent-teacher collaboration across campuses.

Business Challenge

Consolidate fragmented workflows into a reliable, role-driven system without compromising real-time visibility or data integrity.

My Role & Responsibilities

Owned backend integration architecture, implemented role-based access with Firebase Auth custom claims, designed Firestore schemas, and enforced API validation across reporting services.

System Architecture Explanation

Flutter client paired with Firebase Auth + Firestore for real-time data, backed by PHP reporting services built on modular controllers.

Key Features

Attendance and performance dashboards
Parent-teacher communication and alerts
Fee reminders with payment status tracking
Role-based access for admins, teachers, and parents
Realtime updates via Firestore listeners

Security Implementation

Role-scoped Firebase security rules, JWT-secured REST endpoints, and server-side validation for attendance and payment mutations.

Scalability Design

Partitioned Firestore by class and campus, batched writes for attendance sync, and cached reporting endpoints.

Database Structure Overview

Firestore collections for students, classes, attendance, fees, and notifications with composite indexes for high-volume reads.

API Structure Overview

Versioned REST endpoints for reports, exports, and legacy integrations with strict schema validation.

User Roles & Permissions

AdminTeacherParent

Deployment Strategy

CI-driven releases with staged rollouts, Firebase Hosting for assets, and monitoring via Crashlytics.

Future Improvements

Multi-campus analytics dashboards and SSO integration for enterprise education networks.

Development Timeline

Discovery and UX mapping

Auth + data modeling

Realtime services + APIs

QA and rollout

Architecture Diagram

Auth + RBAC
Core APIs
Realtime Sync
Observability + Audit Logs

Case Study

Innovera School App

Improved student engagement by 30% through Moodle integration and real-time academic updates.

FFlutterMAMoodle APIRAREST APIsPPHPFFirebase

Problem Statement

School teams needed mobile access to Moodle content, attendance, and academic updates without fragmented systems.

Business Challenge

Integrate Moodle APIs into a stable mobile platform while enforcing secure multi-role access and consistent data sync.

My Role & Responsibilities

Led backend integration design, implemented secure Moodle API connectivity, and built role-based access control for teachers, parents, and students.

System Architecture Explanation

Flutter client with a Moodle API layer, PHP middleware for data transformation, and Firebase for authentication and notifications.

Key Features

Synced Moodle course access and content delivery
Attendance, timetable, and notices in one hub
Push notifications for deadlines and updates
Role-based flows for students, parents, and teachers

Security Implementation

Role-scoped API tokens, Moodle permission checks, and secure validation across middleware services.

Scalability Design

Cached Moodle responses and async sync jobs for large course assets to reduce latency.

Database Structure Overview

Hybrid storage using Moodle DB for course content and Firestore for mobile-specific workflows.

API Structure Overview

REST endpoints for schedules, attendance, and analytics with consistent response schemas.

User Roles & Permissions

AdminTeacherStudentParent

Deployment Strategy

CI builds with staged rollouts, monitored via Crashlytics and Firebase analytics.

Future Improvements

Offline-first lesson caching and AI-driven learning recommendations.

Development Timeline

Moodle integration planning

Role-based UX flows

Realtime updates

Performance tuning

Architecture Diagram

Auth + RBAC
Core APIs
Realtime Sync
Observability + Audit Logs

Case Study

Edurashi

Delivered 25% faster content publishing with a scalable backend API for learning teams.

FFlutterNNode.jsRAREST APIsFFirebasePPHP

Problem Statement

Content teams required a fast, resilient platform for publishing learning updates and tracking progress.

Business Challenge

Design a stable API layer capable of handling burst traffic while keeping client sync reliable.

My Role & Responsibilities

Built backend integration flows, designed scalable REST endpoints, and implemented Firebase-backed real-time sync for content updates.

System Architecture Explanation

Flutter client with Node.js services for content APIs, Firebase for realtime updates, and PHP modules for reporting.

Key Features

Personalized learning paths
Realtime content updates
Progress tracking and analytics
Admin upload workflows

Security Implementation

JWT authentication, role-based content permissions, and validated upload pipelines.

Scalability Design

Node.js services scaled horizontally with modular routing, caching, and rate limits.

Database Structure Overview

Firestore for learning data with SQL for reporting exports and audit history.

API Structure Overview

REST endpoints for content, progress, and reporting with consistent schemas.

User Roles & Permissions

AdminContent ManagerLearner

Deployment Strategy

Containerized services with blue-green deployment for zero-downtime releases.

Future Improvements

Search indexing and personalized recommendation engines.

Development Timeline

API design

Realtime sync

Admin tooling

Scale testing

Architecture Diagram

Auth + RBAC
Core APIs
Realtime Sync
Observability + Audit Logs

Case Study

HMS Hospital System

Reduced appointment scheduling time by 35% while improving staff coordination.

