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Hitesh Kumar

@deviserops

Senior Backend Engineer specializing in secure FinTech payment systems, scalable microservices, and high-performance APIs.

India

Message

What I'm looking for

I’m looking for a remote-friendly team to build secure, high-traffic REST APIs and FinTech payment microservices—while mentoring engineers and continuously optimizing databases, webhooks, and system design for reliability.

## Technical Expertise

* Languages & Frameworks: PHP (Laravel, CodeIgniter), Python (Django, DRF), Dart (Flutter), JavaScript, TypeScript

* Databases & Architecture: MySQL (Database Schema Design, Normalization, Query Optimization, Stored Procedures, Indexing)

* FinTech & Third-Party: Stripe, Razorpay, Payment Webhooks Processing, Twilio, PubNub, Firebase

* DevOps & Cloud Tools: Docker, Docker Compose, AWS S3, Nginx, Apache, Linux (Ubuntu), Git, GitHub, DNS Management

* Software Engineering: System Design, Design Patterns, SOLID Principles, Repository Pattern, Service Layer Architecture

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## Open Source Contributions & Production Apps

* dj-all-auth (Python / Django Package) — [PyPI Link](https://pypi.org)

* Maintained an open-source Django engine providing developers with immediate social login configuration setups for Google, Discord, and Steam APIs.

* Justify (JavaScript Utility) — [GitHub Link](https://github.com/deviserops)

* Built framework-agnostic utilities utilizing class-triggered dynamic global AJAX form handler submission logic.

* Notify (NPM Package) — [NPM Link](https://npmjs.com)

* Built a lightweight, production-ready vanilla JavaScript module to handle customized UI alert triggers.

* Production Mobile Applications (Flutter / Live on Google Play Store) — Battery Alarm • Focus Desk

* Architected, optimized, and published utilities focusing heavily on native hardware state observation and mobile workflows.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Dotsquares

May 2026 - Present (3 months)

Architecting and scaling enterprise-grade Laravel business web infrastructures, building microservices and secure, decoupled REST APIs for high-traffic systems. Optimizing backend operations by refactoring database queries and collaborating in distributed agile ceremonies with peer mentorship and codebase guideline standardization.

Laravel PHP Microservices REST APIs Refactoring Mentorship

Senior Software Engineer

OnGraph Technologies

Jul 2017 - May 2026 (8 years 10 months)

Developed enterprise SaaS cloud applications using Laravel and CodeIgniter, including decoupled API endpoints for responsive web platforms and Flutter client modules. Built payment ecosystems integrating Stripe and Razorpay, engineered high-performance relational database layouts, and implemented resilient webhook layers for asynchronous processing with reliable fallbacks.