Available for hire · Worldwide

I build enterprise platforms,
REST APIs & scalable web experiences.

Results-driven Full Stack Software Engineer with 6+ years of experience building scalable, high-performing enterprise applications used by millions of users. Proficient across PHP/Laravel and actively expanding into C#/.NET Core, with hands-on production experience in both stacks. Proven track record in REST API design, React.js frontend development, CI/CD pipelines and Agile delivery. Led a team of 10 engineers for 18+ months and delivered solutions for international clients across New Zealand, Canada, and the USA.

PHP / LaravelC# / .NET CoreReact.jsREST APIs
Hire MeDownload CV
6+
Years building enterprise apps
10
Engineers led for 18+ months
1M+
Records migrated, zero data loss
30%
Fewer recurring defects (best case)
EnterpriseService.cs
// Senior Software Engineer
public class EnterpriseService : IApiService {
  // 6+ years · 10 engineers led · 1M+ records migrated
  readonly string[] stack = {
    "Laravel", ".NET Core",
    "React.js", "MySQL",
  };

  [HttpGet]
  public IActionResult Get() =>
    Ok(Reliable());
}
build — succeeded0 errors
01

Backend Engineering

Scalable REST APIs and enterprise services built with PHP/Laravel and C#/.NET Core, powering platforms used by millions of users.

PHPLaravelC#.NET Core
02

Frontend Development

Responsive, accessible interfaces built with React.js, JavaScript (ES6+), Bootstrap and Blade - tuned for real-world usability.

React.jsJavaScriptBootstrapBlade
03

Multi-Tenant SaaS Architecture

Multi-tenant enterprise platforms architected with EF Core Query Filters and custom middleware for clean tenant isolation.

Multi-TenancyEF CoreMiddleware
04

Payments & Integrations

Secure payment and messaging integrations - Stripe, PayPal, CyberSource with 3D Secure, Twilio, SendGrid, and OneSignal.

StripePayPalCyberSourceTwilio
01Achievements

Impact & Achievements

01

Leadership & Delivery

  • Led a 10-engineer team for 18+ months across full Agile SDLC, delivery, code quality, mentorship, and client communication.
  • Built and scaled full-stack solutions for international clients across New Zealand, Canada, and the United States.
02

Scale & Reliability

  • Migrated 1M+ records across enterprise systems with zero data loss and no unplanned downtime.
  • Reduced recurring production defects by ~30% through systematic root-cause analysis and refactoring.
03

Performance & Optimisation

  • Delivered ~20-30% performance improvements across multiple platforms through caching, API tuning, and query optimisation.
  • Automated high-volume telecom sales workflows, improving team operational efficiency by 40% at DIDX.Net.
04

Payments & Integrations

  • Integrated secure payment solutions (Stripe, PayPal, CyberSource with 3D Secure) handling real-money transactions for global e-commerce platforms.
  • Converted 30+ legacy SOAP endpoints to RESTful APIs, modernising system integrations across production platforms.
02About

6+ years turning specs into enterprise platforms that scale.

I'm Muhammad Shakaib, a full stack software engineer based in Karachi. I design, build and ship backend services and REST APIs in PHP/Laravel and C#/.NET Core, paired with React.js frontends — with hands-on production experience architecting multi-tenant SaaS platforms, payment integrations, and high-traffic enterprise systems.

Along the way I've led a 10-engineer team for 18+ months and delivered solutions for international clients across New Zealand, Canada and the USA, always with an eye on performance, clean architecture, and a codebase the next engineer can actually work with.

Role
Senior Software Engineer
Based in
Worldwide
Focus
PHP/Laravel · C#/.NET · React.js
Status
Open to Malaysia relocation
03Services

What I can build for your product.

Backend & API Development

REST API design and enterprise backend services in PHP/Laravel and C#/.NET Core, built on clean MVC and Repository patterns.

React.js Frontend Development

Responsive, accessible React.js interfaces with JavaScript (ES6+), Bootstrap, jQuery and ARIA/WCAG-compliant markup.

Multi-Tenant SaaS Architecture

Multi-tenant infrastructure using EF Core Global Query Filters and middleware for complete, centrally-managed tenant isolation.

Payment Gateway Integration

Secure, 3D-Secure payment flows with Stripe, PayPal and CyberSource for international, multi-currency e-commerce platforms.

Database & Performance Optimisation

MySQL and SQL Server query optimisation, indexing, schema design and Redis caching for high-traffic production systems.

CI/CD & DevOps

GitHub Actions pipelines, Git branching strategies and Agile/Scrum delivery processes for reliable, frequent releases.

Legacy Modernisation

Migrating legacy SOAP endpoints to RESTful APIs and large-scale data migrations with zero downtime and full validation.

Technical Leadership & Mentorship

Sprint planning, code reviews and technical mentorship for engineering teams, plus direct communication with international stakeholders.

04Resume

Where I've worked, and what I know.

