Available to hire
I am Osama Al Kassih, a highly skilled Full-Stack developer with over 15 years of software development experience, specializing in Microsoft technologies such as ASP.NET Core, Web APIs, and Azure. I have built high-performance, secure, and scalable applications across healthcare, government, media, and finance sectors, collaborating with cross-functional teams to deliver robust solutions.
I enjoy taking ownership of complex features from concept to production, mentoring teammates, and continuously learning new tools and frameworks to stay ahead in a fast-moving tech landscape.
Skills
Language
English
Fluent
Work Experience
Umbraco .NET Core Developer (Contractor) at Equator
March 1, 2025 - October 6, 2025Joined the team to develop a new website using Umbraco, built the content structure, created custom templates and features, configured the back-end for seamless content management, and created API endpoints used by JavaScript components.
Full-Stack .NET Developer with React & Umbraco (Contractor) at The Boxoffice Company
December 1, 2024 - October 6, 2025Extended the online ticketing system with new React components, refactored middleware API for scalability, and integrated with external POS and online payment systems. Worked with Azure (Logic Apps, Functions, Blob Storage) and CI/CD pipelines; acted as a code owner reviewing PRs.
.NET Developer (Freelancer) at East Ayrshire Council
December 1, 2019 - PresentBuilt new features for the internal people management system (WebCIMS) and provided ongoing technical support.
Full-Stack .NET Developer with React & Umbraco (Contractor) at Equator
September 1, 2020 - October 6, 2025Delivered features and improvements to the system, integrated with POS and online payments, worked with Azure Logic Apps and Functions, stored files in Blob Storage, and managed CI/CD pipelines.
Full-Stack .NET Developer with React & Umbraco (Contractor) at The Boxoffice Company
March 1, 2020 - October 6, 2025Re-joined to continue adding new features and improvements to the React app and middleware API; ensured high scalability and performance.
.Net Web & Umbraco Developer (Contractor) at D8, Glasgow
July 1, 2019 - October 6, 2025Contractor role focusing on .NET Web & Umbraco development, contributing to building client websites using C#, MVC, and Umbraco CMS.
.Net Web & Umbraco Developer (Contractor) at Peach Digital
January 1, 2017 - October 6, 2025Wrote backend APIs and Umbraco-based content platforms for cinema ticketing projects, including SAAS ticketing across multiple sites; developed and refactored APIs powering client websites and apps.
Web Developer at Conscia Enterprise Ltd
September 1, 2014 - October 6, 2025Web development work for NHS/healthcare projects, including Umbraco-based sites and integration with NHibernate, SVN, and deployment workflows; contributed to multiple NHS Scotland knowledge sites.
Umbraco .NET Core Developer (Contractor) at Equator
March 1, 2025 - October 6, 2025Joined to develop a new website using Umbraco; responsible for building the content structure, creating custom templates and features, configuring the back-end for seamless content management, and creating the required API endpoints used by JavaScript-powered components.
Full-Stack .NET Developer (Contractor) at The Boxoffice Company
December 1, 2024 - October 6, 2025Re-joined to continue adding new features and improvements to the online ticketing system, including integration with third-party POS and online payment systems; extended middleware API solutions and ensured high scalability and performance; Azure, Logic Apps and Azure Functions usage; CI/CD pipelines; code review.
.NET Developer (Freelancer) at East Ayrshire Council
December 1, 2019 - PresentBuilding new features into their internal people management system (WebCIMS) and providing technical support.
Full-Stack .NET Developer (Contractor) at Equator
March 1, 2020 - October 6, 2025Worked 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 Umbraco Developer at D8 Glasgow
November 1, 2019 - October 6, 2025Supported the development team to complete building new websites for client sites such as Citylink, The Glasgow Academy, Balfour + Manson, and Harry Gow; Agile environment; Umbraco and API endpoints for content retrieval.
.NET Web & Umbraco Developer (Contractor) at Webedia UK
July 1, 2019 - October 6, 2025Wrote a new online cinema ticketing system using .NET Core with React and Bootstrap; Umbraco-based content management; Windows services for data synchronization; built Movie, Booking, and Member APIs; integrated with cinema websites and mobile apps; SAAS ticketing (multi-site).
.NET Web & Umbraco Developer (Contractor) at Peach Digital
January 1, 2017 - October 6, 2025Led backend and Umbraco development for cinema industry clients (e.g., Landmark Cinemas); built Booking & Movie APIs; DTI Ticketing; all content managed in Umbraco; set up SAAS architecture and APIs consumed by client sites and apps.
.NET Web Developer (Contractor) at Tactuum Ltd
January 1, 2017 - October 6, 2025Edinburgh Festival Fringe project: registration of shows, venues and organizations; agile planning, estimation, implementation, testing, sprint reviews, and client feedback.
Web Developer (.NET) Contractor at System C Healthcare Ltd
November 1, 2014 - October 6, 2025Provided support for two NHS-related projects; addressed change requests, implemented improvements, and ensured alignment with client expectations; worked with Agile, .NET 4, NHibernate, Scrum, IIS7.
Web Developer at Conscia Enterprise Ltd
September 1, 2014 - October 6, 2025Worked on multiple Umbraco projects for NHS Scotland; developed knowledge management sites; integrated FAST search; built widget framework and enterprise search components; database design, NUnit tests, deployment scripts, and Scrum involvement.
.NET Web Developer at Indigo Starfish
February 1, 2008 - October 6, 2025Built an online sales site using Umbraco; managed content; implemented ecommerce features and reporting; supported integration with call center workflows.
.NET Web & Umbraco Developer (Contractor) at Peach Digital
January 1, 2017 - October 6, 2025Proj. unfolded within the Peach Digital portfolio focusing on cinema industry solutions with Umbraco CMS and API-first approaches.
Education
MSc IT (Software Systems) at Heriot-Watt University, Edinburgh
January 1, 2005 - January 1, 2006BSc IT (Applied Computer Science) at Philadelphia University, Amman, Jordan
January 1, 2001 - January 1, 2005MSc IT (Software Systems) at Heriot-Watt University, Edinburgh
January 1, 2005 - January 1, 2006BSc IT (Applied Computer Science) at Philadelphia University, Amman, Jordan
January 1, 2001 - January 1, 2005Qualifications
MCTS: Web Applications Development with Microsoft .NET Framework 4 (Exam 70-515)
January 11, 2030 - October 6, 2025Microsoft .NET Framework – Application Development Foundation
January 11, 2030 - October 6, 2025Umbraco V5 Level 1
January 11, 2030 - October 6, 2025MCTS: Web Applications Development with Microsoft .NET Framework 4 (Exam 70-515)
January 11, 2030 - October 6, 2025Microsoft .NET Framework – Application Development Foundation
January 11, 2030 - October 6, 2025Umbraco V5 Level 1
January 11, 2030 - October 6, 2025Industry Experience
Software & Internet, Education, Government, Healthcare, Media & Entertainment, Professional Services
Skills
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