I am a highly skilled Full-Stack developer with over 15 years of experience specializing in Microsoft technologies. I have built strong expertise in ASP.NET Core (C#), Web APIs, ASP.NET MVC, React, Umbraco CMS, Azure, SQL Server, AngularJS, and CSS. I focus on delivering high-performance, secure, and scalable applications that meet business needs and delight users. I have successfully delivered projects across multiple industries, collaborated with cross-functional teams, and often play code owner and mentor roles. I enjoy turning complex requirements into elegant, maintainable software and continuous improvement through CI/CD, cloud services, and modern front-end frameworks.

Osama Al Kassih

I am a highly skilled Full-Stack developer with over 15 years of experience specializing in Microsoft technologies. I have built strong expertise in ASP.NET Core (C#), Web APIs, ASP.NET MVC, React, Umbraco CMS, Azure, SQL Server, AngularJS, and CSS. I focus on delivering high-performance, secure, and scalable applications that meet business needs and delight users. I have successfully delivered projects across multiple industries, collaborated with cross-functional teams, and often play code owner and mentor roles. I enjoy turning complex requirements into elegant, maintainable software and continuous improvement through CI/CD, cloud services, and modern front-end frameworks.

Available to hire

I am a highly skilled Full-Stack developer with over 15 years of experience specializing in Microsoft technologies. I have built strong expertise in ASP.NET Core (C#), Web APIs, ASP.NET MVC, React, Umbraco CMS, Azure, SQL Server, AngularJS, and CSS. I focus on delivering high-performance, secure, and scalable applications that meet business needs and delight users.

I have successfully delivered projects across multiple industries, collaborated with cross-functional teams, and often play code owner and mentor roles. I enjoy turning complex requirements into elegant, maintainable software and continuous improvement through CI/CD, cloud services, and modern front-end frameworks.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
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Language