Download full CV

Experience

  1. May 2024 - Present

    Software Developer

    Contour Software

    • Build and maintain enterprise .NET Core applications covering REST APIs, authentication workflows, admin dashboards, and backend services serving large user bases.
    • Resolve high-priority production issues through systematic root-cause analysis and code refactoring, reducing recurring defects by ~30% and improving system reliability.
    • Implement accessibility improvements adhering to WCAG standards using JavaScript, Bootstrap, and ARIA, improving usability across diverse user groups.
    • Optimise database queries, API endpoints, and caching strategies, achieving measurable reductions in page load times (~15%) for high-traffic enterprise deployments.
    • Champion best practices within Agile teams: code reviews, branching strategies, and peer knowledge-sharing sessions.

  2. Nov 2024 - Mar 2025

    LLM - PHP/JS Developer

    Turing (Remote)

    • Engineered and fine-tuned large language models using SFT and RLHF, developing deep insight into AI-driven product development and data-driven reasoning systems.
    • Designed complex multi-step task flows and scenario-based datasets to improve real-world model reasoning and decision-making, collaborating with cross-functional AI experts globally.

  3. Apr 2021 - May 2024

    Senior Software Engineer

    Cooperative Computing

    • Led a team of 10 software engineers for 18+ months - sprint planning, code reviews, task allocation, technical mentorship, and direct communication with international stakeholders.
    • Designed and delivered full-stack features across Laravel (PHP) and .NET Core (C#) platforms, including e-commerce flows, payment gateway integrations (Stripe, PayPal, CyberSource), and enterprise dashboards.
    • Architected multi-tenant enterprise solutions using EF Core Query Filters and custom middleware, enabling centralised management of multiple client environments.
    • Executed migration of 1M+ records with zero data loss and full business continuity, leveraging robust validation and rollback procedures.
    • Improved application performance by ~20% through Redis caching, query optimisation, and API refactoring, directly improving user experience for high-traffic platforms.
    • Built React.js frontends for enterprise loyalty platforms and data-driven research tools serving Dubai-based audiences.

  4. Dec 2019 - Mar 2021

    Software Engineer

    Cybarea Pvt. Ltd.

    • Converted 30+ legacy SOAP endpoints to RESTful APIs, modernising system integrations and improving reliability and developer experience.
    • Built 3 automation modules for DIDX.Net that increased telecom sales team operational efficiency by ~40%.
    • Implemented CRON jobs, background workers, API security layers, and SQL query optimisations to improve scalability and reduce operational overhead.

Education

Bachelor of Science in Computer Science (2019)

Sir Syed University of Engineering and Technology, Karachi, Pakistan

Skills

Languages

PHPC#JavaScriptSQLLINQ

Frameworks

Laravel 8 & 9.NET Core / ASP.NET CoreReact.jsEntity Framework Core

Frontend

React.jsJavaScript (ES6+)BootstrapjQueryBladeARIA / WCAG

Databases

MySQLSQL ServerQuery OptimisationIndexingSchema DesignRedis Caching

Cloud & Infra

AWS (EC2, RDS, S3, IAM)DockerNginxApacheUbuntu Linux

CI/CD & DevOps

GitHub ActionsGitHubJiraCI/CD PipelinesGit Branching

Architecture

REST APIsMulti-TenancyMVCRepository PatternEvent-DrivenQueues & Background Jobs

Integrations

StripePayPalCyberSourceTwilioSendGridOneSignalGoogle APIsFacebook APIs
05Portfolio

A few apps I've shipped to production.

C
SaaS · Camp Management · USA

CampSite

Automated SaaS camp management platform for day and overnight camps across North America - registration, parent dashboards, scheduling, billing, and myCAMPapp's companion mobile backend.

Core PHP.NET CoreAngularMySQLSQL Server
C
E-Commerce · New Zealand

Comvita

Full e-commerce platform for a major NZ brand - product pages, checkout, and order management. Progressed from developer to Project Lead, managing a 10-person team.

LaravelPHPJavaScriptMySQLStripe
EMS
Web · Multi-Tenant

Enterprise Multi-Tenant SaaS

Multi-tenant SaaS infrastructure architected with EF Core Global Query Filters and middleware for complete tenant isolation, adopted across multiple international enterprise clients.

.NET CoreEF CoreC#SQL Server
RMS
Web · Loyalty Platform

Royal Management System

React.js frontend features for a global enterprise loyalty platform serving top-tier fashion brands, collaborating on API integration and performance.

React.jsJavaScriptRuby on Rails
RYP
Performance · Canada

Royal York Property Management

Improved platform response times by 20% for a major Canadian property management company through Redis caching, query tuning, and API optimisation.

WordPressRedisQuery Tuning
D
Telecom Automation · USA

DIDX.Net

Automation modules eliminating manual sales workflows for a Delaware-based telecom platform, improving team efficiency by 40%.

PHPJavaScriptMySQL
06Contact

Have an app idea? Let's bring it to life.

Location

Worldwide

Elsewhere

LinkedInGitHub