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Ahsan Mehmood

Open to remote opportunities

Ahsan MehmoodFull-Stack Engineer

API Development · System Integrations · C# & .NET · Angular · React · 4+ years

I build scalable web applications and backend systems, with a strong focus on performance, reliability and maintainable architecture.

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Work

Featured projects

Independent SaaS products and client websites I designed, built and deployed end to end, plus production systems from my roles.

Independent product

PayFlow Pro

Multi-tenant workforce platform: company onboarding, employee contracts and payroll, check-in attendance, live monitoring, leave approvals and team messaging in one product.

  • Companies self-register and onboard their employees
  • Contracts with hourly or fixed pay, payroll runs and payslips
  • Check-in/check-out attendance and live monitoring
  • Messages, channels, groups and real-time notifications
  • Angular
  • Node.js
  • PostgreSQL
  • Redis
  • WebSockets
  • Firebase
  • Google Cloud Run
Read case study Private codebase

Client project · Real estate

Suite Capacity

Website for a vacation rental management company, presenting its services, markets and managed properties to prospective property owners.

  • Next.js
  • React
View project Website (opens in a new tab)

Client project · E-commerce

NA Organic Store

Online store for a herbal and organic hair-care brand, with a product catalogue, discounts, cart and direct chat ordering.

  • React
View project

Healthcare · Practice management

AI PMS

Practice management system for dental and medical clinics: appointments, patient records, charting, communication and practice analytics in one dashboard.

  • .NET
  • C#
  • React
View project Private codebase

MPN · Full-Stack Engineer

Bonus Automation Platform

A .NET 8 platform that automates bonus eligibility and payouts for 50K+ customer requests a month, with configurable rules and resilient third-party integrations.

8s → <800msBonus evaluation time

  • .NET 8
  • C#
  • NRules
  • Expression Trees
  • Puppeteer Sharp
Read case study Private codebase

Convsync · Full-Stack Engineer

Reporting Performance Overhaul

Moved reporting workloads to PostgreSQL and Redis as part of a microservices modernization, cutting dashboard load time from 12s to under 2s.

12s → <2sDashboard load time

  • PostgreSQL
  • Redis
  • .NET 6
  • Spring WebFlux
  • React 18
Read case study Private codebase

Inibuilds · Software Engineer

Real-time Multiplayer Game Backend

C#/.NET backend for a Unigine multiplayer game: SignalR/WebSocket telemetry and entity sync, Redis state and leaderboards, auto-scaling on AWS.

  • C#
  • .NET
  • SignalR
  • WebSockets
  • Redis
Read case study Private codebase

More projects

Full-stack apps, games, graphics and systems projects across .NET, Angular, NestJS, Unity, OpenGL, C++, C and Python.

Experience

Where I've built things

  1. –

    Islamabad

    Full-Stack Engineer (.NET & Angular) · Enigma Software Solution

    • Built scalable REST APIs using ASP.NET Core (.NET 8) and Azure Functions for asynchronous processing.
    • Implemented a SQL Server + Azure Cosmos DB architecture for transactional and low-latency data workloads.
    • Developed Angular 16+ applications with SignalR for real-time dashboards, notifications and tracking.
    • Designed Azure DevOps CI/CD pipelines with Docker, xUnit/Moq and AKS deployments.
    • Deployed applications on Azure VMs and AKS using Helm, health probes and production deployment practices.
    • Performed load and performance testing using Azure Load Testing and JMeter.
    • ASP.NET Core
    • Azure Functions
    • Cosmos DB
    • SQL Server
    • Angular
    • SignalR
    • AKS
    • Helm

  2. –

    Islamabad

    Full-Stack Engineer (.NET & React) · MPN

    • Built a .NET 8 bonus automation platform processing 50K+ customer requests monthly, automating eligibility and payout workflows.
    • Developed configurable business rules using C#, NRules and Expression Trees to validate identity, KYC, deposits and withdrawals.
    • Built automated vendor and third-party system integrations using Puppeteer Sharp, HttpClient and Polly, synchronizing data with SQL Server.
    • Developed customer and admin web applications with RBAC, audit logs, reporting and SignalR real-time updates.
    • CRM & vendor integrations: synchronized contacts and deals with HubSpot through its REST API, received webhook events, and consumed vendor SOAP/WSDL services from .NET.
    • Optimized SQL Server queries and Redis caching, reducing bonus evaluation time from 8s to <800ms.
    • Implemented JWT/OAuth 2.0, TDD with xUnit/Moq, and CI/CD using GitHub Actions and Docker.
    • .NET 8
    • NRules
    • Puppeteer Sharp
    • Polly
    • SQL Server
    • Redis
    • Vue.js 3
    • SignalR