English
Fluent

Work Experience

Umbraco .NET Core Developer (Contractor) at Equator
March 31, 2025 - September 10, 2025
I joined the team to develop a new website using Umbraco. I was responsible for building the website's content structure, and creating custom templates and features to meet the needs of the business. My tasks included configuring the back-end to ensure seamless content management and creating the required API endpoints to be used by the JS powered components.
Full-Stack .NET with React & Umbraco Developer (Contractor) at The Boxoffice Company
December 31, 2024 - September 10, 2025
Re-joined the team to help continue adding new features & improvements to their online ticketing system, including integration with more third-party Point of Sale and online payment systems. Duties and Responsibilities included adding new components and features to the React app, continuously improving and refactoring it; extending their middleware API solution and ensuring high scalability and performance; working with Azure, writing Logic Apps and Azure Functions, storing files in Blob Storage, and managing CI/CD pipelines; acting as one of the code owners and reviewing PRs.
Full-Stack .NET with React & Umbraco Developer (Contractor) at Equator
September 30, 2020 - September 10, 2025
Working on a financial digital retirement platform to develop applications for creating customer accounts, managing products, and handling transactions and trading actions within user accounts.
.Net Developer (Freelancer) at East Ayrshire Council
December 1, 2019 - Present
Building new features into their internal people management system (WebCIMS) and providing technical support.
.Net Web & Umbraco Developer (Contractor) at D8
July 31, 2019 - September 10, 2025
Supporting the development team to complete building the new websites for the following clients: Citylink, The Glasgow Academy, Balfour + Manson, Harry Gow.
.Net Web & Umbraco Developer (Contractor) at Peach Digital
January 31, 2017 - September 10, 2025
Peach Digital is one of the world’s leading digital providers to the cinema industry. I worked on Landmark Cinemas backend and API development, Booking & Movie APIs, and DTI Ticketing across multiple cinemas in the USA & Europe.
.Net Web Developer (Contractor) at Tactuum Ltd
November 30, 2014 - September 10, 2025
Edinburgh Festival Fringe project: registration of shows, venues and organisations; estimation, development, and sprint review with client.
Web Developer at Conscia Enterprise Ltd
September 1, 2014 - September 10, 2025
Worked on various projects including Umbraco CMS sites and Medway RFID product; responsibilities included requirement analysis, data access with NHibernate, deployment scripts, and team leadership.
Web Developer at Indigo Starfish
February 1, 2008 - September 10, 2025
Built an online ecommerce site for Indigo Starfish using Umbraco; integrated content management with ecommerce and reporting.
Umbraco .NET Core Developer (Contractor) at Equator
March 1, 2025 - September 10, 2025
Joined the team to develop a new website using Umbraco. Responsibilities included building the website's content structure, creating custom templates and features to meet business needs, configuring the back-end for seamless content management, and creating required API endpoints for JavaScript-powered components.
Full-Stack .Net with React & Umbraco Developer (Contractor) at The Boxoffice Company
December 1, 2024 - September 10, 2025
Re-joined the team to continue adding new features and improvements to the online ticketing system, including integration with more third-party Point of Sale and online payment systems. Added new React components, extended middleware API for scalability, worked with Azure, Logic Apps/Functions, Blob Storage, and CI/CD pipelines. Also served as code owner reviewing PRs.
.Net Developer (Freelancer) at East Ayrshire Council
December 1, 2019 - Present
Building new features into the internal people management system (WebCIMS) and providing technical support.
Full-Stack .Net with React & Umbraco Developer (Contractor) at Equator
September 1, 2020 - September 10, 2025
Worked on a financial digital retirement platform to develop applications for creating customer accounts, managing products, and handling transactions and trading actions within user accounts.
Full-Stack .Net with React & Umbraco Developer (Contractor) at The Boxoffice Company
March 1, 2020 - September 10, 2025
Re-joining to continue adding new features and improvements to their online ticketing platform.
.Net Web & Umbraco Developer (Contractor) at D8
November 1, 2019 - September 10, 2025
Supporting the development team to complete building new websites for Citylink, The Glasgow Academy, Balfour + Manson, and Harry Gow.
.Net Web & Umbraco Developer (Contractor) at Webedia UK
July 1, 2019 - September 10, 2025
Re-writing the online cinema ticketing system, built with .NET Core 2, React, and Azure; developing Umbraco CMS content management and API endpoints; Windows services for data integration; building multiple SAAS ticketing sites.
.Net Developer (Contractor) at System C Healthcare Ltd
November 1, 2014 - September 10, 2025
Web development for NHS-related projects, including GP/knowledge portals and system integrations; involved in bug fixes and feature changes.
.Net Developer (Contractor) at Conscia Enterprise Ltd
September 1, 2014 - September 10, 2025
Various NHS/public sector projects, contributing to web development using .NET MVC, NHibernate, and Scrum practices; involved in database work and front-end enhancements.
Online Sales Website Developer (Contractor) at Indigo Starfish
February 1, 2008 - September 10, 2025
Built an e-commerce site for Indigo Starfish, using Umbraco for content management and a custom system to handle ecommerce workflows and reporting.

Education

MSc IT (Software Systems) at Heriot-Watt University, Edinburgh
January 1, 2005 - December 31, 2006
BSc IT (Applied Computer Science) at Philadelphia University, Amman, Jordan
January 1, 2001 - December 31, 2005
MSc IT (Software Systems) at Heriot-Watt University, Edinburgh
January 1, 2005 - January 1, 2006
BSc IT (Applied Computer Science) at Philadelphia University, Amman, Jordan
January 1, 2001 - January 1, 2005

Qualifications

MCTS: Web Applications Development with Microsoft .NET Framework 4 (Exam 70-515)
January 11, 2030 - September 10, 2025
Microsoft .NET Framework – Application Development Foundation
January 11, 2030 - September 10, 2025
Umbraco V5 Level 1
January 11, 2030 - September 10, 2025
MCTS: Web Applications Development with Microsoft .NET Framework 4 (Exam 70-515)
January 11, 2030 - September 10, 2025
Microsoft .NET Framework – Application Development Foundation
January 11, 2030 - September 10, 2025
Umbraco V5 Level 1
January 11, 2030 - September 10, 2025

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Healthcare, Education, Government, Other