FFlutterPPHPMMySQLRAREST APIs

Problem Statement

Hospital operations lacked a secure, mobile-first system for appointments, patient updates, and staff coordination.

Business Challenge

Build a role-based backend that supports sensitive healthcare workflows with consistent security and uptime.

My Role & Responsibilities

Architected backend integration patterns, enforced role-based access control, and maintained API stability for critical workflows.

System Architecture Explanation

Flutter client with PHP REST APIs using modular controllers and MySQL for transactional healthcare data.

Key Features

Doctor availability and appointment booking
Patient records and secure messaging
Admin dashboard for staff coordination
Notification workflows for appointments

Security Implementation

JWT-based authentication, server-side validation, and encrypted data handling for sensitive records.

Scalability Design

Optimized SQL indexes, cached appointment availability, and modular API services.

Database Structure Overview

MySQL with normalized tables for patients, doctors, appointments, and billing.

API Structure Overview

REST endpoints for booking, patient updates, and reporting with standardized schemas.

User Roles & Permissions

AdminDoctorPatientStaff

Deployment Strategy

Cloud-hosted services with automated backups, monitoring, and uptime alerts.

Future Improvements

Telemedicine modules and analytics dashboards for hospital management.

Development Timeline

Workflow mapping

API implementation

Security hardening

Launch

Architecture Diagram

Auth + RBAC
Core APIs
Realtime Sync
Observability + Audit Logs

Backend Case Study

FreshWays - Smart Retail Management System

Enterprise retail backend unifying authentication, inventory control, and real-time order visibility across multi-site operations.

Node.jsExpress.jsFirebaseREST APIs

Problem Statement

Retail teams needed a single secure backend to manage inventory, orders, staff access, and live updates across locations.

Solution Architecture

Modular MVC backend with Firebase Auth, Firestore data model, and JWT-secured REST APIs governing inventory and order workflows.

Features

  • Role-based access for Admin, Staff, Manager
  • Inventory management APIs with audit history
  • Order tracking and real-time updates
  • Secure JWT authentication and refresh flows
  • Scalable MVC structure for future services
15,000+ users supported99.9% API uptime architectureScalable for multi-location deployment

Project Flow Timeline

User authenticates via Firebase Auth

JWT issued for API access and role scoping

Inventory + order services served via REST APIs

Realtime updates streamed from Firestore listeners

User Roles

AdminStaffManager

Backend Case Study

West Bengal Ropeway Booking System

Production booking backend powering online reservations, staff verification workflows, and real-time ticket validation.

Node.jsExpress.jsFirebase

Problem Statement

The ropeway authority required a unified booking backend supporting online reservations, staff operations, and gate validation.

Solution Architecture

Centralized booking service with Firebase Auth, role-based panels, and QR validation endpoints for gatekeeper verification.

Features

  • Online ticket booking with real-time capacity checks
  • Admin dashboard for booking management
  • Gatekeeper verification panel with QR validation
  • Live booking status updates and staff alerts
  • Employee login with access controls
15,000+ users supported99.9% API uptime architectureProduction-ready backend structure

Project Flow Timeline

User books ticket and receives QR token

Booking staff validates reservation details

Gatekeeper scans QR to verify entry

Status updates synced to admin dashboard

User Roles

AdminBooking StaffGatekeeper

Backend Case Study

E-Offices - Employee & Staff Management System

ERP-style backend system for employee, attendance, and document workflows across departments.

Node.jsExpress.jsFirebaseREST APIs

Problem Statement

Office teams lacked a centralized backend to manage attendance, permissions, documents, and internal notifications.

Solution Architecture

API-first services for attendance, documents, and notifications using Firebase Auth and Firestore scaling patterns.

Features

  • Attendance management APIs with reporting
  • Staff login with role permissions
  • Document upload and lifecycle management
  • Notification system powered by Firebase
  • Scalable backend modules ready for ERP expansion
15,000+ users supportedScalable for multi-location deploymentProduction-ready backend structure

Project Flow Timeline

Employees authenticate and receive role permissions

Attendance records logged via API

Documents uploaded with access policies

Notifications triggered for approvals

User Roles

AdminHRDepartment LeadEmployee

Why Teams Trust My Engineering

Enterprise teams rely on systems that are secure, scalable, and built for long-term growth.

Production-Ready Code

Battle-tested architecture, observability, and resilience for real-world environments.

Clean Modular Architecture

MVC and modular services that keep teams fast, aligned, and scalable.

Security & Role-Based Systems

JWT, Firebase Auth, and role-based authorization built into every workflow.

Long-Term Scalable Design

Backend systems engineered for multi-tenant growth and enterprise adoption.

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Open to international roles and enterprise product collaborations.

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