  3. –

    Lahore

    Full-Stack Engineer (.NET, Spring Boot & React) · Convsync

    • Modernized a legacy application into Spring Boot and .NET Core microservices, improving maintainability and deployment efficiency.
    • Developed REST APIs with Spring WebFlux and .NET 6, integrated with Angular and React frontends.
    • Migrated reporting workloads to PostgreSQL and Redis, reducing dashboard load time from 12s to <2s.
    • Built React dashboards using React 18, TypeScript and Tailwind CSS.
    • Webhooks & integrations: built webhook receivers and publishers with retry handling to connect the microservices with external systems and CRM data (HubSpot).
    • Implemented Clean Architecture, JWT/OAuth 2.0 and role-based access control.
    • Established GitHub Actions CI/CD pipelines and automated testing with JUnit/xUnit.
    • .NET 6
    • Spring WebFlux
    • PostgreSQL
    • Redis
    • React 18
    • Angular
    • GitHub Actions

  4. –

    Delhi · Part-time · Project-based

    Software Engineer (.NET) · Stabilis Business Solution

    • Developed backend services using .NET Core, Entity Framework Core and Dapper for multiple client projects.
    • Built REST APIs using MediatR, FluentValidation and AutoMapper, following CQRS-based architecture.
    • Implemented Hangfire for scheduled jobs, bulk processing, exports and automated reports.
    • Integrated Stripe, PayPal and Twilio with Polly retry and circuit-breaker policies.
    • Optimized SQL Server queries, stored procedures and database execution plans.
    • Deployed applications using Docker and GitHub Actions with automated build and testing pipelines.
    • .NET Core
    • EF Core
    • Dapper
    • MediatR
    • Hangfire
    • Stripe
    • SQL Server

  5. –

    London · 6-month contract

    Software Engineer (Real-time Game Backend) · Inibuilds

    • Developed multiplayer game backend systems using C#/.NET and Unigine Engine for real-time game functionality.
    • Implemented SignalR/WebSocket telemetry for real-time analytics and entity synchronization.
    • Built C# automation and load-testing tools using the Task Parallel Library (TPL).
    • Deployed game services on AWS EC2 with Auto Scaling, ELB and CloudWatch.
    • Used Redis for session state, leaderboards and pub/sub messaging.
    • Developed unit and integration tests using NUnit and Moq.
    • C#
    • .NET
    • SignalR
    • Redis
    • AWS EC2
    • NUnit

Skills

Tools I use in production

Integrations

  • HubSpot (CRM)
  • REST/HTTP APIs
  • SOAP/WSDL
  • Webhooks
  • Swagger/OpenAPI
  • Stripe
  • PayPal
  • Twilio
  • Polly
  • Hangfire
  • Puppeteer Sharp
  • SignalR

Backend

  • C#
  • .NET
  • ASP.NET Core
  • REST APIs
  • Entity Framework Core
  • Dapper
  • Node.js
  • NestJS
  • Java

Frontend

  • React
  • Angular
  • Vue.js
  • Next.js
  • TypeScript
  • JavaScript
  • SignalR
  • Tailwind CSS

Data

  • SQL Server
  • PostgreSQL
  • Redis
  • Cosmos DB
  • Firestore

Cloud & DevOps

  • Azure
  • AWS
  • GCP
  • Docker
  • Kubernetes
  • Helm
  • GitHub Actions
  • Azure DevOps

Architecture

  • Microservices
  • Clean Architecture
  • CQRS
  • DDD

Testing

  • xUnit
  • NUnit
  • Moq

About

A bit about me

Portrait of Ahsan Mehmood

Full-Stack Software Engineer with 4+ years of experience in API development and system integrations: designing REST APIs and microservices (ASP.NET Core / .NET 8, Spring WebFlux, Azure Functions) and connecting CRM platforms (HubSpot) and other systems with external vendor and third-party services (payment gateways, SMS, SOAP and REST APIs, webhooks, browser automation) using resilient HTTP clients, retries and circuit breakers. Also builds the Angular, React and Vue.js frontends on top. Experienced in SQL Server, PostgreSQL, Redis, Azure, AWS, GCP, Docker and CI/CD, with a focus on reliability, performance, testing and maintainable architecture.

BS Computer Science, FAST NUCES, Islamabad · Pakistan · UTC+5 · Remote

What I do

  • API development

    REST APIs and microservices with ASP.NET Core, .NET 8, Spring WebFlux and Azure Functions, secured with JWT/OAuth 2.0 and documented with OpenAPI.

  • System integrations

    Connecting CRM platforms (HubSpot) and business systems to vendor and third-party services over REST, SOAP and webhooks (Stripe, PayPal, Twilio) with Polly retries and circuit breakers, Hangfire sync jobs and Azure Functions.

  • Full-stack web apps

    React, Angular and Vue.js front ends wired to real-time back ends with SignalR and WebSockets.

  • Cloud & delivery

    Azure, AWS and GCP deployments with Docker, Kubernetes (AKS) and CI/CD on GitHub Actions and Azure DevOps.

  • Performance & reliability

    SQL tuning, Redis caching, load testing and automated tests with xUnit, NUnit and Moq.

Contact

Let's talk

I'm open to remote full-stack .NET roles and selected freelance projects. The quickest way to reach me is email or the form.

Pakistan · UTC+5 · Remote

or email me directly