Full-Stack Product Engineer
Paresh Dahivelkar
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.
Experience
3+ years
Apps Delivered
25+
Backend Systems Built
10+
Enterprise Projects
8+
Senior product engineer focused on enterprise-grade mobile and backend systems.
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.
Principles that shape every architecture decision and delivery strategy.
Every system starts with outcomes, not features. I align engineering with measurable business impact.
Modular, testable codebases with clear service boundaries and long-term maintainability.
Role-based access, token validation, and strict data contracts baked into every layer.
APIs, data models, and queues designed to scale across locations and teams.
Latency budgets, caching, and realtime sync strategies to keep systems fast under load.
Audit trails, monitoring, and deployment pipelines built for production environments.
Quantified results from production systems, engineered for scale and reliability.
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Users Supported
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API Uptime Architecture
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Applications Delivered
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Backend Systems Designed
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Enterprise Deployments
A simplified view of the enterprise systems I design and deploy.
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Mobile, web, and backend projects that demonstrate secure architecture, measurable impact, and operational scale.
Case Study
Reduced administrative workload by 40% and doubled parent response time with unified communication flows.
The academy lacked a single secure platform for attendance, fee tracking, and parent-teacher collaboration across campuses.
Consolidate fragmented workflows into a reliable, role-driven system without compromising real-time visibility or data integrity.
Owned backend integration architecture, implemented role-based access with Firebase Auth custom claims, designed Firestore schemas, and enforced API validation across reporting services.
Flutter client paired with Firebase Auth + Firestore for real-time data, backed by PHP reporting services built on modular controllers.
Role-scoped Firebase security rules, JWT-secured REST endpoints, and server-side validation for attendance and payment mutations.
Partitioned Firestore by class and campus, batched writes for attendance sync, and cached reporting endpoints.
Firestore collections for students, classes, attendance, fees, and notifications with composite indexes for high-volume reads.
Versioned REST endpoints for reports, exports, and legacy integrations with strict schema validation.
CI-driven releases with staged rollouts, Firebase Hosting for assets, and monitoring via Crashlytics.
Multi-campus analytics dashboards and SSO integration for enterprise education networks.
Discovery and UX mapping
Auth + data modeling
Realtime services + APIs
QA and rollout
Case Study
Improved student engagement by 30% through Moodle integration and real-time academic updates.
School teams needed mobile access to Moodle content, attendance, and academic updates without fragmented systems.
Integrate Moodle APIs into a stable mobile platform while enforcing secure multi-role access and consistent data sync.
Led backend integration design, implemented secure Moodle API connectivity, and built role-based access control for teachers, parents, and students.
Flutter client with a Moodle API layer, PHP middleware for data transformation, and Firebase for authentication and notifications.
Role-scoped API tokens, Moodle permission checks, and secure validation across middleware services.
Cached Moodle responses and async sync jobs for large course assets to reduce latency.
Hybrid storage using Moodle DB for course content and Firestore for mobile-specific workflows.
REST endpoints for schedules, attendance, and analytics with consistent response schemas.
CI builds with staged rollouts, monitored via Crashlytics and Firebase analytics.
Offline-first lesson caching and AI-driven learning recommendations.
Moodle integration planning
Role-based UX flows
Realtime updates
Performance tuning
Case Study
Delivered 25% faster content publishing with a scalable backend API for learning teams.
Content teams required a fast, resilient platform for publishing learning updates and tracking progress.
Design a stable API layer capable of handling burst traffic while keeping client sync reliable.
Built backend integration flows, designed scalable REST endpoints, and implemented Firebase-backed real-time sync for content updates.
Flutter client with Node.js services for content APIs, Firebase for realtime updates, and PHP modules for reporting.
JWT authentication, role-based content permissions, and validated upload pipelines.
Node.js services scaled horizontally with modular routing, caching, and rate limits.
Firestore for learning data with SQL for reporting exports and audit history.
REST endpoints for content, progress, and reporting with consistent schemas.
Containerized services with blue-green deployment for zero-downtime releases.
Search indexing and personalized recommendation engines.
API design
Realtime sync
Admin tooling
Scale testing
Case Study
Reduced appointment scheduling time by 35% while improving staff coordination.
Hospital operations lacked a secure, mobile-first system for appointments, patient updates, and staff coordination.
Build a role-based backend that supports sensitive healthcare workflows with consistent security and uptime.
Architected backend integration patterns, enforced role-based access control, and maintained API stability for critical workflows.
Flutter client with PHP REST APIs using modular controllers and MySQL for transactional healthcare data.
JWT-based authentication, server-side validation, and encrypted data handling for sensitive records.
Optimized SQL indexes, cached appointment availability, and modular API services.
MySQL with normalized tables for patients, doctors, appointments, and billing.
REST endpoints for booking, patient updates, and reporting with standardized schemas.
Cloud-hosted services with automated backups, monitoring, and uptime alerts.
Telemedicine modules and analytics dashboards for hospital management.
Workflow mapping
API implementation
Security hardening
Launch
Backend Case Study
Enterprise retail backend unifying authentication, inventory control, and real-time order visibility across multi-site operations.
Retail teams needed a single secure backend to manage inventory, orders, staff access, and live updates across locations.
Modular MVC backend with Firebase Auth, Firestore data model, and JWT-secured REST APIs governing inventory and order workflows.
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
Backend Case Study
Production booking backend powering online reservations, staff verification workflows, and real-time ticket validation.
The ropeway authority required a unified booking backend supporting online reservations, staff operations, and gate validation.
Centralized booking service with Firebase Auth, role-based panels, and QR validation endpoints for gatekeeper verification.
User books ticket and receives QR token
Booking staff validates reservation details
Gatekeeper scans QR to verify entry
Status updates synced to admin dashboard
Backend Case Study
ERP-style backend system for employee, attendance, and document workflows across departments.
Office teams lacked a centralized backend to manage attendance, permissions, documents, and internal notifications.
API-first services for attendance, documents, and notifications using Firebase Auth and Firestore scaling patterns.
Employees authenticate and receive role permissions
Attendance records logged via API
Documents uploaded with access policies
Notifications triggered for approvals
Enterprise teams rely on systems that are secure, scalable, and built for long-term growth.
Battle-tested architecture, observability, and resilience for real-world environments.
MVC and modular services that keep teams fast, aligned, and scalable.
JWT, Firebase Auth, and role-based authorization built into every workflow.
Backend systems engineered for multi-tenant growth and enterprise adoption.
Open to international roles and enterprise product collaborations.